/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/egcd2-ll_valuebound20.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-5d317bd [2022-03-18 14:20:08,335 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-18 14:20:08,336 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-18 14:20:08,365 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-03-18 14:20:08,385 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-03-18 14:20:08,386 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-03-18 14:20:08,386 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-03-18 14:20:08,387 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-03-18 14:20:08,387 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-03-18 14:20:08,388 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-03-18 14:20:08,388 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-03-18 14:20:08,389 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-03-18 14:20:08,390 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-03-18 14:20:08,391 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-03-18 14:20:08,391 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-03-18 14:20:08,392 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-03-18 14:20:08,392 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-03-18 14:20:08,394 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-03-18 14:20:08,398 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-03-18 14:20:08,398 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-03-18 14:20:08,404 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-03-18 14:20:08,405 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 [2022-03-18 14:20:08,421 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-18 14:20:08,422 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-18 14:20:08,422 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-03-18 14:20:08,422 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-03-18 14:20:08,423 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-03-18 14:20:08,424 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-03-18 14:20:08,424 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-03-18 14:20:08,424 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-03-18 14:20:08,424 INFO L138 SettingsManager]: * Use SBE=true [2022-03-18 14:20:08,425 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-18 14:20:08,425 INFO L138 SettingsManager]: * sizeof long=4 [2022-03-18 14:20:08,425 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-18 14:20:08,425 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-03-18 14:20:08,425 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-18 14:20:08,425 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-18 14:20:08,425 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-18 14:20:08,425 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-18 14:20:08,425 INFO L138 SettingsManager]: * sizeof long double=12 [2022-03-18 14:20:08,425 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-18 14:20:08,426 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-18 14:20:08,426 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-18 14:20:08,426 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-18 14:20:08,426 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-18 14:20:08,426 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-18 14:20:08,426 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-18 14:20:08,426 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-18 14:20:08,426 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-03-18 14:20:08,426 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-03-18 14:20:08,426 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-03-18 14:20:08,426 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-03-18 14:20:08,427 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-03-18 14:20:08,427 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-03-18 14:20:08,427 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-03-18 14:20:08,427 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-03-18 14:20:08,589 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-18 14:20:08,615 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-18 14:20:08,619 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-18 14:20:08,620 INFO L271 PluginConnector]: Initializing CDTParser... [2022-03-18 14:20:08,620 INFO L275 PluginConnector]: CDTParser initialized [2022-03-18 14:20:08,622 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/egcd2-ll_valuebound20.c [2022-03-18 14:20:08,671 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ea8ee8b94/3776fd2b3ef94c2fbf13edf18d87d47d/FLAGc93ef5bc4 [2022-03-18 14:20:09,056 INFO L306 CDTParser]: Found 1 translation units. [2022-03-18 14:20:09,057 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/egcd2-ll_valuebound20.c [2022-03-18 14:20:09,062 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ea8ee8b94/3776fd2b3ef94c2fbf13edf18d87d47d/FLAGc93ef5bc4 [2022-03-18 14:20:09,071 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ea8ee8b94/3776fd2b3ef94c2fbf13edf18d87d47d [2022-03-18 14:20:09,073 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-18 14:20:09,074 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-03-18 14:20:09,075 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-03-18 14:20:09,075 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-03-18 14:20:09,093 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-03-18 14:20:09,094 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.03 02:20:09" (1/1) ... [2022-03-18 14:20:09,095 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2eb63caf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 02:20:09, skipping insertion in model container [2022-03-18 14:20:09,095 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.03 02:20:09" (1/1) ... [2022-03-18 14:20:09,100 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-03-18 14:20:09,112 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-03-18 14:20:09,256 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/egcd2-ll_valuebound20.c[490,503] [2022-03-18 14:20:09,269 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-18 14:20:09,276 INFO L203 MainTranslator]: Completed pre-run [2022-03-18 14:20:09,287 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/egcd2-ll_valuebound20.c[490,503] [2022-03-18 14:20:09,304 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-18 14:20:09,314 INFO L208 MainTranslator]: Completed translation [2022-03-18 14:20:09,314 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 02:20:09 WrapperNode [2022-03-18 14:20:09,314 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-03-18 14:20:09,315 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-18 14:20:09,315 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-18 14:20:09,315 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-18 14:20:09,321 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 02:20:09" (1/1) ... [2022-03-18 14:20:09,322 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 02:20:09" (1/1) ... [2022-03-18 14:20:09,333 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 02:20:09" (1/1) ... [2022-03-18 14:20:09,333 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 02:20:09" (1/1) ... [2022-03-18 14:20:09,344 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 02:20:09" (1/1) ... [2022-03-18 14:20:09,346 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 02:20:09" (1/1) ... [2022-03-18 14:20:09,347 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 02:20:09" (1/1) ... [2022-03-18 14:20:09,348 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-18 14:20:09,349 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-18 14:20:09,349 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-18 14:20:09,349 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-18 14:20:09,353 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 02:20:09" (1/1) ... [2022-03-18 14:20:09,358 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-18 14:20:09,364 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 14:20:09,376 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) [2022-03-18 14:20:09,382 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 [2022-03-18 14:20:09,404 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-03-18 14:20:09,404 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-18 14:20:09,404 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-03-18 14:20:09,405 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-03-18 14:20:09,405 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-03-18 14:20:09,405 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-03-18 14:20:09,405 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-03-18 14:20:09,405 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-03-18 14:20:09,405 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-03-18 14:20:09,405 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-03-18 14:20:09,406 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-03-18 14:20:09,406 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-03-18 14:20:09,406 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-03-18 14:20:09,406 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-03-18 14:20:09,406 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-03-18 14:20:09,406 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-03-18 14:20:09,406 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-18 14:20:09,406 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-03-18 14:20:09,406 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-03-18 14:20:09,406 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-03-18 14:20:09,454 INFO L234 CfgBuilder]: Building ICFG [2022-03-18 14:20:09,455 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-18 14:20:09,577 INFO L275 CfgBuilder]: Performing block encoding [2022-03-18 14:20:09,582 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-18 14:20:09,582 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-03-18 14:20:09,584 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.03 02:20:09 BoogieIcfgContainer [2022-03-18 14:20:09,584 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-18 14:20:09,585 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-18 14:20:09,585 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-18 14:20:09,588 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-18 14:20:09,588 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.03 02:20:09" (1/3) ... [2022-03-18 14:20:09,589 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5f174fbd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.03 02:20:09, skipping insertion in model container [2022-03-18 14:20:09,589 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 02:20:09" (2/3) ... [2022-03-18 14:20:09,589 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5f174fbd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.03 02:20:09, skipping insertion in model container [2022-03-18 14:20:09,589 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.03 02:20:09" (3/3) ... [2022-03-18 14:20:09,590 INFO L111 eAbstractionObserver]: Analyzing ICFG egcd2-ll_valuebound20.c [2022-03-18 14:20:09,594 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-03-18 14:20:09,594 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-18 14:20:09,628 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-18 14:20:09,634 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 [2022-03-18 14:20:09,634 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-03-18 14:20:09,647 INFO L276 IsEmpty]: Start isEmpty. Operand has 40 states, 20 states have (on average 1.45) internal successors, (29), 22 states have internal predecessors, (29), 14 states have call successors, (14), 4 states have call predecessors, (14), 4 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2022-03-18 14:20:09,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-03-18 14:20:09,651 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 14:20:09,652 INFO L500 BasicCegarLoop]: trace histogram [6, 6, 6, 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] [2022-03-18 14:20:09,652 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 14:20:09,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 14:20:09,657 INFO L85 PathProgramCache]: Analyzing trace with hash -587582002, now seen corresponding path program 1 times [2022-03-18 14:20:09,664 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 14:20:09,664 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1352430305] [2022-03-18 14:20:09,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 14:20:09,665 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 14:20:09,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 14:20:09,826 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 14:20:09,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 14:20:09,842 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-18 14:20:09,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 14:20:09,851 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-18 14:20:09,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 14:20:09,864 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-03-18 14:20:09,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 14:20:09,874 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2022-03-18 14:20:09,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 14:20:09,884 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2022-03-18 14:20:09,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 14:20:09,891 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-03-18 