/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerCTransformed.xml -s ../../../trunk/examples/settings/loopacceleration/qvasr/qvasr_64.epf -i ../../../trunk/examples/svcomp/nla-digbench-scaling/egcd3-ll_unwindbound50.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-7968f31 [2022-03-17 21:30:04,342 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-17 21:30:04,343 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-17 21:30:04,379 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-03-17 21:30:04,379 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-03-17 21:30:04,380 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-03-17 21:30:04,381 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-03-17 21:30:04,394 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-03-17 21:30:04,396 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-03-17 21:30:04,397 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-03-17 21:30:04,398 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-03-17 21:30:04,399 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-03-17 21:30:04,399 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-03-17 21:30:04,399 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-03-17 21:30:04,400 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-03-17 21:30:04,401 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-03-17 21:30:04,401 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-03-17 21:30:04,401 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-03-17 21:30:04,402 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-03-17 21:30:04,403 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-03-17 21:30:04,404 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-03-17 21:30:04,410 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-03-17 21:30:04,411 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-03-17 21:30:04,413 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-03-17 21:30:04,415 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-03-17 21:30:04,421 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-03-17 21:30:04,425 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-03-17 21:30:04,425 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-03-17 21:30:04,430 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-03-17 21:30:04,431 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/loopacceleration/qvasr/qvasr_64.epf [2022-03-17 21:30:04,451 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-17 21:30:04,451 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-17 21:30:04,452 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-03-17 21:30:04,452 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-03-17 21:30:04,452 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-03-17 21:30:04,453 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-03-17 21:30:04,453 INFO L138 SettingsManager]: * Use SBE=true [2022-03-17 21:30:04,453 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-17 21:30:04,453 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-17 21:30:04,453 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-17 21:30:04,454 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-17 21:30:04,454 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-17 21:30:04,454 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-17 21:30:04,454 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-17 21:30:04,454 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-17 21:30:04,454 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-17 21:30:04,454 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-17 21:30:04,454 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-17 21:30:04,454 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-17 21:30:04,454 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-17 21:30:04,454 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-17 21:30:04,455 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-03-17 21:30:04,455 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-03-17 21:30:04,455 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-03-17 21:30:04,455 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-03-17 21:30:04,455 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-03-17 21:30:04,455 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-03-17 21:30:04,455 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-03-17 21:30:04,456 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-03-17 21:30:04,456 INFO L138 SettingsManager]: * TransformationType=LOOP_ACCELERATION_QVASR WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-03-17 21:30:04,643 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-17 21:30:04,656 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-17 21:30:04,658 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-17 21:30:04,658 INFO L271 PluginConnector]: Initializing CDTParser... [2022-03-17 21:30:04,660 INFO L275 PluginConnector]: CDTParser initialized [2022-03-17 21:30:04,661 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/egcd3-ll_unwindbound50.c [2022-03-17 21:30:04,700 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bce520e27/1e038ef9c0674636b93c28149c816fa6/FLAG73e0e1e2a [2022-03-17 21:30:05,052 INFO L306 CDTParser]: Found 1 translation units. [2022-03-17 21:30:05,052 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/egcd3-ll_unwindbound50.c [2022-03-17 21:30:05,056 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bce520e27/1e038ef9c0674636b93c28149c816fa6/FLAG73e0e1e2a [2022-03-17 21:30:05,064 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bce520e27/1e038ef9c0674636b93c28149c816fa6 [2022-03-17 21:30:05,066 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-17 21:30:05,067 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-03-17 21:30:05,068 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-03-17 21:30:05,068 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-03-17 21:30:05,070 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-03-17 21:30:05,070 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.03 09:30:05" (1/1) ... [2022-03-17 21:30:05,071 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@45763d5d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 09:30:05, skipping insertion in model container [2022-03-17 21:30:05,071 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.03 09:30:05" (1/1) ... [2022-03-17 21:30:05,075 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-03-17 21:30:05,085 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-03-17 21:30:05,252 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/egcd3-ll_unwindbound50.c[490,503] [2022-03-17 21:30:05,271 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-17 21:30:05,285 INFO L203 MainTranslator]: Completed pre-run [2022-03-17 21:30:05,294 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/egcd3-ll_unwindbound50.c[490,503] [2022-03-17 21:30:05,314 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-17 21:30:05,322 INFO L208 MainTranslator]: Completed translation [2022-03-17 21:30:05,322 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 09:30:05 WrapperNode [2022-03-17 21:30:05,323 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-03-17 21:30:05,325 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-17 21:30:05,326 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-17 21:30:05,326 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-17 21:30:05,333 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 09:30:05" (1/1) ... [2022-03-17 21:30:05,333 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 09:30:05" (1/1) ... [2022-03-17 21:30:05,338 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 09:30:05" (1/1) ... [2022-03-17 21:30:05,339 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 09:30:05" (1/1) ... [2022-03-17 21:30:05,349 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 09:30:05" (1/1) ... [2022-03-17 21:30:05,354 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 09:30:05" (1/1) ... [2022-03-17 21:30:05,358 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 09:30:05" (1/1) ... [2022-03-17 21:30:05,362 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-17 21:30:05,363 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-17 21:30:05,363 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-17 21:30:05,363 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-17 21:30:05,364 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 09:30:05" (1/1) ... [2022-03-17 21:30:05,369 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-17 21:30:05,375 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 21:30:05,385 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-03-17 21:30:05,399 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-03-17 21:30:05,423 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-03-17 21:30:05,423 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-17 21:30:05,423 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-03-17 21:30:05,423 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-03-17 21:30:05,424 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-03-17 21:30:05,424 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-03-17 21:30:05,424 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-03-17 21:30:05,425 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-03-17 21:30:05,426 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-03-17 21:30:05,426 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-03-17 21:30:05,426 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-03-17 21:30:05,426 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-03-17 21:30:05,426 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-03-17 21:30:05,426 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-03-17 21:30:05,426 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-03-17 21:30:05,426 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-03-17 21:30:05,426 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-17 21:30:05,426 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-03-17 21:30:05,427 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-03-17 21:30:05,427 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-03-17 21:30:05,487 INFO L234 CfgBuilder]: Building ICFG [2022-03-17 21:30:05,488 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-17 21:30:05,621 INFO L275 CfgBuilder]: Performing block encoding [2022-03-17 21:30:05,625 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-17 21:30:05,626 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2022-03-17 21:30:05,627 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.03 09:30:05 BoogieIcfgContainer [2022-03-17 21:30:05,627 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-17 21:30:05,627 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-03-17 21:30:05,627 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-03-17 21:30:05,644 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-03-17 21:30:05,647 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.03 09:30:05" (1/1) ... [2022-03-17 21:30:05,671 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 17.03 09:30:05 BasicIcfg [2022-03-17 21:30:05,672 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-03-17 21:30:05,673 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-17 21:30:05,673 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-17 21:30:05,675 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-17 21:30:05,675 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.03 09:30:05" (1/4) ... [2022-03-17 21:30:05,676 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3a4f59fb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.03 09:30:05, skipping insertion in model container [2022-03-17 21:30:05,676 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 09:30:05" (2/4) ... [2022-03-17 21:30:05,676 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3a4f59fb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.03 09:30:05, skipping insertion in model container [2022-03-17 21:30:05,676 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.03 09:30:05" (3/4) ... [2022-03-17 21:30:05,676 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3a4f59fb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 17.03 09:30:05, skipping insertion in model container [2022-03-17 21:30:05,676 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 17.03 09:30:05" (4/4) ... [2022-03-17 21:30:05,677 INFO L111 eAbstractionObserver]: Analyzing ICFG egcd3-ll_unwindbound50.cqvasr [2022-03-17 21:30:05,680 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-03-17 21:30:05,680 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-17 21:30:05,719 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-17 21:30:05,733 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=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP [2022-03-17 21:30:05,733 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-03-17 21:30:05,747 INFO L276 IsEmpty]: Start isEmpty. Operand has 40 states, 25 states have (on average 1.48) internal successors, (37), 26 states have internal predecessors, (37), 9 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-03-17 21:30:05,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-17 21:30:05,750 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 21:30:05,751 INFO L500 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 21:30:05,751 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 21:30:05,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 21:30:05,755 INFO L85 PathProgramCache]: Analyzing trace with hash 6304412, now seen corresponding path program 1 times [2022-03-17 21:30:05,761 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 21:30:05,761 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [451939827] [2022-03-17 21:30:05,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 21:30:05,762 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 21:30:05,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 21:30:05,913 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-17 21:30:05,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 21:30:05,924 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-17 21:30:05,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 21:30:05,935 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-03-17 21:30:05,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 21:30:05,946 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-17 21:30:05,946 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 21:30:05,946 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [451939827] [2022-03-17 21:30:05,947 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [451939827] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-17 21:30:05,947 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-17 21:30:05,947 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-17 21:30:05,948 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1691803696] [2022-03-17 21:30:05,950 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-17 21:30:05,953 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-03-17 21:30:05,953 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 21:30:05,976 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-03-17 21:30:05,977 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-17 21:30:05,978 INFO L87 Difference]: Start difference. First operand has 40 states, 25 states have (on average 1.48) internal successors, (37), 26 states have internal predecessors, (37), 9 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-17 21:30:06,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 21:30:06,053 INFO L93 Difference]: Finished difference Result 74 states and 111 transitions. [2022-03-17 21:30:06,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-03-17 21:30:06,054 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 22 [2022-03-17 21:30:06,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 21:30:06,059 INFO L225 Difference]: With dead ends: 74 [2022-03-17 21:30:06,059 INFO L226 Difference]: Without dead ends: 36 [2022-03-17 21:30:06,061 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-17 21:30:06,063 INFO L912 BasicCegarLoop]: 47 mSDtfsCounter, 10 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-17 21:30:06,064 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 51 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-17 21:30:06,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2022-03-17 21:30:06,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 35. [2022-03-17 21:30:06,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 22 states have (on average 1.3181818181818181) internal successors, (29), 23 states have internal predecessors, (29), 9 states have call successors, (9), 4 states have call predecessors, (9), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-03-17 21:30:06,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 45 transitions. [2022-03-17 21:30:06,088 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 45 transitions. Word has length 22 [2022-03-17 21:30:06,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 21:30:06,088 INFO L478 AbstractCegarLoop]: Abstraction has 35 states and 45 transitions. [2022-03-17 21:30:06,088 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-17 21:30:06,088 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 45 transitions. [2022-03-17 21:30:06,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-17 21:30:06,089 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 21:30:06,089 INFO L500 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 21:30:06,090 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-17 21:30:06,090 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 21:30:06,090 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 21:30:06,090 INFO L85 PathProgramCache]: Analyzing trace with hash 1535904754, now seen corresponding path program 1 times [2022-03-17 21:30:06,090 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 21:30:06,091 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1446626485] [2022-03-17 21:30:06,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 21:30:06,091 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 21:30:06,102 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-17 21:30:06,103 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1973659055] [2022-03-17 21:30:06,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 21:30:06,103 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 21:30:06,103 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 21:30:06,105 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-17 21:30:06,105 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-03-17 21:30:06,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 21:30:06,161 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 5 conjunts are in the unsatisfiable core [2022-03-17 21:30:06,164 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 21:30:06,232 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-17 21:30:06,233 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-17 21:30:06,233 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 21:30:06,233 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1446626485] [2022-03-17 21:30:06,233 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-17 21:30:06,233 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1973659055] [2022-03-17 21:30:06,233 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1973659055] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-17 21:30:06,233 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-17 21:30:06,234 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-17 21:30:06,234 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [417332466] [2022-03-17 21:30:06,234 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-17 21:30:06,235 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-17 21:30:06,235 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 21:30:06,235 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-17 21:30:06,235 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-17 21:30:06,236 INFO L87 Difference]: Start difference. First operand 35 states and 45 transitions. Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-17 21:30:06,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 21:30:06,247 INFO L93 Difference]: Finished difference Result 44 states and 54 transitions. [2022-03-17 21:30:06,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-17 21:30:06,247 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 23 [2022-03-17 21:30:06,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 21:30:06,248 INFO L225 Difference]: With dead ends: 44 [2022-03-17 21:30:06,248 INFO L226 Difference]: Without dead ends: 37 [2022-03-17 21:30:06,248 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-17 21:30:06,249 INFO L912 BasicCegarLoop]: 43 mSDtfsCounter, 0 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 113 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-17 21:30:06,249 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 113 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-17 21:30:06,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2022-03-17 21:30:06,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2022-03-17 21:30:06,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 24 states have (on average 1.2916666666666667) internal successors, (31), 25 states have internal predecessors, (31), 9 states have call successors, (9), 4 states have call predecessors, (9), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-03-17 21:30:06,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 47 transitions. [2022-03-17 21:30:06,255 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 47 transitions. Word has length 23 [2022-03-17 21:30:06,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 21:30:06,256 INFO L478 AbstractCegarLoop]: Abstraction has 37 states and 47 transitions. [2022-03-17 21:30:06,256 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-17 21:30:06,256 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 47 transitions. [2022-03-17 21:30:06,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-17 21:30:06,256 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 21:30:06,257 INFO L500 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 21:30:06,275 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-03-17 21:30:06,473 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 [2022-03-17 21:30:06,473 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 21:30:06,474 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 21:30:06,474 INFO L85 PathProgramCache]: Analyzing trace with hash 401530880, now seen corresponding path program 1 times [2022-03-17 21:30:06,474 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 21:30:06,474 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1084905784] [2022-03-17 21:30:06,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 21:30:06,474 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 21:30:06,485 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-17 21:30:06,485 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1476440682] [2022-03-17 21:30:06,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 21:30:06,485 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 21:30:06,485 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 21:30:06,495 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-17 21:30:06,497 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-03-17 21:30:06,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 21:30:06,532 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-17 21:30:06,533 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 21:30:06,599 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-17 21:30:06,599 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-17 21:30:06,599 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 21:30:06,599 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1084905784] [2022-03-17 21:30:06,599 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-17 21:30:06,599 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1476440682] [2022-03-17 21:30:06,599 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1476440682] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-17 21:30:06,599 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-17 21:30:06,600 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-17 21:30:06,600 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [769741669] [2022-03-17 21:30:06,600 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-17 21:30:06,600 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-17 21:30:06,600 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 21:30:06,600 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-17 21:30:06,601 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-03-17 21:30:06,601 INFO L87 Difference]: Start difference. First operand 37 states and 47 transitions. Second operand has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-03-17 21:30:06,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 21:30:06,670 INFO L93 Difference]: Finished difference Result 57 states and 75 transitions. [2022-03-17 21:30:06,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-17 21:30:06,671 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 24 [2022-03-17 21:30:06,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 21:30:06,672 INFO L225 Difference]: With dead ends: 57 [2022-03-17 21:30:06,672 INFO L226 Difference]: Without dead ends: 50 [2022-03-17 21:30:06,672 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-03-17 21:30:06,673 INFO L912 BasicCegarLoop]: 41 mSDtfsCounter, 46 mSDsluCounter, 128 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 169 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-17 21:30:06,673 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [50 Valid, 169 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-17 21:30:06,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2022-03-17 21:30:06,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 38. [2022-03-17 21:30:06,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 25 states have (on average 1.28) internal successors, (32), 26 states have internal predecessors, (32), 9 states have call successors, (9), 4 states have call predecessors, (9), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-03-17 21:30:06,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 48 transitions. [2022-03-17 21:30:06,680 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 48 transitions. Word has length 24 [2022-03-17 21:30:06,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 21:30:06,680 INFO L478 AbstractCegarLoop]: Abstraction has 38 states and 48 transitions. [2022-03-17 21:30:06,680 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-03-17 21:30:06,680 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 48 transitions. [2022-03-17 21:30:06,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-03-17 21:30:06,681 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 21:30:06,681 INFO L500 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 21:30:06,697 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-03-17 21:30:06,891 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 [2022-03-17 21:30:06,891 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 21:30:06,891 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 21:30:06,892 INFO L85 PathProgramCache]: Analyzing trace with hash 2110136122, now seen corresponding path program 1 times [2022-03-17 21:30:06,892 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 21:30:06,892 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1915628824] [2022-03-17 21:30:06,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 21:30:06,892 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 21:30:06,902 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-17 21:30:06,902 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1623880175] [2022-03-17 21:30:06,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 21:30:06,902 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 21:30:06,902 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 21:30:06,903 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-17 21:30:06,904 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-03-17 21:30:06,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 21:30:06,941 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-17 21:30:06,942 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 21:30:07,021 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-17 21:30:07,021 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-17 21:30:07,021 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 21:30:07,021 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1915628824] [2022-03-17 21:30:07,021 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-17 21:30:07,021 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1623880175] [2022-03-17 21:30:07,022 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1623880175] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-17 21:30:07,022 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-17 21:30:07,022 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-17 21:30:07,022 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [458340098] [2022-03-17 21:30:07,022 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-17 21:30:07,022 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-17 21:30:07,022 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 21:30:07,023 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-17 21:30:07,023 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-03-17 21:30:07,023 INFO L87 Difference]: Start difference. First operand 38 states and 48 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-17 21:30:07,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 21:30:07,053 INFO L93 Difference]: Finished difference Result 62 states and 82 transitions. [2022-03-17 21:30:07,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-17 21:30:07,055 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 29 [2022-03-17 21:30:07,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 21:30:07,056 INFO L225 Difference]: With dead ends: 62 [2022-03-17 21:30:07,056 INFO L226 Difference]: Without dead ends: 40 [2022-03-17 21:30:07,056 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-03-17 21:30:07,059 INFO L912 BasicCegarLoop]: 42 mSDtfsCounter, 6 mSDsluCounter, 71 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 113 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-17 21:30:07,059 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 113 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-17 21:30:07,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2022-03-17 21:30:07,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2022-03-17 21:30:07,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 27 states have (on average 1.2592592592592593) internal successors, (34), 28 states have internal predecessors, (34), 9 states have call successors, (9), 4 states have call predecessors, (9), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-03-17 21:30:07,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 50 transitions. [2022-03-17 21:30:07,065 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 50 transitions. Word has length 29 [2022-03-17 21:30:07,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 21:30:07,065 INFO L478 AbstractCegarLoop]: Abstraction has 40 states and 50 transitions. [2022-03-17 21:30:07,065 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-17 21:30:07,065 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 50 transitions. [2022-03-17 21:30:07,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-03-17 21:30:07,066 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 21:30:07,066 INFO L500 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 21:30:07,085 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-03-17 21:30:07,266 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 [2022-03-17 21:30:07,267 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 21:30:07,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 21:30:07,267 INFO L85 PathProgramCache]: Analyzing trace with hash -358604865, now seen corresponding path program 1 times [2022-03-17 21:30:07,268 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 21:30:07,268 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [10708700] [2022-03-17 21:30:07,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 21:30:07,268 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 21:30:07,285 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-17 21:30:07,285 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1193818321] [2022-03-17 21:30:07,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 21:30:07,285 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 21:30:07,285 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 21:30:07,297 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-17 21:30:07,298 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-03-17 21:30:07,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 21:30:07,331 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-17 21:30:07,336 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 21:30:07,572 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-17 21:30:07,572 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-17 21:30:07,572 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 21:30:07,572 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [10708700] [2022-03-17 21:30:07,572 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-17 21:30:07,572 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1193818321] [2022-03-17 21:30:07,573 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1193818321] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-17 21:30:07,573 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-17 21:30:07,573 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-03-17 21:30:07,573 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [328212291] [2022-03-17 21:30:07,573 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-17 21:30:07,573 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-17 21:30:07,573 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 21:30:07,574 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-17 21:30:07,574 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2022-03-17 21:30:07,574 INFO L87 Difference]: Start difference. First operand 40 states and 50 transitions. Second operand has 10 states, 10 states have (on average 2.1) internal successors, (21), 8 states have internal predecessors, (21), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-03-17 21:30:07,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 21:30:07,719 INFO L93 Difference]: Finished difference Result 68 states and 92 transitions. [2022-03-17 21:30:07,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-17 21:30:07,719 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 8 states have internal predecessors, (21), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 29 [2022-03-17 21:30:07,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 21:30:07,720 INFO L225 Difference]: With dead ends: 68 [2022-03-17 21:30:07,720 INFO L226 Difference]: Without dead ends: 66 [2022-03-17 21:30:07,721 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2022-03-17 21:30:07,721 INFO L912 BasicCegarLoop]: 40 mSDtfsCounter, 79 mSDsluCounter, 199 mSDsCounter, 0 mSdLazyCounter, 145 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 239 SdHoareTripleChecker+Invalid, 174 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 145 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-17 21:30:07,722 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [83 Valid, 239 Invalid, 174 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 145 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-17 21:30:07,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2022-03-17 21:30:07,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 55. [2022-03-17 21:30:07,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 37 states have (on average 1.2972972972972974) internal successors, (48), 38 states have internal predecessors, (48), 13 states have call successors, (13), 5 states have call predecessors, (13), 4 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2022-03-17 21:30:07,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 72 transitions. [2022-03-17 21:30:07,730 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 72 transitions. Word has length 29 [2022-03-17 21:30:07,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 21:30:07,731 INFO L478 AbstractCegarLoop]: Abstraction has 55 states and 72 transitions. [2022-03-17 21:30:07,731 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 8 states have internal predecessors, (21), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-03-17 21:30:07,731 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 72 transitions. [2022-03-17 21:30:07,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-17 21:30:07,731 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 21:30:07,731 INFO L500 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 21:30:07,750 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-03-17 21:30:07,947 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 [2022-03-17 21:30:07,947 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 21:30:07,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 21:30:07,948 INFO L85 PathProgramCache]: Analyzing trace with hash -2061673945, now seen corresponding path program 1 times [2022-03-17 21:30:07,948 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 21:30:07,948 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [881649968] [2022-03-17 21:30:07,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 21:30:07,948 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 21:30:07,959 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-17 21:30:07,959 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [753604215] [2022-03-17 21:30:07,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 21:30:07,959 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 21:30:07,959 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 21:30:07,960 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-17 21:30:07,961 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-03-17 21:30:07,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 21:30:07,997 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-17 21:30:07,999 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 21:30:08,052 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-17 21:30:08,052 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 21:30:08,123 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-17 21:30:08,124 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 21:30:08,124 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [881649968] [2022-03-17 21:30:08,124 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-17 21:30:08,124 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [753604215] [2022-03-17 21:30:08,124 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [753604215] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-17 21:30:08,124 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-17 21:30:08,124 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2022-03-17 21:30:08,125 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2040603610] [2022-03-17 21:30:08,125 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-17 21:30:08,125 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-17 21:30:08,125 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 21:30:08,125 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-17 21:30:08,126 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2022-03-17 21:30:08,126 INFO L87 Difference]: Start difference. First operand 55 states and 72 transitions. Second operand has 10 states, 10 states have (on average 3.5) internal successors, (35), 10 states have internal predecessors, (35), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (6), 2 states have call predecessors, (6), 3 states have call successors, (6) [2022-03-17 21:30:08,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 21:30:08,235 INFO L93 Difference]: Finished difference Result 151 states and 197 transitions. [2022-03-17 21:30:08,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-17 21:30:08,235 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.5) internal successors, (35), 10 states have internal predecessors, (35), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (6), 2 states have call predecessors, (6), 3 states have call successors, (6) Word has length 30 [2022-03-17 21:30:08,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 21:30:08,237 INFO L225 Difference]: With dead ends: 151 [2022-03-17 21:30:08,237 INFO L226 Difference]: Without dead ends: 144 [2022-03-17 21:30:08,237 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=56, Invalid=100, Unknown=0, NotChecked=0, Total=156 [2022-03-17 21:30:08,238 INFO L912 BasicCegarLoop]: 53 mSDtfsCounter, 82 mSDsluCounter, 219 mSDsCounter, 0 mSdLazyCounter, 90 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 272 SdHoareTripleChecker+Invalid, 114 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 90 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-17 21:30:08,238 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [82 Valid, 272 Invalid, 114 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 90 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-17 21:30:08,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2022-03-17 21:30:08,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 101. [2022-03-17 21:30:08,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 70 states have (on average 1.3285714285714285) internal successors, (93), 72 states have internal predecessors, (93), 22 states have call successors, (22), 9 states have call predecessors, (22), 8 states have return successors, (19), 19 states have call predecessors, (19), 19 states have call successors, (19) [2022-03-17 21:30:08,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 134 transitions. [2022-03-17 21:30:08,252 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 134 transitions. Word has length 30 [2022-03-17 21:30:08,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 21:30:08,252 INFO L478 AbstractCegarLoop]: Abstraction has 101 states and 134 transitions. [2022-03-17 21:30:08,252 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.5) internal successors, (35), 10 states have internal predecessors, (35), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (6), 2 states have call predecessors, (6), 3 states have call successors, (6) [2022-03-17 21:30:08,252 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 134 transitions. [2022-03-17 21:30:08,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-03-17 21:30:08,253 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 21:30:08,253 INFO L500 BasicCegarLoop]: trace histogram [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] [2022-03-17 21:30:08,273 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-03-17 21:30:08,470 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 [2022-03-17 21:30:08,470 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 21:30:08,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 21:30:08,471 INFO L85 PathProgramCache]: Analyzing trace with hash 545740907, now seen corresponding path program 1 times [2022-03-17 21:30:08,471 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 21:30:08,471 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [938932694] [2022-03-17 21:30:08,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 21:30:08,471 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 21:30:08,480 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-17 21:30:08,481 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1340559747] [2022-03-17 21:30:08,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 21:30:08,481 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 21:30:08,481 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 21:30:08,484 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-17 21:30:08,488 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-03-17 21:30:08,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 21:30:08,522 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-17 21:30:08,525 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 21:30:08,593 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-17 21:30:08,594 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 21:30:08,669 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-17 21:30:08,670 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 21:30:08,670 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [938932694] [2022-03-17 21:30:08,670 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-17 21:30:08,670 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1340559747] [2022-03-17 21:30:08,670 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1340559747] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-17 21:30:08,670 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-17 21:30:08,670 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2022-03-17 21:30:08,671 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1524986136] [2022-03-17 21:30:08,671 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-17 21:30:08,671 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-17 21:30:08,671 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 21:30:08,671 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-17 21:30:08,671 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2022-03-17 21:30:08,672 INFO L87 Difference]: Start difference. First operand 101 states and 134 transitions. Second operand has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 8 states have internal predecessors, (25), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-17 21:30:08,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 21:30:08,788 INFO L93 Difference]: Finished difference Result 187 states and 265 transitions. [2022-03-17 21:30:08,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-17 21:30:08,789 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), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 31 [2022-03-17 21:30:08,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 21:30:08,791 INFO L225 Difference]: With dead ends: 187 [2022-03-17 21:30:08,791 INFO L226 Difference]: Without dead ends: 175 [2022-03-17 21:30:08,791 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 53 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2022-03-17 21:30:08,792 INFO L912 BasicCegarLoop]: 65 mSDtfsCounter, 113 mSDsluCounter, 297 mSDsCounter, 0 mSdLazyCounter, 99 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 117 SdHoareTripleChecker+Valid, 362 SdHoareTripleChecker+Invalid, 162 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 99 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-17 21:30:08,793 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [117 Valid, 362 Invalid, 162 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 99 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-17 21:30:08,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2022-03-17 21:30:08,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 132. [2022-03-17 21:30:08,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132 states, 98 states have (on average 1.346938775510204) internal successors, (132), 99 states have internal predecessors, (132), 25 states have call successors, (25), 9 states have call predecessors, (25), 8 states have return successors, (23), 23 states have call predecessors, (23), 23 states have call successors, (23) [2022-03-17 21:30:08,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 180 transitions. [2022-03-17 21:30:08,821 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 180 transitions. Word has length 31 [2022-03-17 21:30:08,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 21:30:08,821 INFO L478 AbstractCegarLoop]: Abstraction has 132 states and 180 transitions. [2022-03-17 21:30:08,821 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), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-17 21:30:08,821 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 180 transitions. [2022-03-17 21:30:08,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-03-17 21:30:08,822 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 21:30:08,822 INFO L500 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 21:30:08,843 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-03-17 21:30:09,041 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 [2022-03-17 21:30:09,041 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 21:30:09,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 21:30:09,041 INFO L85 PathProgramCache]: Analyzing trace with hash 653912885, now seen corresponding path program 1 times [2022-03-17 21:30:09,041 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 21:30:09,041 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1389426264] [2022-03-17 21:30:09,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 21:30:09,042 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 21:30:09,058 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-17 21:30:09,058 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [238330234] [2022-03-17 21:30:09,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 21:30:09,058 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 21:30:09,058 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 21:30:09,060 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-17 21:30:09,061 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-03-17 21:30:09,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 21:30:09,093 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-17 21:30:09,094 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 21:30:09,276 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-17 21:30:09,276 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-17 21:30:09,276 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 21:30:09,277 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1389426264] [2022-03-17 21:30:09,277 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-17 21:30:09,277 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [238330234] [2022-03-17 21:30:09,277 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [238330234] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-17 21:30:09,277 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-17 21:30:09,277 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-03-17 21:30:09,277 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [948629619] [2022-03-17 21:30:09,277 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-17 21:30:09,277 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-17 21:30:09,278 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 21:30:09,278 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-17 21:30:09,278 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2022-03-17 21:30:09,278 INFO L87 Difference]: Start difference. First operand 132 states and 180 transitions. Second operand has 10 states, 10 states have (on average 2.4) internal successors, (24), 8 states have internal predecessors, (24), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-17 21:30:09,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 21:30:09,461 INFO L93 Difference]: Finished difference Result 157 states and 210 transitions. [2022-03-17 21:30:09,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-17 21:30:09,461 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.4) internal successors, (24), 8 states have internal predecessors, (24), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 34 [2022-03-17 21:30:09,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 21:30:09,462 INFO L225 Difference]: With dead ends: 157 [2022-03-17 21:30:09,462 INFO L226 Difference]: Without dead ends: 155 [2022-03-17 21:30:09,463 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2022-03-17 21:30:09,463 INFO L912 BasicCegarLoop]: 43 mSDtfsCounter, 80 mSDsluCounter, 226 mSDsCounter, 0 mSdLazyCounter, 158 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 269 SdHoareTripleChecker+Invalid, 186 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 158 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-17 21:30:09,463 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [84 Valid, 269 Invalid, 186 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 158 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-17 21:30:09,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2022-03-17 21:30:09,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 144. [2022-03-17 21:30:09,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 144 states, 107 states have (on average 1.3177570093457944) internal successors, (141), 108 states have internal predecessors, (141), 25 states have call successors, (25), 12 states have call predecessors, (25), 11 states have return successors, (23), 23 states have call predecessors, (23), 23 states have call successors, (23) [2022-03-17 21:30:09,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 189 transitions. [2022-03-17 21:30:09,475 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 189 transitions. Word has length 34 [2022-03-17 21:30:09,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 21:30:09,476 INFO L478 AbstractCegarLoop]: Abstraction has 144 states and 189 transitions. [2022-03-17 21:30:09,476 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.4) internal successors, (24), 8 states have internal predecessors, (24), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-17 21:30:09,476 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 189 transitions. [2022-03-17 21:30:09,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-03-17 21:30:09,477 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 21:30:09,477 INFO L500 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 21:30:09,495 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-03-17 21:30:09,691 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 [2022-03-17 21:30:09,692 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 21:30:09,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 21:30:09,692 INFO L85 PathProgramCache]: Analyzing trace with hash -47631820, now seen