/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/reducercommutativity/sep60-2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-d966a43 [2022-01-30 22:13:37,243 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-30 22:13:37,245 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-30 22:13:37,282 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-01-30 22:13:37,334 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2022-01-30 22:13:37,365 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-30 22:13:37,365 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-30 22:13:37,366 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-01-30 22:13:37,366 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-01-30 22:13:37,367 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-01-30 22:13:37,367 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-01-30 22:13:37,367 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-01-30 22:13:37,367 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-01-30 22:13:37,368 INFO L138 SettingsManager]: * Use SBE=true [2022-01-30 22:13:37,368 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-30 22:13:37,368 INFO L138 SettingsManager]: * sizeof long=4 [2022-01-30 22:13:37,369 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-30 22:13:37,369 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-01-30 22:13:37,369 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-30 22:13:37,369 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-30 22:13:37,369 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-30 22:13:37,369 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-30 22:13:37,370 INFO L138 SettingsManager]: * sizeof long double=12 [2022-01-30 22:13:37,370 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-30 22:13:37,371 INFO L138 SettingsManager]: * Use constant arrays=true [2022-01-30 22:13:37,371 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-30 22:13:37,375 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-30 22:13:37,375 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-30 22:13:37,376 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-30 22:13:37,376 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-30 22:13:37,376 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-30 22:13:37,376 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-01-30 22:13:37,376 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-01-30 22:13:37,377 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-01-30 22:13:37,377 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-01-30 22:13:37,377 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-01-30 22:13:37,377 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-01-30 22:13:37,377 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-01-30 22:13:37,377 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-01-30 22:13:37,549 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-30 22:13:37,565 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-30 22:13:37,566 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-30 22:13:37,567 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-30 22:13:37,567 INFO L275 PluginConnector]: CDTParser initialized [2022-01-30 22:13:37,568 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/reducercommutativity/sep60-2.i [2022-01-30 22:13:37,635 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a2745be7c/c594c5ac86394666ba1d75c4fa196c63/FLAG8f7f9eaa3 [2022-01-30 22:13:37,984 INFO L306 CDTParser]: Found 1 translation units. [2022-01-30 22:13:37,985 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/reducercommutativity/sep60-2.i [2022-01-30 22:13:37,989 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a2745be7c/c594c5ac86394666ba1d75c4fa196c63/FLAG8f7f9eaa3 [2022-01-30 22:13:38,001 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a2745be7c/c594c5ac86394666ba1d75c4fa196c63 [2022-01-30 22:13:38,004 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-30 22:13:38,005 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-01-30 22:13:38,006 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-30 22:13:38,006 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-30 22:13:38,009 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-30 22:13:38,009 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.01 10:13:38" (1/1) ... [2022-01-30 22:13:38,010 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5bc9f8ff and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.01 10:13:38, skipping insertion in model container [2022-01-30 22:13:38,011 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.01 10:13:38" (1/1) ... [2022-01-30 22:13:38,016 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-30 22:13:38,028 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-30 22:13:38,235 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/reducercommutativity/sep60-2.i[1293,1306] [2022-01-30 22:13:38,238 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-30 22:13:38,249 INFO L203 MainTranslator]: Completed pre-run [2022-01-30 22:13:38,277 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/reducercommutativity/sep60-2.i[1293,1306] [2022-01-30 22:13:38,278 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-30 22:13:38,289 INFO L208 MainTranslator]: Completed translation [2022-01-30 22:13:38,289 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.01 10:13:38 WrapperNode [2022-01-30 22:13:38,290 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-30 22:13:38,290 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-30 22:13:38,291 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-30 22:13:38,291 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-30 22:13:38,300 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.01 10:13:38" (1/1) ... [2022-01-30 22:13:38,300 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.01 10:13:38" (1/1) ... [2022-01-30 22:13:38,305 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.01 10:13:38" (1/1) ... [2022-01-30 22:13:38,305 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.01 10:13:38" (1/1) ... [2022-01-30 22:13:38,311 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.01 10:13:38" (1/1) ... [2022-01-30 22:13:38,315 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.01 10:13:38" (1/1) ... [2022-01-30 22:13:38,316 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.01 10:13:38" (1/1) ... [2022-01-30 22:13:38,318 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-30 22:13:38,319 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-30 22:13:38,319 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-30 22:13:38,319 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-30 22:13:38,320 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.01 10:13:38" (1/1) ... [2022-01-30 22:13:38,326 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-30 22:13:38,335 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-30 22:13:38,346 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) [2022-01-30 22:13:38,372 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 [2022-01-30 22:13:38,392 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-01-30 22:13:38,392 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-30 22:13:38,393 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-01-30 22:13:38,393 INFO L138 BoogieDeclarations]: Found implementation of procedure sep [2022-01-30 22:13:38,393 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-01-30 22:13:38,393 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-01-30 22:13:38,393 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-01-30 22:13:38,393 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2022-01-30 22:13:38,393 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2022-01-30 22:13:38,394 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-01-30 22:13:38,394 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-30 22:13:38,394 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-01-30 22:13:38,394 INFO L130 BoogieDeclarations]: Found specification of procedure sep [2022-01-30 22:13:38,394 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-01-30 22:13:38,394 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-01-30 22:13:38,394 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-01-30 22:13:38,394 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-01-30 22:13:38,395 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-01-30 22:13:38,395 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-01-30 22:13:38,395 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-01-30 22:13:38,395 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-30 22:13:38,455 INFO L234 CfgBuilder]: Building ICFG [2022-01-30 22:13:38,456 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-30 22:13:38,581 INFO L275 CfgBuilder]: Performing block encoding [2022-01-30 22:13:38,586 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-30 22:13:38,587 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2022-01-30 22:13:38,588 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.01 10:13:38 BoogieIcfgContainer [2022-01-30 22:13:38,588 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-30 22:13:38,590 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-30 22:13:38,590 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-30 22:13:38,595 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-30 22:13:38,595 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 30.01 10:13:38" (1/3) ... [2022-01-30 22:13:38,596 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5d52e085 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.01 10:13:38, skipping insertion in model container [2022-01-30 22:13:38,596 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.01 10:13:38" (2/3) ... [2022-01-30 22:13:38,596 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5d52e085 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.01 10:13:38, skipping insertion in model container [2022-01-30 22:13:38,596 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.01 10:13:38" (3/3) ... [2022-01-30 22:13:38,597 INFO L111 eAbstractionObserver]: Analyzing ICFG sep60-2.i [2022-01-30 22:13:38,601 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-01-30 22:13:38,602 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-30 22:13:38,641 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-30 22:13:38,647 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2022-01-30 22:13:38,647 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-01-30 22:13:38,660 INFO L276 IsEmpty]: Start isEmpty. Operand has 32 states, 22 states have (on average 1.4090909090909092) internal successors, (31), 23 states have internal predecessors, (31), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-01-30 22:13:38,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-01-30 22:13:38,664 INFO L506 BasicCegarLoop]: Found error trace [2022-01-30 22:13:38,665 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-30 22:13:38,665 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-30 22:13:38,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-30 22:13:38,670 INFO L85 PathProgramCache]: Analyzing trace with hash 1340267542, now seen corresponding path program 1 times [2022-01-30 22:13:38,677 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-30 22:13:38,677 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [908415644] [2022-01-30 22:13:38,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-30 22:13:38,678 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-30 22:13:38,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:13:38,829 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-30 22:13:38,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:13:38,848 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-01-30 22:13:38,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:13:38,859 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-01-30 22:13:38,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:13:38,868 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-01-30 22:13:38,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:13:38,880 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-01-30 22:13:38,881 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-30 22:13:38,881 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [908415644] [2022-01-30 22:13:38,882 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [908415644] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-30 22:13:38,882 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-30 22:13:38,883 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-30 22:13:38,885 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [14289850] [2022-01-30 22:13:38,885 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-30 