14:20:09,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 14:20:09,899 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-03-18 14:20:09,900 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 14:20:09,900 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1352430305] [2022-03-18 14:20:09,901 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1352430305] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 14:20:09,901 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 14:20:09,902 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-18 14:20:09,903 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1294542684] [2022-03-18 14:20:09,903 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 14:20:09,907 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-03-18 14:20:09,908 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 14:20:09,931 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-03-18 14:20:09,932 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-18 14:20:09,933 INFO L87 Difference]: Start difference. First operand has 40 states, 20 states have (on average 1.45) internal successors, (29), 22 states have internal predecessors, (29), 14 states have call successors, (14), 4 states have call predecessors, (14), 4 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) 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, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-03-18 14:20:10,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 14:20:10,031 INFO L93 Difference]: Finished difference Result 73 states and 118 transitions. [2022-03-18 14:20:10,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-03-18 14:20:10,033 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, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 43 [2022-03-18 14:20:10,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 14:20:10,039 INFO L225 Difference]: With dead ends: 73 [2022-03-18 14:20:10,039 INFO L226 Difference]: Without dead ends: 35 [2022-03-18 14:20:10,042 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-18 14:20:10,046 INFO L912 BasicCegarLoop]: 39 mSDtfsCounter, 20 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 14:20:10,047 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [32 Valid, 42 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 14:20:10,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2022-03-18 14:20:10,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2022-03-18 14:20:10,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 17 states have (on average 1.1764705882352942) internal successors, (20), 19 states have internal predecessors, (20), 14 states have call successors, (14), 4 states have call predecessors, (14), 3 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2022-03-18 14:20:10,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 46 transitions. [2022-03-18 14:20:10,090 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 46 transitions. Word has length 43 [2022-03-18 14:20:10,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 14:20:10,090 INFO L478 AbstractCegarLoop]: Abstraction has 35 states and 46 transitions. [2022-03-18 14:20:10,091 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, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-03-18 14:20:10,091 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 46 transitions. [2022-03-18 14:20:10,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-03-18 14:20:10,093 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 14:20:10,093 INFO L500 BasicCegarLoop]: trace histogram [6, 6, 6, 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] [2022-03-18 14:20:10,093 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-18 14:20:10,094 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 14:20:10,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 14:20:10,095 INFO L85 PathProgramCache]: Analyzing trace with hash 987777007, now seen corresponding path program 1 times [2022-03-18 14:20:10,095 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 14:20:10,095 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1780597635] [2022-03-18 14:20:10,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 14:20:10,096 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 14:20:10,131 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 14:20:10,132 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1917251902] [2022-03-18 14:20:10,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 14:20:10,132 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 14:20:10,132 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 14:20:10,134 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) [2022-03-18 14:20:10,135 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-03-18 14:20:10,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 14:20:10,199 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-18 14:20:10,203 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 14:20:10,305 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-03-18 14:20:10,306 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 14:20:10,429 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-03-18 14:20:10,430 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 14:20:10,430 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1780597635] [2022-03-18 14:20:10,430 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 14:20:10,430 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1917251902] [2022-03-18 14:20:10,430 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1917251902] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 14:20:10,430 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 14:20:10,430 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2022-03-18 14:20:10,431 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [27808891] [2022-03-18 14:20:10,431 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-18 14:20:10,432 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-03-18 14:20:10,432 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 14:20:10,432 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-03-18 14:20:10,432 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-03-18 14:20:10,432 INFO L87 Difference]: Start difference. First operand 35 states and 46 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) [2022-03-18 14:20:10,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 14:20:10,499 INFO L93 Difference]: Finished difference Result 52 states and 69 transitions. [2022-03-18 14:20:10,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-18 14:20:10,499 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) Word has length 44 [2022-03-18 14:20:10,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 14:20:10,500 INFO L225 Difference]: With dead ends: 52 [2022-03-18 14:20:10,500 INFO L226 Difference]: Without dead ends: 44 [2022-03-18 14:20:10,501 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 81 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2022-03-18 14:20:10,501 INFO L912 BasicCegarLoop]: 38 mSDtfsCounter, 19 mSDsluCounter, 146 mSDsCounter, 0 mSdLazyCounter, 81 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 184 SdHoareTripleChecker+Invalid, 92 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 81 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-18 14:20:10,502 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [24 Valid, 184 Invalid, 92 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 81 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-18 14:20:10,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2022-03-18 14:20:10,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 37. [2022-03-18 14:20:10,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 19 states have (on average 1.1578947368421053) internal successors, (22), 20 states have internal predecessors, (22), 14 states have call successors, (14), 4 states have call predecessors, (14), 3 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2022-03-18 14:20:10,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 48 transitions. [2022-03-18 14:20:10,509 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 48 transitions. Word has length 44 [2022-03-18 14:20:10,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 14:20:10,509 INFO L478 AbstractCegarLoop]: Abstraction has 37 states and 48 transitions. [2022-03-18 14:20:10,509 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) [2022-03-18 14:20:10,509 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 48 transitions. [2022-03-18 14:20:10,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-03-18 14:20:10,510 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 14:20:10,510 INFO L500 BasicCegarLoop]: trace histogram [6, 6, 6, 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] [2022-03-18 14:20:10,535 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-03-18 14:20:10,710 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 14:20:10,711 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 14:20:10,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 14:20:10,711 INFO L85 PathProgramCache]: Analyzing trace with hash 561616070, now seen corresponding path program 1 times [2022-03-18 14:20:10,711 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 14:20:10,712 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1770774399] [2022-03-18 14:20:10,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 14:20:10,712 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 14:20:10,723 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 14:20:10,723 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2084136682] [2022-03-18 14:20:10,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 14:20:10,724 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 14:20:10,724 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 14:20:10,727 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) [2022-03-18 14:20:10,728 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-03-18 14:20:10,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 14:20:10,766 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 14 conjunts are in the unsatisfiable core [2022-03-18 14:20:10,768 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 14:20:10,919 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-03-18 14:20:10,919 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 14:20:11,031 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-03-18 14:20:11,032 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 14:20:11,032 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1770774399] [2022-03-18 14:20:11,032 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 14:20:11,033 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2084136682] [2022-03-18 14:20:11,033 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2084136682] provided 1 perfect and 1 imperfect interpolant sequences [2022-03-18 14:20:11,034 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-03-18 14:20:11,034 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [9] total 10 [2022-03-18 14:20:11,034 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1542412323] [2022-03-18 14:20:11,034 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 14:20:11,034 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-18 14:20:11,035 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 14:20:11,035 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-18 14:20:11,035 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2022-03-18 14:20:11,035 INFO L87 Difference]: Start difference. First operand 37 states and 48 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) [2022-03-18 14:20:11,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 14:20:11,080 INFO L93 Difference]: Finished difference Result 43 states and 53 transitions. [2022-03-18 14:20:11,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-18 14:20:11,081 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) Word has length 45 [2022-03-18 14:20:11,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 14:20:11,083 INFO L225 Difference]: With dead ends: 43 [2022-03-18 14:20:11,083 INFO L226 Difference]: Without dead ends: 41 [2022-03-18 14:20:11,084 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 80 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2022-03-18 14:20:11,086 INFO L912 BasicCegarLoop]: 40 mSDtfsCounter, 6 mSDsluCounter, 106 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 146 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-18 14:20:11,087 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 146 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-18 14:20:11,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2022-03-18 14:20:11,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2022-03-18 14:20:11,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 22 states have (on average 1.1363636363636365) internal successors, (25), 23 states have internal predecessors, (25), 14 states have call successors, (14), 5 states have call predecessors, (14), 4 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2022-03-18 14:20:11,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 51 transitions. [2022-03-18 14:20:11,104 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 51 transitions. Word has length 45 [2022-03-18 14:20:11,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 14:20:11,104 INFO L478 AbstractCegarLoop]: Abstraction has 41 states and 51 transitions. [2022-03-18 14:20:11,105 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) [2022-03-18 14:20:11,105 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 51 transitions. [2022-03-18 14:20:11,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-03-18 14:20:11,106 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 14:20:11,106 INFO L500 BasicCegarLoop]: trace histogram [6, 6, 6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 14:20:11,125 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-03-18 14:20:11,321 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2022-03-18 14:20:11,322 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 14:20:11,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 14:20:11,322 INFO L85 PathProgramCache]: Analyzing trace with hash -680064098, now seen corresponding path program 1 times [2022-03-18 14:20:11,323 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 14:20:11,323 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2109196227] [2022-03-18 14:20:11,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 14:20:11,323 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 14:20:11,338 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 14:20:11,338 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [26313346] [2022-03-18 14:20:11,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 14:20:11,338 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 14:20:11,338 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 14:20:11,341 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) [2022-03-18 14:20:11,379 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-03-18 14:20:11,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 14:20:11,391 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 19 conjunts are in the unsatisfiable core [2022-03-18 14:20:11,400 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 14:20:11,564 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 7 proven. 