corresponding path program 1 times [2022-03-17 21:30:09,692 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 21:30:09,692 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1575307391] [2022-03-17 21:30:09,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 21:30:09,692 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 21:30:09,701 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-17 21:30:09,701 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [701417930] [2022-03-17 21:30:09,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 21:30:09,701 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 21:30:09,701 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 21:30:09,702 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-17 21:30:09,703 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-03-17 21:30:09,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 21:30:09,737 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 20 conjunts are in the unsatisfiable core [2022-03-17 21:30:09,738 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 21:30:09,914 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-17 21:30:09,914 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 21:30:09,996 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-17 21:30:09,996 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 21:30:09,996 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1575307391] [2022-03-17 21:30:09,996 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-17 21:30:09,996 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [701417930] [2022-03-17 21:30:09,996 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [701417930] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-17 21:30:09,996 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-17 21:30:09,996 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 6] total 11 [2022-03-17 21:30:09,996 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1731685843] [2022-03-17 21:30:09,997 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-17 21:30:09,997 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-17 21:30:09,997 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 21:30:09,997 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-17 21:30:09,997 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2022-03-17 21:30:09,997 INFO L87 Difference]: Start difference. First operand 144 states and 189 transitions. Second operand has 11 states, 11 states have (on average 4.0) internal successors, (44), 9 states have internal predecessors, (44), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-03-17 21:30:10,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 21:30:10,115 INFO L93 Difference]: Finished difference Result 179 states and 241 transitions. [2022-03-17 21:30:10,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-17 21:30:10,116 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.0) internal successors, (44), 9 states have internal predecessors, (44), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 36 [2022-03-17 21:30:10,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 21:30:10,117 INFO L225 Difference]: With dead ends: 179 [2022-03-17 21:30:10,117 INFO L226 Difference]: Without dead ends: 177 [2022-03-17 21:30:10,117 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 61 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2022-03-17 21:30:10,117 INFO L912 BasicCegarLoop]: 58 mSDtfsCounter, 76 mSDsluCounter, 351 mSDsCounter, 0 mSdLazyCounter, 149 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 409 SdHoareTripleChecker+Invalid, 169 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 149 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-17 21:30:10,118 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [84 Valid, 409 Invalid, 169 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 149 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-17 21:30:10,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2022-03-17 21:30:10,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 174. [2022-03-17 21:30:10,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 174 states, 128 states have (on average 1.34375) internal successors, (172), 129 states have internal predecessors, (172), 33 states have call successors, (33), 13 states have call predecessors, (33), 12 states have return successors, (31), 31 states have call predecessors, (31), 31 states have call successors, (31) [2022-03-17 21:30:10,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 236 transitions. [2022-03-17 21:30:10,129 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 236 transitions. Word has length 36 [2022-03-17 21:30:10,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 21:30:10,130 INFO L478 AbstractCegarLoop]: Abstraction has 174 states and 236 transitions. [2022-03-17 21:30:10,130 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.0) internal successors, (44), 9 states have internal predecessors, (44), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-03-17 21:30:10,130 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 236 transitions. [2022-03-17 21:30:10,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-03-17 21:30:10,131 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 21:30:10,131 INFO L500 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 21:30:10,147 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-03-17 21:30:10,347 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 [2022-03-17 21:30:10,348 INFO L403 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 21:30:10,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 21:30:10,348 INFO L85 PathProgramCache]: Analyzing trace with hash -375710268, now seen corresponding path program 1 times [2022-03-17 21:30:10,348 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 21:30:10,348 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [665755196] [2022-03-17 21:30:10,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 21:30:10,348 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 21:30:10,357 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-17 21:30:10,357 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [610547929] [2022-03-17 21:30:10,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 21:30:10,357 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 21:30:10,357 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 21:30:10,358 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-17 21:30:10,359 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-03-17 21:30:10,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 21:30:10,391 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-17 21:30:10,392 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 21:30:10,447 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-17 21:30:10,447 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-17 21:30:10,447 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 21:30:10,447 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [665755196] [2022-03-17 21:30:10,447 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-17 21:30:10,447 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [610547929] [2022-03-17 21:30:10,448 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [610547929] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-17 21:30:10,448 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-17 21:30:10,448 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-17 21:30:10,448 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [210291241] [2022-03-17 21:30:10,448 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-17 21:30:10,448 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-17 21:30:10,448 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 21:30:10,448 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-17 21:30:10,449 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-03-17 21:30:10,449 INFO L87 Difference]: Start difference. First operand 174 states and 236 transitions. Second operand has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 5 states have internal predecessors, (25), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-17 21:30:10,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 21:30:10,475 INFO L93 Difference]: Finished difference Result 241 states and 329 transitions. [2022-03-17 21:30:10,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-17 21:30:10,475 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 5 states have internal predecessors, (25), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 36 [2022-03-17 21:30:10,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 21:30:10,476 INFO L225 Difference]: With dead ends: 241 [2022-03-17 21:30:10,476 INFO L226 Difference]: Without dead ends: 174 [2022-03-17 21:30:10,477 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-03-17 21:30:10,477 INFO L912 BasicCegarLoop]: 41 mSDtfsCounter, 16 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 119 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-17 21:30:10,478 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 119 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-17 21:30:10,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2022-03-17 21:30:10,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 174. [2022-03-17 21:30:10,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 174 states, 128 states have (on average 1.3359375) internal successors, (171), 129 states have internal predecessors, (171), 33 states have call successors, (33), 13 states have call predecessors, (33), 12 states have return successors, (31), 31 states have call predecessors, (31), 31 states have call successors, (31) [2022-03-17 21:30:10,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 235 transitions. [2022-03-17 21:30:10,488 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 235 transitions. Word has length 36 [2022-03-17 21:30:10,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 21:30:10,489 INFO L478 AbstractCegarLoop]: Abstraction has 174 states and 235 transitions. [2022-03-17 21:30:10,489 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 5 states have internal predecessors, (25), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-17 21:30:10,489 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 235 transitions. [2022-03-17 21:30:10,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-03-17 21:30:10,489 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 21:30:10,490 INFO L500 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 21:30:10,506 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-03-17 21:30:10,705 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 [2022-03-17 21:30:10,706 INFO L403 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 21:30:10,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 21:30:10,707 INFO L85 PathProgramCache]: Analyzing trace with hash -344890017, now seen corresponding path program 1 times [2022-03-17 21:30:10,707 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 21:30:10,707 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [394001611] [2022-03-17 21:30:10,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 21:30:10,707 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 21:30:10,715 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-17 21:30:10,715 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1295246082] [2022-03-17 21:30:10,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 21:30:10,716 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 21:30:10,716 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 21:30:10,717 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-17 21:30:10,733 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-03-17 21:30:10,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 21:30:10,752 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-17 21:30:10,753 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 21:30:10,824 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-03-17 21:30:10,824 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-17 21:30:10,824 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 21:30:10,824 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [394001611] [2022-03-17 21:30:10,824 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-17 21:30:10,824 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1295246082] [2022-03-17 21:30:10,824 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1295246082] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-17 21:30:10,824 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-17 21:30:10,824 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-17 21:30:10,825 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1320639901] [2022-03-17 21:30:10,825 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-17 21:30:10,825 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-17 21:30:10,825 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 21:30:10,825 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-17 21:30:10,825 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-17 21:30:10,826 INFO L87 Difference]: Start difference. First operand 174 states and 235 transitions. Second operand has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-03-17 21:30:10,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 21:30:10,861 INFO L93 Difference]: Finished difference Result 239 states and 335 transitions. [2022-03-17 21:30:10,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-17 21:30:10,861 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 39 [2022-03-17 21:30:10,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 21:30:10,863 INFO L225 Difference]: With dead ends: 239 [2022-03-17 21:30:10,863 INFO L226 Difference]: Without dead ends: 237 [2022-03-17 21:30:10,863 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-03-17 21:30:10,863 INFO L912 BasicCegarLoop]: 43 mSDtfsCounter, 10 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 155 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-17 21:30:10,864 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 155 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-17 21:30:10,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237 states. [2022-03-17 21:30:10,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237 to 230. [2022-03-17 21:30:10,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 230 states, 161 states have (on average 1.3664596273291925) internal successors, (220), 162 states have internal predecessors, (220), 53 states have call successors, (53), 16 states have call predecessors, (53), 15 states have return successors, (51), 51 states have call predecessors, (51), 51 states have call successors, (51) [2022-03-17 21:30:10,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 230 states to 230 states and 324 transitions. [2022-03-17 21:30:10,889 INFO L78 Accepts]: Start accepts. Automaton has 230 states and 324 transitions. Word has length 39 [2022-03-17 21:30:10,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 21:30:10,890 INFO L478 AbstractCegarLoop]: Abstraction has 230 states and 324 transitions. [2022-03-17 21:30:10,890 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-03-17 21:30:10,890 INFO L276 IsEmpty]: Start isEmpty. Operand 230 states and 324 transitions. [2022-03-17 21:30:10,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-03-17 21:30:10,890 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 21:30:10,891 INFO L500 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 21:30:10,907 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-03-17 21:30:11,107 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 [2022-03-17 21:30:11,107 INFO L403 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 21:30:11,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 21:30:11,108 INFO L85 PathProgramCache]: Analyzing trace with hash -1057809952, now seen corresponding path program 1 times [2022-03-17 21:30:11,108 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 21:30:11,108 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1141256070] [2022-03-17 21:30:11,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 21:30:11,108 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 21:30:11,115 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-17 21:30:11,115 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [276331906] [2022-03-17 21:30:11,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 21:30:11,116 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 21:30:11,116 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 21:30:11,128 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-17 21:30:11,129 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-03-17 21:30:11,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 21:30:11,164 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 31 conjunts are in the unsatisfiable core [2022-03-17 21:30:11,165 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 21:30:11,329 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-17 21:30:11,329 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 21:30:11,424 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-17 21:30:11,425 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 21:30:11,425 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1141256070] [2022-03-17 21:30:11,425 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-17 21:30:11,425 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [276331906] [2022-03-17 21:30:11,425 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [276331906] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-17 21:30:11,425 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-17 21:30:11,425 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2022-03-17 21:30:11,425 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1465132916] [2022-03-17 21:30:11,425 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-17 21:30:11,425 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-17 21:30:11,426 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 21:30:11,426 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-17 21:30:11,426 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2022-03-17 21:30:11,426 INFO L87 Difference]: Start difference. First operand 230 states and 324 transitions. Second operand has 10 states, 10 states have (on average 4.4) internal successors, (44), 9 states have internal predecessors, (44), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2022-03-17 21:30:11,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 21:30:11,912 INFO L93 Difference]: Finished difference Result 392 states and 578 transitions. [2022-03-17 21:30:11,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-17 21:30:11,913 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.4) internal successors, (44), 9 states have internal predecessors, (44), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) Word has length 41 [2022-03-17 21:30:11,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 21:30:11,914 INFO L225 Difference]: With dead ends: 392 [2022-03-17 21:30:11,914 INFO L226 Difference]: Without dead ends: 390 [2022-03-17 21:30:11,915 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 72 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2022-03-17 21:30:11,915 INFO L912 BasicCegarLoop]: 66 mSDtfsCounter, 170 mSDsluCounter, 304 mSDsCounter, 0 mSdLazyCounter, 271 mSolverCounterSat, 96 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 177 SdHoareTripleChecker+Valid, 370 SdHoareTripleChecker+Invalid, 367 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 96 IncrementalHoareTripleChecker+Valid, 271 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-17 21:30:11,915 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [177 Valid, 370 Invalid, 367 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [96 Valid, 271 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-17 21:30:11,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 390 states. [2022-03-17 21:30:11,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 390 to 377. [2022-03-17 21:30:11,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 377 states, 266 states have (on average 1.4248120300751879) internal successors, (379), 267 states have internal predecessors, (379), 93 states have call successors, (93), 18 states have call predecessors, (93), 17 states have return successors, (91), 91 states have call predecessors, (91), 91 states have call successors, (91) [2022-03-17 21:30:11,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 377 states to 377 states and 563 transitions. [2022-03-17 21:30:11,941 INFO L78 Accepts]: Start accepts. Automaton has 377 states and 563 transitions. Word has length 41 [2022-03-17 21:30:11,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 21:30:11,941 INFO L478 AbstractCegarLoop]: Abstraction has 377 states and 563 transitions. [2022-03-17 21:30:11,941 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.4) internal successors, (44), 9 states have internal predecessors, (44), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2022-03-17 21:30:11,941 INFO L276 IsEmpty]: Start isEmpty. Operand 377 states and 563 transitions. [2022-03-17 21:30:11,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-03-17 21:30:11,942 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 21:30:11,942 INFO L500 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 21:30:11,961 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-03-17 21:30:12,158 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 [2022-03-17 21:30:12,159 INFO L403 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 21:30:12,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 21:30:12,159 INFO L85 PathProgramCache]: Analyzing trace with hash -800046763, now seen corresponding path program 1 times [2022-03-17 21:30:12,159 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 21:30:12,159 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [400333905] [2022-03-17 21:30:12,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 21:30:12,159 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 21:30:12,166 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-17 21:30:12,166 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [859439394] [2022-03-17 21:30:12,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 21:30:12,166 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 21:30:12,166 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 21:30:12,167 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-17 21:30:12,168 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-03-17 21:30:12,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 21:30:12,205 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-17 21:30:12,206 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 21:30:12,263 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-03-17 21:30:12,263 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-17 21:30:12,264 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 21:30:12,264 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [400333905] [2022-03-17 21:30:12,264 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-17 21:30:12,264 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [859439394] [2022-03-17 21:30:12,264 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [859439394] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-17 21:30:12,264 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-17 21:30:12,264 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-17 21:30:12,264 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1230869098] [2022-03-17 21:30:12,264 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-17 21:30:12,264 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-17 21:30:12,264 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 21:30:12,265 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-17 21:30:12,265 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-17 21:30:12,265 INFO L87 Difference]: Start difference. First operand 377 states and 563 transitions. Second operand has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-03-17 21:30:12,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 21:30:12,327 INFO L93 Difference]: Finished difference Result 566 states and 887 transitions. [2022-03-17 21:30:12,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-17 21:30:12,328 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 44 [2022-03-17 21:30:12,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 21:30:12,330 INFO L225 Difference]: With dead ends: 566 [2022-03-17 21:30:12,330 INFO L226 Difference]: Without dead ends: 564 [2022-03-17 21:30:12,330 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-03-17 21:30:12,330 INFO L912 BasicCegarLoop]: 49 mSDtfsCounter, 12 mSDsluCounter, 123 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 172 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-17 21:30:12,331 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 172 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-17 21:30:12,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 564 states. [2022-03-17 21:30:12,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 564 to 495. [2022-03-17 21:30:12,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 495 states, 307 states have (on average 1.4267100977198697) internal successors, (438), 327 states have internal predecessors, (438), 169 states have call successors, (169), 19 states have call predecessors, (169), 18 states have return successors, (167), 148 states have call predecessors, (167), 167 states have call successors, (167) [2022-03-17 21:30:12,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 495 states to 495 states and 774 transitions. [2022-03-17 21:30:12,370 INFO L78 Accepts]: Start accepts. Automaton has 495 states and 774 transitions. Word has length 44 [2022-03-17 21:30:12,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 21:30:12,370 INFO L478 AbstractCegarLoop]: Abstraction has 495 states and 774 transitions. [2022-03-17 21:30:12,370 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-03-17 21:30:12,370 INFO L276 IsEmpty]: Start isEmpty. Operand 495 states and 774 transitions. [2022-03-17 21:30:12,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-03-17 21:30:12,370 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 21:30:12,370 INFO L500 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 21:30:12,398 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-03-17 21:30:12,583 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 [2022-03-17 21:30:12,584 INFO L403 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 21:30:12,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 21:30:12,584 INFO L85 PathProgramCache]: Analyzing trace with hash 684933943, now seen corresponding path program 1 times [2022-03-17 21:30:12,584 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 21:30:12,584 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [191456213] [2022-03-17 21:30:12,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 21:30:12,584 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 21:30:12,591 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-17 21:30:12,591 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [683178989] [2022-03-17 21:30:12,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 21:30:12,591 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 21:30:12,591 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 21:30:12,592 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-17 21:30:12,593 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-03-17 21:30:12,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 21:30:12,630 INFO L263 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 11 conjunts are in the unsatisfiable core [2022-03-17 21:30:12,631 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 21:30:12,699 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 16 proven. 