22:13:38,889 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-30 22:13:38,889 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-30 22:13:38,911 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-30 22:13:38,912 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-30 22:13:38,914 INFO L87 Difference]: Start difference. First operand has 32 states, 22 states have (on average 1.4090909090909092) internal successors, (31), 23 states have internal predecessors, (31), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Second operand has 3 states, 3 states have (on average 5.0) internal successors, (15), 2 states have internal predecessors, (15), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-01-30 22:13:38,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-30 22:13:38,952 INFO L93 Difference]: Finished difference Result 56 states and 75 transitions. [2022-01-30 22:13:38,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-30 22:13:38,955 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 2 states have internal predecessors, (15), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 32 [2022-01-30 22:13:38,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-30 22:13:38,960 INFO L225 Difference]: With dead ends: 56 [2022-01-30 22:13:38,961 INFO L226 Difference]: Without dead ends: 27 [2022-01-30 22:13:38,963 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-30 22:13:38,966 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 24 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-30 22:13:38,967 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [27 Valid, 37 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-30 22:13:38,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2022-01-30 22:13:38,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2022-01-30 22:13:38,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 19 states have (on average 1.2105263157894737) internal successors, (23), 19 states have internal predecessors, (23), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-01-30 22:13:38,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 32 transitions. [2022-01-30 22:13:38,999 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 32 transitions. Word has length 32 [2022-01-30 22:13:38,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-30 22:13:39,000 INFO L470 AbstractCegarLoop]: Abstraction has 27 states and 32 transitions. [2022-01-30 22:13:39,000 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 2 states have internal predecessors, (15), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-01-30 22:13:39,000 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 32 transitions. [2022-01-30 22:13:39,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-01-30 22:13:39,002 INFO L506 BasicCegarLoop]: Found error trace [2022-01-30 22:13:39,002 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-30 22:13:39,002 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-01-30 22:13:39,003 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-30 22:13:39,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-30 22:13:39,003 INFO L85 PathProgramCache]: Analyzing trace with hash -1608249685, now seen corresponding path program 1 times [2022-01-30 22:13:39,003 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-30 22:13:39,004 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [793313767] [2022-01-30 22:13:39,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-30 22:13:39,004 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-30 22:13:39,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:13:39,058 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-30 22:13:39,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:13:39,080 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-01-30 22:13:39,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:13:39,100 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-01-30 22:13:39,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:13:39,124 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-01-30 22:13:39,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:13:39,136 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-01-30 22:13:39,137 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-30 22:13:39,137 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [793313767] [2022-01-30 22:13:39,137 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [793313767] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-30 22:13:39,138 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1071827418] [2022-01-30 22:13:39,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-30 22:13:39,138 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-30 22:13:39,138 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-30 22:13:39,140 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) [2022-01-30 22:13:39,141 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-01-30 22:13:39,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:13:39,219 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-30 22:13:39,224 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-30 22:13:39,292 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-01-30 22:13:39,292 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-30 22:13:39,292 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1071827418] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-30 22:13:39,293 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-01-30 22:13:39,293 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2022-01-30 22:13:39,294 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [540160814] [2022-01-30 22:13:39,294 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-30 22:13:39,295 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-30 22:13:39,295 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-30 22:13:39,295 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-30 22:13:39,296 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-01-30 22:13:39,296 INFO L87 Difference]: Start difference. First operand 27 states and 32 transitions. Second operand has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-01-30 22:13:39,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-30 22:13:39,307 INFO L93 Difference]: Finished difference Result 48 states and 58 transitions. [2022-01-30 22:13:39,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-30 22:13:39,307 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 32 [2022-01-30 22:13:39,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-30 22:13:39,308 INFO L225 Difference]: With dead ends: 48 [2022-01-30 22:13:39,308 INFO L226 Difference]: Without dead ends: 29 [2022-01-30 22:13:39,309 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-01-30 22:13:39,310 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 1 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-30 22:13:39,311 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 58 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-30 22:13:39,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2022-01-30 22:13:39,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 28. [2022-01-30 22:13:39,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 20 states have (on average 1.2) internal successors, (24), 20 states have internal predecessors, (24), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-01-30 22:13:39,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 33 transitions. [2022-01-30 22:13:39,317 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 33 transitions. Word has length 32 [2022-01-30 22:13:39,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-30 22:13:39,318 INFO L470 AbstractCegarLoop]: Abstraction has 28 states and 33 transitions. [2022-01-30 22:13:39,318 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-01-30 22:13:39,318 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 33 transitions. [2022-01-30 22:13:39,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-01-30 22:13:39,319 INFO L506 BasicCegarLoop]: Found error trace [2022-01-30 22:13:39,319 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-30 22:13:39,354 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-01-30 22:13:39,543 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-30 22:13:39,543 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-30 22:13:39,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-30 22:13:39,544 INFO L85 PathProgramCache]: Analyzing trace with hash -1378666163, now seen corresponding path program 1 times [2022-01-30 22:13:39,544 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-30 22:13:39,545 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [885829981] [2022-01-30 22:13:39,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-30 22:13:39,545 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-30 22:13:39,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:13:39,604 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-30 22:13:39,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:13:39,610 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-01-30 22:13:39,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:13:39,618 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-01-30 22:13:39,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:13:39,644 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-01-30 22:13:39,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:13:39,657 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-01-30 22:13:39,658 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-30 22:13:39,658 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [885829981] [2022-01-30 22:13:39,658 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [885829981] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-30 22:13:39,658 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1338675359] [2022-01-30 22:13:39,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-30 22:13:39,658 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-30 22:13:39,659 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-30 22:13:39,660 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) [2022-01-30 22:13:39,686 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-01-30 22:13:39,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:13:39,734 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-30 22:13:39,736 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-30 22:13:39,788 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-01-30 22:13:39,788 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-30 22:13:39,788 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1338675359] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-30 22:13:39,788 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-01-30 22:13:39,789 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 6 [2022-01-30 22:13:39,789 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1934352645] [2022-01-30 22:13:39,789 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-30 22:13:39,789 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-30 22:13:39,789 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-30 22:13:39,790 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-30 22:13:39,790 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-01-30 22:13:39,790 INFO L87 Difference]: Start difference. First operand 28 states and 33 transitions. Second operand has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-01-30 22:13:39,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-30 22:13:39,805 INFO L93 Difference]: Finished difference Result 49 states and 62 transitions. [2022-01-30 22:13:39,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-30 22:13:39,808 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 34 [2022-01-30 22:13:39,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-30 22:13:39,809 INFO L225 Difference]: With dead ends: 49 [2022-01-30 22:13:39,809 INFO L226 Difference]: Without dead ends: 31 [2022-01-30 22:13:39,809 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-01-30 22:13:39,810 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 3 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-30 22:13:39,811 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 58 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-30 22:13:39,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2022-01-30 22:13:39,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 29. [2022-01-30 22:13:39,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 21 states have (on average 1.1904761904761905) internal successors, (25), 21 states have internal predecessors, (25), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-01-30 22:13:39,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 34 transitions. [2022-01-30 