10 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-03-18 14:20:11,564 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 14:20:11,633 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 14:20:11,633 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2109196227] [2022-03-18 14:20:11,634 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 14:20:11,634 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [26313346] [2022-03-18 14:20:11,634 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [26313346] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 14:20:11,634 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-18 14:20:11,634 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2022-03-18 14:20:11,634 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [120740152] [2022-03-18 14:20:11,634 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-03-18 14:20:11,634 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-18 14:20:11,635 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 14:20:11,635 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-18 14:20:11,635 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2022-03-18 14:20:11,635 INFO L87 Difference]: Start difference. First operand 41 states and 51 transitions. Second operand has 10 states, 10 states have (on average 2.0) internal successors, (20), 8 states have internal predecessors, (20), 3 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2022-03-18 14:20:11,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 14:20:11,789 INFO L93 Difference]: Finished difference Result 54 states and 68 transitions. [2022-03-18 14:20:11,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-18 14:20:11,790 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 8 states have internal predecessors, (20), 3 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) Word has length 50 [2022-03-18 14:20:11,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 14:20:11,792 INFO L225 Difference]: With dead ends: 54 [2022-03-18 14:20:11,795 INFO L226 Difference]: Without dead ends: 52 [2022-03-18 14:20:11,795 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 44 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2022-03-18 14:20:11,801 INFO L912 BasicCegarLoop]: 30 mSDtfsCounter, 26 mSDsluCounter, 164 mSDsCounter, 0 mSdLazyCounter, 199 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 194 SdHoareTripleChecker+Invalid, 207 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 199 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 14:20:11,803 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 194 Invalid, 207 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 199 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 14:20:11,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2022-03-18 14:20:11,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 51. [2022-03-18 14:20:11,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 27 states have (on average 1.1481481481481481) internal successors, (31), 28 states have internal predecessors, (31), 18 states have call successors, (18), 6 states have call predecessors, (18), 5 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2022-03-18 14:20:11,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 65 transitions. [2022-03-18 14:20:11,809 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 65 transitions. Word has length 50 [2022-03-18 14:20:11,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 14:20:11,809 INFO L478 AbstractCegarLoop]: Abstraction has 51 states and 65 transitions. [2022-03-18 14:20:11,810 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 8 states have internal predecessors, (20), 3 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2022-03-18 14:20:11,810 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 65 transitions. [2022-03-18 14:20:11,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-03-18 14:20:11,810 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 14:20:11,810 INFO L500 BasicCegarLoop]: trace histogram [6, 6, 6, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 14:20:11,833 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-03-18 14:20:12,027 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 14:20:12,028 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 14:20:12,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 14:20:12,028 INFO L85 PathProgramCache]: Analyzing trace with hash 606548870, now seen corresponding path program 1 times [2022-03-18 14:20:12,028 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 14:20:12,029 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [25559689] [2022-03-18 14:20:12,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 14:20:12,029 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 14:20:12,038 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 14:20:12,039 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1099068858] [2022-03-18 14:20:12,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 14:20:12,039 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 14:20:12,039 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 14:20:12,040 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) [2022-03-18 14:20:12,041 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-03-18 14:20:12,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 14:20:12,087 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 19 conjunts are in the unsatisfiable core [2022-03-18 14:20:12,089 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 14:20:12,274 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 7 proven. 21 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-03-18 14:20:12,274 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 14:20:12,380 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2022-03-18 14:20:12,380 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 14:20:12,380 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [25559689] [2022-03-18 14:20:12,380 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 14:20:12,380 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1099068858] [2022-03-18 14:20:12,380 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1099068858] provided 1 perfect and 1 imperfect interpolant sequences [2022-03-18 14:20:12,381 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-03-18 14:20:12,381 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [9] total 10 [2022-03-18 14:20:12,381 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1420582706] [2022-03-18 14:20:12,381 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 14:20:12,381 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-18 14:20:12,381 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 14:20:12,381 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-18 14:20:12,382 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2022-03-18 14:20:12,382 INFO L87 Difference]: Start difference. First operand 51 states and 65 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (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) [2022-03-18 14:20:12,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 14:20:12,425 INFO L93 Difference]: Finished difference Result 58 states and 71 transitions. [2022-03-18 14:20:12,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-18 14:20:12,425 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (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 55 [2022-03-18 14:20:12,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 14:20:12,426 INFO L225 Difference]: With dead ends: 58 [2022-03-18 14:20:12,426 INFO L226 Difference]: Without dead ends: 56 [2022-03-18 14:20:12,426 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 100 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2022-03-18 14:20:12,427 INFO L912 BasicCegarLoop]: 46 mSDtfsCounter, 7 mSDsluCounter, 117 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 163 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-18 14:20:12,427 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 163 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-18 14:20:12,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2022-03-18 14:20:12,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 55. [2022-03-18 14:20:12,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 30 states have (on average 1.1333333333333333) internal successors, (34), 31 states have internal predecessors, (34), 18 states have call successors, (18), 7 states have call predecessors, (18), 6 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2022-03-18 14:20:12,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 68 transitions. [2022-03-18 14:20:12,433 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 68 transitions. Word has length 55 [2022-03-18 14:20:12,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 14:20:12,433 INFO L478 AbstractCegarLoop]: Abstraction has 55 states and 68 transitions. [2022-03-18 14:20:12,433 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (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) [2022-03-18 14:20:12,433 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 68 transitions. [2022-03-18 14:20:12,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-03-18 14:20:12,434 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 14:20:12,434 INFO L500 BasicCegarLoop]: trace histogram [6, 6, 6, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 14:20:12,454 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-03-18 14:20:12,649 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 14:20:12,649 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 14:20:12,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 14:20:12,650 INFO L85 PathProgramCache]: Analyzing trace with hash 1584976990, now seen corresponding path program 1 times [2022-03-18 14:20:12,650 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 14:20:12,650 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [111941403] [2022-03-18 14:20:12,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 14:20:12,650 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 14:20:12,658 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 14:20:12,658 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [10840957] [2022-03-18 14:20:12,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 14:20:12,659 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 14:20:12,659 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 14:20:12,660 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) [2022-03-18 14:20:12,661 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-03-18 14:20:12,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 14:20:12,707 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 23 conjunts are in the unsatisfiable core [2022-03-18 14:20:12,709 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 14:20:12,856 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 10 proven. 