5 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-17 21:30:12,699 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 21:30:12,785 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 16 proven. 5 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-17 21:30:12,785 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 21:30:12,785 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [191456213] [2022-03-17 21:30:12,785 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-17 21:30:12,785 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [683178989] [2022-03-17 21:30:12,785 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [683178989] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-17 21:30:12,785 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-17 21:30:12,785 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2022-03-17 21:30:12,785 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [563885784] [2022-03-17 21:30:12,785 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-17 21:30:12,786 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-17 21:30:12,786 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 21:30:12,786 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-17 21:30:12,786 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=82, Unknown=0, NotChecked=0, Total=132 [2022-03-17 21:30:12,786 INFO L87 Difference]: Start difference. First operand 495 states and 774 transitions. Second operand has 12 states, 12 states have (on average 4.0) internal successors, (48), 12 states have internal predecessors, (48), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (6), 2 states have call predecessors, (6), 3 states have call successors, (6) [2022-03-17 21:30:12,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 21:30:12,974 INFO L93 Difference]: Finished difference Result 1127 states and 1721 transitions. [2022-03-17 21:30:12,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-17 21:30:12,974 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.0) internal successors, (48), 12 states have internal predecessors, (48), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (6), 2 states have call predecessors, (6), 3 states have call successors, (6) Word has length 42 [2022-03-17 21:30:12,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 21:30:12,978 INFO L225 Difference]: With dead ends: 1127 [2022-03-17 21:30:12,978 INFO L226 Difference]: Without dead ends: 770 [2022-03-17 21:30:12,980 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=93, Invalid=179, Unknown=0, NotChecked=0, Total=272 [2022-03-17 21:30:12,980 INFO L912 BasicCegarLoop]: 69 mSDtfsCounter, 169 mSDsluCounter, 273 mSDsCounter, 0 mSdLazyCounter, 115 mSolverCounterSat, 84 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 169 SdHoareTripleChecker+Valid, 342 SdHoareTripleChecker+Invalid, 199 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 84 IncrementalHoareTripleChecker+Valid, 115 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-17 21:30:12,980 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [169 Valid, 342 Invalid, 199 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [84 Valid, 115 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-17 21:30:12,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 770 states. [2022-03-17 21:30:13,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 770 to 736. [2022-03-17 21:30:13,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 736 states, 471 states have (on average 1.3630573248407643) internal successors, (642), 495 states have internal predecessors, (642), 224 states have call successors, (224), 41 states have call predecessors, (224), 40 states have return successors, (219), 199 states have call predecessors, (219), 219 states have call successors, (219) [2022-03-17 21:30:13,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 736 states to 736 states and 1085 transitions. [2022-03-17 21:30:13,035 INFO L78 Accepts]: Start accepts. Automaton has 736 states and 1085 transitions. Word has length 42 [2022-03-17 21:30:13,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 21:30:13,035 INFO L478 AbstractCegarLoop]: Abstraction has 736 states and 1085 transitions. [2022-03-17 21:30:13,035 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.0) internal successors, (48), 12 states have internal predecessors, (48), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (6), 2 states have call predecessors, (6), 3 states have call successors, (6) [2022-03-17 21:30:13,035 INFO L276 IsEmpty]: Start isEmpty. Operand 736 states and 1085 transitions. [2022-03-17 21:30:13,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-03-17 21:30:13,035 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 21:30:13,035 INFO L500 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 21:30:13,052 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-03-17 21:30:13,249 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 [2022-03-17 21:30:13,250 INFO L403 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 21:30:13,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 21:30:13,250 INFO L85 PathProgramCache]: Analyzing trace with hash 841576990, now seen corresponding path program 1 times [2022-03-17 21:30:13,250 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 21:30:13,250 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [11254649] [2022-03-17 21:30:13,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 21:30:13,250 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 21:30:13,256 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-17 21:30:13,257 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1039272476] [2022-03-17 21:30:13,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 21:30:13,257 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 21:30:13,257 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 21:30:13,258 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-17 21:30:13,259 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-03-17 21:30:13,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 21:30:13,293 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 13 conjunts are in the unsatisfiable core [2022-03-17 21:30:13,294 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 21:30:13,373 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 11 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-17 21:30:13,373 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 21:30:13,466 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 11 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-17 21:30:13,466 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 21:30:13,466 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [11254649] [2022-03-17 21:30:13,466 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-17 21:30:13,466 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1039272476] [2022-03-17 21:30:13,467 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1039272476] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-17 21:30:13,467 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-17 21:30:13,467 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2022-03-17 21:30:13,467 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [243616214] [2022-03-17 21:30:13,467 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-17 21:30:13,467 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-17 21:30:13,467 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 21:30:13,467 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-17 21:30:13,468 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2022-03-17 21:30:13,468 INFO L87 Difference]: Start difference. First operand 736 states and 1085 transitions. Second operand has 14 states, 14 states have (on average 3.857142857142857) internal successors, (54), 14 states have internal predecessors, (54), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (6), 2 states have call predecessors, (6), 3 states have call successors, (6) [2022-03-17 21:30:13,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 21:30:13,722 INFO L93 Difference]: Finished difference Result 1597 states and 2379 transitions. [2022-03-17 21:30:13,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-03-17 21:30:13,722 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.857142857142857) internal successors, (54), 14 states have internal predecessors, (54), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (6), 2 states have call predecessors, (6), 3 states have call successors, (6) Word has length 43 [2022-03-17 21:30:13,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 21:30:13,726 INFO L225 Difference]: With dead ends: 1597 [2022-03-17 21:30:13,726 INFO L226 Difference]: Without dead ends: 1119 [2022-03-17 21:30:13,727 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=144, Invalid=276, Unknown=0, NotChecked=0, Total=420 [2022-03-17 21:30:13,728 INFO L912 BasicCegarLoop]: 75 mSDtfsCounter, 255 mSDsluCounter, 244 mSDsCounter, 0 mSdLazyCounter, 142 mSolverCounterSat, 129 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 255 SdHoareTripleChecker+Valid, 319 SdHoareTripleChecker+Invalid, 271 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 129 IncrementalHoareTripleChecker+Valid, 142 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-17 21:30:13,728 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [255 Valid, 319 Invalid, 271 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [129 Valid, 142 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-17 21:30:13,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1119 states. [2022-03-17 21:30:13,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1119 to 1072. [2022-03-17 21:30:13,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1072 states, 697 states have (on average 1.3113342898134863) internal successors, (914), 730 states have internal predecessors, (914), 318 states have call successors, (318), 57 states have call predecessors, (318), 56 states have return successors, (311), 284 states have call predecessors, (311), 311 states have call successors, (311) [2022-03-17 21:30:13,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1072 states to 1072 states and 1543 transitions. [2022-03-17 21:30:13,808 INFO L78 Accepts]: Start accepts. Automaton has 1072 states and 1543 transitions. Word has length 43 [2022-03-17 21:30:13,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 21:30:13,808 INFO L478 AbstractCegarLoop]: Abstraction has 1072 states and 1543 transitions. [2022-03-17 21:30:13,808 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.857142857142857) internal successors, (54), 14 states have internal predecessors, (54), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (6), 2 states have call predecessors, (6), 3 states have call successors, (6) [2022-03-17 21:30:13,808 INFO L276 IsEmpty]: Start isEmpty. Operand 1072 states and 1543 transitions. [2022-03-17 21:30:13,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-03-17 21:30:13,809 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 21:30:13,809 INFO L500 BasicCegarLoop]: trace histogram [4, 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] [2022-03-17 21:30:13,825 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-03-17 21:30:14,025 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 21:30:14,025 INFO L403 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 21:30:14,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 21:30:14,026 INFO L85 PathProgramCache]: Analyzing trace with hash -799775801, now seen corresponding path program 2 times [2022-03-17 21:30:14,026 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 21:30:14,026 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [892375050] [2022-03-17 21:30:14,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 21:30:14,026 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 21:30:14,031 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-17 21:30:14,032 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [625424076] [2022-03-17 21:30:14,032 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-17 21:30:14,032 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 21:30:14,032 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 21:30:14,033 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-17 21:30:14,034 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-03-17 21:30:14,088 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-17 21:30:14,089 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-17 21:30:14,089 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 5 conjunts are in the unsatisfiable core [2022-03-17 21:30:14,090 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 21:30:14,140 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-17 21:30:14,140 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-17 21:30:14,140 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 21:30:14,140 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [892375050] [2022-03-17 21:30:14,140 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-17 21:30:14,140 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [625424076] [2022-03-17 21:30:14,140 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [625424076] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-17 21:30:14,140 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-17 21:30:14,141 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-17 21:30:14,141 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [966206364] [2022-03-17 21:30:14,141 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-17 21:30:14,141 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-17 21:30:14,141 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 21:30:14,141 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-17 21:30:14,141 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-17 21:30:14,142 INFO L87 Difference]: Start difference. First operand 1072 states and 1543 transitions. Second operand has 5 states, 5 states have (on average 6.2) internal successors, (31), 5 states have internal predecessors, (31), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-03-17 21:30:14,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 21:30:14,271 INFO L93 Difference]: Finished difference Result 1700 states and 2539 transitions. [2022-03-17 21:30:14,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-17 21:30:14,272 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.2) internal successors, (31), 5 states have internal predecessors, (31), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 44 [2022-03-17 21:30:14,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 21:30:14,276 INFO L225 Difference]: With dead ends: 1700 [2022-03-17 21:30:14,277 INFO L226 Difference]: Without dead ends: 1234 [2022-03-17 21:30:14,278 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-03-17 21:30:14,278 INFO L912 BasicCegarLoop]: 62 mSDtfsCounter, 29 mSDsluCounter, 133 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 195 SdHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-17 21:30:14,279 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [33 Valid, 195 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-17 21:30:14,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1234 states. [2022-03-17 21:30:14,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1234 to 995. [2022-03-17 21:30:14,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 995 states, 660 states have (on average 1.3015151515151515) internal successors, (859), 690 states have internal predecessors, (859), 278 states have call successors, (278), 57 states have call predecessors, (278), 56 states have return successors, (271), 247 states have call predecessors, (271), 271 states have call successors, (271) [2022-03-17 21:30:14,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 995 states to 995 states and 1408 transitions. [2022-03-17 21:30:14,379 INFO L78 Accepts]: Start accepts. Automaton has 995 states and 1408 transitions. Word has length 44 [2022-03-17 21:30:14,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 21:30:14,379 INFO L478 AbstractCegarLoop]: Abstraction has 995 states and 1408 transitions. [2022-03-17 21:30:14,379 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.2) internal successors, (31), 5 states have internal predecessors, (31), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-03-17 21:30:14,379 INFO L276 IsEmpty]: Start isEmpty. Operand 995 states and 1408 transitions. [2022-03-17 21:30:14,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-03-17 21:30:14,380 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 21:30:14,380 INFO L500 BasicCegarLoop]: trace histogram [5, 4, 4, 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, 1, 1, 1] [2022-03-17 21:30:14,398 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-03-17 21:30:14,586 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-03-17 21:30:14,586 INFO L403 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 21:30:14,586 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 21:30:14,586 INFO L85 PathProgramCache]: Analyzing trace with hash -2059301326, now seen corresponding path program 1 times [2022-03-17 21:30:14,586 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 21:30:14,587 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [227745937] [2022-03-17 21:30:14,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 21:30:14,587 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 21:30:14,592 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-17 21:30:14,593 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [501181385] [2022-03-17 21:30:14,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 21:30:14,593 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 21:30:14,593 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 21:30:14,595 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-17 21:30:14,596 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-03-17 21:30:14,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 21:30:14,634 INFO L263 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 57 conjunts are in the unsatisfiable core [2022-03-17 21:30:14,635 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 21:30:15,118 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 20 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-03-17 21:30:15,119 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 21:30:15,681 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 9 proven. 17 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-03-17 21:30:15,681 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 21:30:15,681 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [227745937] [2022-03-17 21:30:15,681 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-17 21:30:15,681 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [501181385] [2022-03-17 21:30:15,681 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [501181385] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-17 21:30:15,681 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-17 21:30:15,681 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 21 [2022-03-17 21:30:15,681 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [888464387] [2022-03-17 21:30:15,681 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-17 21:30:15,682 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-17 21:30:15,682 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 21:30:15,682 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-17 21:30:15,683 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=349, Unknown=0, NotChecked=0, Total=420 [2022-03-17 21:30:15,683 INFO L87 Difference]: Start difference. First operand 995 states and 1408 transitions. Second operand has 21 states, 18 states have (on average 2.9444444444444446) internal successors, (53), 19 states have internal predecessors, (53), 8 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (11), 4 states have call predecessors, (11), 6 states have call successors, (11) [2022-03-17 21:30:20,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 21:30:20,132 INFO L93 Difference]: Finished difference Result 1412 states and 2014 transitions. [2022-03-17 21:30:20,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-03-17 21:30:20,133 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 18 states have (on average 2.9444444444444446) internal successors, (53), 19 states have internal predecessors, (53), 8 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (11), 4 states have call predecessors, (11), 6 states have call successors, (11) Word has length 58 [2022-03-17 21:30:20,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 21:30:20,137 INFO L225 Difference]: With dead ends: 1412 [2022-03-17 21:30:20,137 INFO L226 Difference]: Without dead ends: 1404 [2022-03-17 21:30:20,138 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 95 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 274 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=261, Invalid=1299, Unknown=0, NotChecked=0, Total=1560 [2022-03-17 21:30:20,138 INFO L912 BasicCegarLoop]: 60 mSDtfsCounter, 186 mSDsluCounter, 616 mSDsCounter, 0 mSdLazyCounter, 923 mSolverCounterSat, 251 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 203 SdHoareTripleChecker+Valid, 676 SdHoareTripleChecker+Invalid, 1174 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 251 IncrementalHoareTripleChecker+Valid, 923 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.4s IncrementalHoareTripleChecker+Time [2022-03-17 21:30:20,138 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [203 Valid, 676 Invalid, 1174 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [251 Valid, 923 Invalid, 0 Unknown, 0 Unchecked, 3.4s Time] [2022-03-17 21:30:20,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1404 states. [2022-03-17 21:30:20,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1404 to 1226. [2022-03-17 21:30:20,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1226 states, 845 states have (on average 1.2970414201183431) internal successors, (1096), 864 states have internal predecessors, (1096), 308 states have call successors, (308), 73 states have call predecessors, (308), 72 states have return successors, (303), 288 states have call predecessors, (303), 303 states have call successors, (303) [2022-03-17 21:30:20,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1226 states to 1226 states and 1707 transitions. [2022-03-17 21:30:20,282 INFO L78 Accepts]: Start accepts. Automaton has 1226 states and 1707 transitions. Word has length 58 [2022-03-17 21:30:20,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 21:30:20,282 INFO L478 AbstractCegarLoop]: Abstraction has 1226 states and 1707 transitions. [2022-03-17 21:30:20,283 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 18 states have (on average 2.9444444444444446) internal successors, (53), 19 states have internal predecessors, (53), 8 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (11), 4 states have call predecessors, (11), 6 states have call successors, (11) [2022-03-17 21:30:20,283 INFO L276 IsEmpty]: Start isEmpty. Operand 1226 states and 1707 transitions. [2022-03-17 21:30:20,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-03-17 21:30:20,283 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 21:30:20,283 INFO L500 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 21:30:20,301 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-03-17 21:30:20,499 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-03-17 21:30:20,499 INFO L403 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 21:30:20,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 21:30:20,500 INFO L85 PathProgramCache]: Analyzing trace with hash -1248898955, now seen corresponding path program 1 times [2022-03-17 21:30:20,500 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 21:30:20,500 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1531484732] [2022-03-17 21:30:20,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 21:30:20,500 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 21:30:20,507 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-17 21:30:20,507 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [180839554] [2022-03-17 21:30:20,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 21:30:20,507 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 21:30:20,507 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 21:30:20,511 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-17 21:30:20,512 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-03-17 21:30:20,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 21:30:20,550 INFO L263 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 17 conjunts are in the unsatisfiable core [2022-03-17 21:30:20,551 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 21:30:20,660 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 8 proven. 17 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-03-17 21:30:20,660 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 21:30:20,803 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 8 proven. 