22:13:39,816 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 34 transitions. Word has length 34 [2022-01-30 22:13:39,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-30 22:13:39,817 INFO L470 AbstractCegarLoop]: Abstraction has 29 states and 34 transitions. [2022-01-30 22:13:39,817 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-01-30 22:13:39,817 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 34 transitions. [2022-01-30 22:13:39,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-01-30 22:13:39,818 INFO L506 BasicCegarLoop]: Found error trace [2022-01-30 22:13:39,818 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-30 22:13:39,842 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-01-30 22:13:40,018 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2022-01-30 22:13:40,019 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-30 22:13:40,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-30 22:13:40,020 INFO L85 PathProgramCache]: Analyzing trace with hash -1532493389, now seen corresponding path program 1 times [2022-01-30 22:13:40,020 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-30 22:13:40,020 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1091778788] [2022-01-30 22:13:40,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-30 22:13:40,020 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-30 22:13:40,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:13:40,060 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-30 22:13:40,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:13:40,066 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-01-30 22:13:40,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:13:40,082 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-01-30 22:13:40,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:13:40,097 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-01-30 22:13:40,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:13:40,124 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-01-30 22:13:40,124 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-30 22:13:40,124 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1091778788] [2022-01-30 22:13:40,124 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1091778788] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-30 22:13:40,125 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [106462324] [2022-01-30 22:13:40,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-30 22:13:40,125 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-30 22:13:40,125 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-30 22:13:40,126 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) [2022-01-30 22:13:40,127 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-01-30 22:13:40,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:13:40,203 INFO L263 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-30 22:13:40,206 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-30 22:13:40,282 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-01-30 22:13:40,282 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-30 22:13:40,285 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [106462324] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-30 22:13:40,285 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-01-30 22:13:40,289 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2022-01-30 22:13:40,290 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1171595858] [2022-01-30 22:13:40,290 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-30 22:13:40,290 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-30 22:13:40,291 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-30 22:13:40,292 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-30 22:13:40,292 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-01-30 22:13:40,292 INFO L87 Difference]: Start difference. First operand 29 states and 34 transitions. Second operand has 3 states, 3 states have (on average 9.0) internal successors, (27), 3 states have internal predecessors, (27), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-01-30 22:13:40,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-30 22:13:40,306 INFO L93 Difference]: Finished difference Result 45 states and 52 transitions. [2022-01-30 22:13:40,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-30 22:13:40,307 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 9.0) internal successors, (27), 3 states have internal predecessors, (27), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 43 [2022-01-30 22:13:40,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-30 22:13:40,308 INFO L225 Difference]: With dead ends: 45 [2022-01-30 22:13:40,308 INFO L226 Difference]: Without dead ends: 31 [2022-01-30 22:13:40,308 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-01-30 22:13:40,309 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 1 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-30 22:13:40,310 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 58 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-30 22:13:40,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2022-01-30 22:13:40,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 30. [2022-01-30 22:13:40,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 22 states have (on average 1.1818181818181819) internal successors, (26), 22 states have internal predecessors, (26), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-01-30 22:13:40,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 35 transitions. [2022-01-30 22:13:40,315 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 35 transitions. Word has length 43 [2022-01-30 22:13:40,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-30 22:13:40,316 INFO L470 AbstractCegarLoop]: Abstraction has 30 states and 35 transitions. [2022-01-30 22:13:40,316 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.0) internal successors, (27), 3 states have internal predecessors, (27), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-01-30 22:13:40,316 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 35 transitions. [2022-01-30 22:13:40,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-01-30 22:13:40,317 INFO L506 BasicCegarLoop]: Found error trace [2022-01-30 22:13:40,318 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-30 22:13:40,345 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-01-30 22:13:40,545 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-30 22:13:40,545 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-30 22:13:40,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-30 22:13:40,546 INFO L85 PathProgramCache]: Analyzing trace with hash 2018137525, now seen corresponding path program 1 times [2022-01-30 22:13:40,546 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-30 22:13:40,546 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [547442912] [2022-01-30 22:13:40,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-30 22:13:40,547 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-30 22:13:40,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:13:40,588 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-30 22:13:40,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:13:40,593 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-01-30 22:13:40,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:13:40,602 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-01-30 22:13:40,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:13:40,610 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-01-30 22:13:40,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:13:40,617 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2022-01-30 22:13:40,617 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-30 22:13:40,617 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [547442912] [2022-01-30 22:13:40,617 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [547442912] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-30 22:13:40,618 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [832676530] [2022-01-30 22:13:40,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-30 22:13:40,618 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-30 22:13:40,618 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-30 22:13:40,619 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) [2022-01-30 22:13:40,641 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-01-30 22:13:40,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:13:40,692 INFO L263 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 3 conjunts are in the unsatisfiable core [2022-01-30 22:13:40,696 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-30 22:13:40,805 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2022-01-30 22:13:40,805 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-30 22:13:40,907 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2022-01-30 22:13:40,908 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [832676530] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-30 22:13:40,908 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-30 22:13:40,908 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 8 [2022-01-30 22:13:40,910 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1824867997] [2022-01-30 22:13:40,910 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-30 22:13:40,911 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-01-30 22:13:40,911 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-30 22:13:40,911 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-01-30 22:13:40,912 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2022-01-30 22:13:40,912 INFO L87 Difference]: Start difference. First operand 30 states and 35 transitions. Second operand has 8 states, 8 states have (on average 4.625) internal successors, (37), 7 states have internal predecessors, (37), 2 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-01-30 22:13:41,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-30 22:13:41,046 INFO L93 Difference]: Finished difference Result 57 states and 69 transitions. [2022-01-30 22:13:41,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-30 22:13:41,046 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.625) internal successors, (37), 7 states have internal predecessors, (37), 2 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 45 [2022-01-30 22:13:41,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-30 22:13:41,048 INFO L225 Difference]: With dead ends: 57 [2022-01-30 22:13:41,048 INFO L226 Difference]: Without dead ends: 36 [2022-01-30 22:13:41,050 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=52, Invalid=80, Unknown=0, NotChecked=0, Total=132 [2022-01-30 22:13:41,053 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 28 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 109 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 121 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 109 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-30 22:13:41,059 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 49 Invalid, 121 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 109 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-30 22:13:41,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2022-01-30 22:13:41,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2022-01-30 22:13:41,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 28 states have (on average 1.1428571428571428) internal successors, (32), 28 states have internal predecessors, (32), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-01-30 22:13:41,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 41 transitions. [2022-01-30 22:13:41,071 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 41 transitions. Word has length 45 [2022-01-30 22:13:41,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-30 22:13:41,071 INFO L470 AbstractCegarLoop]: Abstraction has 36 states and 41 transitions. [2022-01-30 22:13:41,071 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.625) internal successors, (37), 7 states have internal predecessors, (37), 2 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-01-30 22:13:41,072 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 41 transitions. [2022-01-30 22:13:41,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-01-30 22:13:41,073 INFO L506 BasicCegarLoop]: Found error trace [2022-01-30 22:13:41,073 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-30 22:13:41,099 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-01-30 22:13:41,292 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-30 22:13:41,293 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-30 22:13:41,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-30 22:13:41,293 INFO L85 PathProgramCache]: Analyzing trace with hash -718656241, now seen corresponding path program 2 times [2022-01-30 22:13:41,293 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-30 22:13:41,294 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1432696050] [2022-01-30 22:13:41,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-30 22:13:41,294 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-30 22:13:41,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:13:41,336 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-30 22:13:41,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:13:41,342 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-01-30 22:13:41,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:13:41,358 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-01-30 22:13:41,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:13:41,365 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-01-30 22:13:41,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:13:41,373 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2022-01-30 22:13:41,373 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-30 22:13:41,373 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1432696050] [2022-01-30 22:13:41,373 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1432696050] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-30 22:13:41,373 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [64855109] [2022-01-30 22:13:41,373 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-30 22:13:41,374 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-30 22:13:41,374 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-30 22:13:41,375 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) [2022-01-30 22:13:41,407 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-01-30 22:13:41,463 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-30 22:13:41,463 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-30 22:13:41,464 INFO L263 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 6 conjunts are in the unsatisfiable core [2022-01-30 22:13:41,466 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-30 22:13:41,560 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2022-01-30 22:13:41,560 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-30 22:13:41,719 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2022-01-30 22:13:41,720 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [64855109] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-30 22:13:41,720 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-30 22:13:41,720 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7, 7] total 15 [2022-01-30 22:13:41,720 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [256283331] [2022-01-30 22:13:41,720 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-30 22:13:41,721 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-01-30 22:13:41,721 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-30 22:13:41,721 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-01-30 22:13:41,721 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=137, Unknown=0, NotChecked=0, Total=210 [2022-01-30 22:13:41,722 INFO L87 Difference]: Start difference. First operand 36 states and 41 transitions. Second operand has 15 states, 15 states have (on average 3.6666666666666665) internal successors, (55), 14 states have internal predecessors, (55), 2 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-01-30 22:13:41,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-30 22:13:41,958 INFO L93 Difference]: Finished difference Result 74 states and 95 transitions. [2022-01-30 22:13:41,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-01-30 22:13:41,959 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.6666666666666665) internal successors, (55), 14 states have internal predecessors, (55), 2 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 51 [2022-01-30 22:13:41,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-30 22:13:41,959 INFO L225 Difference]: With dead ends: 74 [2022-01-30 22:13:41,960 INFO L226 Difference]: Without dead ends: 53 [2022-01-30 22:13:41,960 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=213, Invalid=489, Unknown=0, NotChecked=0, Total=702 [2022-01-30 22:13:41,961 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 52 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 151 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 176 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 151 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-30 22:13:41,961 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [55 Valid, 52 Invalid, 176 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 151 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-30 22:13:41,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2022-01-30 22:13:41,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 51. [2022-01-30 22:13:41,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 43 states have (on average 1.1162790697674418) internal successors, (48), 43 states have internal predecessors, (48), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-01-30 22:13:41,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 57 transitions. [2022-01-30 22:13:41,968 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 57 transitions. Word has length 51 [2022-01-30 22:13:41,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-30 22:13:41,968 INFO L470 AbstractCegarLoop]: Abstraction has 51 states and 57 transitions. [2022-01-30 22:13:41,968 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.6666666666666665) internal successors, (55), 14 states have internal predecessors, (55), 2 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-01-30 22:13:41,968 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 57 transitions. [2022-01-30 22:13:41,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-01-30 22:13:41,970 INFO L506 BasicCegarLoop]: Found error trace [2022-01-30 22:13:41,970 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 6, 6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-30 22:13:41,995 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-01-30 22:13:42,191 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-30 22:13:42,192 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-30 22:13:42,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-30 22:13:42,192 INFO L85 PathProgramCache]: Analyzing trace with hash 637917693, now seen corresponding path program 3 times [2022-01-30 22:13:42,192 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-30 22:13:42,192 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1138637740] [2022-01-30 22:13:42,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-30 22:13:42,193 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-30 22:13:42,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:13:42,250 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-30 22:13:42,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:13:42,256 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-01-30 22:13:42,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:13:42,262 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2022-01-30 22:13:42,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:13:42,268 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2022-01-30 22:13:42,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:13:42,276 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 178 trivial. 0 not checked. [2022-01-30 22:13:42,276 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-30 22:13:42,276 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1138637740] [2022-01-30 22:13:42,276 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1138637740] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-30 22:13:42,277 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1568945771] [2022-01-30 22:13:42,277 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-30 22:13:42,277 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-30 22:13:42,277 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-30 22:13:42,278 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) [2022-01-30 22:13:42,286 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-01-30 22:13:42,349 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-30 22:13:42,349 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-30 22:13:42,350 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 3 conjunts are in the unsatisfiable core [2022-01-30 22:13:42,352 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-30 22:13:42,440 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 42 proven. 1 refuted. 0 times theorem prover too weak. 136 trivial. 0 not checked. [2022-01-30 22:13:42,440 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-30 22:13:42,524 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 178 trivial. 0 not checked. [2022-01-30 22:13:42,525 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1568945771] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-30 22:13:42,525 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-30 22:13:42,525 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 8 [2022-01-30 22:13:42,526 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1067256689] [2022-01-30 22:13:42,526 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-30 22:13:42,526 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-01-30 22:13:42,526 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-30 22:13:42,526 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-01-30 22:13:42,527 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2022-01-30 22:13:42,527 INFO L87 Difference]: Start difference. First operand 51 states and 57 transitions. Second operand has 8 states, 8 states have (on average 4.625) internal successors, (37), 7 states have internal predecessors, (37), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-30 22:13:42,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-30 22:13:42,617 INFO L93 Difference]: Finished difference Result 74 states and 85 transitions. [2022-01-30 22:13:42,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-30 22:13:42,617 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.625) internal successors, (37), 7 states have internal predecessors, (37), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 72 [2022-01-30 22:13:42,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-30 22:13:42,621 INFO L225 Difference]: With dead ends: 74 [2022-01-30 22:13:42,622 INFO L226 Difference]: Without dead ends: 57 [2022-01-30 22:13:42,622 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 149 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=52, Invalid=80, Unknown=0, NotChecked=0, Total=132 [2022-01-30 22:13:42,623 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 28 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 97 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 85 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-30 22:13:42,624 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 44 Invalid, 97 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 85 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-30 22:13:42,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2022-01-30 22:13:42,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2022-01-30 22:13:42,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 49 states have (on average 1.1020408163265305) internal successors, (54), 49 states have internal predecessors, (54), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-01-30 22:13:42,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 63 transitions. [2022-01-30 22:13:42,632 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 63 transitions. Word has length 72 [2022-01-30 22:13:42,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-30 22:13:42,632 INFO L470 AbstractCegarLoop]: Abstraction has 57 states and 63 transitions. [2022-01-30 22:13:42,632 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.625) internal successors, (37), 7 states have internal predecessors, (37), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-30 22:13:42,633 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 63 transitions. [2022-01-30 22:13:42,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2022-01-30 22:13:42,634 INFO L506 BasicCegarLoop]: Found error trace [2022-01-30 22:13:42,634 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 6, 6, 6, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-30 22:13:42,662 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-01-30 22:13:42,861 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-30 22:13:42,862 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-30 22:13:42,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-30 22:13:42,862 INFO L85 PathProgramCache]: Analyzing trace with hash -80307273, now seen corresponding path program 4 times [2022-01-30 22:13:42,863 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-30 22:13:42,863 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1789819472] [2022-01-30 22:13:42,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-30 22:13:42,863 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-30 22:13:42,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:13:42,983 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-30 22:13:42,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:13:42,986 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-01-30 22:13:42,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:13:42,993 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2022-01-30 22:13:42,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:13:42,999 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2022-01-30 22:13:43,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:13:43,006 INFO L134 CoverageAnalysis]: Checked inductivity of 194 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 94 trivial. 0 not checked. [2022-01-30 22:13:43,007 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-30 22:13:43,007 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1789819472] [2022-01-30 22:13:43,007 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1789819472] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-30 22:13:43,007 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [640359537] [2022-01-30 22:13:43,007 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-30 22:13:43,007 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-30 22:13:43,007 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-30 22:13:43,008 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) [2022-01-30 22:13:43,015 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-01-30 22:13:43,115 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-30 22:13:43,115 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-30 22:13:43,117 INFO L263 TraceCheckSpWp]: Trace formula consists of 317 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-30 22:13:43,122 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-30 22:13:43,235 INFO L134 CoverageAnalysis]: Checked inductivity of 194 backedges. 40 proven. 5 refuted. 0 times theorem prover too weak. 149 trivial. 0 not checked. [2022-01-30 22:13:43,235 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-30 22:13:43,371 INFO L134 CoverageAnalysis]: Checked inductivity of 194 backedges. 40 proven. 5 refuted. 0 times theorem prover too weak. 149 trivial. 0 not checked. [2022-01-30 22:13:43,371 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [640359537] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-30 22:13:43,371 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-30 22:13:43,371 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 5, 5] total 20 [2022-01-30 22:13:43,372 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2032263245] [2022-01-30 22:13:43,372 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-30 22:13:43,372 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-30 22:13:43,372 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-30 22:13:43,373 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-30 22:13:43,373 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=273, Unknown=0, NotChecked=0, Total=380 [2022-01-30 22:13:43,373 INFO L87 Difference]: Start difference. First operand 57 states and 63 transitions. Second operand has 20 states, 20 states have (on average 3.45) internal successors, (69), 19 states have internal predecessors, (69), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-01-30 22:13:43,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-30 22:13:43,693 INFO L93 Difference]: Finished difference Result 102 states and 125 transitions. [2022-01-30 22:13:43,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-01-30 22:13:43,694 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.45) internal successors, (69), 19 states have internal predecessors, (69), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 78 [2022-01-30 22:13:43,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-30 22:13:43,695 INFO L225 Difference]: With dead ends: 102 [2022-01-30 22:13:43,695 INFO L226 Difference]: Without dead ends: 72 [2022-01-30 22:13:43,696 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 199 GetRequests, 164 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 229 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=315, Invalid=1017, Unknown=0, NotChecked=0, Total=1332 [2022-01-30 22:13:43,696 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 89 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 169 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 200 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 169 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-30 22:13:43,697 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [92 Valid, 52 Invalid, 200 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 169 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-30 22:13:43,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2022-01-30 22:13:43,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 71. [2022-01-30 22:13:43,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 63 states have (on average 1.1428571428571428) internal successors, (72), 63 states have internal predecessors, (72), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-01-30 22:13:43,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 81 transitions. [2022-01-30 22:13:43,703 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 81 transitions. Word has length 78 [2022-01-30 22:13:43,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-30 22:13:43,704 INFO L470 AbstractCegarLoop]: Abstraction has 71 states and 81 transitions. [2022-01-30 22:13:43,704 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.45) internal successors, (69), 19 states have internal predecessors, (69), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-01-30 22:13:43,704 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 81 transitions. [2022-01-30 22:13:43,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2022-01-30 22:13:43,705 INFO L506 BasicCegarLoop]: Found error trace [2022-01-30 22:13:43,705 INFO L514 BasicCegarLoop]: trace histogram [18, 18, 18, 11, 11, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-30 22:13:43,731 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-01-30 22:13:43,927 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-30 22:13:43,928 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-30 22:13:43,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-30 22:13:43,928 INFO L85 PathProgramCache]: Analyzing trace with hash 514205785, now seen corresponding path program 5 times [2022-01-30 22:13:43,928 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-30 22:13:43,928 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [327591774] [2022-01-30 22:13:43,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-30 22:13:43,929 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-30 22:13:43,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:13:44,093 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-30 22:13:44,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:13:44,100 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-01-30 22:13:44,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:13:44,126 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2022-01-30 22:13:44,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:13:44,144 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2022-01-30 22:13:44,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:13:44,158 INFO L134 CoverageAnalysis]: Checked inductivity of 665 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 544 trivial. 0 not checked. [2022-01-30 22:13:44,158 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-30 22:13:44,159 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [327591774] [2022-01-30 22:13:44,159 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [327591774] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-30 22:13:44,159 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1658066347] [2022-01-30 22:13:44,159 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-30 22:13:44,159 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-30 22:13:44,159 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-30 22:13:44,160 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) [2022-01-30 22:13:44,187 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-01-30 22:13:44,786 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2022-01-30 22:13:44,786 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-30 22:13:44,789 INFO L263 TraceCheckSpWp]: Trace formula consists of 356 conjuncts, 8 conjunts are in the unsatisfiable core [2022-01-30 22:13:44,792 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-30 22:13:44,991 INFO L134 CoverageAnalysis]: Checked inductivity of 665 backedges. 244 proven. 51 refuted. 0 times theorem prover too weak. 370 trivial. 0 not checked. [2022-01-30 22:13:44,992 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-30 22:13:45,260 INFO L134 CoverageAnalysis]: Checked inductivity of 665 backedges. 0 proven. 299 refuted. 0 times theorem prover too weak. 366 trivial. 0 not checked. [2022-01-30 22:13:45,261 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1658066347] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-30 22:13:45,261 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-30 22:13:45,261 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 9, 9] total 29 [2022-01-30 22:13:45,263 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1173094987] [2022-01-30 22:13:45,263 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-30 22:13:45,264 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-01-30 22:13:45,264 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-30 22:13:45,265 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-01-30 22:13:45,265 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=600, Unknown=0, NotChecked=0, Total=812 [2022-01-30 22:13:45,266 INFO L87 Difference]: Start difference. First operand 71 states and 81 transitions. Second operand has 29 states, 29 states have (on average 3.2413793103448274) internal successors, (94), 28 states have internal predecessors, (94), 2 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-01-30 22:13:45,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-30 22:13:45,819 INFO L93 Difference]: Finished difference Result 140 states and 179 transitions. [2022-01-30 22:13:45,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-01-30 22:13:45,823 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 3.2413793103448274) internal successors, (94), 28 states have internal predecessors, (94), 2 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 116 [2022-01-30 22:13:45,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-30 22:13:45,824 INFO L225 Difference]: With dead ends: 140 [2022-01-30 22:13:45,824 INFO L226 Difference]: Without dead ends: 98 [2022-01-30 22:13:45,826 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 293 GetRequests, 240 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 577 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=630, Invalid=2340, Unknown=0, NotChecked=0, Total=2970 [2022-01-30 22:13:45,827 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 143 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 267 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 146 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 310 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 267 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-30 22:13:45,827 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [146 Valid, 67 Invalid, 310 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 267 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-30 22:13:45,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2022-01-30 22:13:45,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 97. [2022-01-30 22:13:45,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 89 states have (on average 1.1910112359550562) internal successors, (106), 89 states have internal predecessors, (106), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-01-30 22:13:45,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 115 transitions. [2022-01-30 22:13:45,837 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 115 transitions. Word has length 116 [2022-01-30 22:13:45,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-30 22:13:45,837 INFO L470 AbstractCegarLoop]: Abstraction has 97 states and 115 transitions. [2022-01-30 22:13:45,837 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 3.2413793103448274) internal successors, (94), 28 states have internal predecessors, (94), 2 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-01-30 22:13:45,837 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 115 transitions. [2022-01-30 22:13:45,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2022-01-30 22:13:45,839 INFO L506 BasicCegarLoop]: Found error trace [2022-01-30 22:13:45,839 INFO L514 BasicCegarLoop]: trace histogram [42, 42, 42, 12, 12, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-30 22:13:45,859 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-01-30 22:13:46,040 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2022-01-30 22:13:46,040 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-30 22:13:46,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-30 22:13:46,041 INFO L85 PathProgramCache]: Analyzing trace with hash 679667451, now seen corresponding path program 6 times [2022-01-30 22:13:46,041 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-30 22:13:46,041 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1003257180] [2022-01-30 22:13:46,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-30 22:13:46,041 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-30 22:13:46,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:13:46,232 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-30 22:13:46,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:13:46,235 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-01-30 22:13:46,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:13:46,265 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2022-01-30 22:13:46,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:13:46,291 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 139 [2022-01-30 22:13:46,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:13:46,311 INFO L134 CoverageAnalysis]: Checked inductivity of 2884 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 2740 trivial. 0 not checked. [2022-01-30 22:13:46,311 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-30 22:13:46,312 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1003257180] [2022-01-30 22:13:46,312 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1003257180] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-30 22:13:46,312 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1465421241] [2022-01-30 22:13:46,312 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-30 22:13:46,312 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-30 22:13:46,312 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-30 22:13:46,331 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) [2022-01-30 22:13:46,339 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-01-30 22:13:46,582 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2022-01-30 22:13:46,582 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-30 22:13:46,584 INFO L263 TraceCheckSpWp]: Trace formula consists of 312 conjuncts, 6 conjunts are in the unsatisfiable core [2022-01-30 22:13:46,588 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-30 22:13:46,915 INFO L134 CoverageAnalysis]: Checked inductivity of 2884 backedges. 1242 proven. 16 refuted. 0 times theorem prover too weak. 1626 trivial. 0 not checked. [2022-01-30 22:13:46,916 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-30 22:13:47,199 INFO L134 CoverageAnalysis]: Checked inductivity of 2884 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 2868 trivial. 0 not checked. [2022-01-30 22:13:47,200 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1465421241] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-30 22:13:47,200 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-30 22:13:47,200 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 7, 7] total 26 [2022-01-30 22:13:47,200 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1772550740] [2022-01-30 22:13:47,200 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-30 22:13:47,201 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-30 22:13:47,201 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-30 22:13:47,201 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-30 22:13:47,202 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=172, Invalid=478, Unknown=0, NotChecked=0, Total=650 [2022-01-30 22:13:47,202 INFO L87 Difference]: Start difference. First operand 97 states and 115 transitions. Second operand has 26 states, 26 states have (on average 2.9615384615384617) internal successors, (77), 25 states have internal predecessors, (77), 2 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-01-30 22:13:47,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-30 22:13:47,624 INFO L93 Difference]: Finished difference Result 178 states and 220 transitions. [2022-01-30 22:13:47,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-01-30 22:13:47,625 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.9615384615384617) internal successors, (77), 25 states have internal predecessors, (77), 2 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 190 [2022-01-30 22:13:47,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-30 22:13:47,626 INFO L225 Difference]: With dead ends: 178 [2022-01-30 22:13:47,626 INFO L226 Difference]: Without dead ends: 112 [2022-01-30 22:13:47,627 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 425 GetRequests, 378 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 443 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=510, Invalid=1842, Unknown=0, NotChecked=0, Total=2352 [2022-01-30 22:13:47,628 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 66 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 245 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 283 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 245 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-30 22:13:47,628 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [69 Valid, 67 Invalid, 283 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 245 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-30 22:13:47,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2022-01-30 22:13:47,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 111. [2022-01-30 22:13:47,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 103 states have (on average 1.1650485436893203) internal successors, (120), 103 states have internal predecessors, (120), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-01-30 22:13:47,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 129 transitions. [2022-01-30 22:13:47,637 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 129 transitions. Word has length 190 [2022-01-30 22:13:47,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-30 22:13:47,637 INFO L470 AbstractCegarLoop]: Abstraction has 111 states and 129 transitions. [2022-01-30 22:13:47,637 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.9615384615384617) internal successors, (77), 25 states have internal predecessors, (77), 2 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-01-30 22:13:47,637 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 129 transitions. [2022-01-30 22:13:47,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 205 [2022-01-30 22:13:47,639 INFO L506 BasicCegarLoop]: Found error trace [2022-01-30 22:13:47,639 INFO L514 BasicCegarLoop]: trace histogram [42, 42, 42, 13, 13, 10, 10, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-30 22:13:47,665 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-01-30 22:13:47,863 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-01-30 22:13:47,864 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-30 22:13:47,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-30 22:13:47,864 INFO L85 PathProgramCache]: Analyzing trace with hash 1674387473, now seen corresponding path program 7 times [2022-01-30 22:13:47,864 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-30 22:13:47,864 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1710957383] [2022-01-30 22:13:47,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-30 22:13:47,865 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-30 22:13:47,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:13:48,052 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-30 22:13:48,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:13:48,057 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-01-30 22:13:48,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:13:48,078 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2022-01-30 22:13:48,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:13:48,095 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 153 [2022-01-30 22:13:48,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:13:48,112 INFO L134 CoverageAnalysis]: Checked inductivity of 2993 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 2824 trivial. 0 not checked. [2022-01-30 22:13:48,112 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-30 22:13:48,112 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1710957383] [2022-01-30 22:13:48,113 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1710957383] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-30 22:13:48,113 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [66472759] [2022-01-30 22:13:48,113 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-30 22:13:48,113 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-30 22:13:48,113 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-30 22:13:48,116 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) [2022-01-30 22:13:48,143 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-01-30 22:13:48,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:13:48,288 INFO L263 TraceCheckSpWp]: Trace formula consists of 710 conjuncts, 15 conjunts are in the unsatisfiable core [2022-01-30 22:13:48,291 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-30 22:13:48,522 INFO L134 CoverageAnalysis]: Checked inductivity of 2993 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 2824 trivial. 0 not checked. [2022-01-30 22:13:48,522 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-30 22:13:48,985 INFO L134 CoverageAnalysis]: Checked inductivity of 2993 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 2824 trivial. 0 not checked. [2022-01-30 22:13:48,986 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [66472759] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-30 22:13:48,986 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-30 22:13:48,986 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 32 [2022-01-30 22:13:48,986 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1611472416] [2022-01-30 22:13:48,986 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-30 22:13:48,987 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-01-30 22:13:48,987 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-30 22:13:48,987 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-01-30 22:13:48,988 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=467, Invalid=525, Unknown=0, NotChecked=0, Total=992 [2022-01-30 22:13:48,988 INFO L87 Difference]: Start difference. First operand 111 states and 129 transitions. Second operand has 32 states, 32 states have (on average 2.65625) internal successors, (85), 31 states have internal predecessors, (85), 2 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-01-30 22:13:49,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-30 22:13:49,465 INFO L93 Difference]: Finished difference Result 219 states and 269 transitions. [2022-01-30 22:13:49,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-01-30 22:13:49,465 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.65625) internal successors, (85), 31 states have internal predecessors, (85), 2 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 204 [2022-01-30 22:13:49,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-30 22:13:49,466 INFO L225 Difference]: With dead ends: 219 [2022-01-30 22:13:49,466 INFO L226 Difference]: Without dead ends: 141 [2022-01-30 22:13:49,468 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 459 GetRequests, 401 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 547 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1336, Invalid=2204, Unknown=0, NotChecked=0, Total=3540 [2022-01-30 22:13:49,469 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 90 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 111 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 162 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 111 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-30 22:13:49,469 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [93 Valid, 39 Invalid, 162 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 111 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-30 22:13:49,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2022-01-30 22:13:49,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 141. [2022-01-30 22:13:49,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 133 states have (on average 1.1278195488721805) internal successors, (150), 133 states have internal predecessors, (150), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-01-30 22:13:49,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 159 transitions. [2022-01-30 22:13:49,477 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 159 transitions. Word has length 204 [2022-01-30 22:13:49,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-30 22:13:49,477 INFO L470 AbstractCegarLoop]: Abstraction has 141 states and 159 transitions. [2022-01-30 22:13:49,477 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.65625) internal successors, (85), 31 states have internal predecessors, (85), 2 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-01-30 22:13:49,477 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 159 transitions. [2022-01-30 22:13:49,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 235 [2022-01-30 22:13:49,479 INFO L506 BasicCegarLoop]: Found error trace [2022-01-30 22:13:49,480 INFO L514 BasicCegarLoop]: trace histogram [42, 42, 42, 28, 28, 10, 10, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-30 22:13:49,504 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-01-30 22:13:49,695 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-01-30 22:13:49,696 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-30 22:13:49,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-30 22:13:49,696 INFO L85 PathProgramCache]: Analyzing trace with hash 1784301071, now seen corresponding path program 8 times [2022-01-30 22:13:49,696 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-30 22:13:49,696 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1099247151] [2022-01-30 22:13:49,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-30 22:13:49,696 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-30 22:13:49,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:13:50,185 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-30 22:13:50,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:13:50,188 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2022-01-30 22:13:50,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:13:50,204 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 112 [2022-01-30 22:13:50,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:13:50,219 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 183 [2022-01-30 22:13:50,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:13:50,236 INFO L134 CoverageAnalysis]: Checked inductivity of 3608 backedges. 0 proven. 784 refuted. 0 times theorem prover too weak. 2824 trivial. 0 not checked. [2022-01-30 22:13:50,236 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-30 22:13:50,236 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1099247151] [2022-01-30 22:13:50,236 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1099247151] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-30 22:13:50,236 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2138310154] [2022-01-30 22:13:50,236 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-30 22:13:50,236 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-30 22:13:50,237 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-30 22:13:50,238 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) [2022-01-30 22:13:50,239 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-01-30 22:13:50,431 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-30 22:13:50,431 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-30 22:13:50,435 INFO L263 TraceCheckSpWp]: Trace formula consists of 845 conjuncts, 30 conjunts are in the unsatisfiable core [2022-01-30 22:13:50,439 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-30 22:13:50,784 INFO L134 CoverageAnalysis]: Checked inductivity of 3608 backedges. 0 proven. 784 refuted. 0 times theorem prover too weak. 2824 trivial. 0 not checked. [2022-01-30 22:13:50,784 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-30 22:13:52,003 INFO L134 CoverageAnalysis]: Checked inductivity of 3608 backedges. 0 proven. 784 refuted. 0 times theorem prover too weak. 2824 trivial. 0 not checked. [2022-01-30 22:13:52,004 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2138310154] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-30 22:13:52,004 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-30 22:13:52,004 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 31, 31] total 62 [2022-01-30 22:13:52,004 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1189983588] [2022-01-30 22:13:52,004 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-30 22:13:52,005 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 62 states [2022-01-30 22:13:52,005 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-30 22:13:52,006 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2022-01-30 22:13:52,007 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1832, Invalid=1950, Unknown=0, NotChecked=0, Total=3782 [2022-01-30 22:13:52,007 INFO L87 Difference]: Start difference. First operand 141 states and 159 transitions. Second operand has 62 states, 62 states have (on average 2.338709677419355) internal successors, (145), 61 states have internal predecessors, (145), 2 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-01-30 22:13:53,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-30 22:13:53,451 INFO L93 Difference]: Finished difference Result 279 states and 344 transitions. [2022-01-30 22:13:53,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2022-01-30 22:13:53,455 INFO L78 Accepts]: Start accepts. Automaton has has 62 states, 62 states have (on average 2.338709677419355) internal successors, (145), 61 states have internal predecessors, (145), 2 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 234 [2022-01-30 22:13:53,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-30 22:13:53,456 INFO L225 Difference]: With dead ends: 279 [2022-01-30 22:13:53,457 INFO L226 Difference]: Without dead ends: 201 [2022-01-30 22:13:53,459 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 564 GetRequests, 446 SyntacticMatches, 0 SemanticMatches, 118 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2227 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=5371, Invalid=8909, Unknown=0, NotChecked=0, Total=14280 [2022-01-30 22:13:53,460 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 136 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 195 mSolverCounterSat, 98 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 139 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 293 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 98 IncrementalHoareTripleChecker+Valid, 195 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-30 22:13:53,460 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [139 Valid, 44 Invalid, 293 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [98 Valid, 195 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-30 22:13:53,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2022-01-30 22:13:53,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 201. [2022-01-30 22:13:53,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 201 states, 193 states have (on average 1.0880829015544042) internal successors, (210), 193 states have internal predecessors, (210), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-01-30 22:13:53,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 219 transitions. [2022-01-30 22:13:53,469 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 219 transitions. Word has length 234 [2022-01-30 22:13:53,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-30 22:13:53,469 INFO L470 AbstractCegarLoop]: Abstraction has 201 states and 219 transitions. [2022-01-30 22:13:53,469 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 62 states, 62 states have (on average 2.338709677419355) internal successors, (145), 61 states have internal predecessors, (145), 2 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-01-30 22:13:53,470 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 219 transitions. [2022-01-30 22:13:53,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 295 [2022-01-30 22:13:53,472 INFO L506 BasicCegarLoop]: Found error trace [2022-01-30 22:13:53,472 INFO L514 BasicCegarLoop]: trace histogram [58, 58, 42, 42, 42, 10, 10, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-30 22:13:53,499 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-01-30 22:13:53,687 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-01-30 22:13:53,687 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-30 22:13:53,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-30 22:13:53,688 INFO L85 PathProgramCache]: Analyzing trace with hash 235159691, now seen corresponding path program 9 times [2022-01-30 22:13:53,688 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-30 22:13:53,688 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [699757220] [2022-01-30 22:13:53,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-30 22:13:53,688 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-30 22:13:53,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:13:55,121 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-30 22:13:55,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:13:55,128 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 123 [2022-01-30 22:13:55,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:13:55,144 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 172 [2022-01-30 22:13:55,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:13:55,159 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 243 [2022-01-30 22:13:55,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:13:55,179 INFO L134 CoverageAnalysis]: Checked inductivity of 6188 backedges. 0 proven. 3364 refuted. 0 times theorem prover too weak. 2824 trivial. 0 not checked. [2022-01-30 22:13:55,179 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-30 22:13:55,179 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [699757220] [2022-01-30 22:13:55,179 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [699757220] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-30 22:13:55,179 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [287570557] [2022-01-30 22:13:55,179 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-30 22:13:55,179 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-30 22:13:55,180 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-30 22:13:55,184 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) [2022-01-30 22:13:55,193 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-01-30 22:13:55,779 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2022-01-30 22:13:55,780 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-30 22:13:55,783 INFO L263 TraceCheckSpWp]: Trace formula consists of 471 conjuncts, 12 conjunts are in the unsatisfiable core [2022-01-30 22:13:55,786 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-30 22:13:56,391 INFO L134 CoverageAnalysis]: Checked inductivity of 6188 backedges. 1242 proven. 100 refuted. 0 times theorem prover too weak. 4846 trivial. 0 not checked. [2022-01-30 22:13:56,392 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-30 22:13:56,988 INFO L134 CoverageAnalysis]: Checked inductivity of 6188 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 6088 trivial. 0 not checked. [2022-01-30 22:13:56,988 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [287570557] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-30 22:13:56,988 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-30 22:13:56,988 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [62, 13, 13] total 84 [2022-01-30 22:13:56,988 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [117647465] [2022-01-30 22:13:56,989 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-30 22:13:56,989 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 84 states [2022-01-30 22:13:56,989 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-30 22:13:56,990 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2022-01-30 22:13:56,992 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2107, Invalid=4865, Unknown=0, NotChecked=0, Total=6972 [2022-01-30 22:13:56,992 INFO L87 Difference]: Start difference. First operand 201 states and 219 transitions. Second operand has 84 states, 84 states have (on average 2.2976190476190474) internal successors, (193), 83 states have internal predecessors, (193), 2 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-01-30 22:13:59,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-30 22:13:59,445 INFO L93 Difference]: Finished difference Result 306 states and 354 transitions. [2022-01-30 22:13:59,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2022-01-30 22:13:59,446 INFO L78 Accepts]: Start accepts. Automaton has has 84 states, 84 states have (on average 2.2976190476190474) internal successors, (193), 83 states have internal predecessors, (193), 2 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 294 [2022-01-30 22:13:59,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-30 22:13:59,448 INFO L225 Difference]: With dead ends: 306 [2022-01-30 22:13:59,449 INFO L226 Difference]: Without dead ends: 228 [2022-01-30 22:13:59,455 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 737 GetRequests, 574 SyntacticMatches, 0 SemanticMatches, 163 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5209 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=6315, Invalid=20745, Unknown=0, NotChecked=0, Total=27060 [2022-01-30 22:13:59,456 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 182 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 337 mSolverCounterSat, 105 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 185 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 442 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 105 IncrementalHoareTripleChecker+Valid, 337 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-30 22:13:59,456 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [185 Valid, 62 Invalid, 442 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [105 Valid, 337 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-30 22:13:59,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228 states. [2022-01-30 22:13:59,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228 to 227. [2022-01-30 22:13:59,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 227 states, 219 states have (on average 1.0776255707762556) internal successors, (236), 219 states have internal predecessors, (236), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-01-30 22:13:59,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 245 transitions. [2022-01-30 22:13:59,469 INFO L78 Accepts]: Start accepts. Automaton has 227 states and 245 transitions. Word has length 294 [2022-01-30 22:13:59,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-30 22:13:59,470 INFO L470 AbstractCegarLoop]: Abstraction has 227 states and 245 transitions. [2022-01-30 22:13:59,471 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 84 states, 84 states have (on average 2.2976190476190474) internal successors, (193), 83 states have internal predecessors, (193), 2 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-01-30 22:13:59,471 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states and 245 transitions. [2022-01-30 22:13:59,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 321 [2022-01-30 22:13:59,474 INFO L506 BasicCegarLoop]: Found error trace [2022-01-30 22:13:59,474 INFO L514 BasicCegarLoop]: trace histogram [59, 59, 42, 42, 42, 22, 22, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-30 22:13:59,503 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-01-30 22:13:59,700 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-01-30 22:13:59,701 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-30 22:13:59,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-30 22:13:59,701 INFO L85 PathProgramCache]: Analyzing trace with hash -1342564459, now seen corresponding path program 10 times [2022-01-30 22:13:59,701 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-30 22:13:59,701 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1995473766] [2022-01-30 22:13:59,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-30 22:13:59,701 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-30 22:13:59,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:14:01,020 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-30 22:14:01,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:14:01,023 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 125 [2022-01-30 22:14:01,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:14:01,036 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 174 [2022-01-30 22:14:01,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:14:01,049 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 269 [2022-01-30 22:14:01,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:14:01,065 INFO L134 CoverageAnalysis]: Checked inductivity of 6689 backedges. 0 proven. 3481 refuted. 0 times theorem prover too weak. 3208 trivial. 0 not checked. [2022-01-30 22:14:01,065 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-30 22:14:01,065 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1995473766] [2022-01-30 22:14:01,066 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1995473766] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-30 22:14:01,066 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1513426053] [2022-01-30 22:14:01,066 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-30 22:14:01,066 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-30 22:14:01,066 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-30 22:14:01,068 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) [2022-01-30 22:14:01,079 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-01-30 22:14:01,371 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-30 22:14:01,371 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-30 22:14:01,376 INFO L263 TraceCheckSpWp]: Trace formula consists of 1208 conjuncts, 16 conjunts are in the unsatisfiable core [2022-01-30 22:14:01,380 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-30 22:14:02,081 INFO L134 CoverageAnalysis]: Checked inductivity of 6689 backedges. 1240 proven. 287 refuted. 0 times theorem prover too weak. 5162 trivial. 0 not checked. [2022-01-30 22:14:02,081 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-30 22:14:02,891 INFO L134 CoverageAnalysis]: Checked inductivity of 6689 backedges. 1240 proven. 287 refuted. 0 times theorem prover too weak. 5162 trivial. 0 not checked. [2022-01-30 22:14:02,891 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1513426053] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-30 22:14:02,891 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-30 22:14:02,892 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [63, 17, 17] total 93 [2022-01-30 22:14:02,892 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [283531300] [2022-01-30 22:14:02,892 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-30 22:14:02,893 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 93 states [2022-01-30 22:14:02,893 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-30 22:14:02,894 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 93 interpolants. [2022-01-30 22:14:02,895 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2388, Invalid=6168, Unknown=0, NotChecked=0, Total=8556 [2022-01-30 22:14:02,895 INFO L87 Difference]: Start difference. First operand 227 states and 245 transitions. Second operand has 93 states, 93 states have (on average 2.5698924731182795) internal successors, (239), 92 states have internal predecessors, (239), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-01-30 22:14:05,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-30 22:14:05,850 INFO L93 Difference]: Finished difference Result 379 states and 450 transitions. [2022-01-30 22:14:05,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2022-01-30 22:14:05,851 INFO L78 Accepts]: Start accepts. Automaton has has 93 states, 93 states have (on average 2.5698924731182795) internal successors, (239), 92 states have internal predecessors, (239), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 320 [2022-01-30 22:14:05,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-30 22:14:05,852 INFO L225 Difference]: With dead ends: 379 [2022-01-30 22:14:05,852 INFO L226 Difference]: Without dead ends: 277 [2022-01-30 22:14:05,855 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 829 GetRequests, 648 SyntacticMatches, 0 SemanticMatches, 181 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6765 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=7158, Invalid=26148, Unknown=0, NotChecked=0, Total=33306 [2022-01-30 22:14:05,856 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 375 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 472 mSolverCounterSat, 117 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 378 SdHoareTripleChecker+Valid, 77 SdHoareTripleChecker+Invalid, 589 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 117 IncrementalHoareTripleChecker+Valid, 472 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-30 22:14:05,856 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [378 Valid, 77 Invalid, 589 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [117 Valid, 472 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-30 22:14:05,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 277 states. [2022-01-30 22:14:05,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 277 to 277. [2022-01-30 22:14:05,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 277 states, 269 states have (on average 1.1226765799256506) internal successors, (302), 269 states have internal predecessors, (302), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-01-30 22:14:05,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 277 states to 277 states and 311 transitions. [2022-01-30 22:14:05,865 INFO L78 Accepts]: Start accepts. Automaton has 277 states and 311 transitions. Word has length 320 [2022-01-30 22:14:05,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-30 22:14:05,865 INFO L470 AbstractCegarLoop]: Abstraction has 277 states and 311 transitions. [2022-01-30 22:14:05,866 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 93 states, 93 states have (on average 2.5698924731182795) internal successors, (239), 92 states have internal predecessors, (239), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-01-30 22:14:05,866 INFO L276 IsEmpty]: Start isEmpty. Operand 277 states and 311 transitions. [2022-01-30 22:14:05,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 467 [2022-01-30 22:14:05,868 INFO L506 BasicCegarLoop]: Found error trace [2022-01-30 22:14:05,869 INFO L514 BasicCegarLoop]: trace histogram [90, 90, 90, 60, 60, 22, 22, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-30 22:14:05,890 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-01-30 22:14:06,079 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-01-30 22:14:06,080 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-30 22:14:06,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-30 22:14:06,080 INFO L85 PathProgramCache]: Analyzing trace with hash 2068653111, now seen corresponding path program 11 times [2022-01-30 22:14:06,080 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-30 22:14:06,080 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [789657116] [2022-01-30 22:14:06,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-30 22:14:06,080 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-30 22:14:06,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:14:06,334 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-30 22:14:06,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:14:06,339 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 127 [2022-01-30 22:14:06,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:14:06,744 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 224 [2022-01-30 22:14:06,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:14:06,770 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 367 [2022-01-30 22:14:06,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:14:06,799 INFO L134 CoverageAnalysis]: Checked inductivity of 16384 backedges. 0 proven. 6863 refuted. 0 times theorem prover too weak. 9521 trivial. 0 not checked. [2022-01-30 22:14:06,799 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-30 22:14:06,799 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [789657116] [2022-01-30 22:14:06,799 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [789657116] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-30 22:14:06,799 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2067474359] [2022-01-30 22:14:06,799 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-30 22:14:06,799 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-30 22:14:06,799 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-30 22:14:06,804 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) [2022-01-30 22:14:06,813 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process