2 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2022-03-18 14:20:12,856 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 14:20:12,919 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 14:20:12,920 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [111941403] [2022-03-18 14:20:12,920 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 14:20:12,920 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [10840957] [2022-03-18 14:20:12,920 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [10840957] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 14:20:12,920 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-18 14:20:12,920 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2022-03-18 14:20:12,920 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [919726527] [2022-03-18 14:20:12,920 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-03-18 14:20:12,921 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-03-18 14:20:12,921 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 14:20:12,921 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-03-18 14:20:12,921 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2022-03-18 14:20:12,921 INFO L87 Difference]: Start difference. First operand 55 states and 68 transitions. Second operand has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 states have internal predecessors, (20), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2022-03-18 14:20:13,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 14:20:13,008 INFO L93 Difference]: Finished difference Result 62 states and 74 transitions. [2022-03-18 14:20:13,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-18 14:20:13,008 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 states have internal predecessors, (20), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) Word has length 60 [2022-03-18 14:20:13,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 14:20:13,009 INFO L225 Difference]: With dead ends: 62 [2022-03-18 14:20:13,009 INFO L226 Difference]: Without dead ends: 60 [2022-03-18 14:20:13,010 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 56 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2022-03-18 14:20:13,010 INFO L912 BasicCegarLoop]: 36 mSDtfsCounter, 12 mSDsluCounter, 118 mSDsCounter, 0 mSdLazyCounter, 90 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 154 SdHoareTripleChecker+Invalid, 93 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 90 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 14:20:13,010 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 154 Invalid, 93 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 90 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 14:20:13,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2022-03-18 14:20:13,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 59. [2022-03-18 14:20:13,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 33 states have (on average 1.121212121212121) internal successors, (37), 34 states have internal predecessors, (37), 18 states have call successors, (18), 8 states have call predecessors, (18), 7 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2022-03-18 14:20:13,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 71 transitions. [2022-03-18 14:20:13,016 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 71 transitions. Word has length 60 [2022-03-18 14:20:13,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 14:20:13,016 INFO L478 AbstractCegarLoop]: Abstraction has 59 states and 71 transitions. [2022-03-18 14:20:13,025 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 states have internal predecessors, (20), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2022-03-18 14:20:13,027 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 71 transitions. [2022-03-18 14:20:13,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-03-18 14:20:13,031 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 14:20:13,031 INFO L500 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 14:20:13,051 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-03-18 14:20:13,247 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 14:20:13,247 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 14:20:13,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 14:20:13,248 INFO L85 PathProgramCache]: Analyzing trace with hash -1682830289, now seen corresponding path program 1 times [2022-03-18 14:20:13,248 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 14:20:13,248 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [113429636] [2022-03-18 14:20:13,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 14:20:13,248 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 14:20:13,256 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 14:20:13,256 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [324948539] [2022-03-18 14:20:13,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 14:20:13,256 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 14:20:13,256 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 14:20:13,258 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) [2022-03-18 14:20:13,264 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-03-18 14:20:13,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 14:20:13,307 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-18 14:20:13,308 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 14:20:13,413 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 14 proven. 11 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2022-03-18 14:20:13,414 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 14:20:13,521 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 14 proven. 11 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2022-03-18 14:20:13,522 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 14:20:13,522 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [113429636] [2022-03-18 14:20:13,522 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 14:20:13,522 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [324948539] [2022-03-18 14:20:13,522 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [324948539] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 14:20:13,522 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 14:20:13,522 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2022-03-18 14:20:13,523 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1045268504] [2022-03-18 14:20:13,523 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-18 14:20:13,524 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-18 14:20:13,524 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 14:20:13,524 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-18 14:20:13,524 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2022-03-18 14:20:13,524 INFO L87 Difference]: Start difference. First operand 59 states and 71 transitions. Second operand has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 8 states have internal predecessors, (26), 5 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) [2022-03-18 14:20:13,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 14:20:13,640 INFO L93 Difference]: Finished difference Result 106 states and 146 transitions. [2022-03-18 14:20:13,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-18 14:20:13,640 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 8 states have internal predecessors, (26), 5 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) Word has length 69 [2022-03-18 14:20:13,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 14:20:13,642 INFO L225 Difference]: With dead ends: 106 [2022-03-18 14:20:13,642 INFO L226 Difference]: Without dead ends: 98 [2022-03-18 14:20:13,643 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 129 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2022-03-18 14:20:13,643 INFO L912 BasicCegarLoop]: 60 mSDtfsCounter, 30 mSDsluCounter, 273 mSDsCounter, 0 mSdLazyCounter, 100 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 333 SdHoareTripleChecker+Invalid, 153 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 100 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 14:20:13,644 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [35 Valid, 333 Invalid, 153 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 100 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 14:20:13,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2022-03-18 14:20:13,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 89. [2022-03-18 14:20:13,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 47 states have (on average 1.1914893617021276) internal successors, (56), 48 states have internal predecessors, (56), 34 states have call successors, (34), 8 states have call predecessors, (34), 7 states have return successors, (32), 32 states have call predecessors, (32), 32 states have call successors, (32) [2022-03-18 14:20:13,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 122 transitions. [2022-03-18 14:20:13,665 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 122 transitions. Word has length 69 [2022-03-18 14:20:13,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 14:20:13,665 INFO L478 AbstractCegarLoop]: Abstraction has 89 states and 122 transitions. [2022-03-18 14:20:13,665 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 8 states have internal predecessors, (26), 5 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) [2022-03-18 14:20:13,666 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 122 transitions. [2022-03-18 14:20:13,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2022-03-18 14:20:13,668 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 14:20:13,668 INFO L500 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 14:20:13,692 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-03-18 14:20:13,890 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 14:20:13,890 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 14:20:13,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 14:20:13,891 INFO L85 PathProgramCache]: Analyzing trace with hash 376741854, now seen corresponding path program 1 times [2022-03-18 14:20:13,891 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 14:20:13,891 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1315441705] [2022-03-18 14:20:13,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 14:20:13,891 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 14:20:13,899 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 14:20:13,899 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [933769585] [2022-03-18 14:20:13,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 14:20:13,900 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 14:20:13,900 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 14:20:13,901 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) [2022-03-18 14:20:13,902 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-03-18 14:20:13,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 14:20:13,942 INFO L263 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-18 14:20:13,944 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 14:20:14,109 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 15 proven. 12 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2022-03-18 14:20:14,109 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 14:20:14,261 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 20 proven. 7 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2022-03-18 14:20:14,262 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 14:20:14,262 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1315441705] [2022-03-18 14:20:14,262 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 14:20:14,262 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [933769585] [2022-03-18 14:20:14,262 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [933769585] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 14:20:14,262 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 14:20:14,262 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 12 [2022-03-18 14:20:14,262 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [499712483] [2022-03-18 14:20:14,262 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-18 14:20:14,263 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-18 14:20:14,263 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 14:20:14,263 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-18 14:20:14,263 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2022-03-18 14:20:14,264 INFO L87 Difference]: Start difference. First operand 89 states and 122 transitions. Second operand has 12 states, 12 states have (on average 3.0) internal successors, (36), 11 states have internal predecessors, (36), 6 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (19), 6 states have call predecessors, (19), 6 states have call successors, (19) [2022-03-18 14:20:14,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 14:20:14,473 INFO L93 Difference]: Finished difference Result 132 states and 187 transitions. [2022-03-18 14:20:14,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-18 14:20:14,474 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0) internal successors, (36), 11 states have internal predecessors, (36), 6 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (19), 6 states have call predecessors, (19), 6 states have call successors, (19) Word has length 75 [2022-03-18 14:20:14,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 14:20:14,476 INFO L225 Difference]: With dead ends: 132 [2022-03-18 14:20:14,476 INFO L226 Difference]: Without dead ends: 128 [2022-03-18 14:20:14,476 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 141 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2022-03-18 14:20:14,477 INFO L912 BasicCegarLoop]: 46 mSDtfsCounter, 26 mSDsluCounter, 351 mSDsCounter, 0 mSdLazyCounter, 315 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 397 SdHoareTripleChecker+Invalid, 346 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 315 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-18 14:20:14,477 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [32 Valid, 397 Invalid, 346 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 315 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-18 14:20:14,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2022-03-18 14:20:14,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 96. [2022-03-18 14:20:14,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 51 states have (on average 1.1764705882352942) internal successors, (60), 53 states