17 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-03-17 21:30:20,804 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 21:30:20,804 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1531484732] [2022-03-17 21:30:20,804 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-17 21:30:20,804 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [180839554] [2022-03-17 21:30:20,804 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [180839554] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-17 21:30:20,804 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-17 21:30:20,804 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2022-03-17 21:30:20,804 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2072286742] [2022-03-17 21:30:20,804 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-17 21:30:20,805 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-17 21:30:20,805 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 21:30:20,805 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-17 21:30:20,805 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=181, Unknown=0, NotChecked=0, Total=306 [2022-03-17 21:30:20,805 INFO L87 Difference]: Start difference. First operand 1226 states and 1707 transitions. Second operand has 18 states, 18 states have (on average 3.8333333333333335) internal successors, (69), 18 states have internal predecessors, (69), 6 states have call successors, (16), 5 states have call predecessors, (16), 4 states have return successors, (14), 4 states have call predecessors, (14), 5 states have call successors, (14) [2022-03-17 21:30:21,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 21:30:21,356 INFO L93 Difference]: Finished difference Result 2565 states and 3679 transitions. [2022-03-17 21:30:21,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-03-17 21:30:21,357 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.8333333333333335) internal successors, (69), 18 states have internal predecessors, (69), 6 states have call successors, (16), 5 states have call predecessors, (16), 4 states have return successors, (14), 4 states have call predecessors, (14), 5 states have call successors, (14) Word has length 64 [2022-03-17 21:30:21,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 21:30:21,364 INFO L225 Difference]: With dead ends: 2565 [2022-03-17 21:30:21,364 INFO L226 Difference]: Without dead ends: 2543 [2022-03-17 21:30:21,365 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 111 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=287, Invalid=525, Unknown=0, NotChecked=0, Total=812 [2022-03-17 21:30:21,366 INFO L912 BasicCegarLoop]: 85 mSDtfsCounter, 385 mSDsluCounter, 403 mSDsCounter, 0 mSdLazyCounter, 204 mSolverCounterSat, 201 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 385 SdHoareTripleChecker+Valid, 488 SdHoareTripleChecker+Invalid, 405 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 201 IncrementalHoareTripleChecker+Valid, 204 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-17 21:30:21,366 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [385 Valid, 488 Invalid, 405 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [201 Valid, 204 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-17 21:30:21,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2543 states. [2022-03-17 21:30:21,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2543 to 2406. [2022-03-17 21:30:21,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2406 states, 1658 states have (on average 1.3094089264173703) internal successors, (2171), 1717 states have internal predecessors, (2171), 631 states have call successors, (631), 117 states have call predecessors, (631), 116 states have return successors, (623), 571 states have call predecessors, (623), 623 states have call successors, (623) [2022-03-17 21:30:21,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2406 states to 2406 states and 3425 transitions. [2022-03-17 21:30:21,688 INFO L78 Accepts]: Start accepts. Automaton has 2406 states and 3425 transitions. Word has length 64 [2022-03-17 21:30:21,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 21:30:21,688 INFO L478 AbstractCegarLoop]: Abstraction has 2406 states and 3425 transitions. [2022-03-17 21:30:21,688 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.8333333333333335) internal successors, (69), 18 states have internal predecessors, (69), 6 states have call successors, (16), 5 states have call predecessors, (16), 4 states have return successors, (14), 4 states have call predecessors, (14), 5 states have call successors, (14) [2022-03-17 21:30:21,688 INFO L276 IsEmpty]: Start isEmpty. Operand 2406 states and 3425 transitions. [2022-03-17 21:30:21,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-03-17 21:30:21,689 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 21:30:21,689 INFO L500 BasicCegarLoop]: trace histogram [8, 7, 7, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 21:30:21,705 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-03-17 21:30:21,895 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-03-17 21:30:21,895 INFO L403 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 21:30:21,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 21:30:21,896 INFO L85 PathProgramCache]: Analyzing trace with hash -934249537, now seen corresponding path program 1 times [2022-03-17 21:30:21,896 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 21:30:21,896 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1056501184] [2022-03-17 21:30:21,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 21:30:21,896 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 21:30:21,901 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-17 21:30:21,901 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1920800116] [2022-03-17 21:30:21,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 21:30:21,901 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 21:30:21,902 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 21:30:21,902 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-17 21:30:21,903 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-03-17 21:30:21,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 21:30:21,939 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-17 21:30:21,940 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 21:30:22,088 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 17 proven. 6 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2022-03-17 21:30:22,088 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 21:30:22,205 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 94 trivial. 0 not checked. [2022-03-17 21:30:22,206 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 21:30:22,206 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1056501184] [2022-03-17 21:30:22,206 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-17 21:30:22,206 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1920800116] [2022-03-17 21:30:22,206 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1920800116] provided 1 perfect and 1 imperfect interpolant sequences [2022-03-17 21:30:22,206 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-03-17 21:30:22,206 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [10] total 11 [2022-03-17 21:30:22,206 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1592071818] [2022-03-17 21:30:22,206 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-17 21:30:22,207 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-17 21:30:22,207 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 21:30:22,208 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-17 21:30:22,208 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2022-03-17 21:30:22,208 INFO L87 Difference]: Start difference. First operand 2406 states and 3425 transitions. Second operand has 5 states, 5 states have (on average 4.4) internal successors, (22), 4 states have internal predecessors, (22), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-03-17 21:30:22,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 21:30:22,482 INFO L93 Difference]: Finished difference Result 2467 states and 3485 transitions. [2022-03-17 21:30:22,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-17 21:30:22,483 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.4) internal successors, (22), 4 states have internal predecessors, (22), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 67 [2022-03-17 21:30:22,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 21:30:22,490 INFO L225 Difference]: With dead ends: 2467 [2022-03-17 21:30:22,490 INFO L226 Difference]: Without dead ends: 2465 [2022-03-17 21:30:22,491 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 122 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2022-03-17 21:30:22,491 INFO L912 BasicCegarLoop]: 45 mSDtfsCounter, 12 mSDsluCounter, 108 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 153 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-17 21:30:22,492 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 153 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-17 21:30:22,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2465 states. [2022-03-17 21:30:22,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2465 to 2442. [2022-03-17 21:30:22,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2442 states, 1685 states have (on average 1.3032640949554897) internal successors, (2196), 1744 states have internal predecessors, (2196), 631 states have call successors, (631), 126 states have call predecessors, (631), 125 states have return successors, (623), 571 states have call predecessors, (623), 623 states have call successors, (623) [2022-03-17 21:30:22,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2442 states to 2442 states and 3450 transitions. [2022-03-17 21:30:22,774 INFO L78 Accepts]: Start accepts. Automaton has 2442 states and 3450 transitions. Word has length 67 [2022-03-17 21:30:22,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 21:30:22,774 INFO L478 AbstractCegarLoop]: Abstraction has 2442 states and 3450 transitions. [2022-03-17 21:30:22,774 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.4) internal successors, (22), 4 states have internal predecessors, (22), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-03-17 21:30:22,774 INFO L276 IsEmpty]: Start isEmpty. Operand 2442 states and 3450 transitions. [2022-03-17 21:30:22,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-03-17 21:30:22,775 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 21:30:22,775 INFO L500 BasicCegarLoop]: trace histogram [7, 6, 6, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 21:30:22,791 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-03-17 21:30:22,976 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 21:30:22,977 INFO L403 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 21:30:22,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 21:30:22,977 INFO L85 PathProgramCache]: Analyzing trace with hash -1422612783, now seen corresponding path program 1 times [2022-03-17 21:30:22,977 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 21:30:22,977 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1566162549] [2022-03-17 21:30:22,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 21:30:22,977 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 21:30:22,982 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-17 21:30:22,982 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1648474495] [2022-03-17 21:30:22,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 21:30:22,983 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 21:30:22,983 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 21:30:22,987 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-17 21:30:22,988 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-03-17 21:30:23,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 21:30:23,033 INFO L263 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 4 conjunts are in the unsatisfiable core [2022-03-17 21:30:23,034 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 21:30:23,122 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 51 proven. 0 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2022-03-17 21:30:23,122 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-17 21:30:23,122 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 21:30:23,122 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1566162549] [2022-03-17 21:30:23,122 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-17 21:30:23,122 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1648474495] [2022-03-17 21:30:23,122 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1648474495] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-17 21:30:23,122 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-17 21:30:23,122 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-17 21:30:23,122 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [330871104] [2022-03-17 21:30:23,123 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-17 21:30:23,123 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-17 21:30:23,123 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 21:30:23,123 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-17 21:30:23,123 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-03-17 21:30:23,123 INFO L87 Difference]: Start difference. First operand 2442 states and 3450 transitions. Second operand has 5 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 3 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-03-17 21:30:23,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 21:30:23,506 INFO L93 Difference]: Finished difference Result 4377 states and 6175 transitions. [2022-03-17 21:30:23,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-17 21:30:23,507 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 3 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 73 [2022-03-17 21:30:23,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 21:30:23,514 INFO L225 Difference]: With dead ends: 4377 [2022-03-17 21:30:23,514 INFO L226 Difference]: Without dead ends: 2578 [2022-03-17 21:30:23,520 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-03-17 21:30:23,521 INFO L912 BasicCegarLoop]: 48 mSDtfsCounter, 12 mSDsluCounter, 79 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 127 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-17 21:30:23,521 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 127 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-17 21:30:23,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2578 states. [2022-03-17 21:30:23,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2578 to 2372. [2022-03-17 21:30:23,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2372 states, 1689 states have (on average 1.2948490230905862) internal successors, (2187), 1720 states have internal predecessors, (2187), 559 states have call successors, (559), 124 states have call predecessors, (559), 123 states have return successors, (551), 527 states have call predecessors, (551), 551 states have call successors, (551) [2022-03-17 21:30:23,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2372 states to 2372 states and 3297 transitions. [2022-03-17 21:30:23,806 INFO L78 Accepts]: Start accepts. Automaton has 2372 states and 3297 transitions. Word has length 73 [2022-03-17 21:30:23,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 21:30:23,806 INFO L478 AbstractCegarLoop]: Abstraction has 2372 states and 3297 transitions. [2022-03-17 21:30:23,806 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 3 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-03-17 21:30:23,806 INFO L276 IsEmpty]: Start isEmpty. Operand 2372 states and 3297 transitions. [2022-03-17 21:30:23,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2022-03-17 21:30:23,808 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 21:30:23,808 INFO L500 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 21:30:23,826 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-03-17 21:30:24,023 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 21:30:24,023 INFO L403 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 21:30:24,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 21:30:24,023 INFO L85 PathProgramCache]: Analyzing trace with hash -1662269742, now seen corresponding path program 2 times [2022-03-17 21:30:24,024 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 21:30:24,024 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1403658943] [2022-03-17 21:30:24,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 21:30:24,024 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 21:30:24,029 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-17 21:30:24,029 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1785826440] [2022-03-17 21:30:24,029 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-17 21:30:24,029 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 21:30:24,029 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 21:30:24,030 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-17 21:30:24,041 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-03-17 21:30:24,076 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-17 21:30:24,076 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-17 21:30:24,077 INFO L263 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 82 conjunts are in the unsatisfiable core [2022-03-17 21:30:24,079 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 21:30:25,063 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 20 proven. 43 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2022-03-17 21:30:25,063 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 21:30:26,140 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 36 proven. 21 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2022-03-17 21:30:26,141 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 21:30:26,141 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1403658943] [2022-03-17 21:30:26,141 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-17 21:30:26,141 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1785826440] [2022-03-17 21:30:26,141 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1785826440] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-17 21:30:26,141 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-17 21:30:26,141 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 13] total 28 [2022-03-17 21:30:26,141 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [290383083] [2022-03-17 21:30:26,141 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-17 21:30:26,142 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-03-17 21:30:26,142 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 21:30:26,142 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-03-17 21:30:26,142 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=631, Unknown=0, NotChecked=0, Total=756 [2022-03-17 21:30:26,142 INFO L87 Difference]: Start difference. First operand 2372 states and 3297 transitions. Second operand has 28 states, 26 states have (on average 3.0) internal successors, (78), 22 states have internal predecessors, (78), 9 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (14), 6 states have call predecessors, (14), 7 states have call successors, (14) [2022-03-17 21:30:35,198 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-17 21:30:41,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 21:30:41,428 INFO L93 Difference]: Finished difference Result 2869 states and 3894 transitions. [2022-03-17 21:30:41,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-03-17 21:30:41,428 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 26 states have (on average 3.0) internal successors, (78), 22 states have internal predecessors, (78), 9 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (14), 6 states have call predecessors, (14), 7 states have call successors, (14) Word has length 75 [2022-03-17 21:30:41,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 21:30:41,436 INFO L225 Difference]: With dead ends: 2869 [2022-03-17 21:30:41,436 INFO L226 Difference]: Without dead ends: 2863 [2022-03-17 21:30:41,437 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 129 SyntacticMatches, 2 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 607 ImplicationChecksByTransitivity, 7.1s TimeCoverageRelationStatistics Valid=469, Invalid=1981, Unknown=0, NotChecked=0, Total=2450 [2022-03-17 21:30:41,437 INFO L912 BasicCegarLoop]: 61 mSDtfsCounter, 297 mSDsluCounter, 787 mSDsCounter, 0 mSdLazyCounter, 1024 mSolverCounterSat, 303 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 303 SdHoareTripleChecker+Valid, 848 SdHoareTripleChecker+Invalid, 1328 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 303 IncrementalHoareTripleChecker+Valid, 1024 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.7s IncrementalHoareTripleChecker+Time [2022-03-17 21:30:41,437 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [303 Valid, 848 Invalid, 1328 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [303 Valid, 1024 Invalid, 1 Unknown, 0 Unchecked, 8.7s Time] [2022-03-17 21:30:41,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2863 states. [2022-03-17 21:30:41,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2863 to 2736. [2022-03-17 21:30:41,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2736 states, 1985 states have (on average 1.2916876574307306) internal successors, (2564), 2026 states have internal predecessors, (2564), 594 states have call successors, (594), 158 states have call predecessors, (594), 156 states have return successors, (587), 551 states have call predecessors, (587), 587 states have call successors, (587) [2022-03-17 21:30:41,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2736 states to 2736 states and 3745 transitions. [2022-03-17 21:30:41,760 INFO L78 Accepts]: Start accepts. Automaton has 2736 states and 3745 transitions. Word has length 75 [2022-03-17 21:30:41,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 21:30:41,760 INFO L478 AbstractCegarLoop]: Abstraction has 2736 states and 3745 transitions. [2022-03-17 21:30:41,761 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 26 states have (on average 3.0) internal successors, (78), 22 states have internal predecessors, (78), 9 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (14), 6 states have call predecessors, (14), 7 states have call successors, (14) [2022-03-17 21:30:41,761 INFO L276 IsEmpty]: Start isEmpty. Operand 2736 states and 3745 transitions. [2022-03-17 21:30:41,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2022-03-17 21:30:41,761 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 21:30:41,761 INFO L500 BasicCegarLoop]: trace histogram [9, 8, 8, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 21:30:41,778 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-03-17 21:30:41,972 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2022-03-17 21:30:41,972 INFO L403 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 21:30:41,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 21:30:41,972 INFO L85 PathProgramCache]: Analyzing trace with hash 612727057, now seen corresponding path program 1 times [2022-03-17 21:30:41,972 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 21:30:41,973 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [963073651] [2022-03-17 21:30:41,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 21:30:41,973 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 21:30:41,979 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-17 21:30:41,979 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [586611933] [2022-03-17 21:30:41,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 21:30:41,979 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 21:30:41,980 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 21:30:41,980 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-17 21:30:41,981 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-03-17 21:30:42,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 21:30:42,028 INFO L263 TraceCheckSpWp]: Trace formula consists of 263 conjuncts, 86 conjunts are in the unsatisfiable core [2022-03-17 21:30:42,030 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 21:30:43,150 INFO L134 CoverageAnalysis]: Checked inductivity of 158 backedges. 52 proven. 35 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2022-03-17 21:30:43,150 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 21:30:47,986 INFO L134 CoverageAnalysis]: Checked inductivity of 158 backedges. 65 proven. 19 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2022-03-17 21:30:47,986 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 21:30:47,986 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [963073651] [2022-03-17 21:30:47,986 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-17 21:30:47,986 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [586611933] [2022-03-17 21:30:47,986 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [586611933] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-17 21:30:47,986 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-17 21:30:47,986 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 16] total 30 [2022-03-17 21:30:47,987 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [854166551] [2022-03-17 21:30:47,987 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-17 21:30:47,987 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-03-17 21:30:47,987 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 21:30:47,987 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-03-17 21:30:47,987 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=728, Unknown=0, NotChecked=0, Total=870 [2022-03-17 21:30:47,988 INFO L87 Difference]: Start difference. First operand 2736 states and 3745 transitions. Second operand has 30 states, 25 states have (on average 2.84) internal successors, (71), 26 states have internal predecessors, (71), 11 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (19), 8 states have call predecessors, (19), 9 states have call successors, (19) [2022-03-17 21:30:58,038 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-17 21:31:03,132 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.08s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-17 21:31:19,868 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-17 21:31:27,852 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-17 21:31:38,688 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-17 21:31:40,393 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.70s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-17 21:31:43,023 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-17 21:31:45,025 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-17 21:31:59,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 21:31:59,982 INFO L93 Difference]: Finished difference Result 3624 states and 4993 transitions. [2022-03-17 21:31:59,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2022-03-17 21:31:59,983 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 25 states have (on average 2.84) internal successors, (71), 26 states have internal predecessors, (71), 11 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (19), 8 states have call predecessors, (19), 9 states have call successors, (19) Word has length 88 [2022-03-17 21:31:59,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 21:31:59,994 INFO L225 Difference]: With dead ends: 3624 [2022-03-17 21:31:59,994 INFO L226 Difference]: Without dead ends: 3593 [2022-03-17 21:31:59,996 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 274 GetRequests, 168 SyntacticMatches, 1 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3787 ImplicationChecksByTransitivity, 47.0s TimeCoverageRelationStatistics Valid=1908, Invalid=9434, Unknown=0, NotChecked=0, Total=11342 [2022-03-17 21:31:59,997 INFO L912 BasicCegarLoop]: 88 mSDtfsCounter, 415 mSDsluCounter, 1144 mSDsCounter, 0 mSdLazyCounter, 1540 mSolverCounterSat, 530 mSolverCounterUnsat, 6 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 26.