have internal predecessors, (60), 36 states have call successors, (36), 9 states have call predecessors, (36), 8 states have return successors, (34), 33 states have call predecessors, (34), 34 states have call successors, (34) [2022-03-18 14:20:14,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 130 transitions. [2022-03-18 14:20:14,489 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 130 transitions. Word has length 75 [2022-03-18 14:20:14,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 14:20:14,489 INFO L478 AbstractCegarLoop]: Abstraction has 96 states and 130 transitions. [2022-03-18 14:20:14,489 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.0) internal successors, (36), 11 states have internal predecessors, (36), 6 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (19), 6 states have call predecessors, (19), 6 states have call successors, (19) [2022-03-18 14:20:14,490 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 130 transitions. [2022-03-18 14:20:14,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-03-18 14:20:14,490 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 14:20:14,490 INFO L500 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 14:20:14,509 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-03-18 14:20:14,703 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 14:20:14,703 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 14:20:14,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 14:20:14,704 INFO L85 PathProgramCache]: Analyzing trace with hash -1245952186, now seen corresponding path program 2 times [2022-03-18 14:20:14,704 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 14:20:14,704 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [773198507] [2022-03-18 14:20:14,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 14:20:14,704 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 14:20:14,712 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 14:20:14,712 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [443763070] [2022-03-18 14:20:14,712 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 14:20:14,712 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 14:20:14,712 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 14:20:14,713 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) [2022-03-18 14:20:14,724 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-03-18 14:20:14,766 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 14:20:14,766 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 14:20:14,767 INFO L263 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-18 14:20:14,769 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 14:20:15,144 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 15 proven. 18 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2022-03-18 14:20:15,144 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 14:20:15,301 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 12 proven. 6 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2022-03-18 14:20:15,301 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 14:20:15,301 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [773198507] [2022-03-18 14:20:15,301 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 14:20:15,301 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [443763070] [2022-03-18 14:20:15,301 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [443763070] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 14:20:15,301 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 14:20:15,301 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 7] total 13 [2022-03-18 14:20:15,302 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1757836766] [2022-03-18 14:20:15,302 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-18 14:20:15,302 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-18 14:20:15,302 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 14:20:15,302 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-18 14:20:15,302 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2022-03-18 14:20:15,302 INFO L87 Difference]: Start difference. First operand 96 states and 130 transitions. Second operand has 13 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 11 states have internal predecessors, (34), 8 states have call successors, (26), 2 states have call predecessors, (26), 2 states have return successors, (24), 8 states have call predecessors, (24), 8 states have call successors, (24) [2022-03-18 14:20:16,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 14:20:16,653 INFO L93 Difference]: Finished difference Result 128 states and 169 transitions. [2022-03-18 14:20:16,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-18 14:20:16,654 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 11 states have internal predecessors, (34), 8 states have call successors, (26), 2 states have call predecessors, (26), 2 states have return successors, (24), 8 states have call predecessors, (24), 8 states have call successors, (24) Word has length 80 [2022-03-18 14:20:16,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 14:20:16,655 INFO L225 Difference]: With dead ends: 128 [2022-03-18 14:20:16,655 INFO L226 Difference]: Without dead ends: 126 [2022-03-18 14:20:16,655 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 147 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=88, Invalid=332, Unknown=0, NotChecked=0, Total=420 [2022-03-18 14:20:16,655 INFO L912 BasicCegarLoop]: 39 mSDtfsCounter, 40 mSDsluCounter, 266 mSDsCounter, 0 mSdLazyCounter, 257 mSolverCounterSat, 73 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 305 SdHoareTripleChecker+Invalid, 330 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 73 IncrementalHoareTripleChecker+Valid, 257 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-03-18 14:20:16,656 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [40 Valid, 305 Invalid, 330 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [73 Valid, 257 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-03-18 14:20:16,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2022-03-18 14:20:16,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 108. [2022-03-18 14:20:16,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 60 states have (on average 1.15) internal successors, (69), 62 states have internal predecessors, (69), 36 states have call successors, (36), 12 states have call predecessors, (36), 11 states have return successors, (34), 33 states have call predecessors, (34), 34 states have call successors, (34) [2022-03-18 14:20:16,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 139 transitions. [2022-03-18 14:20:16,668 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 139 transitions. Word has length 80 [2022-03-18 14:20:16,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 14:20:16,668 INFO L478 AbstractCegarLoop]: Abstraction has 108 states and 139 transitions. [2022-03-18 14:20:16,668 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 11 states have internal predecessors, (34), 8 states have call successors, (26), 2 states have call predecessors, (26), 2 states have return successors, (24), 8 states have call predecessors, (24), 8 states have call successors, (24) [2022-03-18 14:20:16,668 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 139 transitions. [2022-03-18 14:20:16,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2022-03-18 14:20:16,669 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 14:20:16,669 INFO L500 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 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, 1] [2022-03-18 14:20:16,688 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-03-18 14:20:16,885 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,SelfDestructingSolverStorable8 [2022-03-18 14:20:16,886 INFO L403 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 14:20:16,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 14:20:16,886 INFO L85 PathProgramCache]: Analyzing trace with hash 901388446, now seen corresponding path program 3 times [2022-03-18 14:20:16,886 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 14:20:16,887 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [86007904] [2022-03-18 14:20:16,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 14:20:16,887 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 14:20:16,900 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 14:20:16,900 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [125016002] [2022-03-18 14:20:16,900 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-18 14:20:16,900 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 14:20:16,900 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 14:20:16,902 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) [2022-03-18 14:20:16,903 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-03-18 14:20:16,951 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-18 14:20:16,952 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 14:20:16,953 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 36 conjunts are in the unsatisfiable core [2022-03-18 14:20:16,954 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 14:20:17,288 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 31 proven. 8 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2022-03-18 14:20:17,288 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 14:20:17,370 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 14:20:17,371 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [86007904] [2022-03-18 14:20:17,371 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 14:20:17,371 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [125016002] [2022-03-18 14:20:17,371 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [125016002] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 14:20:17,371 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-18 14:20:17,371 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2022-03-18 14:20:17,371 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [130279296] [2022-03-18 14:20:17,371 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-03-18 14:20:17,372 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-18 14:20:17,372 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 14:20:17,373 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-18 14:20:17,373 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2022-03-18 14:20:17,373 INFO L87 Difference]: Start difference. First operand 108 states and 139 transitions. Second operand has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 8 states have internal predecessors, (25), 4 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 4 states have call predecessors, (14), 4 states have call successors, (14) [2022-03-18 14:20:17,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 14:20:17,599 INFO L93 Difference]: Finished difference Result 144 states and 181 transitions. [2022-03-18 14:20:17,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-18 14:20:17,607 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 8 states have internal predecessors, (25), 4 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 4 states have call predecessors, (14), 4 states have call successors, (14) Word has length 85 [2022-03-18 14:20:17,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 14:20:17,609 INFO L225 Difference]: With dead ends: 144 [2022-03-18 14:20:17,609 INFO L226 Difference]: Without dead ends: 142 [2022-03-18 14:20:17,610 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 79 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2022-03-18 14:20:17,610 INFO L912 BasicCegarLoop]: 39 mSDtfsCounter, 20 mSDsluCounter, 194 mSDsCounter, 0 mSdLazyCounter, 191 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 233 SdHoareTripleChecker+Invalid, 205 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 191 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-18 14:20:17,611 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [25 Valid, 233 Invalid, 205 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 191 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-18 14:20:17,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2022-03-18 14:20:17,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 139. [2022-03-18 14:20:17,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139 states, 79 states have (on average 1.139240506329114) internal successors, (90), 81 states have internal predecessors, (90), 44 states have call successors, (44), 16 states have call predecessors, (44), 15 states have return successors, (42), 41 states have call predecessors, (42), 42 states have call successors, (42) [2022-03-18 14:20:17,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 176 transitions. [2022-03-18 14:20:17,632 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 176 transitions. Word has length 85 [2022-03-18 14:20:17,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 14:20:17,633 INFO L478 AbstractCegarLoop]: Abstraction has 139 states and 176 transitions. [2022-03-18 14:20:17,633 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 8 states have internal predecessors, (25), 4 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 4 states have call predecessors, (14), 4 states have call successors, (14) [2022-03-18 14:20:17,633 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 176 transitions. [2022-03-18 14:20:17,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2022-03-18 14:20:17,634 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 14:20:17,634 INFO L500 BasicCegarLoop]: trace histogram [9, 8, 8, 6, 6, 6, 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, 1, 1, 1, 1] [2022-03-18 14:20:17,650 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2022-03-18 14:20:17,839 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-03-18 14:20:17,839 INFO L403 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 14:20:17,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 14:20:17,840 INFO L85 PathProgramCache]: Analyzing trace with hash -686534738, now seen corresponding path program 1 times [2022-03-18 14:20:17,840 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 14:20:17,840 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1377223299] [2022-03-18 14:20:17,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 14:20:17,840 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 14:20:17,847 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 14:20:17,847 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1380324693] [2022-03-18 14:20:17,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 14:20:17,847 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 14:20:17,847 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 14:20:17,848 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) [2022-03-18 14:20:17,852 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-03-18 14:20:17,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 14:20:17,888 INFO L263 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 37 conjunts are in the unsatisfiable core [2022-03-18 14:20:17,890 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 14:20:18,309 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 16 proven. 8 refuted. 0 times theorem prover too weak. 172 trivial. 0 not checked. [2022-03-18 14:20:18,310 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 14:20:18,603 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 16 proven. 8 refuted. 0 times theorem prover too weak. 172 trivial. 0 not checked. [2022-03-18 14:20:18,603 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 14:20:18,603 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1377223299] [2022-03-18 14:20:18,603 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 14:20:18,603 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1380324693] [2022-03-18 14:20:18,603 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1380324693] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 14:20:18,603 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 14:20:18,603 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2022-03-18 14:20:18,603 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1415213598] [2022-03-18 14:20:18,604 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-18 14:20:18,604 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-18 14:20:18,604 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 14:20:18,604 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-18 14:20:18,604 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2022-03-18 14:20:18,604 INFO L87 Difference]: Start difference. First operand 139 states and 176 transitions. Second operand has 14 states, 12 states have (on average 2.75) internal successors, (33), 13 states have internal predecessors, (33), 9 states have call successors, (28), 2 states have call predecessors, (28), 1 states have return successors, (25), 7 states have call predecessors, (25), 7 states have call successors, (25) [2022-03-18 14:20:20,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 14:20:20,046 INFO L93 Difference]: Finished difference Result 228 states and 311 transitions. [2022-03-18 14:20:20,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-03-18 14:20:20,046 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 12 states have (on average 2.75) internal successors, (33), 13 states have internal predecessors, (33), 9 states have call successors, (28), 2 states have call predecessors, (28), 1 states have return successors, (25), 7 states have call predecessors, (25), 7 states have call successors, (25) Word has length 91 [2022-03-18 14:20:20,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 14:20:20,047 INFO L225 Difference]: With dead ends: 228 [2022-03-18 14:20:20,047 INFO L226 Difference]: Without dead ends: 220 [2022-03-18 14:20:20,048 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 197 GetRequests, 168 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=178, Invalid=692, Unknown=0, NotChecked=0, Total=870 [2022-03-18 14:20:20,048 INFO L912 BasicCegarLoop]: 78 mSDtfsCounter, 53 mSDsluCounter, 362 mSDsCounter, 0 mSdLazyCounter, 435 mSolverCounterSat, 133 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 440 SdHoareTripleChecker+Invalid, 568 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 133 IncrementalHoareTripleChecker+Valid, 435 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-03-18 14:20:20,049 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [57 Valid, 440 Invalid, 568 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [133 Valid, 435 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-03-18 14:20:20,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2022-03-18 14:20:20,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 216. [2022-03-18 14:20:20,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 216 states, 116 states have (on average 1.1810344827586208) internal successors, (137), 117 states have internal predecessors, (137), 81 states have call successors, (81), 19 states have call predecessors, (81), 18 states have return successors, (79), 79 states have call predecessors, (79), 79 states have call successors, (79) [2022-03-18 14:20:20,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 297 transitions. [2022-03-18 14:20:20,098 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 297 transitions. Word has length 91 [2022-03-18 14:20:20,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 14:20:20,098 INFO L478 AbstractCegarLoop]: Abstraction has 216 states and 297 transitions. [2022-03-18 14:20:20,098 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 12 states have (on average 2.75) internal successors, (33), 13 states have internal predecessors, (33), 9 states have call successors, (28), 2 states have call predecessors, (28), 1 states have return successors, (25), 7 states have call predecessors, (25), 7 states have call successors, (25) [2022-03-18 14:20:20,098 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 297 transitions. [2022-03-18 14:20:20,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2022-03-18 14:20:20,100 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 14:20:20,100 INFO L500 BasicCegarLoop]: trace histogram [12, 11, 11, 6, 6, 6, 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, 1, 1, 1, 1, 1, 1] [2022-03-18 14:20:20,135 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-03-18 14:20:20,317 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,SelfDestructingSolverStorable10 [2022-03-18 14:20:20,317 INFO L403 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 14:20:20,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 14:20:20,317 INFO L85 PathProgramCache]: Analyzing trace with hash -428114403, now seen corresponding path program 1 times [2022-03-18 14:20:20,318 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 14:20:20,318 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1424942233] [2022-03-18 14:20:20,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 14:20:20,318 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 14:20:20,325 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 14:20:20,325 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [918677953] [2022-03-18 14:20:20,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 14:20:20,325 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 14:20:20,325 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 14:20:20,326 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) [2022-03-18 14:20:20,327 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-03-18 14:20:20,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 14:20:20,390 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 54 conjunts are in the unsatisfiable core [2022-03-18 14:20:20,392 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 14:20:21,031 INFO L134 CoverageAnalysis]: Checked inductivity of 320 backedges. 79 proven. 33 refuted. 0 times theorem prover too weak. 208 trivial. 0 not checked. [2022-03-18 14:20:21,031 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 14:20:32,854 INFO L134 CoverageAnalysis]: Checked inductivity of 320 backedges. 79 proven. 27 refuted. 6 times theorem prover too weak. 208 trivial. 0 not checked. [2022-03-18 14:20:32,854 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 14:20:32,854 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1424942233] [2022-03-18 14:20:32,855 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 14:20:32,855 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [918677953] [2022-03-18 14:20:32,855 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [918677953] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 14:20:32,855 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 14:20:32,855 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 19 [2022-03-18 14:20:32,855 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1617420219] [2022-03-18 14:20:32,855 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-18 14:20:32,855 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-18 14:20:32,855 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 14:20:32,856 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-18 14:20:32,856 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=260, Unknown=4, NotChecked=0, Total=342 [2022-03-18 14:20:32,856 INFO L87 Difference]: Start difference. First operand 216 states and 297 transitions. Second operand has 19 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 16 states have internal predecessors, (40), 11 states have call successors, (34), 2 states have call predecessors, (34), 2 states have return successors, (31), 13 states have call predecessors, (31), 10 states have call successors, (31) [2022-03-18 14:21:06,706 WARN L232 SmtUtils]: Spent 32.62s on a formula simplification. DAG size of input: 85 DAG size of output: 84 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-18 14:21:08,717 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 [] [2022-03-18 14:21:12,901 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-18 14:21:15,072 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-18 14:21:17,087 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-18 14:21:19,119 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-18 14:21:21,121 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-18 14:21:25,232 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-18 14:21:27,560 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-18 14:21:29,969 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-18 14:22:08,064 WARN L232 SmtUtils]: Spent 32.84s on a formula simplification. DAG size of input: 63 DAG size of output: 62 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-18 14:22:10,270 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-18 14:22:12,337 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-18 14:22:27,087 WARN L232 SmtUtils]: Spent 12.30s on a formula simplification. DAG size of input: 63 DAG size of output: 38 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-18 14:22:29,459 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-18 14:22:31,471 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-18 14:22:33,751 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-18 14:22:35,232 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.48s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-18 14:23:18,751 WARN L232 SmtUtils]: Spent 41.09s on a formula simplification. DAG size of input: 86 DAG size of output: 85 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-18 14:23:21,881 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-18 14:23:22,973 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.01s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-18 14:23:25,386 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.27s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-18 14:23:27,666 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-18 14:23:29,669 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-18 14:23:36,765 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-18 14:23:38,782 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-18 14:24:06,018 WARN L232 SmtUtils]: Spent 26.66s on a formula simplification. DAG size of input: 86 DAG size of output: 85 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-18 14:24:40,658 WARN L232 SmtUtils]: Spent 32.28s on a formula simplification. DAG size of input: 85 DAG size of output: 84 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-18 14:24:42,681 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-18 14:24:44,684 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-18 14:24:46,688 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-18 14:24:46,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 14:24:46,813 INFO L93 Difference]: Finished difference Result 297 states and 416 transitions. [2022-03-18 14:24:46,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-03-18 14:24:46,813 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 16 states have internal predecessors, (40), 11 states have call successors, (34), 2 states have call predecessors, (34), 2 states have return successors, (31), 13 states have call predecessors, (31), 10 states have call successors, (31) Word has length 107 [2022-03-18 14:24:46,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 14:24:46,816 INFO L225 Difference]: With dead ends: 297 [2022-03-18 14:24:46,816 INFO L226 Difference]: Without dead ends: 295 [2022-03-18 14:24:46,817 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 228 GetRequests, 195 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 208.0s TimeCoverageRelationStatistics Valid=269, Invalid=775, Unknown=12, NotChecked=0, Total=1056 [2022-03-18 14:24:46,817 INFO L912 BasicCegarLoop]: 44 mSDtfsCounter, 69 mSDsluCounter, 412 mSDsCounter, 0 mSdLazyCounter, 590 mSolverCounterSat, 133 mSolverCounterUnsat, 22 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 55.