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 415 SdHoareTripleChecker+Valid, 1232 SdHoareTripleChecker+Invalid, 2076 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 530 IncrementalHoareTripleChecker+Valid, 1540 IncrementalHoareTripleChecker+Invalid, 6 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 26.5s IncrementalHoareTripleChecker+Time [2022-03-17 21:31:59,997 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [415 Valid, 1232 Invalid, 2076 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [530 Valid, 1540 Invalid, 6 Unknown, 0 Unchecked, 26.5s Time] [2022-03-17 21:31:59,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3593 states. [2022-03-17 21:32:00,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3593 to 3206. [2022-03-17 21:32:00,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3206 states, 2285 states have (on average 1.3037199124726477) internal successors, (2979), 2334 states have internal predecessors, (2979), 745 states have call successors, (745), 177 states have call predecessors, (745), 175 states have return successors, (738), 694 states have call predecessors, (738), 738 states have call successors, (738) [2022-03-17 21:32:00,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3206 states to 3206 states and 4462 transitions. [2022-03-17 21:32:00,587 INFO L78 Accepts]: Start accepts. Automaton has 3206 states and 4462 transitions. Word has length 88 [2022-03-17 21:32:00,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 21:32:00,587 INFO L478 AbstractCegarLoop]: Abstraction has 3206 states and 4462 transitions. [2022-03-17 21:32:00,588 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 25 states have (on average 2.84) internal successors, (71), 26 states have internal predecessors, (71), 11 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (19), 8 states have call predecessors, (19), 9 states have call successors, (19) [2022-03-17 21:32:00,588 INFO L276 IsEmpty]: Start isEmpty. Operand 3206 states and 4462 transitions. [2022-03-17 21:32:00,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2022-03-17 21:32:00,589 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 21:32:00,589 INFO L500 BasicCegarLoop]: trace histogram [9, 8, 8, 5, 5, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 21:32:00,607 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-03-17 21:32:00,803 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2022-03-17 21:32:00,803 INFO L403 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 21:32:00,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 21:32:00,804 INFO L85 PathProgramCache]: Analyzing trace with hash -1189405093, now seen corresponding path program 3 times [2022-03-17 21:32:00,804 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 21:32:00,804 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1444857138] [2022-03-17 21:32:00,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 21:32:00,804 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 21:32:00,813 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-17 21:32:00,813 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [700849101] [2022-03-17 21:32:00,813 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-17 21:32:00,813 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 21:32:00,813 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 21:32:00,814 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-17 21:32:00,815 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-03-17 21:32:00,868 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-03-17 21:32:00,868 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-17 21:32:00,870 INFO L263 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 41 conjunts are in the unsatisfiable core [2022-03-17 21:32:00,871 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 21:32:01,337 INFO L134 CoverageAnalysis]: Checked inductivity of 186 backedges. 16 proven. 51 refuted. 0 times theorem prover too weak. 119 trivial. 0 not checked. [2022-03-17 21:32:01,337 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 21:32:01,607 INFO L134 CoverageAnalysis]: Checked inductivity of 186 backedges. 16 proven. 51 refuted. 0 times theorem prover too weak. 119 trivial. 0 not checked. [2022-03-17 21:32:01,607 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 21:32:01,607 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1444857138] [2022-03-17 21:32:01,607 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-17 21:32:01,607 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [700849101] [2022-03-17 21:32:01,608 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [700849101] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-17 21:32:01,608 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-17 21:32:01,608 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2022-03-17 21:32:01,608 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1416408629] [2022-03-17 21:32:01,608 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-17 21:32:01,608 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-17 21:32:01,608 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 21:32:01,608 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-17 21:32:01,609 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2022-03-17 21:32:01,609 INFO L87 Difference]: Start difference. First operand 3206 states and 4462 transitions. Second operand has 16 states, 16 states have (on average 5.125) internal successors, (82), 15 states have internal predecessors, (82), 7 states have call successors, (22), 2 states have call predecessors, (22), 1 states have return successors, (19), 5 states have call predecessors, (19), 5 states have call successors, (19) [2022-03-17 21:32:04,008 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-17 21:32:06,952 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.51s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-17 21:32:09,668 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.77s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-17 21:32:10,856 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.19s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-17 21:32:13,179 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.10s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-17 21:32:13,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 21:32:13,807 INFO L93 Difference]: Finished difference Result 3511 states and 4833 transitions. [2022-03-17 21:32:13,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-03-17 21:32:13,808 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 5.125) internal successors, (82), 15 states have internal predecessors, (82), 7 states have call successors, (22), 2 states have call predecessors, (22), 1 states have return successors, (19), 5 states have call predecessors, (19), 5 states have call successors, (19) Word has length 97 [2022-03-17 21:32:13,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 21:32:13,817 INFO L225 Difference]: With dead ends: 3511 [2022-03-17 21:32:13,818 INFO L226 Difference]: Without dead ends: 3507 [2022-03-17 21:32:13,818 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 208 GetRequests, 178 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=201, Invalid=729, Unknown=0, NotChecked=0, Total=930 [2022-03-17 21:32:13,819 INFO L912 BasicCegarLoop]: 68 mSDtfsCounter, 110 mSDsluCounter, 567 mSDsCounter, 0 mSdLazyCounter, 484 mSolverCounterSat, 150 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 635 SdHoareTripleChecker+Invalid, 635 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 150 IncrementalHoareTripleChecker+Valid, 484 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 11.2s IncrementalHoareTripleChecker+Time [2022-03-17 21:32:13,819 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [110 Valid, 635 Invalid, 635 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [150 Valid, 484 Invalid, 1 Unknown, 0 Unchecked, 11.2s Time] [2022-03-17 21:32:13,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3507 states. [2022-03-17 21:32:14,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3507 to 3434. [2022-03-17 21:32:14,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3434 states, 2460 states have (on average 1.3004065040650405) internal successors, (3199), 2510 states have internal predecessors, (3199), 778 states have call successors, (778), 197 states have call predecessors, (778), 195 states have return successors, (772), 726 states have call predecessors, (772), 772 states have call successors, (772) [2022-03-17 21:32:14,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3434 states to 3434 states and 4749 transitions. [2022-03-17 21:32:14,486 INFO L78 Accepts]: Start accepts. Automaton has 3434 states and 4749 transitions. Word has length 97 [2022-03-17 21:32:14,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 21:32:14,487 INFO L478 AbstractCegarLoop]: Abstraction has 3434 states and 4749 transitions. [2022-03-17 21:32:14,487 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 5.125) internal successors, (82), 15 states have internal predecessors, (82), 7 states have call successors, (22), 2 states have call predecessors, (22), 1 states have return successors, (19), 5 states have call predecessors, (19), 5 states have call successors, (19) [2022-03-17 21:32:14,487 INFO L276 IsEmpty]: Start isEmpty. Operand 3434 states and 4749 transitions. [2022-03-17 21:32:14,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2022-03-17 21:32:14,488 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 21:32:14,488 INFO L500 BasicCegarLoop]: trace histogram [9, 8, 8, 5, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 21:32:14,504 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-03-17 21:32:14,703 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 21:32:14,703 INFO L403 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 21:32:14,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 21:32:14,704 INFO L85 PathProgramCache]: Analyzing trace with hash 1037830812, now seen corresponding path program 1 times [2022-03-17 21:32:14,704 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 21:32:14,704 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1681620018] [2022-03-17 21:32:14,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 21:32:14,704 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 21:32:14,709 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-17 21:32:14,709 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1670069564] [2022-03-17 21:32:14,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 21:32:14,710 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 21:32:14,710 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 21:32:14,711 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-17 21:32:14,711 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-03-17 21:32:14,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 21:32:14,760 INFO L263 TraceCheckSpWp]: Trace formula consists of 302 conjuncts, 23 conjunts are in the unsatisfiable core [2022-03-17 21:32:14,762 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 21:32:14,926 INFO L134 CoverageAnalysis]: Checked inductivity of 187 backedges. 27 proven. 108 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2022-03-17 21:32:14,926 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 21:32:15,168 INFO L134 CoverageAnalysis]: Checked inductivity of 187 backedges. 27 proven. 44 refuted. 0 times theorem prover too weak. 116 trivial. 0 not checked. [2022-03-17 21:32:15,169 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 21:32:15,170 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1681620018] [2022-03-17 21:32:15,170 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-17 21:32:15,170 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1670069564] [2022-03-17 21:32:15,170 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1670069564] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-17 21:32:15,170 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-17 21:32:15,170 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2022-03-17 21:32:15,170 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [390814083] [2022-03-17 21:32:15,170 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-17 21:32:15,171 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-17 21:32:15,171 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 21:32:15,171 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-17 21:32:15,172 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=236, Invalid=316, Unknown=0, NotChecked=0, Total=552 [2022-03-17 21:32:15,172 INFO L87 Difference]: Start difference. First operand 3434 states and 4749 transitions. Second operand has 24 states, 24 states have (on average 4.0) internal successors, (96), 24 states have internal predecessors, (96), 8 states have call successors, (24), 6 states have call predecessors, (24), 5 states have return successors, (22), 6 states have call predecessors, (22), 7 states have call successors, (22) [2022-03-17 21:32:17,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 21:32:17,096 INFO L93 Difference]: Finished difference Result 8048 states and 11725 transitions. [2022-03-17 21:32:17,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-03-17 21:32:17,097 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 4.0) internal successors, (96), 24 states have internal predecessors, (96), 8 states have call successors, (24), 6 states have call predecessors, (24), 5 states have return successors, (22), 6 states have call predecessors, (22), 7 states have call successors, (22) Word has length 98 [2022-03-17 21:32:17,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 21:32:17,117 INFO L225 Difference]: With dead ends: 8048 [2022-03-17 21:32:17,117 INFO L226 Difference]: Without dead ends: 6739 [2022-03-17 21:32:17,120 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 212 GetRequests, 173 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 228 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=585, Invalid=1055, Unknown=0, NotChecked=0, Total=1640 [2022-03-17 21:32:17,121 INFO L912 BasicCegarLoop]: 113 mSDtfsCounter, 565 mSDsluCounter, 525 mSDsCounter, 0 mSdLazyCounter, 482 mSolverCounterSat, 285 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 565 SdHoareTripleChecker+Valid, 638 SdHoareTripleChecker+Invalid, 767 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 285 IncrementalHoareTripleChecker+Valid, 482 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-17 21:32:17,121 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [565 Valid, 638 Invalid, 767 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [285 Valid, 482 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-17 21:32:17,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6739 states. [2022-03-17 21:32:18,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6739 to 6480. [2022-03-17 21:32:18,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6480 states, 4330 states have (on average 1.297228637413395) internal successors, (5617), 4367 states have internal predecessors, (5617), 1797 states have call successors, (1797), 354 states have call predecessors, (1797), 352 states have return successors, (1785), 1758 states have call predecessors, (1785), 1785 states have call successors, (1785) [2022-03-17 21:32:18,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6480 states to 6480 states and 9199 transitions. [2022-03-17 21:32:18,571 INFO L78 Accepts]: Start accepts. Automaton has 6480 states and 9199 transitions. Word has length 98 [2022-03-17 21:32:18,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 21:32:18,571 INFO L478 AbstractCegarLoop]: Abstraction has 6480 states and 9199 transitions. [2022-03-17 21:32:18,571 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 4.0) internal successors, (96), 24 states have internal predecessors, (96), 8 states have call successors, (24), 6 states have call predecessors, (24), 5 states have return successors, (22), 6 states have call predecessors, (22), 7 states have call successors, (22) [2022-03-17 21:32:18,571 INFO L276 IsEmpty]: Start isEmpty. Operand 6480 states and 9199 transitions. [2022-03-17 21:32:18,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2022-03-17 21:32:18,573 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 21:32:18,573 INFO L500 BasicCegarLoop]: trace histogram [13, 12, 12, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 21:32:18,589 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2022-03-17 21:32:18,786 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 21:32:18,786 INFO L403 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 21:32:18,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 21:32:18,786 INFO L85 PathProgramCache]: Analyzing trace with hash 2067527905, now seen corresponding path program 2 times [2022-03-17 21:32:18,787 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 21:32:18,787 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [924178809] [2022-03-17 21:32:18,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 21:32:18,787 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 21:32:18,792 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-17 21:32:18,792 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [785841525] [2022-03-17 21:32:18,792 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-17 21:32:18,792 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 21:32:18,793 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 21:32:18,802 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-17 21:32:18,803 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-03-17 21:32:18,853 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-17 21:32:18,853 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-17 21:32:18,855 INFO L263 TraceCheckSpWp]: Trace formula consists of 289 conjuncts, 74 conjunts are in the unsatisfiable core [2022-03-17 21:32:18,857 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 21:32:19,812 INFO L134 CoverageAnalysis]: Checked inductivity of 326 backedges. 93 proven. 46 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2022-03-17 21:32:19,812 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 21:32:21,182 INFO L134 CoverageAnalysis]: Checked inductivity of 326 backedges. 117 proven. 12 refuted. 0 times theorem prover too weak. 197 trivial. 0 not checked. [2022-03-17 21:32:21,183 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 21:32:21,183 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [924178809] [2022-03-17 21:32:21,183 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-17 21:32:21,183 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [785841525] [2022-03-17 21:32:21,183 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [785841525] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-17 21:32:21,183 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-17 21:32:21,183 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13] total 24 [2022-03-17 21:32:21,183 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1316708509] [2022-03-17 21:32:21,183 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-17 21:32:21,184 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-17 21:32:21,184 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 21:32:21,184 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-17 21:32:21,184 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=455, Unknown=0, NotChecked=0, Total=552 [2022-03-17 21:32:21,184 INFO L87 Difference]: Start difference. First operand 6480 states and 9199 transitions. Second operand has 24 states, 20 states have (on average 3.45) internal successors, (69), 21 states have internal predecessors, (69), 11 states have call successors, (26), 2 states have call predecessors, (26), 2 states have return successors, (23), 8 states have call predecessors, (23), 9 states have call successors, (23) [2022-03-17 21:32:26,603 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-17 21:32:30,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 21:32:30,563 INFO L93 Difference]: Finished difference Result 7649 states and 10804 transitions. [2022-03-17 21:32:30,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-03-17 21:32:30,564 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 20 states have (on average 3.45) internal successors, (69), 21 states have internal predecessors, (69), 11 states have call successors, (26), 2 states have call predecessors, (26), 2 states have return successors, (23), 8 states have call predecessors, (23), 9 states have call successors, (23) Word has length 108 [2022-03-17 21:32:30,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 21:32:30,579 INFO L225 Difference]: With dead ends: 7649 [2022-03-17 21:32:30,579 INFO L226 Difference]: Without dead ends: 7593 [2022-03-17 21:32:30,580 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 245 GetRequests, 201 SyntacticMatches, 3 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 365 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=340, Invalid=1466, Unknown=0, NotChecked=0, Total=1806 [2022-03-17 21:32:30,581 INFO L912 BasicCegarLoop]: 77 mSDtfsCounter, 226 mSDsluCounter, 652 mSDsCounter, 0 mSdLazyCounter, 1048 mSolverCounterSat, 392 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 240 SdHoareTripleChecker+Valid, 729 SdHoareTripleChecker+Invalid, 1441 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 392 IncrementalHoareTripleChecker+Valid, 1048 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.5s IncrementalHoareTripleChecker+Time [2022-03-17 21:32:30,581 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [240 Valid, 729 Invalid, 1441 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [392 Valid, 1048 Invalid, 1 Unknown, 0 Unchecked, 4.5s Time] [2022-03-17 21:32:30,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7593 states. [2022-03-17 21:32:32,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7593 to 6898. [2022-03-17 21:32:32,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6898 states, 4540 states have (on average 1.3050660792951543) internal successors, (5925), 4577 states have internal predecessors, (5925), 1980 states have call successors, (1980), 378 states have call predecessors, (1980), 377 states have return successors, (1969), 1942 states have call predecessors, (1969), 1969 states have call successors, (1969) [2022-03-17 21:32:32,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6898 states to 6898 states and 9874 transitions. [2022-03-17 21:32:32,156 INFO L78 Accepts]: Start accepts. Automaton has 6898 states and 9874 transitions. Word has length 108 [2022-03-17 21:32:32,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 21:32:32,156 INFO L478 AbstractCegarLoop]: Abstraction has 6898 states and 9874 transitions. [2022-03-17 21:32:32,157 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 20 states have (on average 3.45) internal successors, (69), 21 states have internal predecessors, (69), 11 states have call successors, (26), 2 states have call predecessors, (26), 2 states have return successors, (23), 8 states have call predecessors, (23), 9 states have call successors, (23) [2022-03-17 21:32:32,157 INFO L276 IsEmpty]: Start isEmpty. Operand 6898 states and 9874 transitions. [2022-03-17 21:32:32,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2022-03-17 21:32:32,158 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 21:32:32,158 INFO L500 BasicCegarLoop]: trace histogram [9, 8, 8, 6, 6, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 21:32:32,176 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2022-03-17 21:32:32,371 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2022-03-17 21:32:32,371 INFO L403 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 21:32:32,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 21:32:32,372 INFO L85 PathProgramCache]: Analyzing trace with hash -55503749, now seen corresponding path program 1 times [2022-03-17 21:32:32,372 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 21:32:32,372 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [81882040] [2022-03-17 21:32:32,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 21:32:32,372 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 21:32:32,377 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-17 21:32:32,378 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [519475970] [2022-03-17 21:32:32,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 21:32:32,378 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 21:32:32,378 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 21:32:32,381 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-17 21:32:32,382 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-03-17 21:32:32,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 21:32:32,436 INFO L263 TraceCheckSpWp]: Trace formula consists of 322 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-17 21:32:32,437 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 21:32:32,638 INFO L134 CoverageAnalysis]: Checked inductivity of 212 backedges. 44 proven. 116 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2022-03-17 21:32:32,638 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 21:32:32,927 INFO L134 CoverageAnalysis]: Checked inductivity of 212 backedges. 44 proven. 52 refuted. 0 times theorem prover too weak. 116 trivial. 0 not checked. [2022-03-17 21:32:32,927 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 21:32:32,927 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [81882040] [2022-03-17 21:32:32,927 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-17 21:32:32,927 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [519475970] [2022-03-17 21:32:32,927 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [519475970] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-17 21:32:32,927 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-17 21:32:32,927 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2022-03-17 21:32:32,927 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [610693873] [2022-03-17 21:32:32,927 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-17 21:32:32,928 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-17 21:32:32,928 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 21:32:32,928 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-17 21:32:32,928 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=281, Invalid=369, Unknown=0, NotChecked=0, Total=650 [2022-03-17 21:32:32,928 INFO L87 Difference]: Start difference. First operand 6898 states and 9874 transitions. Second operand has 26 states, 26 states have (on average 4.076923076923077) internal successors, (106), 26 states have internal predecessors, (106), 8 states have call successors, (24), 6 states have call predecessors, (24), 5 states have return successors, (22), 6 states have call predecessors, (22), 7 states have call successors, (22) [2022-03-17 21:32:35,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 21:32:35,445 INFO L93 Difference]: Finished difference Result 12050 states and 17466 transitions. [2022-03-17 21:32:35,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-03-17 21:32:35,455 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 4.076923076923077) internal successors, (106), 26 states have internal predecessors, (106), 8 states have call successors, (24), 6 states have call predecessors, (24), 5 states have return successors, (22), 6 states have call predecessors, (22), 7 states have call successors, (22) Word has length 105 [2022-03-17 21:32:35,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 21:32:35,472 INFO L225 Difference]: With dead ends: 12050 [2022-03-17 21:32:35,472 INFO L226 Difference]: Without dead ends: 7950 [2022-03-17 21:32:35,480 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 228 GetRequests, 185 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 282 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=708, Invalid=1272, Unknown=0, NotChecked=0, Total=1980 [2022-03-17 21:32:35,481 INFO L912 BasicCegarLoop]: 120 mSDtfsCounter, 684 mSDsluCounter, 646 mSDsCounter, 0 mSdLazyCounter, 431 mSolverCounterSat, 404 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 684 SdHoareTripleChecker+Valid, 766 SdHoareTripleChecker+Invalid, 835 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 404 IncrementalHoareTripleChecker+Valid, 431 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-17 21:32:35,482 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [684 Valid, 766 Invalid, 835 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [404 Valid, 431 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-17 21:32:35,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7950 states. [2022-03-17 21:32:37,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7950 to 7812. [2022-03-17 21:32:37,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7812 states, 5076 states have (on average 1.2220252167060677) internal successors, (6203), 5106 states have internal predecessors, (6203), 2304 states have call successors, (2304), 432 states have call predecessors, (2304), 431 states have return successors, (2291), 2273 states have call predecessors, (2291), 2291 states have call successors, (2291) [2022-03-17 21:32:37,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7812 states to 7812 states and 10798 transitions. [2022-03-17 21:32:37,441 INFO L78 Accepts]: Start accepts. Automaton has 7812 states and 10798 transitions. Word has length 105 [2022-03-17 21:32:37,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 21:32:37,441 INFO L478 AbstractCegarLoop]: Abstraction has 7812 states and 10798 transitions. [2022-03-17 21:32:37,442 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 4.076923076923077) internal successors, (106), 26 states have internal predecessors, (106), 8 states have call successors, (24), 6 states have call predecessors, (24), 5 states have return successors, (22), 6 states have call predecessors, (22), 7 states have call successors, (22) [2022-03-17 21:32:37,442 INFO L276 IsEmpty]: Start isEmpty. Operand 7812 states and 10798 transitions. [2022-03-17 21:32:37,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2022-03-17 21:32:37,445 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 21:32:37,445 INFO L500 BasicCegarLoop]: trace histogram [13, 12, 12, 7, 7, 5, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 21:32:37,461 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2022-03-17 21:32:37,661 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2022-03-17 21:32:37,661 INFO L403 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 21:32:37,662 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 21:32:37,662 INFO L85 PathProgramCache]: Analyzing trace with hash -1765875055, now seen corresponding path program 2 times [2022-03-17 21:32:37,662 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 21:32:37,662 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [356262836] [2022-03-17 21:32:37,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 21:32:37,662 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 21:32:37,671 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-17 21:32:37,671 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [15413323] [2022-03-17 21:32:37,671 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-17 21:32:37,671 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 21:32:37,671 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 21:32:37,674 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-17 21:32:37,675 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-03-17 21:32:37,731 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-17 21:32:37,731 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-17 21:32:37,733 INFO L263 TraceCheckSpWp]: Trace formula consists of 387 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-17 21:32:37,735 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 21:32:38,002 INFO L134 CoverageAnalysis]: Checked inductivity of 411 backedges. 24 proven. 311 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2022-03-17 21:32:38,003 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 21:32:38,396 INFO L134 CoverageAnalysis]: Checked inductivity of 411 backedges. 24 proven. 119 refuted. 0 times theorem prover too weak. 268 trivial. 0 not checked. [2022-03-17 21:32:38,397 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 21:32:38,397 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [356262836] [2022-03-17 21:32:38,397 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-17 21:32:38,397 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [15413323] [2022-03-17 21:32:38,397 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [15413323] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-17 21:32:38,397 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-17 21:32:38,397 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 34 [2022-03-17 21:32:38,397 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1698263146] [2022-03-17 21:32:38,397 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-17 21:32:38,397 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-03-17 21:32:38,397 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 21:32:38,398 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-03-17 21:32:38,398 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=501, Invalid=621, Unknown=0, NotChecked=0, Total=1122 [2022-03-17 21:32:38,398 INFO L87 Difference]: Start difference. First operand 7812 states and 10798 transitions. Second operand has 34 states, 34 states have (on average 3.8529411764705883) internal successors, (131), 34 states have internal predecessors, (131), 10 states have call successors, (32), 7 states have call predecessors, (32), 6 states have return successors, (30), 8 states have call predecessors, (30), 9 states have call successors, (30) [2022-03-17 21:32:42,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 21:32:42,730 INFO L93 Difference]: Finished difference Result 14416 states and 20813 transitions. [2022-03-17 21:32:42,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2022-03-17 21:32:42,730 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 3.8529411764705883) internal successors, (131), 34 states have internal predecessors, (131), 10 states have call successors, (32), 7 states have call predecessors, (32), 6 states have return successors, (30), 8 states have call predecessors, (30), 9 states have call successors, (30) Word has length 132 [2022-03-17 21:32:42,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 21:32:42,762 INFO L225 Difference]: With dead ends: 14416 [2022-03-17 21:32:42,763 INFO L226 Difference]: Without dead ends: 14374 [2022-03-17 21:32:42,767 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 290 GetRequests, 231 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 545 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1327, Invalid=2333, Unknown=0, NotChecked=0, Total=3660 [2022-03-17 21:32:42,768 INFO L912 BasicCegarLoop]: 149 mSDtfsCounter, 1159 mSDsluCounter, 625 mSDsCounter, 0 mSdLazyCounter, 573 mSolverCounterSat, 716 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1159 SdHoareTripleChecker+Valid, 774 SdHoareTripleChecker+Invalid, 1289 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 716 IncrementalHoareTripleChecker+Valid, 573 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-17 21:32:42,768 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [1159 Valid, 774 Invalid, 1289 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [716 Valid, 573 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-17 21:32:42,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14374 states. [2022-03-17 21:32:46,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14374 to 13972. [2022-03-17 21:32:46,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13972 states, 9248 states have (on average 1.2822231833910034) internal successors, (11858), 9377 states have internal predecessors, (11858), 4077 states have call successors, (4077), 647 states have call predecessors, (4077), 646 states have return successors, (4056), 3947 states have call predecessors, (4056), 4056 states have call successors, (4056) [2022-03-17 21:32:46,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13972 states to 13972 states and 19991 transitions. [2022-03-17 21:32:46,217 INFO L78 Accepts]: Start accepts. Automaton has 13972 states and 19991 transitions. Word has length 132 [2022-03-17 21:32:46,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 21:32:46,217 INFO L478 AbstractCegarLoop]: Abstraction has 13972 states and 19991 transitions. [2022-03-17 21:32:46,217 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 3.8529411764705883) internal successors, (131), 34 states have internal predecessors, (131), 10 states have call successors, (32), 7 states have call predecessors, (32), 6 states have return successors, (30), 8 states have call predecessors, (30), 9 states have call successors, (30) [2022-03-17 21:32:46,217 INFO L276 IsEmpty]: Start isEmpty. Operand 13972 states and 19991 transitions. [2022-03-17 21:32:46,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2022-03-17 21:32:46,220 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 21:32:46,220 INFO L500 BasicCegarLoop]: trace histogram [17, 16, 16, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 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] [2022-03-17 21:32:46,239 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2022-03-17 21:32:46,435 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2022-03-17 21:32:46,436 INFO L403 AbstractCegarLoop]: === Iteration 28 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 21:32:46,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 21:32:46,436 INFO L85 PathProgramCache]: Analyzing trace with hash -1118265052, now seen corresponding path program 3 times [2022-03-17 21:32:46,436 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 21:32:46,436 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1944038398] [2022-03-17 21:32:46,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 21:32:46,436 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 21:32:46,442 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-17 21:32:46,442 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1187003212] [2022-03-17 21:32:46,442 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-17 21:32:46,443 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 21:32:46,443 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 21:32:46,444 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-17 21:32:46,445 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-03-17 21:32:46,565 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-03-17 21:32:46,565 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-17 21:32:46,567 INFO L263 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 76 conjunts are in the unsatisfiable core [2022-03-17 21:32:46,569 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 21:32:47,493 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-17 21:32:47,821 INFO L134 CoverageAnalysis]: Checked inductivity of 587 backedges. 90 proven. 51 refuted. 0 times theorem prover too weak. 446 trivial. 0 not checked. [2022-03-17 21:32:47,821 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 21:32:54,300 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-17 21:33:00,018 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 21:33:00,018 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1944038398] [2022-03-17 21:33:00,018 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-17 21:33:00,018 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1187003212] [2022-03-17 21:33:00,018 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1187003212] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-17 21:33:00,018 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-17 21:33:00,018 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2022-03-17 21:33:00,019 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1917399443] [2022-03-17 21:33:00,019 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-03-17 21:33:00,019 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-17 21:33:00,019 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 21:33:00,019 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-17 21:33:00,019 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=466, Unknown=4, NotChecked=0, Total=552 [2022-03-17 21:33:00,019 INFO L87 Difference]: Start difference. First operand 13972 states and 19991 transitions. Second operand has 17 states, 16 states have (on average 3.1875) internal successors, (51), 16 states have internal predecessors, (51), 5 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (15), 5 states have call predecessors, (15), 4 states have call successors, (15) [2022-03-17 21:33:05,527 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-17 21:33:07,530 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-17 21:33:12,198 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-17 21:33:16,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 21:33:16,250 INFO L93 Difference]: Finished difference Result 16140 states and 23077 transitions. [2022-03-17 21:33:16,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-03-17 21:33:16,251 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 3.1875) internal successors, (51), 16 states have internal predecessors, (51), 5 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (15), 5 states have call predecessors, (15), 4 states have call successors, (15) Word has length 138 [2022-03-17 21:33:16,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 21:33:16,285 INFO L225 Difference]: With dead ends: 16140 [2022-03-17 21:33:16,285 INFO L226 Difference]: Without dead ends: 16063 [2022-03-17 21:33:16,290 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 151 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 165 ImplicationChecksByTransitivity, 16.5s TimeCoverageRelationStatistics Valid=172, Invalid=944, Unknown=6, NotChecked=0, Total=1122 [2022-03-17 21:33:16,290 INFO L912 BasicCegarLoop]: 78 mSDtfsCounter, 105 mSDsluCounter, 766 mSDsCounter, 0 mSdLazyCounter, 830 mSolverCounterSat, 100 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 117 SdHoareTripleChecker+Valid, 844 SdHoareTripleChecker+Invalid, 933 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 100 IncrementalHoareTripleChecker+Valid, 830 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.7s IncrementalHoareTripleChecker+Time [2022-03-17 21:33:16,290 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [117 Valid, 844 Invalid, 933 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [100 Valid, 830 Invalid, 3 Unknown, 0 Unchecked, 7.7s Time] [2022-03-17 21:33:16,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16063 states. [2022-03-17 21:33:20,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16063 to 15654. [2022-03-17 21:33:20,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15654 states, 10281 states have (on average 1.2863534675615214) internal successors, (13225), 10424 states have internal predecessors, (13225), 4666 states have call successors, (4666), 707 states have call predecessors, (4666), 706 states have return successors, (4646), 4522 states have call predecessors, (4646), 4646 states have call successors, (4646) [2022-03-17 21:33:20,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15654 states to 15654 states and 22537 transitions. [2022-03-17 21:33:20,144 INFO L78 Accepts]: Start accepts. Automaton has 15654 states and 22537 transitions. Word has length 138 [2022-03-17 21:33:20,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 21:33:20,145 INFO L478 AbstractCegarLoop]: Abstraction has 15654 states and 22537 transitions. [2022-03-17 21:33:20,145 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 3.1875) internal successors, (51), 16 states have internal predecessors, (51), 5 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (15), 5 states have call predecessors, (15), 4 states have call successors, (15) [2022-03-17 21:33:20,145 INFO L276 IsEmpty]: Start isEmpty. Operand 15654 states and 22537 transitions. [2022-03-17 21:33:20,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2022-03-17 21:33:20,148 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 21:33:20,148 INFO L500 BasicCegarLoop]: trace histogram [19, 18, 18, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 21:33:20,165 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2022-03-17 21:33:20,363 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2022-03-17 21:33:20,363 INFO L403 AbstractCegarLoop]: === Iteration 29 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 21:33:20,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 21:33:20,364 INFO L85 PathProgramCache]: Analyzing trace with hash 1010003828, now seen corresponding path program 1 times [2022-03-17 21:33:20,364 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 21:33:20,364 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [815230993] [2022-03-17 21:33:20,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 21:33:20,364 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 21:33:20,370 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-17 21:33:20,370 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1330031392] [2022-03-17 21:33:20,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 21:33:20,370 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 21:33:20,370 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 21:33:20,376 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-17 21:33:20,377 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-03-17 21:33:20,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 21:33:20,437 INFO L263 TraceCheckSpWp]: Trace formula consists of 371 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-17 21:33:20,439 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 21:33:20,752 INFO L134 CoverageAnalysis]: Checked inductivity of 736 backedges. 82 proven. 32 refuted. 0 times theorem prover too weak. 622 trivial. 0 not checked. [2022-03-17 21:33:20,752 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 21:33:20,986 INFO L134 CoverageAnalysis]: Checked inductivity of 736 backedges. 87 proven. 17 refuted. 0 times theorem prover too weak. 632 trivial. 0 not checked. [2022-03-17 21:33:20,987 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 21:33:20,987 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [815230993] [2022-03-17 21:33:20,987 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-17 21:33:20,987 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1330031392] [2022-03-17 21:33:20,987 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1330031392] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-17 21:33:20,987 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-17 21:33:20,987 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7] total 12 [2022-03-17 21:33:20,987 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1997273576] [2022-03-17 21:33:20,987 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-17 21:33:20,988 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-17 21:33:20,988 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 21:33:20,988 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-17 21:33:20,988 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2022-03-17 21:33:20,988 INFO L87 Difference]: Start difference. First operand 15654 states and 22537 transitions. Second operand has 12 states, 12 states have (on average 5.083333333333333) internal successors, (61), 11 states have internal predecessors, (61), 8 states have call successors, (34), 2 states have call predecessors, (34), 1 states have return successors, (31), 8 states have call predecessors, (31), 8 states have call successors, (31) [2022-03-17 21:33:27,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 21:33:27,617 INFO L93 Difference]: Finished difference Result 22199 states and 32022 transitions. [2022-03-17 21:33:27,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-17 21:33:27,618 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 5.083333333333333) internal successors, (61), 11 states have internal predecessors, (61), 8 states have call successors, (34), 2 states have call predecessors, (34), 1 states have return successors, (31), 8 states have call predecessors, (31), 8 states have call successors, (31) Word has length 146 [2022-03-17 21:33:27,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 21:33:27,666 INFO L225 Difference]: With dead ends: 22199 [2022-03-17 21:33:27,666 INFO L226 Difference]: Without dead ends: 22159 [2022-03-17 21:33:27,673 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 304 GetRequests, 285 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=85, Invalid=257, Unknown=0, NotChecked=0, Total=342 [2022-03-17 21:33:27,673 INFO L912 BasicCegarLoop]: 84 mSDtfsCounter, 75 mSDsluCounter, 374 mSDsCounter, 0 mSdLazyCounter, 274 mSolverCounterSat, 70 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 458 SdHoareTripleChecker+Invalid, 344 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 70 IncrementalHoareTripleChecker+Valid, 274 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-17 21:33:27,674 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [75 Valid, 458 Invalid, 344 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [70 Valid, 274 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-03-17 21:33:27,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22159 states. [2022-03-17 21:33:31,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22159 to 15635. [2022-03-17 21:33:31,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15635 states, 10319 states have (on average 1.278806085861033) internal successors, (13196), 10442 states have internal predecessors, (13196), 4552 states have call successors, (4552), 765 states have call predecessors, (4552), 763 states have return successors, (4550), 4427 states have call predecessors, (4550), 4550 states have call successors, (4550) [2022-03-17 21:33:31,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15635 states to 15635 states and 22298 transitions. [2022-03-17 21:33:31,934 INFO L78 Accepts]: Start accepts. Automaton has 15635 states and 22298 transitions. Word has length 146 [2022-03-17 21:33:31,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 21:33:31,935 INFO L478 AbstractCegarLoop]: Abstraction has 15635 states and 22298 transitions. [2022-03-17 21:33:31,935 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 5.083333333333333) internal successors, (61), 11 states have internal predecessors, (61), 8 states have call successors, (34), 2 states have call predecessors, (34), 1 states have return successors, (31), 8 states have call predecessors, (31), 8 states have call successors, (31) [2022-03-17 21:33:31,935 INFO L276 IsEmpty]: Start isEmpty. Operand 15635 states and 22298 transitions. [2022-03-17 21:33:31,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2022-03-17 21:33:31,938 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 21:33:31,938 INFO L500 BasicCegarLoop]: trace histogram [17, 16, 16, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 21:33:31,955 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2022-03-17 21:33:32,151 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2022-03-17 21:33:32,151 INFO L403 AbstractCegarLoop]: === Iteration 30 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 21:33:32,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 21:33:32,152 INFO L85 PathProgramCache]: Analyzing trace with hash -1657425713, now seen corresponding path program 4 times [2022-03-17 21:33:32,152 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 21:33:32,152 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [226173914] [2022-03-17 21:33:32,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 21:33:32,152 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 21:33:32,157 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-17 21:33:32,158 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [195588170] [2022-03-17 21:33:32,158 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-17 21:33:32,158 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 21:33:32,158 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 21:33:32,160 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-17 21:33:32,160 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-03-17 21:33:32,219 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-17 21:33:32,219 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-17 21:33:32,221 INFO L263 TraceCheckSpWp]: Trace formula consists of 349 conjuncts, 100 conjunts are in the unsatisfiable core [2022-03-17 21:33:32,224 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 21:33:33,432 INFO L134 CoverageAnalysis]: Checked inductivity of 610 backedges. 95 proven. 148 refuted. 0 times theorem prover too weak. 367 trivial. 0 not checked. [2022-03-17 21:33:33,432 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 21:33:33,950 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-17 21:33:37,056 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 21:33:37,056 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [226173914] [2022-03-17 21:33:37,056 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-17 21:33:37,056 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [195588170] [2022-03-17 21:33:37,057 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [195588170] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-17 21:33:37,057 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-17 21:33:37,057 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2022-03-17 21:33:37,057 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [71815001] [2022-03-17 21:33:37,057 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-03-17 21:33:37,057 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-17 21:33:37,057 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 21:33:37,057 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-17 21:33:37,058 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=576, Unknown=0, NotChecked=0, Total=650 [2022-03-17 21:33:37,058 INFO L87 Difference]: Start difference. First operand 15635 states and 22298 transitions. Second operand has 21 states, 20 states have (on average 3.0) internal successors, (60), 20 states have internal predecessors, (60), 7 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (19), 6 states have call predecessors, (19), 6 states have call successors, (19) [2022-03-17 21:33:42,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 21:33:42,867 INFO L93 Difference]: Finished difference Result 17041 states and 24194 transitions. [2022-03-17 21:33:42,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-03-17 21:33:42,868 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 3.0) internal successors, (60), 20 states have internal predecessors, (60), 7 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (19), 6 states have call predecessors, (19), 6 states have call successors, (19) Word has length 145 [2022-03-17 21:33:42,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 21:33:42,898 INFO L225 Difference]: With dead ends: 17041 [2022-03-17 21:33:42,898 INFO L226 Difference]: Without dead ends: 17036 [2022-03-17 21:33:42,903 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 142 SyntacticMatches, 2 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 214 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=161, Invalid=1321, Unknown=0, NotChecked=0, Total=1482 [2022-03-17 21:33:42,904 INFO L912 BasicCegarLoop]: 99 mSDtfsCounter, 129 mSDsluCounter, 1380 mSDsCounter, 0 mSdLazyCounter, 1583 mSolverCounterSat, 100 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 145 SdHoareTripleChecker+Valid, 1479 SdHoareTripleChecker+Invalid, 1683 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 100 IncrementalHoareTripleChecker+Valid, 1583 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-03-17 21:33:42,904 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [145 Valid, 1479 Invalid, 1683 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [100 Valid, 1583 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-03-17 21:33:42,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17036 states. [2022-03-17 21:33:47,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17036 to 16456. [2022-03-17 21:33:47,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16456 states, 10803 states have (on average 1.2801073775803018) internal successors, (13829), 10931 states have internal predecessors, (13829), 4828 states have call successors, (4828), 826 states have call predecessors, (4828), 824 states have return successors, (4826), 4698 states have call predecessors, (4826), 4826 states have call successors, (4826) [2022-03-17 21:33:47,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16456 states to 16456 states and 23483 transitions. [2022-03-17 21:33:47,263 INFO L78 Accepts]: Start accepts. Automaton has 16456 states and 23483 transitions. Word has length 145 [2022-03-17 21:33:47,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 21:33:47,263 INFO L478 AbstractCegarLoop]: Abstraction has 16456 states and 23483 transitions. [2022-03-17 21:33:47,263 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 3.0) internal successors, (60), 20 states have internal predecessors, (60), 7 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (19), 6 states have call predecessors, (19), 6 states have call successors, (19) [2022-03-17 21:33:47,263 INFO L276 IsEmpty]: Start isEmpty. Operand 16456 states and 23483 transitions. [2022-03-17 21:33:47,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2022-03-17 21:33:47,268 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 21:33:47,268 INFO L500 BasicCegarLoop]: trace histogram [21, 20, 20, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 21:33:47,285 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2022-03-17 21:33:47,485 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 21:33:47,485 INFO L403 AbstractCegarLoop]: === Iteration 31 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 21:33:47,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 21:33:47,486 INFO L85 PathProgramCache]: Analyzing trace with hash 1291712014, now seen corresponding path program 5 times [2022-03-17 21:33:47,486 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 21:33:47,486 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [670402342] [2022-03-17 21:33:47,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 21:33:47,486 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 21:33:47,491 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-17 21:33:47,492 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [508053278] [2022-03-17 21:33:47,492 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-17 21:33:47,492 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 21:33:47,492 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 21:33:47,493 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-17 21:33:47,494 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2022-03-17 21:33:47,715 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2022-03-17 21:33:47,715 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-17 21:33:47,718 INFO L263 TraceCheckSpWp]: Trace formula consists of 411 conjuncts, 95 conjunts are in the unsatisfiable core [2022-03-17 21:33:47,720 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 21:33:49,343 INFO L134 CoverageAnalysis]: Checked inductivity of 903 backedges. 77 proven. 170 refuted. 0 times theorem prover too weak. 656 trivial. 0 not checked. [2022-03-17 21:33:49,343 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 21:33:56,088 INFO L134 CoverageAnalysis]: Checked inductivity of 903 backedges. 128 proven. 115 refuted. 0 times theorem prover too weak. 660 trivial. 0 not checked. [2022-03-17 21:33:56,088 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 21:33:56,088 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [670402342] [2022-03-17 21:33:56,088 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-17 21:33:56,088 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [508053278] [2022-03-17 21:33:56,088 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [508053278] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-17 21:33:56,088 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-17 21:33:56,088 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 18] total 33 [2022-03-17 21:33:56,088 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1862031206] [2022-03-17 21:33:56,088 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-17 21:33:56,089 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-03-17 21:33:56,089 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 21:33:56,089 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-03-17 21:33:56,089 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=165, Invalid=891, Unknown=0, NotChecked=0, Total=1056 [2022-03-17 21:33:56,089 INFO L87 Difference]: Start difference. First operand 16456 states and 23483 transitions. Second operand has 33 states, 31 states have (on average 3.129032258064516) internal successors, (97), 31 states have internal predecessors, (97), 13 states have call successors, (44), 2 states have call predecessors, (44), 2 states have return successors, (42), 11 states have call predecessors, (42), 11 states have call successors, (42) [2022-03-17 21:34:00,520 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.09s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-17 21:34:08,445 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-17 21:34:11,291 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-17 21:34:15,198 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-17 21:34:19,052 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.44s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-17 21:34:22,423 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.51s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-17 21:34:27,279 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-17 21:34:31,782 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.30s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-17 21:34:37,427 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.22s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-17 21:34:42,308 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-17 21:34:49,841 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-17 21:35:18,411 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-17 21:35:21,699 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-17 21:35:26,471 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-17 21:35:35,942 WARN L232 SmtUtils]: Spent 5.99s on a formula simplification. DAG size of input: 105 DAG size of output: 101 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-17 21:36:12,733 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-17 21:36:18,504 WARN L232 SmtUtils]: Spent 5.55s on a formula simplification. DAG size of input: 114 DAG size of output: 110 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-17 21:36:31,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 21:36:31,181 INFO L93 Difference]: Finished difference Result 25628 states and 37420 transitions. [2022-03-17 21:36:31,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2022-03-17 21:36:31,182 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 31 states have (on average 3.129032258064516) internal successors, (97), 31 states have internal predecessors, (97), 13 states have call successors, (44), 2 states have call predecessors, (44), 2 states have return successors, (42), 11 states have call predecessors, (42), 11 states have call successors, (42) Word has length 161 [2022-03-17 21:36:31,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 21:36:31,232 INFO L225 Difference]: With dead ends: 25628 [2022-03-17 21:36:31,232 INFO L226 Difference]: Without dead ends: 25622 [2022-03-17 21:36:31,240 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 451 GetRequests, 334 SyntacticMatches, 2 SemanticMatches, 115 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4244 ImplicationChecksByTransitivity, 90.4s TimeCoverageRelationStatistics Valid=2450, Invalid=11122, Unknown=0, NotChecked=0, Total=13572 [2022-03-17 21:36:31,241 INFO L912 BasicCegarLoop]: 129 mSDtfsCounter, 520 mSDsluCounter, 1743 mSDsCounter, 0 mSdLazyCounter, 2828 mSolverCounterSat, 963 mSolverCounterUnsat, 11 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 60.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 529 SdHoareTripleChecker+Valid, 1872 SdHoareTripleChecker+Invalid, 3802 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 963 IncrementalHoareTripleChecker+Valid, 2828 IncrementalHoareTripleChecker+Invalid, 11 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 60.7s IncrementalHoareTripleChecker+Time [2022-03-17 21:36:31,241 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [529 Valid, 1872 Invalid, 3802 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [963 Valid, 2828 Invalid, 11 Unknown, 0 Unchecked, 60.7s Time] [2022-03-17 21:36:31,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25622 states. [2022-03-17 21:36:39,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25622 to 20520. [2022-03-17 21:36:39,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20520 states, 13346 states have (on average 1.30128877566312) internal successors, (17367), 13503 states have internal predecessors, (17367), 6246 states have call successors, (6246), 929 states have call predecessors, (6246), 927 states have return successors, (6244), 6087 states have call predecessors, (6244), 6244 states have call successors, (6244) [2022-03-17 21:36:39,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20520 states to 20520 states and 29857 transitions. [2022-03-17 21:36:39,219 INFO L78 Accepts]: Start accepts. Automaton has 20520 states and 29857 transitions. Word has length 161 [2022-03-17 21:36:39,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 21:36:39,219 INFO L478 AbstractCegarLoop]: Abstraction has 20520 states and 29857 transitions. [2022-03-17 21:36:39,219 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 31 states have (on average 3.129032258064516) internal successors, (97), 31 states have internal predecessors, (97), 13 states have call successors, (44), 2 states have call predecessors, (44), 2 states have return successors, (42), 11 states have call predecessors, (42), 11 states have call successors, (42) [2022-03-17 21:36:39,219 INFO L276 IsEmpty]: Start isEmpty. Operand 20520 states and 29857 transitions. [2022-03-17 21:36:39,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2022-03-17 21:36:39,224 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 21:36:39,224 INFO L500 BasicCegarLoop]: trace histogram [21, 20, 20, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 21:36:39,233 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2022-03-17 21:36:39,428 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2022-03-17 21:36:39,429 INFO L403 AbstractCegarLoop]: === Iteration 32 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 21:36:39,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 21:36:39,429 INFO L85 PathProgramCache]: Analyzing trace with hash 2087386651, now seen corresponding path program 6 times [2022-03-17 21:36:39,429 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 21:36:39,429 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1222933703] [2022-03-17 21:36:39,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 21:36:39,429 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 21:36:39,438 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-17 21:36:39,438 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1007914108] [2022-03-17 21:36:39,438 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-17 21:36:39,438 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 21:36:39,438 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 21:36:39,439 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-17 21:36:39,440 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2022-03-17 21:36:39,530 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2022-03-17 21:36:39,530 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-17 21:36:39,531 INFO L263 TraceCheckSpWp]: Trace formula consists of 421 conjuncts, 6 conjunts are in the unsatisfiable core [2022-03-17 21:36:39,533 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 21:36:39,766 INFO L134 CoverageAnalysis]: Checked inductivity of 917 backedges. 368 proven. 21 refuted. 0 times theorem prover too weak. 528 trivial. 0 not checked. [2022-03-17 21:36:39,766 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 21:36:39,988 INFO L134 CoverageAnalysis]: Checked inductivity of 917 backedges. 120 proven. 21 refuted. 0 times theorem prover too weak. 776 trivial. 0 not checked. [2022-03-17 21:36:39,989 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 21:36:39,989 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1222933703] [2022-03-17 21:36:39,989 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-17 21:36:39,989 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1007914108] [2022-03-17 21:36:39,989 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1007914108] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-17 21:36:39,989 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-17 21:36:39,989 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2022-03-17 21:36:39,989 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1814137526] [2022-03-17 21:36:39,989 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-17 21:36:39,989 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-17 21:36:39,990 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 21:36:39,990 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-17 21:36:39,990 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2022-03-17 21:36:39,990 INFO L87 Difference]: Start difference. First operand 20520 states and 29857 transitions. Second operand has 8 states, 8 states have (on average 6.75) internal successors, (54), 8 states have internal predecessors, (54), 5 states have call successors, (29), 2 states have call predecessors, (29), 2 states have return successors, (27), 5 states have call predecessors, (27), 5 states have call successors, (27) [2022-03-17 21:36:50,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 21:36:50,170 INFO L93 Difference]: Finished difference Result 41849 states and 61569 transitions. [2022-03-17 21:36:50,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-17 21:36:50,171 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.75) internal successors, (54), 8 states have internal predecessors, (54), 5 states have call successors, (29), 2 states have call predecessors, (29), 2 states have return successors, (27), 5 states have call predecessors, (27), 5 states have call successors, (27) Word has length 165 [2022-03-17 21:36:50,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 21:36:50,224 INFO L225 Difference]: With dead ends: 41849 [2022-03-17 21:36:50,224 INFO L226 Difference]: Without dead ends: 26585 [2022-03-17 21:36:50,254 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 336 GetRequests, 324 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2022-03-17 21:36:50,254 INFO L912 BasicCegarLoop]: 76 mSDtfsCounter, 32 mSDsluCounter, 256 mSDsCounter, 0 mSdLazyCounter, 136 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 332 SdHoareTripleChecker+Invalid, 158 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 136 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-17 21:36:50,254 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [32 Valid, 332 Invalid, 158 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 136 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-17 21:36:50,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26585 states. [2022-03-17 21:36:59,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26585 to 24182. [2022-03-17 21:36:59,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24182 states, 15786 states have (on average 1.3231977701761055) internal successors, (20888), 16110 states have internal predecessors, (20888), 7513 states have call successors, (7513), 884 states have call predecessors, (7513), 882 states have return successors, (7511), 7187 states have call predecessors, (7511), 7511 states have call successors, (7511) [2022-03-17 21:37:00,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24182 states to 24182 states and 35912 transitions. [2022-03-17 21:37:00,008 INFO L78 Accepts]: Start accepts. Automaton has 24182 states and 35912 transitions. Word has length 165 [2022-03-17 21:37:00,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 21:37:00,008 INFO L478 AbstractCegarLoop]: Abstraction has 24182 states and 35912 transitions. [2022-03-17 21:37:00,008 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.75) internal successors, (54), 8 states have internal predecessors, (54), 5 states have call successors, (29), 2 states have call predecessors, (29), 2 states have return successors, (27), 5 states have call predecessors, (27), 5 states have call successors, (27) [2022-03-17 21:37:00,008 INFO L276 IsEmpty]: Start isEmpty. Operand 24182 states and 35912 transitions. [2022-03-17 21:37:00,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 189 [2022-03-17 21:37:00,014 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 21:37:00,014 INFO L500 BasicCegarLoop]: trace histogram [25, 24, 24, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 21:37:00,031 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2022-03-17 21:37:00,223 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 21:37:00,223 INFO L403 AbstractCegarLoop]: === Iteration 33 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 21:37:00,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 21:37:00,224 INFO L85 PathProgramCache]: Analyzing trace with hash 1051070357, now seen corresponding path program 7 times [2022-03-17 21:37:00,224 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 21:37:00,224 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1061392193] [2022-03-17 21:37:00,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 21:37:00,224 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 21:37:00,230 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-17 21:37:00,230 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [703048125] [2022-03-17 21:37:00,230 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-17 21:37:00,230 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 21:37:00,230 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 21:37:00,231 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-17 21:37:00,232 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2022-03-17 21:37:00,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 21:37:00,306 INFO L263 TraceCheckSpWp]: Trace formula consists of 467 conjuncts, 113 conjunts are in the unsatisfiable core [2022-03-17 21:37:00,308 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 21:37:00,647 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-17 21:37:00,648 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-17 21:37:03,711 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-17 21:37:03,714 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-17 21:37:06,756 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-17 21:37:08,874 INFO L134 CoverageAnalysis]: Checked inductivity of 1304 backedges. 193 proven. 288 refuted. 0 times theorem prover too weak. 823 trivial. 0 not checked. [2022-03-17 21:37:08,874 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 21:37:11,600 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-17 21:37:12,910 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 21:37:12,910 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1061392193] [2022-03-17 21:37:12,910 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-17 21:37:12,910 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [703048125] [2022-03-17 21:37:12,910 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [703048125] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-17 21:37:12,910 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-17 21:37:12,910 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2022-03-17 21:37:12,910 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [919886192] [2022-03-17 21:37:12,910 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-03-17 21:37:12,911 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-17 21:37:12,911 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 21:37:12,911 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-17 21:37:12,911 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=981, Unknown=0, NotChecked=0, Total=1122 [2022-03-17 21:37:12,911 INFO L87 Difference]: Start difference. First operand 24182 states and 35912 transitions. Second operand has 26 states, 24 states have (on average 2.625) internal successors, (63), 22 states have internal predecessors, (63), 10 states have call successors, (29), 2 states have call predecessors, (29), 2 states have return successors, (27), 10 states have call predecessors, (27), 9 states have call successors, (27) [2022-03-17 21:37:15,731 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-17 21:37:17,735 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-17 21:37:21,376 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-17 21:37:39,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 21:37:39,602 INFO L93 Difference]: Finished difference Result 25252 states and 37470 transitions. [2022-03-17 21:37:39,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-03-17 21:37:39,604 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 24 states have (on average 2.625) internal successors, (63), 22 states have internal predecessors, (63), 10 states have call successors, (29), 2 states have call predecessors, (29), 2 states have return successors, (27), 10 states have call predecessors, (27), 9 states have call successors, (27) Word has length 188 [2022-03-17 21:37:39,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 21:37:39,651 INFO L225 Difference]: With dead ends: 25252 [2022-03-17 21:37:39,651 INFO L226 Difference]: Without dead ends: 25247 [2022-03-17 21:37:39,658 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 239 GetRequests, 191 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 469 ImplicationChecksByTransitivity, 13.3s TimeCoverageRelationStatistics Valid=272, Invalid=2080, Unknown=0, NotChecked=0, Total=2352 [2022-03-17 21:37:39,658 INFO L912 BasicCegarLoop]: 97 mSDtfsCounter, 114 mSDsluCounter, 1633 mSDsCounter, 0 mSdLazyCounter, 1761 mSolverCounterSat, 94 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 134 SdHoareTripleChecker+Valid, 1730 SdHoareTripleChecker+Invalid, 2018 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 94 IncrementalHoareTripleChecker+Valid, 1761 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 160 IncrementalHoareTripleChecker+Unchecked, 10.9s IncrementalHoareTripleChecker+Time [2022-03-17 21:37:39,658 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [134 Valid, 1730 Invalid, 2018 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [94 Valid, 1761 Invalid, 3 Unknown, 160 Unchecked, 10.9s Time] [2022-03-17 21:37:39,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25247 states. [2022-03-17 21:37:49,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25247 to 25080. [2022-03-17 21:37:49,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25080 states, 16334 states have (on average 1.3250275498959225) internal successors, (21643), 16673 states have internal predecessors, (21643), 7815 states have call successors, (7815), 932 states have call predecessors, (7815), 930 states have return successors, (7813), 7474 states have call predecessors, (7813), 7813 states have call successors, (7813) [2022-03-17 21:37:49,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25080 states to 25080 states and 37271 transitions. [2022-03-17 21:37:49,913 INFO L78 Accepts]: Start accepts. Automaton has 25080 states and 37271 transitions. Word has length 188 [2022-03-17 21:37:49,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 21:37:49,913 INFO L478 AbstractCegarLoop]: Abstraction has 25080 states and 37271 transitions. [2022-03-17 21:37:49,914 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 24 states have (on average 2.625) internal successors, (63), 22 states have internal predecessors, (63), 10 states have call successors, (29), 2 states have call predecessors, (29), 2 states have return successors, (27), 10 states have call predecessors, (27), 9 states have call successors, (27) [2022-03-17 21:37:49,914 INFO L276 IsEmpty]: Start isEmpty. Operand 25080 states and 37271 transitions. [2022-03-17 21:37:49,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 192 [2022-03-17 21:37:49,919 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 21:37:49,919 INFO L500 BasicCegarLoop]: trace histogram [25, 24, 24, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 21:37:49,936 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2022-03-17 21:37:50,120 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 21:37:50,120 INFO L403 AbstractCegarLoop]: === Iteration 34 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 21:37:50,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 21:37:50,120 INFO L85 PathProgramCache]: Analyzing trace with hash 97599183, now seen corresponding path program 8 times [2022-03-17 21:37:50,120 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 21:37:50,121 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1635857631] [2022-03-17 21:37:50,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 21:37:50,121 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 21:37:50,128 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-17 21:37:50,128 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1809346597] [2022-03-17 21:37:50,128 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-17 21:37:50,129 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 21:37:50,129 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 21:37:50,130 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-17 21:37:50,131 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2022-03-17 21:37:50,205 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-17 21:37:50,205 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-17 21:37:50,208 INFO L263 TraceCheckSpWp]: Trace formula consists of 487 conjuncts, 113 conjunts are in the unsatisfiable core [2022-03-17 21:37:50,211 INFO L286 TraceCheckSpWp]: Computing forward predicates...