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 456 SdHoareTripleChecker+Invalid, 745 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 133 IncrementalHoareTripleChecker+Valid, 590 IncrementalHoareTripleChecker+Invalid, 22 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 55.1s IncrementalHoareTripleChecker+Time [2022-03-18 14:24:46,817 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [77 Valid, 456 Invalid, 745 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [133 Valid, 590 Invalid, 22 Unknown, 0 Unchecked, 55.1s Time] [2022-03-18 14:24:46,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 295 states. [2022-03-18 14:24:46,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 295 to 277. [2022-03-18 14:24:46,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 277 states, 148 states have (on average 1.2027027027027026) internal successors, (178), 149 states have internal predecessors, (178), 109 states have call successors, (109), 20 states have call predecessors, (109), 19 states have return successors, (107), 107 states have call predecessors, (107), 107 states have call successors, (107) [2022-03-18 14:24:46,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 277 states to 277 states and 394 transitions. [2022-03-18 14:24:46,876 INFO L78 Accepts]: Start accepts. Automaton has 277 states and 394 transitions. Word has length 107 [2022-03-18 14:24:46,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 14:24:46,876 INFO L478 AbstractCegarLoop]: Abstraction has 277 states and 394 transitions. [2022-03-18 14:24:46,877 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 16 states have internal predecessors, (40), 11 states have call successors, (34), 2 states have call predecessors, (34), 2 states have return successors, (31), 13 states have call predecessors, (31), 10 states have call successors, (31) [2022-03-18 14:24:46,877 INFO L276 IsEmpty]: Start isEmpty. Operand 277 states and 394 transitions. [2022-03-18 14:24:46,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2022-03-18 14:24:46,878 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 14:24:46,878 INFO L500 BasicCegarLoop]: trace histogram [12, 11, 11, 6, 6, 6, 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, 1, 1, 1] [2022-03-18 14:24:46,895 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-03-18 14:24:47,087 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,SelfDestructingSolverStorable11 [2022-03-18 14:24:47,087 INFO L403 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 14:24:47,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 14:24:47,088 INFO L85 PathProgramCache]: Analyzing trace with hash -1979573154, now seen corresponding path program 4 times [2022-03-18 14:24:47,088 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 14:24:47,088 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1807208671] [2022-03-18 14:24:47,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 14:24:47,088 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 14:24:47,101 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 14:24:47,102 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [828131999] [2022-03-18 14:24:47,102 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-18 14:24:47,102 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 14:24:47,102 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 14:24:47,108 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 14:24:47,108 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-03-18 14:24:47,151 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-18 14:24:47,151 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 14:24:47,152 INFO L263 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 5 conjunts are in the unsatisfiable core [2022-03-18 14:24:47,153 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 14:24:47,308 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 135 proven. 0 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2022-03-18 14:24:47,308 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-18 14:24:47,308 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 14:24:47,308 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1807208671] [2022-03-18 14:24:47,308 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 14:24:47,308 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [828131999] [2022-03-18 14:24:47,308 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [828131999] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 14:24:47,308 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 14:24:47,309 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-18 14:24:47,309 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1482350583] [2022-03-18 14:24:47,309 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 14:24:47,309 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-18 14:24:47,309 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 14:24:47,309 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-18 14:24:47,309 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-18 14:24:47,309 INFO L87 Difference]: Start difference. First operand 277 states and 394 transitions. Second operand has 5 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 3 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (18), 3 states have call predecessors, (18), 3 states have call successors, (18) [2022-03-18 14:24:47,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 14:24:47,382 INFO L93 Difference]: Finished difference Result 342 states and 475 transitions. [2022-03-18 14:24:47,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-18 14:24:47,382 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 3 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (18), 3 states have call predecessors, (18), 3 states have call successors, (18) Word has length 110 [2022-03-18 14:24:47,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 14:24:47,383 INFO L225 Difference]: With dead ends: 342 [2022-03-18 14:24:47,383 INFO L226 Difference]: Without dead ends: 199 [2022-03-18 14:24:47,384 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 106 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-03-18 14:24:47,384 INFO L912 BasicCegarLoop]: 56 mSDtfsCounter, 6 mSDsluCounter, 127 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 183 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-18 14:24:47,384 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 183 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-18 14:24:47,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2022-03-18 14:24:47,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 123. [2022-03-18 14:24:47,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 68 states have (on average 1.1176470588235294) internal successors, (76), 68 states have internal predecessors, (76), 41 states have call successors, (41), 15 states have call predecessors, (41), 13 states have return successors, (39), 39 states have call predecessors, (39), 39 states have call successors, (39) [2022-03-18 14:24:47,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 156 transitions. [2022-03-18 14:24:47,415 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 156 transitions. Word has length 110 [2022-03-18 14:24:47,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 14:24:47,415 INFO L478 AbstractCegarLoop]: Abstraction has 123 states and 156 transitions. [2022-03-18 14:24:47,415 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 3 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (18), 3 states have call predecessors, (18), 3 states have call successors, (18) [2022-03-18 14:24:47,415 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 156 transitions. [2022-03-18 14:24:47,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2022-03-18 14:24:47,416 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 14:24:47,416 INFO L500 BasicCegarLoop]: trace histogram [17, 16, 16, 6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 14:24:47,435 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-03-18 14:24:47,631 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-03-18 14:24:47,631 INFO L403 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 14:24:47,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 14:24:47,632 INFO L85 PathProgramCache]: Analyzing trace with hash -896647763, now seen corresponding path program 2 times [2022-03-18 14:24:47,632 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 14:24:47,632 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [369774125] [2022-03-18 14:24:47,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 14:24:47,632 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 14:24:47,648 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 14:24:47,649 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [494322313] [2022-03-18 14:24:47,649 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 14:24:47,649 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 14:24:47,649 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 14:24:47,657 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 14:24:47,657 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-03-18 14:24:47,708 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 14:24:47,708 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 14:24:47,709 INFO L263 TraceCheckSpWp]: Trace formula consists of 333 conjuncts, 67 conjunts are in the unsatisfiable core [2022-03-18 14:24:47,711 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 14:24:49,276 INFO L134 CoverageAnalysis]: Checked inductivity of 615 backedges. 69 proven. 90 refuted. 0 times theorem prover too weak. 456 trivial. 0 not checked. [2022-03-18 14:24:49,276 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 14:24:50,066 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-18 14:24:50,068 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-18 14:25:01,216 INFO L134 CoverageAnalysis]: Checked inductivity of 615 backedges. 69 proven. 90 refuted. 0 times theorem prover too weak. 456 trivial. 0 not checked. [2022-03-18 14:25:01,216 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 14:25:01,216 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [369774125] [2022-03-18 14:25:01,216 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 14:25:01,216 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [494322313] [2022-03-18 14:25:01,216 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [494322313] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 14:25:01,216 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 14:25:01,216 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 29 [2022-03-18 14:25:01,217 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1170716979] [2022-03-18 14:25:01,217 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-18 14:25:01,217 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-03-18 14:25:01,217 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 14:25:01,217 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-03-18 14:25:01,218 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=674, Unknown=3, NotChecked=0, Total=812 [2022-03-18 14:25:01,218 INFO L87 Difference]: Start difference. First operand 123 states and 156 transitions. Second operand has 29 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 26 states have internal predecessors, (52), 16 states have call successors, (44), 2 states have call predecessors, (44), 2 states have return successors, (41), 12 states have call predecessors, (41), 14 states have call successors, (41) [2022-03-18 14:25:11,442 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-18 14:25:20,266 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-18 14:25:26,182 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.07s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-18 14:25:28,300 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-18 14:25:44,497 WARN L232 SmtUtils]: Spent 15.40s on a formula simplification. DAG size of input: 117 DAG size of output: 115 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-18 14:26:01,771 WARN L232 SmtUtils]: Spent 14.50s on a formula simplification. DAG size of input: 103 DAG size of output: 101 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-18 14:26:03,973 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-18 14:26:06,417 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-18 14:26:08,491 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-18 14:26:11,990 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-18 14:26:36,519 WARN L232 SmtUtils]: Spent 14.57s on a formula simplification that was a NOOP. DAG size: 74 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-18 14:26:40,206 WARN L855 $PredicateComparison]: unable to prove that (let ((.cse1 (div c_main_~a~0 c_main_~b~0))) (let ((.cse11 (* .cse1 c_main_~b~0)) (.cse17 (* c_main_~q~0 c_main_~x~0))) (let ((.cse12 (= c_main_~c~0 0)) (.cse13 (+ c_main_~r~0 (* (- 1) (* c_main_~s~0 c_main_~k~0)))) (.cse14 (+ c_main_~p~0 (* (- 1) c_main_~q~0 c_main_~k~0))) (.cse9 (+ .cse17 (* c_main_~s~0 c_main_~y~0))) (.cse2 (= c_main_~b~0 0)) (.cse6 (* (- 1) .cse1 c_main_~b~0)) (.cse7 (+ (* (- 1) c_main_~b~0) c_main_~c~0)) (.cse3 (<= (+ .cse11 c_main_~b~0) c_main_~a~0)) (.cse4 (= (+ (* (+ (* (- 1) (* .cse1 c_main_~s~0)) c_main_~r~0) c_main_~y~0) (* c_main_~x~0 (+ (* (- 1) .cse1 c_main_~q~0) c_main_~p~0))) 0)) (.cse5 (not (= (mod c_main_~a~0 c_main_~b~0) 0))) (.cse0 (+ .cse17 c_main_~y~0))) (and (< .cse0 c_main_~x~0) (or (not (<= (+ c_main_~k~0 1) .cse1)) .cse2 .cse3 .cse4 .cse5 (not (= (+ .cse6 c_main_~a~0) .cse7))) (let ((.cse10 (div c_main_~b~0 c_main_~a~0))) (let ((.cse8 (* c_main_~a~0 .cse10))) (or (<= (+ .cse8 c_main_~a~0) c_main_~b~0) (not (= (* 2 c_main_~a~0) .cse8)) (= .cse9 (+ (* c_main_~r~0 c_main_~y~0 .cse10) (* c_main_~p~0 c_main_~x~0 .cse10))) (not (= (mod c_main_~b~0 c_main_~a~0) 0)) (not (= c_main_~b~0 .cse9)) (= c_main_~a~0 0)))) (or .cse2 .cse3 .cse5 (= (+ (* c_main_~p~0 c_main_~x~0) (* c_main_~r~0 c_main_~y~0)) (+ (* .cse1 c_main_~s~0 c_main_~y~0) (* .cse1 c_main_~q~0 c_main_~x~0))) (not (= (* c_main_~b~0 2) .cse11))) (= c_main_~s~0 1) (or (not .cse12) (not (= (+ (* c_main_~b~0 c_main_~k~0) c_main_~c~0) c_main_~a~0)) (= (+ (* .cse13 c_main_~y~0) (* .cse14 c_main_~x~0)) 0) (<= c_main_~b~0 c_main_~c~0)) (let ((.cse16 (div c_main_~b~0 c_main_~c~0))) (let ((.cse15 (* .cse16 c_main_~c~0))) (or .cse12 (not (= (* 2 c_main_~c~0) .cse15)) (<= (+ c_main_~c~0 .cse15) c_main_~b~0) (not (= 0 (mod c_main_~b~0 c_main_~c~0))) (= (+ (* .cse16 .cse13 c_main_~y~0) (* .cse16 .cse14 c_main_~x~0)) .cse9)))) (or .cse2 (< .cse1 (+ 2 c_main_~k~0)) (not (= (+ c_main_~b~0 .cse6 c_main_~a~0) .cse7)) .cse3 .cse4 .cse5) (< c_main_~x~0 c_main_~y~0) (= .cse0 c_main_~b~0) (= (* (* (- 1) c_main_~q~0) c_main_~x~0) (* 2 c_main_~x~0)))))) is different from true [2022-03-18 14:26:42,475 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 [] [2022-03-18 14:27:10,846 WARN L232 SmtUtils]: Spent 16.07s on a formula simplification that was a NOOP. DAG size: 58 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-18 14:27:13,972 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-18 14:27:23,212 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-18 14:27:26,761 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 [] [2022-03-18 14:27:44,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 14:27:44,477 INFO L93 Difference]: Finished difference Result 238 states and 322 transitions. [2022-03-18 14:27:44,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-03-18 14:27:44,477 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 26 states have internal predecessors, (52), 16 states have call successors, (44), 2 states have call predecessors, (44), 2 states have return successors, (41), 12 states have call predecessors, (41), 14 states have call successors, (41) Word has length 138 [2022-03-18 14:27:44,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 14:27:44,478 INFO L225 Difference]: With dead ends: 238 [2022-03-18 14:27:44,479 INFO L226 Difference]: Without dead ends: 232 [2022-03-18 14:27:44,481 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 315 GetRequests, 247 SyntacticMatches, 2 SemanticMatches, 66 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 1211 ImplicationChecksByTransitivity, 136.9s TimeCoverageRelationStatistics Valid=907, Invalid=3499, Unknown=20, NotChecked=130, Total=4556 [2022-03-18 14:27:44,481 INFO L912 BasicCegarLoop]: 54 mSDtfsCounter, 171 mSDsluCounter, 619 mSDsCounter, 0 mSdLazyCounter, 1108 mSolverCounterSat, 405 mSolverCounterUnsat, 12 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 36.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 176 SdHoareTripleChecker+Valid, 673 SdHoareTripleChecker+Invalid, 1527 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 405 IncrementalHoareTripleChecker+Valid, 1108 IncrementalHoareTripleChecker+Invalid, 12 IncrementalHoareTripleChecker+Unknown, 2 IncrementalHoareTripleChecker+Unchecked, 36.8s IncrementalHoareTripleChecker+Time [2022-03-18 14:27:44,482 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [176 Valid, 673 Invalid, 1527 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [405 Valid, 1108 Invalid, 12 Unknown, 2 Unchecked, 36.8s Time] [2022-03-18 14:27:44,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232 states. [2022-03-18 14:27:44,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232 to 147. [2022-03-18 14:27:44,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147 states, 85 states have (on average 1.0823529411764705) internal successors, (92), 85 states have internal predecessors, (92), 45 states have call successors, (45), 18 states have call predecessors, (45), 16 states have return successors, (43), 43 states have call predecessors, (43), 43 states have call successors, (43) [2022-03-18 14:27:44,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 180 transitions. [2022-03-18 14:27:44,526 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 180 transitions. Word has length 138 [2022-03-18 14:27:44,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 14:27:44,526 INFO L478 AbstractCegarLoop]: Abstraction has 147 states and 180 transitions. [2022-03-18 14:27:44,527 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 26 states have internal predecessors, (52), 16 states have call successors, (44), 2 states have call predecessors, (44), 2 states have return successors, (41), 12 states have call predecessors, (41), 14 states have call successors, (41) [2022-03-18 14:27:44,527 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 180 transitions. [2022-03-18 14:27:44,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2022-03-18 14:27:44,528 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 14:27:44,528 INFO L500 BasicCegarLoop]: trace histogram [25, 24, 24, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 14:27:44,546 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2022-03-18 14:27:44,743 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-03-18 14:27:44,743 INFO L403 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 14:27:44,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 14:27:44,744 INFO L85 PathProgramCache]: Analyzing trace with hash -1363924019, now seen corresponding path program 3 times [2022-03-18 14:27:44,744 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 14:27:44,744 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1559222762] [2022-03-18 14:27:44,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 14:27:44,744 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 14:27:44,751 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 14:27:44,751 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [220412229] [2022-03-18 14:27:44,751 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-18 14:27:44,751 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 14:27:44,751 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 14:27:44,752 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 14:27:44,753 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-03-18 14:27:45,217 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-03-18 14:27:45,218 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 14:27:45,220 INFO L263 TraceCheckSpWp]: Trace formula consists of 254 conjuncts, 70 conjunts are in the unsatisfiable core [2022-03-18 14:27:45,229 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 14:27:46,687 INFO L134 CoverageAnalysis]: Checked inductivity of 1309 backedges. 175 proven. 99 refuted. 0 times theorem prover too weak. 1035 trivial. 0 not checked. [2022-03-18 14:27:46,687 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 14:27:47,934 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-18 14:28:35,282 INFO L134 CoverageAnalysis]: Checked inductivity of 1309 backedges. 169 proven. 90 refuted. 0 times theorem prover too weak. 1050 trivial. 0 not checked. [2022-03-18 14:28:35,282 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 14:28:35,282 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1559222762] [2022-03-18 14:28:35,282 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 14:28:35,282 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [220412229] [2022-03-18 14:28:35,282 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [220412229] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 14:28:35,282 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 14:28:35,282 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 17] total 31 [2022-03-18 14:28:35,282 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [372816198] [2022-03-18 14:28:35,282 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-18 14:28:35,283 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-03-18 14:28:35,283 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 14:28:35,283 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-03-18 14:28:35,283 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=156, Invalid=768, Unknown=6, NotChecked=0, Total=930 [2022-03-18 14:28:35,284 INFO L87 Difference]: Start difference. First operand 147 states and 180 transitions. Second operand has 31 states, 28 states have (on average 2.0714285714285716) internal successors, (58), 27 states have internal predecessors, (58), 17 states have call successors, (47), 2 states have call predecessors, (47), 3 states have return successors, (45), 13 states have call predecessors, (45), 15 states have call successors, (45) [2022-03-18 14:28:37,961 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.92s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-18 14:29:03,983 WARN L232 SmtUtils]: Spent 24.04s on a formula simplification that was a NOOP. DAG size: 151 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-18 14:29:13,693 WARN L232 SmtUtils]: Spent 6.97s on a formula simplification that was a NOOP. DAG size: 137 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-18 14:29:15,835 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.14s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-18 14:29:18,026 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-18 14:29:20,028 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-18 14:29:22,483 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-18 14:29:24,723 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-18 14:29:36,299 WARN L232 SmtUtils]: Spent 9.08s on a formula simplification that was a NOOP. DAG size: 137 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-18 14:29:38,510 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-18 14:29:40,555 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-18 14:29:42,563 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-18 14:29:44,591 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-18 14:30:19,603 WARN L232 SmtUtils]: Spent 32.36s on a formula simplification that was a NOOP. DAG size: 115 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-18 14:30:21,741 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.92s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-18 14:30:23,743 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-18 14:30:25,460 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.72s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-18 14:30:27,463 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-18 14:30:30,630 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-18 14:30:44,178 WARN L232 SmtUtils]: Spent 10.07s on a formula simplification that was a NOOP. DAG size: 111 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-18 14:30:47,414 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-18 14:30:49,429 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-18 14:31:07,144 WARN L232 SmtUtils]: Spent 15.57s on a formula simplification that was a NOOP. DAG size: 111 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-18 14:31:09,334 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-18 14:31:11,359 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-18 14:31:26,008 WARN L232 SmtUtils]: Spent 12.29s on a formula simplification that was a NOOP. DAG size: 150 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-18 14:31:48,269 WARN L232 SmtUtils]: Spent 18.46s on a formula simplification that was a NOOP. DAG size: 101 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-18 14:31:50,331 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-18 14:32:07,990 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-18 14:32:09,993 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-18 14:32:12,179 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-18 14:32:14,182 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-18 14:32:19,166 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-18 14:32:21,183 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-18 14:32:25,793 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-18 14:32:39,791 WARN L232 SmtUtils]: Spent 7.28s on a formula simplification that was a NOOP. DAG size: 136 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-18 14:32:41,796 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-18 14:32:56,682 WARN L232 SmtUtils]: Spent 12.05s on a formula simplification that was a NOOP. DAG size: 100 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-18 14:34:32,557 WARN L232 SmtUtils]: Spent 1.09m on a formula simplification. DAG size of input: 109 DAG size of output: 106 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-18 14:34:34,563 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-18 14:34:38,987 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-18 14:34:40,989 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers []