/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/loop-invgen/half_2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-b030c9e [2022-03-19 22:29:33,077 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-19 22:29:33,079 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-19 22:29:33,133 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-03-19 22:29:33,188 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2022-03-19 22:29:33,226 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-19 22:29:33,227 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-19 22:29:33,227 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-03-19 22:29:33,227 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-03-19 22:29:33,227 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-03-19 22:29:33,227 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-03-19 22:29:33,228 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-03-19 22:29:33,228 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-03-19 22:29:33,228 INFO L138 SettingsManager]: * Use SBE=true [2022-03-19 22:29:33,228 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-19 22:29:33,229 INFO L138 SettingsManager]: * sizeof long=4 [2022-03-19 22:29:33,229 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-19 22:29:33,229 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-03-19 22:29:33,229 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-19 22:29:33,229 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-19 22:29:33,229 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-19 22:29:33,229 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-19 22:29:33,230 INFO L138 SettingsManager]: * sizeof long double=12 [2022-03-19 22:29:33,230 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-19 22:29:33,230 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-19 22:29:33,230 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-19 22:29:33,230 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-19 22:29:33,230 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-19 22:29:33,230 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-19 22:29:33,231 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-19 22:29:33,231 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-19 22:29:33,231 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-03-19 22:29:33,231 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-03-19 22:29:33,231 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-03-19 22:29:33,231 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-03-19 22:29:33,231 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-03-19 22:29:33,231 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-03-19 22:29:33,231 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-03-19 22:29:33,232 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-03-19 22:29:33,416 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-19 22:29:33,428 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-19 22:29:33,430 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-19 22:29:33,431 INFO L271 PluginConnector]: Initializing CDTParser... [2022-03-19 22:29:33,431 INFO L275 PluginConnector]: CDTParser initialized [2022-03-19 22:29:33,432 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-invgen/half_2.i [2022-03-19 22:29:33,472 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ecaa429ac/d697de041962419f9cc18c9c207e8e38/FLAG052998e6d [2022-03-19 22:29:33,832 INFO L306 CDTParser]: Found 1 translation units. [2022-03-19 22:29:33,832 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-invgen/half_2.i [2022-03-19 22:29:33,836 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ecaa429ac/d697de041962419f9cc18c9c207e8e38/FLAG052998e6d [2022-03-19 22:29:33,844 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ecaa429ac/d697de041962419f9cc18c9c207e8e38 [2022-03-19 22:29:33,846 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-19 22:29:33,846 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-03-19 22:29:33,848 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-03-19 22:29:33,848 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-03-19 22:29:33,850 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-03-19 22:29:33,850 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.03 10:29:33" (1/1) ... [2022-03-19 22:29:33,851 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5bfde560 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 10:29:33, skipping insertion in model container [2022-03-19 22:29:33,851 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.03 10:29:33" (1/1) ... [2022-03-19 22:29:33,856 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-03-19 22:29:33,873 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-03-19 22:29:34,019 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loop-invgen/half_2.i[893,906] [2022-03-19 22:29:34,032 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-19 22:29:34,037 INFO L203 MainTranslator]: Completed pre-run [2022-03-19 22:29:34,047 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loop-invgen/half_2.i[893,906] [2022-03-19 22:29:34,052 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-19 22:29:34,062 INFO L208 MainTranslator]: Completed translation [2022-03-19 22:29:34,062 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 10:29:34 WrapperNode [2022-03-19 22:29:34,062 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-03-19 22:29:34,063 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-19 22:29:34,063 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-19 22:29:34,063 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-19 22:29:34,069 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 10:29:34" (1/1) ... [2022-03-19 22:29:34,069 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 10:29:34" (1/1) ... [2022-03-19 22:29:34,074 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 10:29:34" (1/1) ... [2022-03-19 22:29:34,074 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 10:29:34" (1/1) ... [2022-03-19 22:29:34,085 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 10:29:34" (1/1) ... [2022-03-19 22:29:34,089 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 10:29:34" (1/1) ... [2022-03-19 22:29:34,093 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 10:29:34" (1/1) ... [2022-03-19 22:29:34,095 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-19 22:29:34,096 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-19 22:29:34,096 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-19 22:29:34,096 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-19 22:29:34,097 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 10:29:34" (1/1) ... [2022-03-19 22:29:34,101 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-19 22:29:34,108 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 22:29:34,128 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-03-19 22:29:34,148 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-03-19 22:29:34,174 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-03-19 22:29:34,175 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-19 22:29:34,175 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-03-19 22:29:34,175 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-03-19 22:29:34,176 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-03-19 22:29:34,176 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-03-19 22:29:34,176 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-03-19 22:29:34,176 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-03-19 22:29:34,176 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2022-03-19 22:29:34,176 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2022-03-19 22:29:34,176 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-03-19 22:29:34,176 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-03-19 22:29:34,177 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-03-19 22:29:34,177 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-03-19 22:29:34,177 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-03-19 22:29:34,177 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-03-19 22:29:34,177 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-03-19 22:29:34,177 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-03-19 22:29:34,177 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-19 22:29:34,177 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-03-19 22:29:34,177 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-03-19 22:29:34,177 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-03-19 22:29:34,238 INFO L234 CfgBuilder]: Building ICFG [2022-03-19 22:29:34,240 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-19 22:29:34,363 INFO L275 CfgBuilder]: Performing block encoding [2022-03-19 22:29:34,367 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-19 22:29:34,367 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-03-19 22:29:34,368 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.03 10:29:34 BoogieIcfgContainer [2022-03-19 22:29:34,368 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-19 22:29:34,369 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-19 22:29:34,369 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-19 22:29:34,372 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-19 22:29:34,372 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.03 10:29:33" (1/3) ... [2022-03-19 22:29:34,372 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@50c8067d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.03 10:29:34, skipping insertion in model container [2022-03-19 22:29:34,372 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 10:29:34" (2/3) ... [2022-03-19 22:29:34,373 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@50c8067d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.03 10:29:34, skipping insertion in model container [2022-03-19 22:29:34,373 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.03 10:29:34" (3/3) ... [2022-03-19 22:29:34,373 INFO L111 eAbstractionObserver]: Analyzing ICFG half_2.i [2022-03-19 22:29:34,377 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-03-19 22:29:34,377 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-19 22:29:34,406 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-19 22:29:34,410 INFO L340 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP [2022-03-19 22:29:34,410 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-03-19 22:29:34,428 INFO L276 IsEmpty]: Start isEmpty. Operand has 23 states, 15 states have (on average 1.4666666666666666) internal successors, (22), 16 states have internal predecessors, (22), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-19 22:29:34,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-03-19 22:29:34,431 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 22:29:34,431 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 22:29:34,432 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 22:29:34,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 22:29:34,435 INFO L85 PathProgramCache]: Analyzing trace with hash 21938802, now seen corresponding path program 1 times [2022-03-19 22:29:34,441 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 22:29:34,441 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1577826560] [2022-03-19 22:29:34,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 22:29:34,442 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 22:29:34,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:29:34,654 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 22:29:34,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:29:34,668 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 22:29:34,669 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 22:29:34,669 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1577826560] [2022-03-19 22:29:34,669 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1577826560] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 22:29:34,670 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 22:29:34,670 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-03-19 22:29:34,671 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2126660657] [2022-03-19 22:29:34,672 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 22:29:34,674 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-19 22:29:34,675 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 22:29:34,694 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-19 22:29:34,695 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2022-03-19 22:29:34,697 INFO L87 Difference]: Start difference. First operand has 23 states, 15 states have (on average 1.4666666666666666) internal successors, (22), 16 states have internal predecessors, (22), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 8 states, 7 states have (on average 1.4285714285714286) internal successors, (10), 6 states have internal predecessors, (10), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 22:29:34,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 22:29:34,873 INFO L93 Difference]: Finished difference Result 50 states and 64 transitions. [2022-03-19 22:29:34,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-19 22:29:34,875 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 1.4285714285714286) internal successors, (10), 6 states have internal predecessors, (10), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 14 [2022-03-19 22:29:34,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 22:29:34,879 INFO L225 Difference]: With dead ends: 50 [2022-03-19 22:29:34,879 INFO L226 Difference]: Without dead ends: 27 [2022-03-19 22:29:34,881 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2022-03-19 22:29:34,884 INFO L913 BasicCegarLoop]: 19 mSDtfsCounter, 35 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 114 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 123 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 114 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 22:29:34,885 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 52 Invalid, 123 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 114 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 22:29:34,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2022-03-19 22:29:34,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 26. [2022-03-19 22:29:34,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 18 states have (on average 1.1666666666666667) internal successors, (21), 19 states have internal predecessors, (21), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-19 22:29:34,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 28 transitions. [2022-03-19 22:29:34,909 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 28 transitions. Word has length 14 [2022-03-19 22:29:34,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 22:29:34,910 INFO L478 AbstractCegarLoop]: Abstraction has 26 states and 28 transitions. [2022-03-19 22:29:34,910 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 1.4285714285714286) internal successors, (10), 6 states have internal predecessors, (10), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 22:29:34,910 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 28 transitions. [2022-03-19 22:29:34,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-03-19 22:29:34,911 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 22:29:34,911 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 22:29:34,911 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-19 22:29:34,911 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 22:29:34,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 22:29:34,912 INFO L85 PathProgramCache]: Analyzing trace with hash -1438800602, now seen corresponding path program 1 times [2022-03-19 22:29:34,912 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 22:29:34,912 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [425186563] [2022-03-19 22:29:34,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 22:29:34,912 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 22:29:34,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:29:35,005 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 22:29:35,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:29:35,011 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 22:29:35,011 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 22:29:35,012 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [425186563] [2022-03-19 22:29:35,012 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [425186563] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 22:29:35,012 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2026602746] [2022-03-19 22:29:35,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 22:29:35,012 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 22:29:35,012 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 22:29:35,014 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 22:29:35,019 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-03-19 22:29:35,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:29:35,052 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-19 22:29:35,056 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 22:29:35,184 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 22:29:35,215 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 22:29:35,427 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 22:29:35,427 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2026602746] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 22:29:35,427 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 22:29:35,428 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 16 [2022-03-19 22:29:35,428 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1182900806] [2022-03-19 22:29:35,429 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-19 22:29:35,429 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-19 22:29:35,429 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 22:29:35,430 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-19 22:29:35,430 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2022-03-19 22:29:35,430 INFO L87 Difference]: Start difference. First operand 26 states and 28 transitions. Second operand has 16 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 13 states have internal predecessors, (23), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 22:29:35,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 22:29:35,807 INFO L93 Difference]: Finished difference Result 52 states and 60 transitions. [2022-03-19 22:29:35,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-03-19 22:29:35,807 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 13 states have internal predecessors, (23), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 15 [2022-03-19 22:29:35,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 22:29:35,809 INFO L225 Difference]: With dead ends: 52 [2022-03-19 22:29:35,809 INFO L226 Difference]: Without dead ends: 50 [2022-03-19 22:29:35,810 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 21 SyntacticMatches, 4 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 221 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=199, Invalid=793, Unknown=0, NotChecked=0, Total=992 [2022-03-19 22:29:35,811 INFO L913 BasicCegarLoop]: 14 mSDtfsCounter, 60 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 165 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 211 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 165 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 22:29:35,811 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [61 Valid, 41 Invalid, 211 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 165 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 22:29:35,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2022-03-19 22:29:35,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 39. [2022-03-19 22:29:35,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 28 states have (on average 1.1785714285714286) internal successors, (33), 30 states have internal predecessors, (33), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (5), 3 states have call predecessors, (5), 5 states have call successors, (5) [2022-03-19 22:29:35,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 44 transitions. [2022-03-19 22:29:35,821 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 44 transitions. Word has length 15 [2022-03-19 22:29:35,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 22:29:35,821 INFO L478 AbstractCegarLoop]: Abstraction has 39 states and 44 transitions. [2022-03-19 22:29:35,821 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 13 states have internal predecessors, (23), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 22:29:35,821 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 44 transitions. [2022-03-19 22:29:35,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-19 22:29:35,822 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 22:29:35,822 INFO L499 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 22:29:35,844 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-03-19 22:29:36,040 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 22:29:36,041 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 22:29:36,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 22:29:36,042 INFO L85 PathProgramCache]: Analyzing trace with hash 1206656678, now seen corresponding path program 2 times [2022-03-19 22:29:36,042 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 22:29:36,043 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1572941020] [2022-03-19 22:29:36,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 22:29:36,043 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 22:29:36,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:29:36,143 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 22:29:36,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:29:36,157 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 22:29:36,157 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 22:29:36,157 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1572941020] [2022-03-19 22:29:36,157 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1572941020] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 22:29:36,157 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1921577512] [2022-03-19 22:29:36,157 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 22:29:36,158 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 22:29:36,158 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 22:29:36,176 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 22:29:36,177 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-03-19 22:29:36,208 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 22:29:36,208 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 22:29:36,208 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 11 conjunts are in the unsatisfiable core [2022-03-19 22:29:36,209 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 22:29:36,326 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 22:29:36,326 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 22:29:36,420 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 22:29:36,420 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1921577512] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 22:29:36,421 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 22:29:36,421 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 18 [2022-03-19 22:29:36,421 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1367848548] [2022-03-19 22:29:36,421 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-19 22:29:36,421 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-19 22:29:36,421 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 22:29:36,422 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-19 22:29:36,422 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2022-03-19 22:29:36,422 INFO L87 Difference]: Start difference. First operand 39 states and 44 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 15 states have internal predecessors, (27), 3 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 22:29:36,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 22:29:36,726 INFO L93 Difference]: Finished difference Result 68 states and 77 transitions. [2022-03-19 22:29:36,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-19 22:29:36,726 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 15 states have internal predecessors, (27), 3 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 17 [2022-03-19 22:29:36,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 22:29:36,729 INFO L225 Difference]: With dead ends: 68 [2022-03-19 22:29:36,729 INFO L226 Difference]: Without dead ends: 66 [2022-03-19 22:29:36,729 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 163 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=165, Invalid=705, Unknown=0, NotChecked=0, Total=870 [2022-03-19 22:29:36,730 INFO L913 BasicCegarLoop]: 21 mSDtfsCounter, 67 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 360 mSolverCounterSat, 75 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 435 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 75 IncrementalHoareTripleChecker+Valid, 360 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-19 22:29:36,730 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [68 Valid, 63 Invalid, 435 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [75 Valid, 360 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-19 22:29:36,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2022-03-19 22:29:36,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 37. [2022-03-19 22:29:36,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 26 states have (on average 1.1923076923076923) internal successors, (31), 28 states have internal predecessors, (31), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (5), 3 states have call predecessors, (5), 5 states have call successors, (5) [2022-03-19 22:29:36,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 42 transitions. [2022-03-19 22:29:36,739 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 42 transitions. Word has length 17 [2022-03-19 22:29:36,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 22:29:36,740 INFO L478 AbstractCegarLoop]: Abstraction has 37 states and 42 transitions. [2022-03-19 22:29:36,740 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 15 states have internal predecessors, (27), 3 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 22:29:36,740 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 42 transitions. [2022-03-19 22:29:36,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-03-19 22:29:36,740 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 22:29:36,740 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 22:29:36,765 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-03-19 22:29:36,941 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2022-03-19 22:29:36,941 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 22:29:36,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 22:29:36,942 INFO L85 PathProgramCache]: Analyzing trace with hash 1292947397, now seen corresponding path program 1 times [2022-03-19 22:29:36,942 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 22:29:36,942 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [896710978] [2022-03-19 22:29:36,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 22:29:36,942 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 22:29:36,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:29:37,064 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 22:29:37,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:29:37,087 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-03-19 22:29:37,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:29:37,108 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 22:29:37,108 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 22:29:37,108 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [896710978] [2022-03-19 22:29:37,108 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [896710978] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 22:29:37,108 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1554853000] [2022-03-19 22:29:37,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 22:29:37,109 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 22:29:37,109 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 22:29:37,112 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 22:29:37,116 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-03-19 22:29:37,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:29:37,145 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 8 conjunts are in the unsatisfiable core [2022-03-19 22:29:37,150 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 22:29:37,203 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 22:29:37,203 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-19 22:29:37,203 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1554853000] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 22:29:37,204 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-03-19 22:29:37,204 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [8] total 12 [2022-03-19 22:29:37,204 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [567992830] [2022-03-19 22:29:37,205 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 22:29:37,205 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-19 22:29:37,205 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 22:29:37,206 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-19 22:29:37,206 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2022-03-19 22:29:37,206 INFO L87 Difference]: Start difference. First operand 37 states and 42 transitions. Second operand has 6 states, 6 states have (on average 2.5) internal successors, (15), 6 states have internal predecessors, (15), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-19 22:29:37,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 22:29:37,244 INFO L93 Difference]: Finished difference Result 49 states and 55 transitions. [2022-03-19 22:29:37,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-19 22:29:37,244 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 6 states have internal predecessors, (15), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 21 [2022-03-19 22:29:37,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 22:29:37,246 INFO L225 Difference]: With dead ends: 49 [2022-03-19 22:29:37,246 INFO L226 Difference]: Without dead ends: 37 [2022-03-19 22:29:37,248 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=150, Unknown=0, NotChecked=0, Total=182 [2022-03-19 22:29:37,252 INFO L913 BasicCegarLoop]: 13 mSDtfsCounter, 7 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-19 22:29:37,257 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 54 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-19 22:29:37,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2022-03-19 22:29:37,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2022-03-19 22:29:37,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 26 states have (on average 1.1538461538461537) internal successors, (30), 28 states have internal predecessors, (30), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (5), 3 states have call predecessors, (5), 5 states have call successors, (5) [2022-03-19 22:29:37,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 41 transitions. [2022-03-19 22:29:37,265 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 41 transitions. Word has length 21 [2022-03-19 22:29:37,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 22:29:37,265 INFO L478 AbstractCegarLoop]: Abstraction has 37 states and 41 transitions. [2022-03-19 22:29:37,265 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 6 states have internal predecessors, (15), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-19 22:29:37,265 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 41 transitions. [2022-03-19 22:29:37,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-19 22:29:37,266 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 22:29:37,266 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 22:29:37,287 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-03-19 22:29:37,484 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 22:29:37,484 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 22:29:37,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 22:29:37,485 INFO L85 PathProgramCache]: Analyzing trace with hash -1252120251, now seen corresponding path program 1 times [2022-03-19 22:29:37,485 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 22:29:37,485 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [394739347] [2022-03-19 22:29:37,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 22:29:37,485 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 22:29:37,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:29:37,641 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 22:29:37,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:29:37,646 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-19 22:29:37,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:29:37,652 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 22:29:37,652 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 22:29:37,652 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [394739347] [2022-03-19 22:29:37,652 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [394739347] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 22:29:37,652 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1670844950] [2022-03-19 22:29:37,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 22:29:37,652 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 22:29:37,652 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 22:29:37,672 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 22:29:37,673 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-03-19 22:29:37,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:29:37,699 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2022-03-19 22:29:37,701 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 22:29:37,820 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 22:29:37,820 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 22:29:38,038 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 22:29:38,038 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1670844950] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 22:29:38,038 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 22:29:38,039 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 10] total 22 [2022-03-19 22:29:38,039 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1574725736] [2022-03-19 22:29:38,039 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-19 22:29:38,039 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-19 22:29:38,039 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 22:29:38,039 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-19 22:29:38,040 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=386, Unknown=0, NotChecked=0, Total=462 [2022-03-19 22:29:38,040 INFO L87 Difference]: Start difference. First operand 37 states and 41 transitions. Second operand has 22 states, 21 states have (on average 1.619047619047619) internal successors, (34), 19 states have internal predecessors, (34), 5 states have call successors, (8), 4 states have call predecessors, (8), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-03-19 22:29:38,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 22:29:38,634 INFO L93 Difference]: Finished difference Result 70 states and 80 transitions. [2022-03-19 22:29:38,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-03-19 22:29:38,635 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 1.619047619047619) internal successors, (34), 19 states have internal predecessors, (34), 5 states have call successors, (8), 4 states have call predecessors, (8), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 23 [2022-03-19 22:29:38,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 22:29:38,636 INFO L225 Difference]: With dead ends: 70 [2022-03-19 22:29:38,636 INFO L226 Difference]: Without dead ends: 43 [2022-03-19 22:29:38,637 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 37 SyntacticMatches, 4 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 442 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=303, Invalid=1589, Unknown=0, NotChecked=0, Total=1892 [2022-03-19 22:29:38,637 INFO L913 BasicCegarLoop]: 15 mSDtfsCounter, 71 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 439 mSolverCounterSat, 73 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 87 SdHoareTripleChecker+Invalid, 512 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 73 IncrementalHoareTripleChecker+Valid, 439 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-19 22:29:38,637 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [72 Valid, 87 Invalid, 512 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [73 Valid, 439 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-19 22:29:38,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2022-03-19 22:29:38,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 42. [2022-03-19 22:29:38,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 30 states have (on average 1.1333333333333333) internal successors, (34), 32 states have internal predecessors, (34), 7 states have call successors, (7), 5 states have call predecessors, (7), 4 states have return successors, (6), 4 states have call predecessors, (6), 6 states have call successors, (6) [2022-03-19 22:29:38,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 47 transitions. [2022-03-19 22:29:38,644 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 47 transitions. Word has length 23 [2022-03-19 22:29:38,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 22:29:38,644 INFO L478 AbstractCegarLoop]: Abstraction has 42 states and 47 transitions. [2022-03-19 22:29:38,644 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 1.619047619047619) internal successors, (34), 19 states have internal predecessors, (34), 5 states have call successors, (8), 4 states have call predecessors, (8), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-03-19 22:29:38,644 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 47 transitions. [2022-03-19 22:29:38,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-03-19 22:29:38,645 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 22:29:38,645 INFO L499 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 22:29:38,663 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-03-19 22:29:38,845 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 22:29:38,846 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 22:29:38,846 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 22:29:38,846 INFO L85 PathProgramCache]: Analyzing trace with hash -889872314, now seen corresponding path program 2 times [2022-03-19 22:29:38,846 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 22:29:38,846 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1205046457] [2022-03-19 22:29:38,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 22:29:38,846 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 22:29:38,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:29:39,018 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 22:29:39,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:29:39,022 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-03-19 22:29:39,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:29:39,027 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-03-19 22:29:39,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:29:39,031 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 5 proven. 12 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-19 22:29:39,031 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 22:29:39,031 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1205046457] [2022-03-19 22:29:39,031 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1205046457] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 22:29:39,032 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2113277153] [2022-03-19 22:29:39,032 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 22:29:39,032 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 22:29:39,049 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 22:29:39,050 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 22:29:39,051 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-03-19 22:29:39,081 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 22:29:39,081 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 22:29:39,081 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 22 conjunts are in the unsatisfiable core [2022-03-19 22:29:39,083 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 22:29:39,289 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 4 proven. 13 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-19 22:29:39,290 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 22:29:39,609 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 4 proven. 13 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-19 22:29:39,610 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2113277153] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 22:29:39,610 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 22:29:39,610 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 30 [2022-03-19 22:29:39,610 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [711809120] [2022-03-19 22:29:39,610 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-19 22:29:39,610 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-03-19 22:29:39,610 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 22:29:39,611 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-03-19 22:29:39,611 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=743, Unknown=0, NotChecked=0, Total=870 [2022-03-19 22:29:39,611 INFO L87 Difference]: Start difference. First operand 42 states and 47 transitions. Second operand has 30 states, 29 states have (on average 1.5517241379310345) internal successors, (45), 27 states have internal predecessors, (45), 8 states have call successors, (11), 4 states have call predecessors, (11), 1 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-03-19 22:29:40,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 22:29:40,338 INFO L93 Difference]: Finished difference Result 81 states and 92 transitions. [2022-03-19 22:29:40,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-03-19 22:29:40,338 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 29 states have (on average 1.5517241379310345) internal successors, (45), 27 states have internal predecessors, (45), 8 states have call successors, (11), 4 states have call predecessors, (11), 1 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) Word has length 31 [2022-03-19 22:29:40,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 22:29:40,339 INFO L225 Difference]: With dead ends: 81 [2022-03-19 22:29:40,339 INFO L226 Difference]: Without dead ends: 62 [2022-03-19 22:29:40,340 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 50 SyntacticMatches, 3 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 735 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=401, Invalid=2461, Unknown=0, NotChecked=0, Total=2862 [2022-03-19 22:29:40,340 INFO L913 BasicCegarLoop]: 14 mSDtfsCounter, 89 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 433 mSolverCounterSat, 90 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 523 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 90 IncrementalHoareTripleChecker+Valid, 433 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-19 22:29:40,341 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [90 Valid, 81 Invalid, 523 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [90 Valid, 433 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-19 22:29:40,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2022-03-19 22:29:40,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 61. [2022-03-19 22:29:40,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 44 states have (on average 1.1136363636363635) internal successors, (49), 47 states have internal predecessors, (49), 10 states have call successors, (10), 7 states have call predecessors, (10), 6 states have return successors, (9), 6 states have call predecessors, (9), 9 states have call successors, (9) [2022-03-19 22:29:40,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 68 transitions. [2022-03-19 22:29:40,349 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 68 transitions. Word has length 31 [2022-03-19 22:29:40,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 22:29:40,349 INFO L478 AbstractCegarLoop]: Abstraction has 61 states and 68 transitions. [2022-03-19 22:29:40,349 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 29 states have (on average 1.5517241379310345) internal successors, (45), 27 states have internal predecessors, (45), 8 states have call successors, (11), 4 states have call predecessors, (11), 1 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-03-19 22:29:40,349 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 68 transitions. [2022-03-19 22:29:40,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-03-19 22:29:40,350 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 22:29:40,350 INFO L499 BasicCegarLoop]: trace histogram [7, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 22:29:40,367 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-03-19 22:29:40,567 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 22:29:40,567 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 22:29:40,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 22:29:40,567 INFO L85 PathProgramCache]: Analyzing trace with hash 387199814, now seen corresponding path program 3 times [2022-03-19 22:29:40,568 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 22:29:40,568 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [466150720] [2022-03-19 22:29:40,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 22:29:40,568 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 22:29:40,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:29:40,693 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 22:29:40,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:29:40,698 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-03-19 22:29:40,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:29:40,704 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-03-19 22:29:40,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:29:40,707 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 19 proven. 20 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-19 22:29:40,707 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 22:29:40,708 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [466150720] [2022-03-19 22:29:40,708 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [466150720] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 22:29:40,708 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2010403613] [2022-03-19 22:29:40,708 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-19 22:29:40,708 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 22:29:40,708 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 22:29:40,722 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 22:29:40,723 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-03-19 22:29:40,764 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-03-19 22:29:40,764 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 22:29:40,766 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-19 22:29:40,767 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 22:29:40,890 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 4 proven. 35 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-19 22:29:40,890 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 22:29:41,056 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 4 proven. 35 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-19 22:29:41,056 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2010403613] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 22:29:41,056 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 22:29:41,056 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 14] total 34 [2022-03-19 22:29:41,057 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [964090679] [2022-03-19 22:29:41,057 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-19 22:29:41,057 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-03-19 22:29:41,057 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 22:29:41,057 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-03-19 22:29:41,058 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=211, Invalid=911, Unknown=0, NotChecked=0, Total=1122 [2022-03-19 22:29:41,058 INFO L87 Difference]: Start difference. First operand 61 states and 68 transitions. Second operand has 34 states, 34 states have (on average 1.4705882352941178) internal successors, (50), 31 states have internal predecessors, (50), 7 states have call successors, (10), 4 states have call predecessors, (10), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-03-19 22:29:41,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 22:29:41,486 INFO L93 Difference]: Finished difference Result 105 states and 123 transitions. [2022-03-19 22:29:41,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-03-19 22:29:41,486 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 1.4705882352941178) internal successors, (50), 31 states have internal predecessors, (50), 7 states have call successors, (10), 4 states have call predecessors, (10), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Word has length 35 [2022-03-19 22:29:41,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 22:29:41,487 INFO L225 Difference]: With dead ends: 105 [2022-03-19 22:29:41,487 INFO L226 Difference]: Without dead ends: 103 [2022-03-19 22:29:41,488 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 56 SyntacticMatches, 2 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 816 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=623, Invalid=2457, Unknown=0, NotChecked=0, Total=3080 [2022-03-19 22:29:41,489 INFO L913 BasicCegarLoop]: 18 mSDtfsCounter, 81 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 704 mSolverCounterSat, 134 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 105 SdHoareTripleChecker+Invalid, 838 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 134 IncrementalHoareTripleChecker+Valid, 704 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-19 22:29:41,489 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [82 Valid, 105 Invalid, 838 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [134 Valid, 704 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-19 22:29:41,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2022-03-19 22:29:41,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 89. [2022-03-19 22:29:41,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 63 states have (on average 1.0793650793650793) internal successors, (68), 67 states have internal predecessors, (68), 18 states have call successors, (18), 8 states have call predecessors, (18), 7 states have return successors, (17), 13 states have call predecessors, (17), 17 states have call successors, (17) [2022-03-19 22:29:41,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 103 transitions. [2022-03-19 22:29:41,503 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 103 transitions. Word has length 35 [2022-03-19 22:29:41,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 22:29:41,503 INFO L478 AbstractCegarLoop]: Abstraction has 89 states and 103 transitions. [2022-03-19 22:29:41,503 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 1.4705882352941178) internal successors, (50), 31 states have internal predecessors, (50), 7 states have call successors, (10), 4 states have call predecessors, (10), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-03-19 22:29:41,503 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 103 transitions. [2022-03-19 22:29:41,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-03-19 22:29:41,504 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 22:29:41,504 INFO L499 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 22:29:41,522 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-03-19 22:29:41,717 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 22:29:41,717 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 22:29:41,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 22:29:41,718 INFO L85 PathProgramCache]: Analyzing trace with hash -1145077211, now seen corresponding path program 4 times [2022-03-19 22:29:41,718 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 22:29:41,718 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [589284611] [2022-03-19 22:29:41,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 22:29:41,718 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 22:29:41,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:29:41,913 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 22:29:41,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:29:41,921 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-03-19 22:29:41,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:29:41,930 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-03-19 22:29:41,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:29:41,933 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2022-03-19 22:29:41,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:29:41,936 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 11 proven. 20 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-03-19 22:29:41,936 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 22:29:41,936 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [589284611] [2022-03-19 22:29:41,936 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [589284611] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 22:29:41,937 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [319154139] [2022-03-19 22:29:41,937 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 22:29:41,937 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 22:29:41,937 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 22:29:41,938 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 22:29:41,939 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-03-19 22:29:41,983 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 22:29:41,983 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 22:29:41,984 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-19 22:29:41,999 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 22:29:42,195 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 6 proven. 25 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-03-19 22:29:42,195 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 22:29:42,609 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 6 proven. 25 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-03-19 22:29:42,609 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [319154139] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 22:29:42,609 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 22:29:42,609 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14, 14] total 32 [2022-03-19 22:29:42,609 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1377404038] [2022-03-19 22:29:42,609 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-19 22:29:42,610 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-03-19 22:29:42,610 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 22:29:42,610 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-03-19 22:29:42,610 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=847, Unknown=0, NotChecked=0, Total=992 [2022-03-19 22:29:42,610 INFO L87 Difference]: Start difference. First operand 89 states and 103 transitions. Second operand has 32 states, 31 states have (on average 1.6129032258064515) internal successors, (50), 29 states have internal predecessors, (50), 11 states have call successors, (14), 4 states have call predecessors, (14), 1 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-03-19 22:29:43,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 22:29:43,495 INFO L93 Difference]: Finished difference Result 137 states and 157 transitions. [2022-03-19 22:29:43,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-03-19 22:29:43,495 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 31 states have (on average 1.6129032258064515) internal successors, (50), 29 states have internal predecessors, (50), 11 states have call successors, (14), 4 states have call predecessors, (14), 1 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) Word has length 39 [2022-03-19 22:29:43,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 22:29:43,496 INFO L225 Difference]: With dead ends: 137 [2022-03-19 22:29:43,496 INFO L226 Difference]: Without dead ends: 103 [2022-03-19 22:29:43,497 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 67 SyntacticMatches, 4 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 882 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=503, Invalid=3037, Unknown=0, NotChecked=0, Total=3540 [2022-03-19 22:29:43,497 INFO L913 BasicCegarLoop]: 15 mSDtfsCounter, 103 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 495 mSolverCounterSat, 110 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 104 SdHoareTripleChecker+Valid, 82 SdHoareTripleChecker+Invalid, 605 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 110 IncrementalHoareTripleChecker+Valid, 495 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-19 22:29:43,497 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [104 Valid, 82 Invalid, 605 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [110 Valid, 495 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-19 22:29:43,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2022-03-19 22:29:43,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 100. [2022-03-19 22:29:43,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 71 states have (on average 1.0845070422535212) internal successors, (77), 75 states have internal predecessors, (77), 21 states have call successors, (21), 8 states have call predecessors, (21), 7 states have return successors, (20), 16 states have call predecessors, (20), 20 states have call successors, (20) [2022-03-19 22:29:43,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 118 transitions. [2022-03-19 22:29:43,512 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 118 transitions. Word has length 39 [2022-03-19 22:29:43,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 22:29:43,513 INFO L478 AbstractCegarLoop]: Abstraction has 100 states and 118 transitions. [2022-03-19 22:29:43,513 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 31 states have (on average 1.6129032258064515) internal successors, (50), 29 states have internal predecessors, (50), 11 states have call successors, (14), 4 states have call predecessors, (14), 1 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-03-19 22:29:43,513 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 118 transitions. [2022-03-19 22:29:43,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-03-19 22:29:43,514 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 22:29:43,514 INFO L499 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 22:29:43,533 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-03-19 22:29:43,733 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 22:29:43,733 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 22:29:43,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 22:29:43,733 INFO L85 PathProgramCache]: Analyzing trace with hash -131816602, now seen corresponding path program 5 times [2022-03-19 22:29:43,733 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 22:29:43,733 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1051977472] [2022-03-19 22:29:43,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 22:29:43,734 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 22:29:43,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:29:43,970 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 22:29:43,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:29:43,995 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-03-19 22:29:43,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:29:43,999 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2022-03-19 22:29:44,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:29:44,002 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-03-19 22:29:44,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:29:44,005 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-03-19 22:29:44,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:29:44,008 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 20 proven. 29 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-03-19 22:29:44,008 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 22:29:44,008 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1051977472] [2022-03-19 22:29:44,008 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1051977472] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 22:29:44,008 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [397533624] [2022-03-19 22:29:44,008 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-19 22:29:44,008 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 22:29:44,008 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 22:29:44,009 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 22:29:44,014 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-03-19 22:29:44,046 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-03-19 22:29:44,047 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 22:29:44,047 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-19 22:29:44,048 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 22:29:44,241 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 8 proven. 41 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-03-19 22:29:44,241 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 22:29:44,666 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 8 proven. 41 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-03-19 22:29:44,667 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [397533624] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 22:29:44,667 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 22:29:44,667 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16, 16] total 37 [2022-03-19 22:29:44,667 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2144808289] [2022-03-19 22:29:44,667 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-19 22:29:44,667 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-03-19 22:29:44,667 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 22:29:44,668 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-03-19 22:29:44,668 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=1142, Unknown=0, NotChecked=0, Total=1332 [2022-03-19 22:29:44,668 INFO L87 Difference]: Start difference. First operand 100 states and 118 transitions. Second operand has 37 states, 36 states have (on average 1.6111111111111112) internal successors, (58), 34 states have internal predecessors, (58), 14 states have call successors, (17), 4 states have call predecessors, (17), 1 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2022-03-19 22:29:45,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 22:29:45,815 INFO L93 Difference]: Finished difference Result 151 states and 174 transitions. [2022-03-19 22:29:45,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-03-19 22:29:45,815 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 36 states have (on average 1.6111111111111112) internal successors, (58), 34 states have internal predecessors, (58), 14 states have call successors, (17), 4 states have call predecessors, (17), 1 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) Word has length 47 [2022-03-19 22:29:45,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 22:29:45,816 INFO L225 Difference]: With dead ends: 151 [2022-03-19 22:29:45,816 INFO L226 Difference]: Without dead ends: 114 [2022-03-19 22:29:45,818 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 82 SyntacticMatches, 4 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1166 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=651, Invalid=4041, Unknown=0, NotChecked=0, Total=4692 [2022-03-19 22:29:45,818 INFO L913 BasicCegarLoop]: 16 mSDtfsCounter, 123 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 701 mSolverCounterSat, 148 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 124 SdHoareTripleChecker+Valid, 93 SdHoareTripleChecker+Invalid, 849 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 148 IncrementalHoareTripleChecker+Valid, 701 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-19 22:29:45,818 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [124 Valid, 93 Invalid, 849 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [148 Valid, 701 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-19 22:29:45,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2022-03-19 22:29:45,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 112. [2022-03-19 22:29:45,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 80 states have (on average 1.0875) internal successors, (87), 84 states have internal predecessors, (87), 23 states have call successors, (23), 9 states have call predecessors, (23), 8 states have return successors, (22), 18 states have call predecessors, (22), 22 states have call successors, (22) [2022-03-19 22:29:45,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 132 transitions. [2022-03-19 22:29:45,833 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 132 transitions. Word has length 47 [2022-03-19 22:29:45,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 22:29:45,834 INFO L478 AbstractCegarLoop]: Abstraction has 112 states and 132 transitions. [2022-03-19 22:29:45,834 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 36 states have (on average 1.6111111111111112) internal successors, (58), 34 states have internal predecessors, (58), 14 states have call successors, (17), 4 states have call predecessors, (17), 1 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2022-03-19 22:29:45,834 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 132 transitions. [2022-03-19 22:29:45,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-03-19 22:29:45,835 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 22:29:45,835 INFO L499 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 22:29:45,867 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-03-19 22:29:46,035 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2022-03-19 22:29:46,036 INFO L403 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 22:29:46,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 22:29:46,036 INFO L85 PathProgramCache]: Analyzing trace with hash -536816891, now seen corresponding path program 6 times [2022-03-19 22:29:46,036 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 22:29:46,036 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [201147297] [2022-03-19 22:29:46,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 22:29:46,036 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 22:29:46,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:29:46,346 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 22:29:46,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:29:46,349 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-03-19 22:29:46,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:29:46,352 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-03-19 22:29:46,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:29:46,355 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2022-03-19 22:29:46,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:29:46,358 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2022-03-19 22:29:46,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:29:46,361 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2022-03-19 22:29:46,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:29:46,364 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 32 proven. 39 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-03-19 22:29:46,364 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 22:29:46,364 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [201147297] [2022-03-19 22:29:46,364 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [201147297] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 22:29:46,364 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [240489986] [2022-03-19 22:29:46,364 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-19 22:29:46,364 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 22:29:46,364 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 22:29:46,365 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 22:29:46,366 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-03-19 22:29:46,402 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2022-03-19 22:29:46,402 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 22:29:46,402 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-19 22:29:46,404 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 22:29:46,835 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 10 proven. 61 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-03-19 22:29:46,835 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 22:29:47,476 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 10 proven. 61 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-03-19 22:29:47,476 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [240489986] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 22:29:47,476 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 22:29:47,476 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 18, 18] total 48 [2022-03-19 22:29:47,476 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [827677947] [2022-03-19 22:29:47,476 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-19 22:29:47,477 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2022-03-19 22:29:47,477 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 22:29:47,477 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2022-03-19 22:29:47,478 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=272, Invalid=1984, Unknown=0, NotChecked=0, Total=2256 [2022-03-19 22:29:47,478 INFO L87 Difference]: Start difference. First operand 112 states and 132 transitions. Second operand has 48 states, 47 states have (on average 1.5319148936170213) internal successors, (72), 45 states have internal predecessors, (72), 17 states have call successors, (20), 4 states have call predecessors, (20), 1 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2022-03-19 22:29:48,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 22:29:48,553 INFO L93 Difference]: Finished difference Result 141 states and 160 transitions. [2022-03-19 22:29:48,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-03-19 22:29:48,555 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 47 states have (on average 1.5319148936170213) internal successors, (72), 45 states have internal predecessors, (72), 17 states have call successors, (20), 4 states have call predecessors, (20), 1 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) Word has length 55 [2022-03-19 22:29:48,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 22:29:48,555 INFO L225 Difference]: With dead ends: 141 [2022-03-19 22:29:48,556 INFO L226 Difference]: Without dead ends: 97 [2022-03-19 22:29:48,557 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 92 SyntacticMatches, 3 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1319 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=630, Invalid=4920, Unknown=0, NotChecked=0, Total=5550 [2022-03-19 22:29:48,557 INFO L913 BasicCegarLoop]: 17 mSDtfsCounter, 62 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 710 mSolverCounterSat, 83 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 99 SdHoareTripleChecker+Invalid, 793 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 83 IncrementalHoareTripleChecker+Valid, 710 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-19 22:29:48,557 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [63 Valid, 99 Invalid, 793 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [83 Valid, 710 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-19 22:29:48,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2022-03-19 22:29:48,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 96. [2022-03-19 22:29:48,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 69 states have (on average 1.0869565217391304) internal successors, (75), 73 states have internal predecessors, (75), 19 states have call successors, (19), 8 states have call predecessors, (19), 7 states have return successors, (18), 14 states have call predecessors, (18), 18 states have call successors, (18) [2022-03-19 22:29:48,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 112 transitions. [2022-03-19 22:29:48,573 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 112 transitions. Word has length 55 [2022-03-19 22:29:48,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 22:29:48,573 INFO L478 AbstractCegarLoop]: Abstraction has 96 states and 112 transitions. [2022-03-19 22:29:48,573 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 47 states have (on average 1.5319148936170213) internal successors, (72), 45 states have internal predecessors, (72), 17 states have call successors, (20), 4 states have call predecessors, (20), 1 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2022-03-19 22:29:48,573 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 112 transitions. [2022-03-19 22:29:48,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-03-19 22:29:48,574 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 22:29:48,574 INFO L499 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 22:29:48,605 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-03-19 22:29:48,790 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-03-19 22:29:48,791 INFO L403 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 22:29:48,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 22:29:48,791 INFO L85 PathProgramCache]: Analyzing trace with hash -1763922298, now seen corresponding path program 7 times [2022-03-19 22:29:48,791 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 22:29:48,791 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1113661472] [2022-03-19 22:29:48,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 22:29:48,791 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 22:29:48,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:29:49,146 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 22:29:49,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:29:49,148 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-03-19 22:29:49,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:29:49,152 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-03-19 22:29:49,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:29:49,156 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-03-19 22:29:49,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:29:49,160 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-03-19 22:29:49,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:29:49,164 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2022-03-19 22:29:49,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:29:49,169 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2022-03-19 22:29:49,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:29:49,172 INFO L134 CoverageAnalysis]: Checked inductivity of 157 backedges. 47 proven. 50 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-03-19 22:29:49,172 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 22:29:49,172 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1113661472] [2022-03-19 22:29:49,173 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1113661472] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 22:29:49,173 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [93082631] [2022-03-19 22:29:49,173 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-19 22:29:49,173 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 22:29:49,173 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 22:29:49,174 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 22:29:49,205 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-03-19 22:29:49,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:29:49,213 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-19 22:29:49,215 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 22:29:49,586 INFO L134 CoverageAnalysis]: Checked inductivity of 157 backedges. 12 proven. 85 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-03-19 22:29:49,586 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 22:29:50,398 INFO L134 CoverageAnalysis]: Checked inductivity of 157 backedges. 12 proven. 85 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-03-19 22:29:50,398 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [93082631] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 22:29:50,398 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 22:29:50,398 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 20, 20] total 47 [2022-03-19 22:29:50,399 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [597929960] [2022-03-19 22:29:50,399 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-19 22:29:50,400 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2022-03-19 22:29:50,400 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 22:29:50,401 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2022-03-19 22:29:50,401 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=301, Invalid=1861, Unknown=0, NotChecked=0, Total=2162 [2022-03-19 22:29:50,401 INFO L87 Difference]: Start difference. First operand 96 states and 112 transitions. Second operand has 47 states, 46 states have (on average 1.608695652173913) internal successors, (74), 44 states have internal predecessors, (74), 20 states have call successors, (23), 4 states have call predecessors, (23), 1 states have return successors, (19), 19 states have call predecessors, (19), 19 states have call successors, (19) [2022-03-19 22:29:52,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 22:29:52,310 INFO L93 Difference]: Finished difference Result 166 states and 195 transitions. [2022-03-19 22:29:52,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-03-19 22:29:52,310 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 46 states have (on average 1.608695652173913) internal successors, (74), 44 states have internal predecessors, (74), 20 states have call successors, (23), 4 states have call predecessors, (23), 1 states have return successors, (19), 19 states have call predecessors, (19), 19 states have call successors, (19) Word has length 63 [2022-03-19 22:29:52,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 22:29:52,313 INFO L225 Difference]: With dead ends: 166 [2022-03-19 22:29:52,313 INFO L226 Difference]: Without dead ends: 123 [2022-03-19 22:29:52,315 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 112 SyntacticMatches, 4 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1899 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=1007, Invalid=6475, Unknown=0, NotChecked=0, Total=7482 [2022-03-19 22:29:52,315 INFO L913 BasicCegarLoop]: 18 mSDtfsCounter, 157 mSDsluCounter, 117 mSDsCounter, 0 mSdLazyCounter, 1289 mSolverCounterSat, 190 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 158 SdHoareTripleChecker+Valid, 135 SdHoareTripleChecker+Invalid, 1479 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 190 IncrementalHoareTripleChecker+Valid, 1289 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-19 22:29:52,315 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [158 Valid, 135 Invalid, 1479 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [190 Valid, 1289 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-19 22:29:52,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2022-03-19 22:29:52,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 122. [2022-03-19 22:29:52,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122 states, 88 states have (on average 1.1022727272727273) internal successors, (97), 92 states have internal predecessors, (97), 25 states have call successors, (25), 9 states have call predecessors, (25), 8 states have return successors, (24), 20 states have call predecessors, (24), 24 states have call successors, (24) [2022-03-19 22:29:52,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 146 transitions. [2022-03-19 22:29:52,339 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 146 transitions. Word has length 63 [2022-03-19 22:29:52,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 22:29:52,340 INFO L478 AbstractCegarLoop]: Abstraction has 122 states and 146 transitions. [2022-03-19 22:29:52,340 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 46 states have (on average 1.608695652173913) internal successors, (74), 44 states have internal predecessors, (74), 20 states have call successors, (23), 4 states have call predecessors, (23), 1 states have return successors, (19), 19 states have call predecessors, (19), 19 states have call successors, (19) [2022-03-19 22:29:52,340 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 146 transitions. [2022-03-19 22:29:52,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-03-19 22:29:52,341 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 22:29:52,341 INFO L499 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 22:29:52,373 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-03-19 22:29:52,558 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-03-19 22:29:52,559 INFO L403 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 22:29:52,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 22:29:52,559 INFO L85 PathProgramCache]: Analyzing trace with hash -1529865243, now seen corresponding path program 8 times [2022-03-19 22:29:52,559 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 22:29:52,559 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2060895177] [2022-03-19 22:29:52,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 22:29:52,559 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 22:29:52,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:29:53,016 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 22:29:53,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:29:53,020 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-03-19 22:29:53,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:29:53,029 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-03-19 22:29:53,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:29:53,039 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2022-03-19 22:29:53,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:29:53,042 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-03-19 22:29:53,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:29:53,044 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2022-03-19 22:29:53,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:29:53,047 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2022-03-19 22:29:53,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:29:53,050 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2022-03-19 22:29:53,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:29:53,054 INFO L134 CoverageAnalysis]: Checked inductivity of 211 backedges. 65 proven. 62 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2022-03-19 22:29:53,054 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 22:29:53,054 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2060895177] [2022-03-19 22:29:53,054 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2060895177] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 22:29:53,054 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [380177292] [2022-03-19 22:29:53,054 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 22:29:53,054 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 22:29:53,054 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 22:29:53,055 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 22:29:53,075 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-03-19 22:29:53,116 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 22:29:53,116 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 22:29:53,117 INFO L263 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 37 conjunts are in the unsatisfiable core [2022-03-19 22:29:53,119 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 22:29:53,525 INFO L134 CoverageAnalysis]: Checked inductivity of 211 backedges. 14 proven. 113 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2022-03-19 22:29:53,525 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 22:29:54,396 INFO L134 CoverageAnalysis]: Checked inductivity of 211 backedges. 14 proven. 113 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2022-03-19 22:29:54,397 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [380177292] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 22:29:54,397 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 22:29:54,397 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 22, 22] total 52 [2022-03-19 22:29:54,397 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1702997295] [2022-03-19 22:29:54,397 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-19 22:29:54,399 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2022-03-19 22:29:54,399 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 22:29:54,399 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2022-03-19 22:29:54,406 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=367, Invalid=2285, Unknown=0, NotChecked=0, Total=2652 [2022-03-19 22:29:54,406 INFO L87 Difference]: Start difference. First operand 122 states and 146 transitions. Second operand has 52 states, 51 states have (on average 1.607843137254902) internal successors, (82), 49 states have internal predecessors, (82), 23 states have call successors, (26), 4 states have call predecessors, (26), 1 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) [2022-03-19 22:29:56,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 22:29:56,706 INFO L93 Difference]: Finished difference Result 191 states and 226 transitions. [2022-03-19 22:29:56,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2022-03-19 22:29:56,706 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 51 states have (on average 1.607843137254902) internal successors, (82), 49 states have internal predecessors, (82), 23 states have call successors, (26), 4 states have call predecessors, (26), 1 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) Word has length 71 [2022-03-19 22:29:56,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 22:29:56,708 INFO L225 Difference]: With dead ends: 191 [2022-03-19 22:29:56,708 INFO L226 Difference]: Without dead ends: 141 [2022-03-19 22:29:56,710 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 225 GetRequests, 127 SyntacticMatches, 4 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2352 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=1215, Invalid=7905, Unknown=0, NotChecked=0, Total=9120 [2022-03-19 22:29:56,710 INFO L913 BasicCegarLoop]: 19 mSDtfsCounter, 179 mSDsluCounter, 132 mSDsCounter, 0 mSdLazyCounter, 1631 mSolverCounterSat, 237 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 180 SdHoareTripleChecker+Valid, 151 SdHoareTripleChecker+Invalid, 1868 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 237 IncrementalHoareTripleChecker+Valid, 1631 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-19 22:29:56,710 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [180 Valid, 151 Invalid, 1868 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [237 Valid, 1631 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-03-19 22:29:56,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2022-03-19 22:29:56,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 139. [2022-03-19 22:29:56,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139 states, 100 states have (on average 1.1) internal successors, (110), 105 states have internal predecessors, (110), 30 states have call successors, (30), 9 states have call predecessors, (30), 8 states have return successors, (29), 24 states have call predecessors, (29), 29 states have call successors, (29) [2022-03-19 22:29:56,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 169 transitions. [2022-03-19 22:29:56,731 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 169 transitions. Word has length 71 [2022-03-19 22:29:56,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 22:29:56,731 INFO L478 AbstractCegarLoop]: Abstraction has 139 states and 169 transitions. [2022-03-19 22:29:56,732 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 51 states have (on average 1.607843137254902) internal successors, (82), 49 states have internal predecessors, (82), 23 states have call successors, (26), 4 states have call predecessors, (26), 1 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) [2022-03-19 22:29:56,732 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 169 transitions. [2022-03-19 22:29:56,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-03-19 22:29:56,732 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 22:29:56,732 INFO L499 BasicCegarLoop]: trace histogram [15, 7, 7, 7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 22:29:56,749 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-03-19 22:29:56,944 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-03-19 22:29:56,944 INFO L403 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 22:29:56,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 22:29:56,945 INFO L85 PathProgramCache]: Analyzing trace with hash 1065374854, now seen corresponding path program 9 times [2022-03-19 22:29:56,945 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 22:29:56,945 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1950908713] [2022-03-19 22:29:56,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 22:29:56,945 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 22:29:56,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:29:57,191 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 22:29:57,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:29:57,194 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-03-19 22:29:57,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:29:57,196 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2022-03-19 22:29:57,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:29:57,197 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-03-19 22:29:57,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:29:57,199 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2022-03-19 22:29:57,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:29:57,201 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2022-03-19 22:29:57,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:29:57,203 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2022-03-19 22:29:57,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:29:57,205 INFO L134 CoverageAnalysis]: Checked inductivity of 249 backedges. 103 proven. 86 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-03-19 22:29:57,205 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 22:29:57,205 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1950908713] [2022-03-19 22:29:57,205 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1950908713] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 22:29:57,205 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1171184041] [2022-03-19 22:29:57,205 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-19 22:29:57,205 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 22:29:57,205 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 22:29:57,206 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 22:29:57,219 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-03-19 22:29:57,262 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2022-03-19 22:29:57,262 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 22:29:57,263 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 41 conjunts are in the unsatisfiable core [2022-03-19 22:29:57,265 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 22:29:57,711 INFO L134 CoverageAnalysis]: Checked inductivity of 249 backedges. 12 proven. 177 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-03-19 22:29:57,711 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 22:29:58,210 INFO L134 CoverageAnalysis]: Checked inductivity of 249 backedges. 12 proven. 177 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-03-19 22:29:58,210 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1171184041] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 22:29:58,210 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 22:29:58,210 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 26, 26] total 66 [2022-03-19 22:29:58,210 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [357654763] [2022-03-19 22:29:58,210 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-19 22:29:58,211 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2022-03-19 22:29:58,211 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 22:29:58,211 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2022-03-19 22:29:58,212 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=841, Invalid=3449, Unknown=0, NotChecked=0, Total=4290 [2022-03-19 22:29:58,213 INFO L87 Difference]: Start difference. First operand 139 states and 169 transitions. Second operand has 66 states, 66 states have (on average 1.3636363636363635) internal successors, (90), 63 states have internal predecessors, (90), 15 states have call successors, (18), 4 states have call predecessors, (18), 1 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2022-03-19 22:29:59,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 22:29:59,698 INFO L93 Difference]: Finished difference Result 297 states and 376 transitions. [2022-03-19 22:29:59,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-03-19 22:29:59,698 INFO L78 Accepts]: Start accepts. Automaton has has 66 states, 66 states have (on average 1.3636363636363635) internal successors, (90), 63 states have internal predecessors, (90), 15 states have call successors, (18), 4 states have call predecessors, (18), 1 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) Word has length 71 [2022-03-19 22:29:59,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 22:29:59,700 INFO L225 Difference]: With dead ends: 297 [2022-03-19 22:29:59,700 INFO L226 Difference]: Without dead ends: 295 [2022-03-19 22:29:59,702 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 228 GetRequests, 116 SyntacticMatches, 2 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3810 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=2735, Invalid=9697, Unknown=0, NotChecked=0, Total=12432 [2022-03-19 22:29:59,702 INFO L913 BasicCegarLoop]: 24 mSDtfsCounter, 206 mSDsluCounter, 122 mSDsCounter, 0 mSdLazyCounter, 1926 mSolverCounterSat, 370 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 207 SdHoareTripleChecker+Valid, 146 SdHoareTripleChecker+Invalid, 2296 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 370 IncrementalHoareTripleChecker+Valid, 1926 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-19 22:29:59,702 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [207 Valid, 146 Invalid, 2296 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [370 Valid, 1926 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-03-19 22:29:59,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 295 states. [2022-03-19 22:29:59,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 295 to 272. [2022-03-19 22:29:59,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 272 states, 189 states have (on average 1.052910052910053) internal successors, (199), 197 states have internal predecessors, (199), 73 states have call successors, (73), 10 states have call predecessors, (73), 9 states have return successors, (72), 64 states have call predecessors, (72), 72 states have call successors, (72) [2022-03-19 22:29:59,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 272 states to 272 states and 344 transitions. [2022-03-19 22:29:59,768 INFO L78 Accepts]: Start accepts. Automaton has 272 states and 344 transitions. Word has length 71 [2022-03-19 22:29:59,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 22:29:59,768 INFO L478 AbstractCegarLoop]: Abstraction has 272 states and 344 transitions. [2022-03-19 22:29:59,768 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 66 states have (on average 1.3636363636363635) internal successors, (90), 63 states have internal predecessors, (90), 15 states have call successors, (18), 4 states have call predecessors, (18), 1 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2022-03-19 22:29:59,768 INFO L276 IsEmpty]: Start isEmpty. Operand 272 states and 344 transitions. [2022-03-19 22:29:59,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2022-03-19 22:29:59,769 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 22:29:59,769 INFO L499 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 22:29:59,786 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-03-19 22:29:59,973 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-03-19 22:29:59,974 INFO L403 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 22:29:59,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 22:29:59,974 INFO L85 PathProgramCache]: Analyzing trace with hash -995114586, now seen corresponding path program 10 times [2022-03-19 22:29:59,974 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 22:29:59,974 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [639145755] [2022-03-19 22:29:59,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 22:29:59,974 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 22:29:59,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:30:00,439 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 22:30:00,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:30:00,443 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-03-19 22:30:00,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:30:00,447 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2022-03-19 22:30:00,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:30:00,450 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-03-19 22:30:00,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:30:00,452 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2022-03-19 22:30:00,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:30:00,468 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-03-19 22:30:00,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:30:00,470 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2022-03-19 22:30:00,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:30:00,473 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2022-03-19 22:30:00,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:30:00,475 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2022-03-19 22:30:00,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:30:00,479 INFO L134 CoverageAnalysis]: Checked inductivity of 273 backedges. 86 proven. 75 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2022-03-19 22:30:00,479 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 22:30:00,479 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [639145755] [2022-03-19 22:30:00,479 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [639145755] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 22:30:00,479 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [561511207] [2022-03-19 22:30:00,479 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 22:30:00,479 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 22:30:00,479 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 22:30:00,492 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 22:30:00,493 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-03-19 22:30:00,532 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 22:30:00,533 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 22:30:00,533 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 41 conjunts are in the unsatisfiable core [2022-03-19 22:30:00,535 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 22:30:01,050 INFO L134 CoverageAnalysis]: Checked inductivity of 273 backedges. 16 proven. 145 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2022-03-19 22:30:01,050 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 22:30:02,072 INFO L134 CoverageAnalysis]: Checked inductivity of 273 backedges. 16 proven. 145 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2022-03-19 22:30:02,072 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [561511207] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 22:30:02,072 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 22:30:02,072 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 24, 24] total 57 [2022-03-19 22:30:02,072 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1393983984] [2022-03-19 22:30:02,072 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-19 22:30:02,073 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2022-03-19 22:30:02,073 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 22:30:02,073 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2022-03-19 22:30:02,073 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=440, Invalid=2752, Unknown=0, NotChecked=0, Total=3192 [2022-03-19 22:30:02,074 INFO L87 Difference]: Start difference. First operand 272 states and 344 transitions. Second operand has 57 states, 56 states have (on average 1.6071428571428572) internal successors, (90), 54 states have internal predecessors, (90), 26 states have call successors, (29), 4 states have call predecessors, (29), 1 states have return successors, (25), 25 states have call predecessors, (25), 25 states have call successors, (25) [2022-03-19 22:30:04,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 22:30:04,828 INFO L93 Difference]: Finished difference Result 359 states and 442 transitions. [2022-03-19 22:30:04,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-03-19 22:30:04,829 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 56 states have (on average 1.6071428571428572) internal successors, (90), 54 states have internal predecessors, (90), 26 states have call successors, (29), 4 states have call predecessors, (29), 1 states have return successors, (25), 25 states have call predecessors, (25), 25 states have call successors, (25) Word has length 79 [2022-03-19 22:30:04,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 22:30:04,830 INFO L225 Difference]: With dead ends: 359 [2022-03-19 22:30:04,830 INFO L226 Difference]: Without dead ends: 302 [2022-03-19 22:30:04,831 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 249 GetRequests, 142 SyntacticMatches, 4 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2800 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=1443, Invalid=9477, Unknown=0, NotChecked=0, Total=10920 [2022-03-19 22:30:04,832 INFO L913 BasicCegarLoop]: 20 mSDtfsCounter, 200 mSDsluCounter, 142 mSDsCounter, 0 mSdLazyCounter, 1842 mSolverCounterSat, 272 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 201 SdHoareTripleChecker+Valid, 162 SdHoareTripleChecker+Invalid, 2114 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 272 IncrementalHoareTripleChecker+Valid, 1842 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-03-19 22:30:04,832 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [201 Valid, 162 Invalid, 2114 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [272 Valid, 1842 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-03-19 22:30:04,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 302 states. [2022-03-19 22:30:04,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 302 to 296. [2022-03-19 22:30:04,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 296 states, 206 states have (on average 1.0533980582524272) internal successors, (217), 214 states have internal predecessors, (217), 79 states have call successors, (79), 11 states have call predecessors, (79), 10 states have return successors, (78), 70 states have call predecessors, (78), 78 states have call successors, (78) [2022-03-19 22:30:04,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 296 states to 296 states and 374 transitions. [2022-03-19 22:30:04,884 INFO L78 Accepts]: Start accepts. Automaton has 296 states and 374 transitions. Word has length 79 [2022-03-19 22:30:04,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 22:30:04,884 INFO L478 AbstractCegarLoop]: Abstraction has 296 states and 374 transitions. [2022-03-19 22:30:04,885 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 56 states have (on average 1.6071428571428572) internal successors, (90), 54 states have internal predecessors, (90), 26 states have call successors, (29), 4 states have call predecessors, (29), 1 states have return successors, (25), 25 states have call predecessors, (25), 25 states have call successors, (25) [2022-03-19 22:30:04,885 INFO L276 IsEmpty]: Start isEmpty. Operand 296 states and 374 transitions. [2022-03-19 22:30:04,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2022-03-19 22:30:04,886 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 22:30:04,886 INFO L499 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 22:30:04,903 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-03-19 22:30:05,090 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-03-19 22:30:05,090 INFO L403 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 22:30:05,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 22:30:05,091 INFO L85 PathProgramCache]: Analyzing trace with hash 1146838213, now seen corresponding path program 11 times [2022-03-19 22:30:05,091 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 22:30:05,091 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2107391902] [2022-03-19 22:30:05,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 22:30:05,091 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 22:30:05,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:30:05,652 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 22:30:05,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:30:05,655 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-03-19 22:30:05,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:30:05,658 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-03-19 22:30:05,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:30:05,660 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-03-19 22:30:05,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:30:05,664 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2022-03-19 22:30:05,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:30:05,666 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2022-03-19 22:30:05,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:30:05,671 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-03-19 22:30:05,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:30:05,673 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2022-03-19 22:30:05,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:30:05,684 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2022-03-19 22:30:05,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:30:05,686 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2022-03-19 22:30:05,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:30:05,700 INFO L134 CoverageAnalysis]: Checked inductivity of 343 backedges. 110 proven. 89 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2022-03-19 22:30:05,701 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 22:30:05,701 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2107391902] [2022-03-19 22:30:05,701 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2107391902] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 22:30:05,701 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [428838603] [2022-03-19 22:30:05,701 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-19 22:30:05,701 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 22:30:05,701 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 22:30:05,712 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 22:30:05,713 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-03-19 22:30:05,758 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2022-03-19 22:30:05,758 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 22:30:05,759 INFO L263 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 45 conjunts are in the unsatisfiable core [2022-03-19 22:30:05,760 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 22:30:06,328 INFO L134 CoverageAnalysis]: Checked inductivity of 343 backedges. 18 proven. 181 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2022-03-19 22:30:06,328 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 22:30:07,550 INFO L134 CoverageAnalysis]: Checked inductivity of 343 backedges. 18 proven. 181 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2022-03-19 22:30:07,551 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [428838603] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 22:30:07,551 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 22:30:07,551 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 26, 26] total 62 [2022-03-19 22:30:07,551 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [26978166] [2022-03-19 22:30:07,551 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-19 22:30:07,551 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 62 states [2022-03-19 22:30:07,551 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 22:30:07,552 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2022-03-19 22:30:07,552 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=520, Invalid=3262, Unknown=0, NotChecked=0, Total=3782 [2022-03-19 22:30:07,552 INFO L87 Difference]: Start difference. First operand 296 states and 374 transitions. Second operand has 62 states, 61 states have (on average 1.6065573770491803) internal successors, (98), 59 states have internal predecessors, (98), 29 states have call successors, (32), 4 states have call predecessors, (32), 1 states have return successors, (28), 28 states have call predecessors, (28), 28 states have call successors, (28) [2022-03-19 22:30:10,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 22:30:10,905 INFO L93 Difference]: Finished difference Result 382 states and 471 transitions. [2022-03-19 22:30:10,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-03-19 22:30:10,906 INFO L78 Accepts]: Start accepts. Automaton has has 62 states, 61 states have (on average 1.6065573770491803) internal successors, (98), 59 states have internal predecessors, (98), 29 states have call successors, (32), 4 states have call predecessors, (32), 1 states have return successors, (28), 28 states have call predecessors, (28), 28 states have call successors, (28) Word has length 87 [2022-03-19 22:30:10,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 22:30:10,907 INFO L225 Difference]: With dead ends: 382 [2022-03-19 22:30:10,907 INFO L226 Difference]: Without dead ends: 318 [2022-03-19 22:30:10,909 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 273 GetRequests, 157 SyntacticMatches, 4 SemanticMatches, 112 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3353 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=1691, Invalid=11191, Unknown=0, NotChecked=0, Total=12882 [2022-03-19 22:30:10,909 INFO L913 BasicCegarLoop]: 21 mSDtfsCounter, 222 mSDsluCounter, 167 mSDsCounter, 0 mSdLazyCounter, 2385 mSolverCounterSat, 277 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 223 SdHoareTripleChecker+Valid, 188 SdHoareTripleChecker+Invalid, 2662 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 277 IncrementalHoareTripleChecker+Valid, 2385 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-03-19 22:30:10,909 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [223 Valid, 188 Invalid, 2662 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [277 Valid, 2385 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-03-19 22:30:10,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 318 states. [2022-03-19 22:30:10,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 318 to 313. [2022-03-19 22:30:10,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 313 states, 218 states have (on average 1.055045871559633) internal successors, (230), 226 states have internal predecessors, (230), 84 states have call successors, (84), 11 states have call predecessors, (84), 10 states have return successors, (83), 75 states have call predecessors, (83), 83 states have call successors, (83) [2022-03-19 22:30:10,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 313 states to 313 states and 397 transitions. [2022-03-19 22:30:10,975 INFO L78 Accepts]: Start accepts. Automaton has 313 states and 397 transitions. Word has length 87 [2022-03-19 22:30:10,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 22:30:10,975 INFO L478 AbstractCegarLoop]: Abstraction has 313 states and 397 transitions. [2022-03-19 22:30:10,976 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 62 states, 61 states have (on average 1.6065573770491803) internal successors, (98), 59 states have internal predecessors, (98), 29 states have call successors, (32), 4 states have call predecessors, (32), 1 states have return successors, (28), 28 states have call predecessors, (28), 28 states have call successors, (28) [2022-03-19 22:30:10,976 INFO L276 IsEmpty]: Start isEmpty. Operand 313 states and 397 transitions. [2022-03-19 22:30:10,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2022-03-19 22:30:10,979 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 22:30:10,979 INFO L499 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 22:30:10,998 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-03-19 22:30:11,195 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 22:30:11,196 INFO L403 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 22:30:11,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 22:30:11,196 INFO L85 PathProgramCache]: Analyzing trace with hash 2008014022, now seen corresponding path program 12 times [2022-03-19 22:30:11,196 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 22:30:11,196 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [534855291] [2022-03-19 22:30:11,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 22:30:11,196 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 22:30:11,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:30:11,740 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 22:30:11,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:30:11,751 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-03-19 22:30:11,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:30:11,767 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2022-03-19 22:30:11,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:30:11,770 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2022-03-19 22:30:11,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:30:11,771 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2022-03-19 22:30:11,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:30:11,773 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2022-03-19 22:30:11,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:30:11,775 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2022-03-19 22:30:11,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:30:11,777 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2022-03-19 22:30:11,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:30:11,779 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2022-03-19 22:30:11,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:30:11,781 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2022-03-19 22:30:11,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:30:11,787 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2022-03-19 22:30:11,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:30:11,790 INFO L134 CoverageAnalysis]: Checked inductivity of 421 backedges. 137 proven. 104 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2022-03-19 22:30:11,790 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 22:30:11,790 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [534855291] [2022-03-19 22:30:11,790 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [534855291] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 22:30:11,790 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [86462166] [2022-03-19 22:30:11,790 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-19 22:30:11,790 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 22:30:11,790 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 22:30:11,791 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 22:30:11,811 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-03-19 22:30:11,850 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2022-03-19 22:30:11,850 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 22:30:11,851 INFO L263 TraceCheckSpWp]: Trace formula consists of 252 conjuncts, 39 conjunts are in the unsatisfiable core [2022-03-19 22:30:11,853 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 22:30:12,468 INFO L134 CoverageAnalysis]: Checked inductivity of 421 backedges. 20 proven. 221 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2022-03-19 22:30:12,468 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 22:30:13,561 INFO L134 CoverageAnalysis]: Checked inductivity of 421 backedges. 20 proven. 221 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2022-03-19 22:30:13,561 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [86462166] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 22:30:13,561 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 22:30:13,561 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 28, 28] total 78 [2022-03-19 22:30:13,561 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [116611377] [2022-03-19 22:30:13,561 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-19 22:30:13,562 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 78 states [2022-03-19 22:30:13,562 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 22:30:13,562 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2022-03-19 22:30:13,563 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=687, Invalid=5319, Unknown=0, NotChecked=0, Total=6006 [2022-03-19 22:30:13,563 INFO L87 Difference]: Start difference. First operand 313 states and 397 transitions. Second operand has 78 states, 77 states have (on average 1.5194805194805194) internal successors, (117), 75 states have internal predecessors, (117), 32 states have call successors, (35), 4 states have call predecessors, (35), 1 states have return successors, (31), 31 states have call predecessors, (31), 31 states have call successors, (31) [2022-03-19 22:30:16,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 22:30:16,298 INFO L93 Difference]: Finished difference Result 350 states and 429 transitions. [2022-03-19 22:30:16,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-03-19 22:30:16,298 INFO L78 Accepts]: Start accepts. Automaton has has 78 states, 77 states have (on average 1.5194805194805194) internal successors, (117), 75 states have internal predecessors, (117), 32 states have call successors, (35), 4 states have call predecessors, (35), 1 states have return successors, (31), 31 states have call predecessors, (31), 31 states have call successors, (31) Word has length 95 [2022-03-19 22:30:16,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 22:30:16,300 INFO L225 Difference]: With dead ends: 350 [2022-03-19 22:30:16,300 INFO L226 Difference]: Without dead ends: 283 [2022-03-19 22:30:16,301 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 283 GetRequests, 162 SyntacticMatches, 3 SemanticMatches, 118 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3564 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=1535, Invalid=12745, Unknown=0, NotChecked=0, Total=14280 [2022-03-19 22:30:16,302 INFO L913 BasicCegarLoop]: 22 mSDtfsCounter, 76 mSDsluCounter, 127 mSDsCounter, 0 mSdLazyCounter, 1586 mSolverCounterSat, 157 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 149 SdHoareTripleChecker+Invalid, 1743 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 157 IncrementalHoareTripleChecker+Valid, 1586 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-19 22:30:16,302 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [77 Valid, 149 Invalid, 1743 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [157 Valid, 1586 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-19 22:30:16,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 283 states. [2022-03-19 22:30:16,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 283 to 283. [2022-03-19 22:30:16,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 283 states, 198 states have (on average 1.0555555555555556) internal successors, (209), 205 states have internal predecessors, (209), 74 states have call successors, (74), 11 states have call predecessors, (74), 10 states have return successors, (73), 66 states have call predecessors, (73), 73 states have call successors, (73) [2022-03-19 22:30:16,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 283 states to 283 states and 356 transitions. [2022-03-19 22:30:16,386 INFO L78 Accepts]: Start accepts. Automaton has 283 states and 356 transitions. Word has length 95 [2022-03-19 22:30:16,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 22:30:16,387 INFO L478 AbstractCegarLoop]: Abstraction has 283 states and 356 transitions. [2022-03-19 22:30:16,387 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 78 states, 77 states have (on average 1.5194805194805194) internal successors, (117), 75 states have internal predecessors, (117), 32 states have call successors, (35), 4 states have call predecessors, (35), 1 states have return successors, (31), 31 states have call predecessors, (31), 31 states have call successors, (31) [2022-03-19 22:30:16,387 INFO L276 IsEmpty]: Start isEmpty. Operand 283 states and 356 transitions. [2022-03-19 22:30:16,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2022-03-19 22:30:16,388 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 22:30:16,388 INFO L499 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 22:30:16,407 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-03-19 22:30:16,588 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-03-19 22:30:16,589 INFO L403 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 22:30:16,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 22:30:16,589 INFO L85 PathProgramCache]: Analyzing trace with hash -1873767003, now seen corresponding path program 13 times [2022-03-19 22:30:16,589 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 22:30:16,589 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [44905201] [2022-03-19 22:30:16,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 22:30:16,589 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 22:30:16,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:30:17,119 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 22:30:17,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:30:17,121 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2022-03-19 22:30:17,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:30:17,144 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-03-19 22:30:17,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:30:17,163 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-03-19 22:30:17,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:30:17,165 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-03-19 22:30:17,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:30:17,168 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2022-03-19 22:30:17,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:30:17,171 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2022-03-19 22:30:17,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:30:17,172 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2022-03-19 22:30:17,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:30:17,174 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2022-03-19 22:30:17,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:30:17,176 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2022-03-19 22:30:17,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:30:17,185 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2022-03-19 22:30:17,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:30:17,187 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2022-03-19 22:30:17,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:30:17,191 INFO L134 CoverageAnalysis]: Checked inductivity of 507 backedges. 167 proven. 120 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2022-03-19 22:30:17,191 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 22:30:17,191 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [44905201] [2022-03-19 22:30:17,191 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [44905201] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 22:30:17,191 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1040894781] [2022-03-19 22:30:17,191 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-19 22:30:17,191 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 22:30:17,191 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 22:30:17,192 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 22:30:17,227 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-03-19 22:30:17,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:30:17,248 INFO L263 TraceCheckSpWp]: Trace formula consists of 271 conjuncts, 53 conjunts are in the unsatisfiable core [2022-03-19 22:30:17,250 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 22:30:18,020 INFO L134 CoverageAnalysis]: Checked inductivity of 507 backedges. 22 proven. 265 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2022-03-19 22:30:18,020 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 22:30:19,532 INFO L134 CoverageAnalysis]: Checked inductivity of 507 backedges. 22 proven. 265 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2022-03-19 22:30:19,532 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1040894781] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 22:30:19,532 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 22:30:19,532 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 30, 30] total 72 [2022-03-19 22:30:19,532 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [709130762] [2022-03-19 22:30:19,532 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-19 22:30:19,532 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 72 states [2022-03-19 22:30:19,533 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 22:30:19,533 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2022-03-19 22:30:19,533 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=701, Invalid=4411, Unknown=0, NotChecked=0, Total=5112 [2022-03-19 22:30:19,534 INFO L87 Difference]: Start difference. First operand 283 states and 356 transitions. Second operand has 72 states, 71 states have (on average 1.6056338028169015) internal successors, (114), 69 states have internal predecessors, (114), 35 states have call successors, (38), 4 states have call predecessors, (38), 1 states have return successors, (34), 34 states have call predecessors, (34), 34 states have call successors, (34) [2022-03-19 22:30:23,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 22:30:23,701 INFO L93 Difference]: Finished difference Result 382 states and 470 transitions. [2022-03-19 22:30:23,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2022-03-19 22:30:23,701 INFO L78 Accepts]: Start accepts. Automaton has has 72 states, 71 states have (on average 1.6056338028169015) internal successors, (114), 69 states have internal predecessors, (114), 35 states have call successors, (38), 4 states have call predecessors, (38), 1 states have return successors, (34), 34 states have call predecessors, (34), 34 states have call successors, (34) Word has length 103 [2022-03-19 22:30:23,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 22:30:23,703 INFO L225 Difference]: With dead ends: 382 [2022-03-19 22:30:23,703 INFO L226 Difference]: Without dead ends: 312 [2022-03-19 22:30:23,704 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 321 GetRequests, 187 SyntacticMatches, 4 SemanticMatches, 130 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4454 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=2247, Invalid=15045, Unknown=0, NotChecked=0, Total=17292 [2022-03-19 22:30:23,704 INFO L913 BasicCegarLoop]: 23 mSDtfsCounter, 270 mSDsluCounter, 157 mSDsCounter, 0 mSdLazyCounter, 2709 mSolverCounterSat, 375 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 271 SdHoareTripleChecker+Valid, 180 SdHoareTripleChecker+Invalid, 3084 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 375 IncrementalHoareTripleChecker+Valid, 2709 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-03-19 22:30:23,705 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [271 Valid, 180 Invalid, 3084 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [375 Valid, 2709 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-03-19 22:30:23,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 312 states. [2022-03-19 22:30:23,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 312 to 309. [2022-03-19 22:30:23,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 309 states, 217 states have (on average 1.064516129032258) internal successors, (231), 224 states have internal predecessors, (231), 80 states have call successors, (80), 12 states have call predecessors, (80), 11 states have return successors, (79), 72 states have call predecessors, (79), 79 states have call successors, (79) [2022-03-19 22:30:23,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 309 states to 309 states and 390 transitions. [2022-03-19 22:30:23,769 INFO L78 Accepts]: Start accepts. Automaton has 309 states and 390 transitions. Word has length 103 [2022-03-19 22:30:23,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 22:30:23,769 INFO L478 AbstractCegarLoop]: Abstraction has 309 states and 390 transitions. [2022-03-19 22:30:23,770 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 72 states, 71 states have (on average 1.6056338028169015) internal successors, (114), 69 states have internal predecessors, (114), 35 states have call successors, (38), 4 states have call predecessors, (38), 1 states have return successors, (34), 34 states have call predecessors, (34), 34 states have call successors, (34) [2022-03-19 22:30:23,770 INFO L276 IsEmpty]: Start isEmpty. Operand 309 states and 390 transitions. [2022-03-19 22:30:23,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2022-03-19 22:30:23,771 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 22:30:23,771 INFO L499 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 22:30:23,787 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-03-19 22:30:23,975 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-03-19 22:30:23,975 INFO L403 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 22:30:23,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 22:30:23,975 INFO L85 PathProgramCache]: Analyzing trace with hash -1636892698, now seen corresponding path program 14 times [2022-03-19 22:30:23,975 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 22:30:23,976 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1540904871] [2022-03-19 22:30:23,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 22:30:23,976 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 22:30:23,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:30:24,730 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 22:30:24,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:30:24,732 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-03-19 22:30:24,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:30:24,735 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2022-03-19 22:30:24,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:30:24,737 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2022-03-19 22:30:24,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:30:24,740 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2022-03-19 22:30:24,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:30:24,743 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2022-03-19 22:30:24,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:30:24,745 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2022-03-19 22:30:24,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:30:24,747 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2022-03-19 22:30:24,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:30:24,749 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2022-03-19 22:30:24,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:30:24,751 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2022-03-19 22:30:24,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:30:24,753 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2022-03-19 22:30:24,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:30:24,756 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2022-03-19 22:30:24,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:30:24,758 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2022-03-19 22:30:24,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:30:24,761 INFO L134 CoverageAnalysis]: Checked inductivity of 601 backedges. 200 proven. 137 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2022-03-19 22:30:24,762 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 22:30:24,762 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1540904871] [2022-03-19 22:30:24,762 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1540904871] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 22:30:24,762 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [824332586] [2022-03-19 22:30:24,762 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 22:30:24,762 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 22:30:24,762 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 22:30:24,763 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 22:30:24,764 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-03-19 22:30:24,811 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 22:30:24,812 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 22:30:24,813 INFO L263 TraceCheckSpWp]: Trace formula consists of 290 conjuncts, 82 conjunts are in the unsatisfiable core [2022-03-19 22:30:24,815 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 22:30:26,003 INFO L134 CoverageAnalysis]: Checked inductivity of 601 backedges. 24 proven. 313 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2022-03-19 22:30:26,003 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 22:30:27,819 INFO L134 CoverageAnalysis]: Checked inductivity of 601 backedges. 24 proven. 313 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2022-03-19 22:30:27,819 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [824332586] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 22:30:27,819 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 22:30:27,819 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 32, 32] total 90 [2022-03-19 22:30:27,819 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1480223332] [2022-03-19 22:30:27,819 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-19 22:30:27,820 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 90 states [2022-03-19 22:30:27,820 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 22:30:27,820 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 90 interpolants. [2022-03-19 22:30:27,821 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1022, Invalid=6988, Unknown=0, NotChecked=0, Total=8010 [2022-03-19 22:30:27,821 INFO L87 Difference]: Start difference. First operand 309 states and 390 transitions. Second operand has 90 states, 89 states have (on average 1.5168539325842696) internal successors, (135), 87 states have internal predecessors, (135), 38 states have call successors, (41), 4 states have call predecessors, (41), 1 states have return successors, (37), 37 states have call predecessors, (37), 37 states have call successors, (37) [2022-03-19 22:30:32,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 22:30:32,755 INFO L93 Difference]: Finished difference Result 400 states and 490 transitions. [2022-03-19 22:30:32,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2022-03-19 22:30:32,756 INFO L78 Accepts]: Start accepts. Automaton has has 90 states, 89 states have (on average 1.5168539325842696) internal successors, (135), 87 states have internal predecessors, (135), 38 states have call successors, (41), 4 states have call predecessors, (41), 1 states have return successors, (37), 37 states have call predecessors, (37), 37 states have call successors, (37) Word has length 111 [2022-03-19 22:30:32,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 22:30:32,757 INFO L225 Difference]: With dead ends: 400 [2022-03-19 22:30:32,757 INFO L226 Difference]: Without dead ends: 323 [2022-03-19 22:30:32,758 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 345 GetRequests, 190 SyntacticMatches, 3 SemanticMatches, 152 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6903 ImplicationChecksByTransitivity, 6.0s TimeCoverageRelationStatistics Valid=2789, Invalid=20773, Unknown=0, NotChecked=0, Total=23562 [2022-03-19 22:30:32,759 INFO L913 BasicCegarLoop]: 24 mSDtfsCounter, 295 mSDsluCounter, 172 mSDsCounter, 0 mSdLazyCounter, 3192 mSolverCounterSat, 404 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 296 SdHoareTripleChecker+Valid, 196 SdHoareTripleChecker+Invalid, 3596 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 404 IncrementalHoareTripleChecker+Valid, 3192 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-03-19 22:30:32,759 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [296 Valid, 196 Invalid, 3596 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [404 Valid, 3192 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-03-19 22:30:32,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 323 states. [2022-03-19 22:30:32,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 323 to 321. [2022-03-19 22:30:32,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 321 states, 226 states have (on average 1.0663716814159292) internal successors, (241), 233 states have internal predecessors, (241), 82 states have call successors, (82), 13 states have call predecessors, (82), 12 states have return successors, (81), 74 states have call predecessors, (81), 81 states have call successors, (81) [2022-03-19 22:30:32,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 321 states to 321 states and 404 transitions. [2022-03-19 22:30:32,822 INFO L78 Accepts]: Start accepts. Automaton has 321 states and 404 transitions. Word has length 111 [2022-03-19 22:30:32,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 22:30:32,822 INFO L478 AbstractCegarLoop]: Abstraction has 321 states and 404 transitions. [2022-03-19 22:30:32,823 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 90 states, 89 states have (on average 1.5168539325842696) internal successors, (135), 87 states have internal predecessors, (135), 38 states have call successors, (41), 4 states have call predecessors, (41), 1 states have return successors, (37), 37 states have call predecessors, (37), 37 states have call successors, (37) [2022-03-19 22:30:32,823 INFO L276 IsEmpty]: Start isEmpty. Operand 321 states and 404 transitions. [2022-03-19 22:30:32,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2022-03-19 22:30:32,824 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 22:30:32,824 INFO L499 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 22:30:32,841 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-03-19 22:30:33,038 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-03-19 22:30:33,039 INFO L403 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 22:30:33,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 22:30:33,039 INFO L85 PathProgramCache]: Analyzing trace with hash -773994875, now seen corresponding path program 15 times [2022-03-19 22:30:33,039 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 22:30:33,039 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [261753413] [2022-03-19 22:30:33,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 22:30:33,039 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 22:30:33,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:30:33,863 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 22:30:33,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:30:33,866 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-03-19 22:30:33,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:30:33,869 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-03-19 22:30:33,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:30:33,871 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-03-19 22:30:33,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:30:33,872 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2022-03-19 22:30:33,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:30:33,874 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2022-03-19 22:30:33,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:30:33,876 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2022-03-19 22:30:33,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:30:33,878 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2022-03-19 22:30:33,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:30:33,880 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2022-03-19 22:30:33,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:30:33,882 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2022-03-19 22:30:33,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:30:33,884 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2022-03-19 22:30:33,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:30:33,886 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2022-03-19 22:30:33,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:30:33,888 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2022-03-19 22:30:33,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:30:33,890 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 108 [2022-03-19 22:30:33,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:30:33,893 INFO L134 CoverageAnalysis]: Checked inductivity of 703 backedges. 236 proven. 155 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2022-03-19 22:30:33,893 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 22:30:33,893 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [261753413] [2022-03-19 22:30:33,893 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [261753413] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 22:30:33,893 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [403264579] [2022-03-19 22:30:33,893 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-19 22:30:33,893 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 22:30:33,893 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 22:30:33,894 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 22:30:33,895 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-03-19 22:30:33,951 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 14 check-sat command(s) [2022-03-19 22:30:33,952 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 22:30:33,953 INFO L263 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 48 conjunts are in the unsatisfiable core [2022-03-19 22:30:33,954 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 22:30:34,982 INFO L134 CoverageAnalysis]: Checked inductivity of 703 backedges. 26 proven. 365 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2022-03-19 22:30:34,982 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 22:30:36,399 INFO L134 CoverageAnalysis]: Checked inductivity of 703 backedges. 26 proven. 365 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2022-03-19 22:30:36,399 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [403264579] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 22:30:36,399 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 22:30:36,399 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 34, 34] total 96 [2022-03-19 22:30:36,399 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1509264327] [2022-03-19 22:30:36,399 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-19 22:30:36,400 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 96 states [2022-03-19 22:30:36,400 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 22:30:36,400 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 96 interpolants. [2022-03-19 22:30:36,401 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1032, Invalid=8088, Unknown=0, NotChecked=0, Total=9120 [2022-03-19 22:30:36,401 INFO L87 Difference]: Start difference. First operand 321 states and 404 transitions. Second operand has 96 states, 95 states have (on average 1.5157894736842106) internal successors, (144), 93 states have internal predecessors, (144), 41 states have call successors, (44), 4 states have call predecessors, (44), 1 states have return successors, (40), 40 states have call predecessors, (40), 40 states have call successors, (40) [2022-03-19 22:30:40,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 22:30:40,144 INFO L93 Difference]: Finished difference Result 370 states and 447 transitions. [2022-03-19 22:30:40,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2022-03-19 22:30:40,144 INFO L78 Accepts]: Start accepts. Automaton has has 96 states, 95 states have (on average 1.5157894736842106) internal successors, (144), 93 states have internal predecessors, (144), 41 states have call successors, (44), 4 states have call predecessors, (44), 1 states have return successors, (40), 40 states have call predecessors, (40), 40 states have call successors, (40) Word has length 119 [2022-03-19 22:30:40,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 22:30:40,149 INFO L225 Difference]: With dead ends: 370 [2022-03-19 22:30:40,149 INFO L226 Difference]: Without dead ends: 282 [2022-03-19 22:30:40,151 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 352 GetRequests, 204 SyntacticMatches, 3 SemanticMatches, 145 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5427 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=2282, Invalid=19180, Unknown=0, NotChecked=0, Total=21462 [2022-03-19 22:30:40,151 INFO L913 BasicCegarLoop]: 25 mSDtfsCounter, 92 mSDsluCounter, 142 mSDsCounter, 0 mSdLazyCounter, 2065 mSolverCounterSat, 222 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 167 SdHoareTripleChecker+Invalid, 2287 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 222 IncrementalHoareTripleChecker+Valid, 2065 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-19 22:30:40,152 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [93 Valid, 167 Invalid, 2287 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [222 Valid, 2065 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-03-19 22:30:40,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 282 states. [2022-03-19 22:30:40,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 282 to 281. [2022-03-19 22:30:40,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 281 states, 199 states have (on average 1.07035175879397) internal successors, (213), 206 states have internal predecessors, (213), 70 states have call successors, (70), 12 states have call predecessors, (70), 11 states have return successors, (69), 62 states have call predecessors, (69), 69 states have call successors, (69) [2022-03-19 22:30:40,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 281 states to 281 states and 352 transitions. [2022-03-19 22:30:40,226 INFO L78 Accepts]: Start accepts. Automaton has 281 states and 352 transitions. Word has length 119 [2022-03-19 22:30:40,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 22:30:40,226 INFO L478 AbstractCegarLoop]: Abstraction has 281 states and 352 transitions. [2022-03-19 22:30:40,227 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 96 states, 95 states have (on average 1.5157894736842106) internal successors, (144), 93 states have internal predecessors, (144), 41 states have call successors, (44), 4 states have call predecessors, (44), 1 states have return successors, (40), 40 states have call predecessors, (40), 40 states have call successors, (40) [2022-03-19 22:30:40,227 INFO L276 IsEmpty]: Start isEmpty. Operand 281 states and 352 transitions. [2022-03-19 22:30:40,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2022-03-19 22:30:40,228 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 22:30:40,228 INFO L499 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 22:30:40,245 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-03-19 22:30:40,443 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 22:30:40,443 INFO L403 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 22:30:40,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 22:30:40,444 INFO L85 PathProgramCache]: Analyzing trace with hash 1073687302, now seen corresponding path program 16 times [2022-03-19 22:30:40,444 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 22:30:40,444 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [235280345] [2022-03-19 22:30:40,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 22:30:40,444 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 22:30:40,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:30:41,141 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 22:30:41,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:30:41,143 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-03-19 22:30:41,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:30:41,160 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2022-03-19 22:30:41,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:30:41,163 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-03-19 22:30:41,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:30:41,165 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2022-03-19 22:30:41,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:30:41,170 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2022-03-19 22:30:41,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:30:41,172 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2022-03-19 22:30:41,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:30:41,174 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2022-03-19 22:30:41,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:30:41,176 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2022-03-19 22:30:41,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:30:41,178 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2022-03-19 22:30:41,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:30:41,188 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2022-03-19 22:30:41,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:30:41,190 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2022-03-19 22:30:41,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:30:41,192 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 102 [2022-03-19 22:30:41,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:30:41,195 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 109 [2022-03-19 22:30:41,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:30:41,197 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 116 [2022-03-19 22:30:41,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:30:41,200 INFO L134 CoverageAnalysis]: Checked inductivity of 813 backedges. 275 proven. 174 refuted. 0 times theorem prover too weak. 364 trivial. 0 not checked. [2022-03-19 22:30:41,200 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 22:30:41,200 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [235280345] [2022-03-19 22:30:41,200 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [235280345] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 22:30:41,200 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [78044977] [2022-03-19 22:30:41,200 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 22:30:41,201 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 22:30:41,201 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 22:30:41,216 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 22:30:41,246 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-03-19 22:30:41,272 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 22:30:41,272 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 22:30:41,273 INFO L263 TraceCheckSpWp]: Trace formula consists of 328 conjuncts, 65 conjunts are in the unsatisfiable core [2022-03-19 22:30:41,275 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 22:30:41,946 INFO L134 CoverageAnalysis]: Checked inductivity of 813 backedges. 28 proven. 421 refuted. 0 times theorem prover too weak. 364 trivial. 0 not checked. [2022-03-19 22:30:41,946 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 22:30:43,397 INFO L134 CoverageAnalysis]: Checked inductivity of 813 backedges. 28 proven. 421 refuted. 0 times theorem prover too weak. 364 trivial. 0 not checked. [2022-03-19 22:30:43,397 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [78044977] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 22:30:43,397 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 22:30:43,397 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 36, 36] total 87 [2022-03-19 22:30:43,397 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [176379314] [2022-03-19 22:30:43,397 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-19 22:30:43,398 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 87 states [2022-03-19 22:30:43,398 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 22:30:43,398 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 87 interpolants. [2022-03-19 22:30:43,399 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1025, Invalid=6457, Unknown=0, NotChecked=0, Total=7482 [2022-03-19 22:30:43,399 INFO L87 Difference]: Start difference. First operand 281 states and 352 transitions. Second operand has 87 states, 86 states have (on average 1.6046511627906976) internal successors, (138), 84 states have internal predecessors, (138), 44 states have call successors, (47), 4 states have call predecessors, (47), 1 states have return successors, (43), 43 states have call predecessors, (43), 43 states have call successors, (43) [2022-03-19 22:30:48,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 22:30:48,985 INFO L93 Difference]: Finished difference Result 415 states and 511 transitions. [2022-03-19 22:30:48,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2022-03-19 22:30:48,986 INFO L78 Accepts]: Start accepts. Automaton has has 87 states, 86 states have (on average 1.6046511627906976) internal successors, (138), 84 states have internal predecessors, (138), 44 states have call successors, (47), 4 states have call predecessors, (47), 1 states have return successors, (43), 43 states have call predecessors, (43), 43 states have call successors, (43) Word has length 127 [2022-03-19 22:30:48,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 22:30:48,987 INFO L225 Difference]: With dead ends: 415 [2022-03-19 22:30:48,987 INFO L226 Difference]: Without dead ends: 332 [2022-03-19 22:30:48,988 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 393 GetRequests, 232 SyntacticMatches, 4 SemanticMatches, 157 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6507 ImplicationChecksByTransitivity, 5.8s TimeCoverageRelationStatistics Valid=3231, Invalid=21891, Unknown=0, NotChecked=0, Total=25122 [2022-03-19 22:30:48,989 INFO L913 BasicCegarLoop]: 26 mSDtfsCounter, 357 mSDsluCounter, 197 mSDsCounter, 0 mSdLazyCounter, 3948 mSolverCounterSat, 528 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 358 SdHoareTripleChecker+Valid, 223 SdHoareTripleChecker+Invalid, 4476 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 528 IncrementalHoareTripleChecker+Valid, 3948 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-03-19 22:30:48,989 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [358 Valid, 223 Invalid, 4476 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [528 Valid, 3948 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-03-19 22:30:48,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 332 states. [2022-03-19 22:30:49,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 332 to 331. [2022-03-19 22:30:49,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 331 states, 234 states have (on average 1.0726495726495726) internal successors, (251), 241 states have internal predecessors, (251), 84 states have call successors, (84), 13 states have call predecessors, (84), 12 states have return successors, (83), 76 states have call predecessors, (83), 83 states have call successors, (83) [2022-03-19 22:30:49,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 331 states to 331 states and 418 transitions. [2022-03-19 22:30:49,067 INFO L78 Accepts]: Start accepts. Automaton has 331 states and 418 transitions. Word has length 127 [2022-03-19 22:30:49,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 22:30:49,067 INFO L478 AbstractCegarLoop]: Abstraction has 331 states and 418 transitions. [2022-03-19 22:30:49,068 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 87 states, 86 states have (on average 1.6046511627906976) internal successors, (138), 84 states have internal predecessors, (138), 44 states have call successors, (47), 4 states have call predecessors, (47), 1 states have return successors, (43), 43 states have call predecessors, (43), 43 states have call successors, (43) [2022-03-19 22:30:49,068 INFO L276 IsEmpty]: Start isEmpty. Operand 331 states and 418 transitions. [2022-03-19 22:30:49,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2022-03-19 22:30:49,069 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 22:30:49,069 INFO L499 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 22:30:49,086 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-03-19 22:30:49,285 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 22:30:49,286 INFO L403 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 22:30:49,286 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 22:30:49,286 INFO L85 PathProgramCache]: Analyzing trace with hash -1448022171, now seen corresponding path program 17 times [2022-03-19 22:30:49,286 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 22:30:49,286 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [184514915] [2022-03-19 22:30:49,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 22:30:49,286 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 22:30:49,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:30:50,239 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 22:30:50,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:30:50,243 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2022-03-19 22:30:50,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:30:50,245 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-03-19 22:30:50,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:30:50,247 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2022-03-19 22:30:50,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:30:50,248 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-03-19 22:30:50,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:30:50,250 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2022-03-19 22:30:50,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:30:50,252 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2022-03-19 22:30:50,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:30:50,254 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2022-03-19 22:30:50,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:30:50,256 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2022-03-19 22:30:50,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:30:50,258 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2022-03-19 22:30:50,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:30:50,260 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2022-03-19 22:30:50,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:30:50,262 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2022-03-19 22:30:50,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:30:50,264 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2022-03-19 22:30:50,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:30:50,266 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 110 [2022-03-19 22:30:50,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:30:50,268 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 117 [2022-03-19 22:30:50,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:30:50,269 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 124 [2022-03-19 22:30:50,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:30:50,272 INFO L134 CoverageAnalysis]: Checked inductivity of 931 backedges. 317 proven. 194 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked. [2022-03-19 22:30:50,272 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 22:30:50,272 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [184514915] [2022-03-19 22:30:50,272 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [184514915] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 22:30:50,272 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [83801067] [2022-03-19 22:30:50,272 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-19 22:30:50,272 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 22:30:50,272 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 22:30:50,273 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 22:30:50,274 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-03-19 22:30:50,335 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 16 check-sat command(s) [2022-03-19 22:30:50,335 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 22:30:50,337 INFO L263 TraceCheckSpWp]: Trace formula consists of 347 conjuncts, 69 conjunts are in the unsatisfiable core [2022-03-19 22:30:50,339 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 22:30:51,354 INFO L134 CoverageAnalysis]: Checked inductivity of 931 backedges. 30 proven. 481 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked. [2022-03-19 22:30:51,354 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 22:30:53,679 INFO L134 CoverageAnalysis]: Checked inductivity of 931 backedges. 30 proven. 481 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked. [2022-03-19 22:30:53,679 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [83801067] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 22:30:53,679 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 22:30:53,679 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 38, 38] total 92 [2022-03-19 22:30:53,679 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1710620635] [2022-03-19 22:30:53,679 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-19 22:30:53,680 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 92 states [2022-03-19 22:30:53,680 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 22:30:53,680 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 92 interpolants. [2022-03-19 22:30:53,681 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1147, Invalid=7225, Unknown=0, NotChecked=0, Total=8372 [2022-03-19 22:30:53,681 INFO L87 Difference]: Start difference. First operand 331 states and 418 transitions. Second operand has 92 states, 91 states have (on average 1.6043956043956045) internal successors, (146), 89 states have internal predecessors, (146), 47 states have call successors, (50), 4 states have call predecessors, (50), 1 states have return successors, (46), 46 states have call predecessors, (46), 46 states have call successors, (46) [2022-03-19 22:31:00,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 22:31:00,009 INFO L93 Difference]: Finished difference Result 452 states and 558 transitions. [2022-03-19 22:31:00,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2022-03-19 22:31:00,011 INFO L78 Accepts]: Start accepts. Automaton has has 92 states, 91 states have (on average 1.6043956043956045) internal successors, (146), 89 states have internal predecessors, (146), 47 states have call successors, (50), 4 states have call predecessors, (50), 1 states have return successors, (46), 46 states have call predecessors, (46), 46 states have call successors, (46) Word has length 135 [2022-03-19 22:31:00,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 22:31:00,013 INFO L225 Difference]: With dead ends: 452 [2022-03-19 22:31:00,013 INFO L226 Difference]: Without dead ends: 362 [2022-03-19 22:31:00,015 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 417 GetRequests, 247 SyntacticMatches, 4 SemanticMatches, 166 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7312 ImplicationChecksByTransitivity, 7.3s TimeCoverageRelationStatistics Valid=3599, Invalid=24457, Unknown=0, NotChecked=0, Total=28056 [2022-03-19 22:31:00,016 INFO L913 BasicCegarLoop]: 27 mSDtfsCounter, 386 mSDsluCounter, 207 mSDsCounter, 0 mSdLazyCounter, 4413 mSolverCounterSat, 522 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 387 SdHoareTripleChecker+Valid, 234 SdHoareTripleChecker+Invalid, 4935 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 522 IncrementalHoareTripleChecker+Valid, 4413 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-03-19 22:31:00,016 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [387 Valid, 234 Invalid, 4935 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [522 Valid, 4413 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-03-19 22:31:00,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 362 states. [2022-03-19 22:31:00,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 362 to 360. [2022-03-19 22:31:00,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 360 states, 254 states have (on average 1.0708661417322836) internal successors, (272), 262 states have internal predecessors, (272), 93 states have call successors, (93), 13 states have call predecessors, (93), 12 states have return successors, (92), 84 states have call predecessors, (92), 92 states have call successors, (92) [2022-03-19 22:31:00,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 360 states to 360 states and 457 transitions. [2022-03-19 22:31:00,114 INFO L78 Accepts]: Start accepts. Automaton has 360 states and 457 transitions. Word has length 135 [2022-03-19 22:31:00,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 22:31:00,114 INFO L478 AbstractCegarLoop]: Abstraction has 360 states and 457 transitions. [2022-03-19 22:31:00,114 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 92 states, 91 states have (on average 1.6043956043956045) internal successors, (146), 89 states have internal predecessors, (146), 47 states have call successors, (50), 4 states have call predecessors, (50), 1 states have return successors, (46), 46 states have call predecessors, (46), 46 states have call successors, (46) [2022-03-19 22:31:00,114 INFO L276 IsEmpty]: Start isEmpty. Operand 360 states and 457 transitions. [2022-03-19 22:31:00,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2022-03-19 22:31:00,115 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 22:31:00,115 INFO L499 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 22:31:00,148 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-03-19 22:31:00,348 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2022-03-19 22:31:00,348 INFO L403 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 22:31:00,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 22:31:00,348 INFO L85 PathProgramCache]: Analyzing trace with hash -1678615002, now seen corresponding path program 18 times [2022-03-19 22:31:00,348 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 22:31:00,348 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [481167245] [2022-03-19 22:31:00,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 22:31:00,348 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 22:31:00,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:31:01,372 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 22:31:01,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:31:01,377 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-03-19 22:31:01,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:31:01,403 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-03-19 22:31:01,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:31:01,407 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2022-03-19 22:31:01,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:31:01,410 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2022-03-19 22:31:01,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:31:01,411 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-03-19 22:31:01,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:31:01,413 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2022-03-19 22:31:01,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:31:01,415 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2022-03-19 22:31:01,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:31:01,417 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2022-03-19 22:31:01,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:31:01,419 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2022-03-19 22:31:01,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:31:01,428 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2022-03-19 22:31:01,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:31:01,430 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2022-03-19 22:31:01,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:31:01,431 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2022-03-19 22:31:01,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:31:01,433 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2022-03-19 22:31:01,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:31:01,435 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2022-03-19 22:31:01,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:31:01,437 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 125 [2022-03-19 22:31:01,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:31:01,438 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 132 [2022-03-19 22:31:01,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:31:01,452 INFO L134 CoverageAnalysis]: Checked inductivity of 1057 backedges. 362 proven. 215 refuted. 0 times theorem prover too weak. 480 trivial. 0 not checked. [2022-03-19 22:31:01,453 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 22:31:01,453 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [481167245] [2022-03-19 22:31:01,453 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [481167245] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 22:31:01,453 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1303626361] [2022-03-19 22:31:01,453 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-19 22:31:01,453 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 22:31:01,453 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 22:31:01,468 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 22:31:01,469 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-03-19 22:31:01,533 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 17 check-sat command(s) [2022-03-19 22:31:01,533 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 22:31:01,534 INFO L263 TraceCheckSpWp]: Trace formula consists of 366 conjuncts, 57 conjunts are in the unsatisfiable core [2022-03-19 22:31:01,536 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 22:31:03,140 INFO L134 CoverageAnalysis]: Checked inductivity of 1057 backedges. 32 proven. 545 refuted. 0 times theorem prover too weak. 480 trivial. 0 not checked. [2022-03-19 22:31:03,140 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 22:31:05,084 INFO L134 CoverageAnalysis]: Checked inductivity of 1057 backedges. 32 proven. 545 refuted. 0 times theorem prover too weak. 480 trivial. 0 not checked. [2022-03-19 22:31:05,085 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1303626361] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 22:31:05,085 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 22:31:05,085 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 40, 40] total 114 [2022-03-19 22:31:05,085 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2049710744] [2022-03-19 22:31:05,085 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-19 22:31:05,085 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 114 states [2022-03-19 22:31:05,085 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 22:31:05,086 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 114 interpolants. [2022-03-19 22:31:05,086 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1449, Invalid=11433, Unknown=0, NotChecked=0, Total=12882 [2022-03-19 22:31:05,087 INFO L87 Difference]: Start difference. First operand 360 states and 457 transitions. Second operand has 114 states, 113 states have (on average 1.5132743362831858) internal successors, (171), 111 states have internal predecessors, (171), 50 states have call successors, (53), 4 states have call predecessors, (53), 1 states have return successors, (49), 49 states have call predecessors, (49), 49 states have call successors, (49) [2022-03-19 22:31:10,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 22:31:10,771 INFO L93 Difference]: Finished difference Result 454 states and 558 transitions. [2022-03-19 22:31:10,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2022-03-19 22:31:10,773 INFO L78 Accepts]: Start accepts. Automaton has has 114 states, 113 states have (on average 1.5132743362831858) internal successors, (171), 111 states have internal predecessors, (171), 50 states have call successors, (53), 4 states have call predecessors, (53), 1 states have return successors, (49), 49 states have call predecessors, (49), 49 states have call successors, (49) Word has length 143 [2022-03-19 22:31:10,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 22:31:10,774 INFO L225 Difference]: With dead ends: 454 [2022-03-19 22:31:10,774 INFO L226 Difference]: Without dead ends: 357 [2022-03-19 22:31:10,776 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 421 GetRequests, 246 SyntacticMatches, 3 SemanticMatches, 172 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7677 ImplicationChecksByTransitivity, 8.0s TimeCoverageRelationStatistics Valid=3182, Invalid=26920, Unknown=0, NotChecked=0, Total=30102 [2022-03-19 22:31:10,776 INFO L913 BasicCegarLoop]: 28 mSDtfsCounter, 105 mSDsluCounter, 147 mSDsCounter, 0 mSdLazyCounter, 2571 mSolverCounterSat, 276 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 106 SdHoareTripleChecker+Valid, 175 SdHoareTripleChecker+Invalid, 2847 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 276 IncrementalHoareTripleChecker+Valid, 2571 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-03-19 22:31:10,776 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [106 Valid, 175 Invalid, 2847 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [276 Valid, 2571 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-03-19 22:31:10,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 357 states. [2022-03-19 22:31:10,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 357 to 357. [2022-03-19 22:31:10,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 357 states, 252 states have (on average 1.0674603174603174) internal successors, (269), 259 states have internal predecessors, (269), 92 states have call successors, (92), 13 states have call predecessors, (92), 12 states have return successors, (91), 84 states have call predecessors, (91), 91 states have call successors, (91) [2022-03-19 22:31:10,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 357 states to 357 states and 452 transitions. [2022-03-19 22:31:10,871 INFO L78 Accepts]: Start accepts. Automaton has 357 states and 452 transitions. Word has length 143 [2022-03-19 22:31:10,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 22:31:10,871 INFO L478 AbstractCegarLoop]: Abstraction has 357 states and 452 transitions. [2022-03-19 22:31:10,872 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 114 states, 113 states have (on average 1.5132743362831858) internal successors, (171), 111 states have internal predecessors, (171), 50 states have call successors, (53), 4 states have call predecessors, (53), 1 states have return successors, (49), 49 states have call predecessors, (49), 49 states have call successors, (49) [2022-03-19 22:31:10,872 INFO L276 IsEmpty]: Start isEmpty. Operand 357 states and 452 transitions. [2022-03-19 22:31:10,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2022-03-19 22:31:10,873 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 22:31:10,873 INFO L499 BasicCegarLoop]: trace histogram [18, 17, 17, 17, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 22:31:10,890 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2022-03-19 22:31:11,087 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2022-03-19 22:31:11,087 INFO L403 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 22:31:11,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 22:31:11,088 INFO L85 PathProgramCache]: Analyzing trace with hash -2099834382, now seen corresponding path program 19 times [2022-03-19 22:31:11,088 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 22:31:11,088 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [714038326] [2022-03-19 22:31:11,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 22:31:11,088 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 22:31:11,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:31:11,536 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 22:31:11,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:31:11,538 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2022-03-19 22:31:11,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:31:11,540 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2022-03-19 22:31:11,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:31:11,541 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2022-03-19 22:31:11,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:31:11,543 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2022-03-19 22:31:11,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:31:11,544 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2022-03-19 22:31:11,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:31:11,545 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2022-03-19 22:31:11,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:31:11,547 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2022-03-19 22:31:11,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:31:11,548 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2022-03-19 22:31:11,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:31:11,549 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2022-03-19 22:31:11,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:31:11,551 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2022-03-19 22:31:11,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:31:11,552 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2022-03-19 22:31:11,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:31:11,554 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2022-03-19 22:31:11,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:31:11,555 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 112 [2022-03-19 22:31:11,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:31:11,556 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 119 [2022-03-19 22:31:11,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:31:11,558 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 126 [2022-03-19 22:31:11,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:31:11,559 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 133 [2022-03-19 22:31:11,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:31:11,561 INFO L134 CoverageAnalysis]: Checked inductivity of 1075 backedges. 168 proven. 427 refuted. 0 times theorem prover too weak. 480 trivial. 0 not checked. [2022-03-19 22:31:11,562 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 22:31:11,562 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [714038326] [2022-03-19 22:31:11,562 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [714038326] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 22:31:11,562 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1883936770] [2022-03-19 22:31:11,562 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-19 22:31:11,562 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 22:31:11,562 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 22:31:11,563 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 22:31:11,593 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-03-19 22:31:11,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:31:11,621 INFO L263 TraceCheckSpWp]: Trace formula consists of 371 conjuncts, 57 conjunts are in the unsatisfiable core [2022-03-19 22:31:11,623 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 22:31:12,127 INFO L134 CoverageAnalysis]: Checked inductivity of 1075 backedges. 32 proven. 563 refuted. 0 times theorem prover too weak. 480 trivial. 0 not checked. [2022-03-19 22:31:12,127 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 22:31:12,559 INFO L134 CoverageAnalysis]: Checked inductivity of 1075 backedges. 32 proven. 563 refuted. 0 times theorem prover too weak. 480 trivial. 0 not checked. [2022-03-19 22:31:12,559 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1883936770] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 22:31:12,559 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 22:31:12,559 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 39, 39] total 78 [2022-03-19 22:31:12,559 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1203774986] [2022-03-19 22:31:12,560 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-19 22:31:12,560 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 78 states [2022-03-19 22:31:12,560 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 22:31:12,560 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2022-03-19 22:31:12,561 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=923, Invalid=5083, Unknown=0, NotChecked=0, Total=6006 [2022-03-19 22:31:12,561 INFO L87 Difference]: Start difference. First operand 357 states and 452 transitions. Second operand has 78 states, 78 states have (on average 1.3333333333333333) internal successors, (104), 75 states have internal predecessors, (104), 18 states have call successors, (21), 4 states have call predecessors, (21), 1 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) [2022-03-19 22:31:13,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 22:31:13,665 INFO L93 Difference]: Finished difference Result 376 states and 474 transitions. [2022-03-19 22:31:13,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-03-19 22:31:13,665 INFO L78 Accepts]: Start accepts. Automaton has has 78 states, 78 states have (on average 1.3333333333333333) internal successors, (104), 75 states have internal predecessors, (104), 18 states have call successors, (21), 4 states have call predecessors, (21), 1 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) Word has length 144 [2022-03-19 22:31:13,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 22:31:13,666 INFO L225 Difference]: With dead ends: 376 [2022-03-19 22:31:13,666 INFO L226 Difference]: Without dead ends: 374 [2022-03-19 22:31:13,668 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 400 GetRequests, 282 SyntacticMatches, 3 SemanticMatches, 115 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3793 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=2312, Invalid=11260, Unknown=0, NotChecked=0, Total=13572 [2022-03-19 22:31:13,668 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 164 mSDsluCounter, 147 mSDsCounter, 0 mSdLazyCounter, 1431 mSolverCounterSat, 358 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 165 SdHoareTripleChecker+Valid, 159 SdHoareTripleChecker+Invalid, 1789 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 358 IncrementalHoareTripleChecker+Valid, 1431 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-19 22:31:13,668 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [165 Valid, 159 Invalid, 1789 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [358 Valid, 1431 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-19 22:31:13,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 374 states. [2022-03-19 22:31:13,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 374 to 370. [2022-03-19 22:31:13,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 370 states, 261 states have (on average 1.0651340996168583) internal successors, (278), 268 states have internal predecessors, (278), 95 states have call successors, (95), 14 states have call predecessors, (95), 13 states have return successors, (94), 87 states have call predecessors, (94), 94 states have call successors, (94) [2022-03-19 22:31:13,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 370 states to 370 states and 467 transitions. [2022-03-19 22:31:13,752 INFO L78 Accepts]: Start accepts. Automaton has 370 states and 467 transitions. Word has length 144 [2022-03-19 22:31:13,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 22:31:13,754 INFO L478 AbstractCegarLoop]: Abstraction has 370 states and 467 transitions. [2022-03-19 22:31:13,754 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 78 states, 78 states have (on average 1.3333333333333333) internal successors, (104), 75 states have internal predecessors, (104), 18 states have call successors, (21), 4 states have call predecessors, (21), 1 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) [2022-03-19 22:31:13,754 INFO L276 IsEmpty]: Start isEmpty. Operand 370 states and 467 transitions. [2022-03-19 22:31:13,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2022-03-19 22:31:13,755 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 22:31:13,755 INFO L499 BasicCegarLoop]: trace histogram [18, 18, 18, 18, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 22:31:13,774 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-03-19 22:31:13,972 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 22:31:13,972 INFO L403 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 22:31:13,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 22:31:13,972 INFO L85 PathProgramCache]: Analyzing trace with hash -268955579, now seen corresponding path program 20 times [2022-03-19 22:31:13,972 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 22:31:13,972 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1929608036] [2022-03-19 22:31:13,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 22:31:13,973 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 22:31:13,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:31:15,105 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 22:31:15,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:31:15,108 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2022-03-19 22:31:15,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:31:15,110 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2022-03-19 22:31:15,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:31:15,111 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2022-03-19 22:31:15,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:31:15,117 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2022-03-19 22:31:15,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:31:15,118 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2022-03-19 22:31:15,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:31:15,120 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2022-03-19 22:31:15,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:31:15,121 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2022-03-19 22:31:15,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:31:15,123 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2022-03-19 22:31:15,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:31:15,126 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2022-03-19 22:31:15,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:31:15,128 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2022-03-19 22:31:15,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:31:15,140 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2022-03-19 22:31:15,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:31:15,143 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2022-03-19 22:31:15,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:31:15,144 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 112 [2022-03-19 22:31:15,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:31:15,146 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 119 [2022-03-19 22:31:15,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:31:15,148 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 126 [2022-03-19 22:31:15,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:31:15,149 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 133 [2022-03-19 22:31:15,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:31:15,151 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 140 [2022-03-19 22:31:15,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:31:15,154 INFO L134 CoverageAnalysis]: Checked inductivity of 1191 backedges. 410 proven. 237 refuted. 0 times theorem prover too weak. 544 trivial. 0 not checked. [2022-03-19 22:31:15,154 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 22:31:15,154 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1929608036] [2022-03-19 22:31:15,154 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1929608036] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 22:31:15,154 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1651274605] [2022-03-19 22:31:15,154 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 22:31:15,154 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 22:31:15,154 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 22:31:15,159 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 22:31:15,160 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-03-19 22:31:15,218 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 22:31:15,218 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 22:31:15,220 INFO L263 TraceCheckSpWp]: Trace formula consists of 385 conjuncts, 112 conjunts are in the unsatisfiable core [2022-03-19 22:31:15,222 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 22:31:16,774 INFO L134 CoverageAnalysis]: Checked inductivity of 1191 backedges. 34 proven. 613 refuted. 0 times theorem prover too weak. 544 trivial. 0 not checked. [2022-03-19 22:31:16,774 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 22:31:19,295 INFO L134 CoverageAnalysis]: Checked inductivity of 1191 backedges. 34 proven. 613 refuted. 0 times theorem prover too weak. 544 trivial. 0 not checked. [2022-03-19 22:31:19,296 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1651274605] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 22:31:19,296 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 22:31:19,296 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 42, 42] total 120 [2022-03-19 22:31:19,296 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1264201125] [2022-03-19 22:31:19,296 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-19 22:31:19,296 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 120 states [2022-03-19 22:31:19,296 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 22:31:19,297 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 120 interpolants. [2022-03-19 22:31:19,298 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1807, Invalid=12473, Unknown=0, NotChecked=0, Total=14280 [2022-03-19 22:31:19,298 INFO L87 Difference]: Start difference. First operand 370 states and 467 transitions. Second operand has 120 states, 119 states have (on average 1.5126050420168067) internal successors, (180), 117 states have internal predecessors, (180), 53 states have call successors, (56), 4 states have call predecessors, (56), 1 states have return successors, (52), 52 states have call predecessors, (52), 52 states have call successors, (52) [2022-03-19 22:31:27,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 22:31:27,493 INFO L93 Difference]: Finished difference Result 506 states and 626 transitions. [2022-03-19 22:31:27,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2022-03-19 22:31:27,494 INFO L78 Accepts]: Start accepts. Automaton has has 120 states, 119 states have (on average 1.5126050420168067) internal successors, (180), 117 states have internal predecessors, (180), 53 states have call successors, (56), 4 states have call predecessors, (56), 1 states have return successors, (52), 52 states have call predecessors, (52), 52 states have call successors, (52) Word has length 151 [2022-03-19 22:31:27,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 22:31:27,495 INFO L225 Difference]: With dead ends: 506 [2022-03-19 22:31:27,495 INFO L226 Difference]: Without dead ends: 406 [2022-03-19 22:31:27,498 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 465 GetRequests, 260 SyntacticMatches, 3 SemanticMatches, 202 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12313 ImplicationChecksByTransitivity, 9.7s TimeCoverageRelationStatistics Valid=4809, Invalid=36603, Unknown=0, NotChecked=0, Total=41412 [2022-03-19 22:31:27,498 INFO L913 BasicCegarLoop]: 29 mSDtfsCounter, 441 mSDsluCounter, 232 mSDsCounter, 0 mSdLazyCounter, 5703 mSolverCounterSat, 679 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 442 SdHoareTripleChecker+Valid, 261 SdHoareTripleChecker+Invalid, 6382 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 679 IncrementalHoareTripleChecker+Valid, 5703 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-03-19 22:31:27,498 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [442 Valid, 261 Invalid, 6382 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [679 Valid, 5703 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2022-03-19 22:31:27,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 406 states. [2022-03-19 22:31:27,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 406 to 404. [2022-03-19 22:31:27,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 404 states, 285 states have (on average 1.0701754385964912) internal successors, (305), 293 states have internal predecessors, (305), 105 states have call successors, (105), 14 states have call predecessors, (105), 13 states have return successors, (104), 96 states have call predecessors, (104), 104 states have call successors, (104) [2022-03-19 22:31:27,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 404 states to 404 states and 514 transitions. [2022-03-19 22:31:27,594 INFO L78 Accepts]: Start accepts. Automaton has 404 states and 514 transitions. Word has length 151 [2022-03-19 22:31:27,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 22:31:27,594 INFO L478 AbstractCegarLoop]: Abstraction has 404 states and 514 transitions. [2022-03-19 22:31:27,594 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 120 states, 119 states have (on average 1.5126050420168067) internal successors, (180), 117 states have internal predecessors, (180), 53 states have call successors, (56), 4 states have call predecessors, (56), 1 states have return successors, (52), 52 states have call predecessors, (52), 52 states have call successors, (52) [2022-03-19 22:31:27,594 INFO L276 IsEmpty]: Start isEmpty. Operand 404 states and 514 transitions. [2022-03-19 22:31:27,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2022-03-19 22:31:27,596 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 22:31:27,596 INFO L499 BasicCegarLoop]: trace histogram [19, 19, 19, 19, 18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 22:31:27,612 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2022-03-19 22:31:27,806 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 22:31:27,807 INFO L403 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 22:31:27,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 22:31:27,807 INFO L85 PathProgramCache]: Analyzing trace with hash 1247451462, now seen corresponding path program 21 times [2022-03-19 22:31:27,807 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 22:31:27,807 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [297836758] [2022-03-19 22:31:27,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 22:31:27,807 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 22:31:27,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:31:29,102 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 22:31:29,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:31:29,104 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-03-19 22:31:29,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:31:29,110 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-03-19 22:31:29,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:31:29,112 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-03-19 22:31:29,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:31:29,114 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2022-03-19 22:31:29,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:31:29,116 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2022-03-19 22:31:29,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:31:29,117 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2022-03-19 22:31:29,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:31:29,119 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2022-03-19 22:31:29,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:31:29,121 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2022-03-19 22:31:29,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:31:29,122 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2022-03-19 22:31:29,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:31:29,124 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2022-03-19 22:31:29,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:31:29,136 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 99 [2022-03-19 22:31:29,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:31:29,139 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 106 [2022-03-19 22:31:29,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:31:29,140 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 113 [2022-03-19 22:31:29,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:31:29,142 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 120 [2022-03-19 22:31:29,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:31:29,144 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 127 [2022-03-19 22:31:29,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:31:29,145 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 134 [2022-03-19 22:31:29,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:31:29,147 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 141 [2022-03-19 22:31:29,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:31:29,150 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 148 [2022-03-19 22:31:29,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:31:29,153 INFO L134 CoverageAnalysis]: Checked inductivity of 1333 backedges. 461 proven. 260 refuted. 0 times theorem prover too weak. 612 trivial. 0 not checked. [2022-03-19 22:31:29,153 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 22:31:29,153 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [297836758] [2022-03-19 22:31:29,153 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [297836758] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 22:31:29,153 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1158160733] [2022-03-19 22:31:29,153 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-19 22:31:29,153 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 22:31:29,154 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 22:31:29,154 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 22:31:29,155 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-03-19 22:31:29,231 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 19 check-sat command(s) [2022-03-19 22:31:29,231 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 22:31:29,233 INFO L263 TraceCheckSpWp]: Trace formula consists of 404 conjuncts, 63 conjunts are in the unsatisfiable core [2022-03-19 22:31:29,235 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 22:31:31,402 INFO L134 CoverageAnalysis]: Checked inductivity of 1333 backedges. 36 proven. 685 refuted. 0 times theorem prover too weak. 612 trivial. 0 not checked. [2022-03-19 22:31:31,403 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 22:31:34,582 INFO L134 CoverageAnalysis]: Checked inductivity of 1333 backedges. 36 proven. 685 refuted. 0 times theorem prover too weak. 612 trivial. 0 not checked. [2022-03-19 22:31:34,582 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1158160733] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 22:31:34,582 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 22:31:34,582 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 44, 44] total 126 [2022-03-19 22:31:34,582 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1768166603] [2022-03-19 22:31:34,582 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-19 22:31:34,583 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 126 states [2022-03-19 22:31:34,583 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 22:31:34,583 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 126 interpolants. [2022-03-19 22:31:34,584 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1767, Invalid=13983, Unknown=0, NotChecked=0, Total=15750 [2022-03-19 22:31:34,585 INFO L87 Difference]: Start difference. First operand 404 states and 514 transitions. Second operand has 126 states, 125 states have (on average 1.512) internal successors, (189), 123 states have internal predecessors, (189), 56 states have call successors, (59), 4 states have call predecessors, (59), 1 states have return successors, (55), 55 states have call predecessors, (55), 55 states have call successors, (55) [2022-03-19 22:31:41,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 22:31:41,554 INFO L93 Difference]: Finished difference Result 508 states and 626 transitions. [2022-03-19 22:31:41,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2022-03-19 22:31:41,555 INFO L78 Accepts]: Start accepts. Automaton has has 126 states, 125 states have (on average 1.512) internal successors, (189), 123 states have internal predecessors, (189), 56 states have call successors, (59), 4 states have call predecessors, (59), 1 states have return successors, (55), 55 states have call predecessors, (55), 55 states have call successors, (55) Word has length 159 [2022-03-19 22:31:41,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 22:31:41,556 INFO L225 Difference]: With dead ends: 508 [2022-03-19 22:31:41,556 INFO L226 Difference]: Without dead ends: 401 [2022-03-19 22:31:41,558 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 467 GetRequests, 274 SyntacticMatches, 3 SemanticMatches, 190 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9392 ImplicationChecksByTransitivity, 10.6s TimeCoverageRelationStatistics Valid=3867, Invalid=32805, Unknown=0, NotChecked=0, Total=36672 [2022-03-19 22:31:41,558 INFO L913 BasicCegarLoop]: 30 mSDtfsCounter, 103 mSDsluCounter, 212 mSDsCounter, 0 mSdLazyCounter, 4070 mSolverCounterSat, 302 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 104 SdHoareTripleChecker+Valid, 242 SdHoareTripleChecker+Invalid, 4372 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 302 IncrementalHoareTripleChecker+Valid, 4070 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-03-19 22:31:41,559 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [104 Valid, 242 Invalid, 4372 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [302 Valid, 4070 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-03-19 22:31:41,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 401 states. [2022-03-19 22:31:41,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 401 to 401. [2022-03-19 22:31:41,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 401 states, 283 states have (on average 1.0671378091872792) internal successors, (302), 290 states have internal predecessors, (302), 104 states have call successors, (104), 14 states have call predecessors, (104), 13 states have return successors, (103), 96 states have call predecessors, (103), 103 states have call successors, (103) [2022-03-19 22:31:41,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 401 states to 401 states and 509 transitions. [2022-03-19 22:31:41,668 INFO L78 Accepts]: Start accepts. Automaton has 401 states and 509 transitions. Word has length 159 [2022-03-19 22:31:41,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 22:31:41,668 INFO L478 AbstractCegarLoop]: Abstraction has 401 states and 509 transitions. [2022-03-19 22:31:41,668 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 126 states, 125 states have (on average 1.512) internal successors, (189), 123 states have internal predecessors, (189), 56 states have call successors, (59), 4 states have call predecessors, (59), 1 states have return successors, (55), 55 states have call predecessors, (55), 55 states have call successors, (55) [2022-03-19 22:31:41,668 INFO L276 IsEmpty]: Start isEmpty. Operand 401 states and 509 transitions. [2022-03-19 22:31:41,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2022-03-19 22:31:41,669 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 22:31:41,669 INFO L499 BasicCegarLoop]: trace histogram [20, 19, 19, 19, 18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 22:31:41,686 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2022-03-19 22:31:41,886 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2022-03-19 22:31:41,886 INFO L403 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 22:31:41,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 22:31:41,887 INFO L85 PathProgramCache]: Analyzing trace with hash -153733870, now seen corresponding path program 22 times [2022-03-19 22:31:41,887 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 22:31:41,887 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [142763369] [2022-03-19 22:31:41,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 22:31:41,887 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 22:31:41,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:31:42,402 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 22:31:42,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:31:42,404 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2022-03-19 22:31:42,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:31:42,406 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2022-03-19 22:31:42,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:31:42,407 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2022-03-19 22:31:42,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:31:42,409 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2022-03-19 22:31:42,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:31:42,410 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2022-03-19 22:31:42,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:31:42,411 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2022-03-19 22:31:42,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:31:42,413 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2022-03-19 22:31:42,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:31:42,414 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2022-03-19 22:31:42,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:31:42,415 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2022-03-19 22:31:42,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:31:42,419 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2022-03-19 22:31:42,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:31:42,421 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2022-03-19 22:31:42,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:31:42,422 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 107 [2022-03-19 22:31:42,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:31:42,428 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2022-03-19 22:31:42,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:31:42,429 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 121 [2022-03-19 22:31:42,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:31:42,430 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 128 [2022-03-19 22:31:42,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:31:42,431 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 135 [2022-03-19 22:31:42,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:31:42,432 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 142 [2022-03-19 22:31:42,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:31:42,443 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 149 [2022-03-19 22:31:42,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:31:42,445 INFO L134 CoverageAnalysis]: Checked inductivity of 1353 backedges. 207 proven. 534 refuted. 0 times theorem prover too weak. 612 trivial. 0 not checked. [2022-03-19 22:31:42,445 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 22:31:42,446 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [142763369] [2022-03-19 22:31:42,446 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [142763369] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 22:31:42,446 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1172498678] [2022-03-19 22:31:42,446 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 22:31:42,446 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 22:31:42,446 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 22:31:42,447 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 22:31:42,450 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-03-19 22:31:42,527 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 22:31:42,527 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 22:31:42,529 INFO L263 TraceCheckSpWp]: Trace formula consists of 409 conjuncts, 63 conjunts are in the unsatisfiable core [2022-03-19 22:31:42,531 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 22:31:43,342 INFO L134 CoverageAnalysis]: Checked inductivity of 1353 backedges. 36 proven. 705 refuted. 0 times theorem prover too weak. 612 trivial. 0 not checked. [2022-03-19 22:31:43,343 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 22:31:44,168 INFO L134 CoverageAnalysis]: Checked inductivity of 1353 backedges. 36 proven. 705 refuted. 0 times theorem prover too weak. 612 trivial. 0 not checked. [2022-03-19 22:31:44,168 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1172498678] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 22:31:44,168 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 22:31:44,168 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 43, 43] total 86 [2022-03-19 22:31:44,168 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [819948702] [2022-03-19 22:31:44,168 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-19 22:31:44,169 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 86 states [2022-03-19 22:31:44,169 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 22:31:44,169 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2022-03-19 22:31:44,170 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1124, Invalid=6186, Unknown=0, NotChecked=0, Total=7310 [2022-03-19 22:31:44,170 INFO L87 Difference]: Start difference. First operand 401 states and 509 transitions. Second operand has 86 states, 86 states have (on average 1.3255813953488371) internal successors, (114), 83 states have internal predecessors, (114), 20 states have call successors, (23), 4 states have call predecessors, (23), 1 states have return successors, (19), 19 states have call predecessors, (19), 19 states have call successors, (19) [2022-03-19 22:31:45,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 22:31:45,536 INFO L93 Difference]: Finished difference Result 417 states and 527 transitions. [2022-03-19 22:31:45,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-03-19 22:31:45,536 INFO L78 Accepts]: Start accepts. Automaton has has 86 states, 86 states have (on average 1.3255813953488371) internal successors, (114), 83 states have internal predecessors, (114), 20 states have call successors, (23), 4 states have call predecessors, (23), 1 states have return successors, (19), 19 states have call predecessors, (19), 19 states have call successors, (19) Word has length 160 [2022-03-19 22:31:45,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 22:31:45,554 INFO L225 Difference]: With dead ends: 417 [2022-03-19 22:31:45,554 INFO L226 Difference]: Without dead ends: 415 [2022-03-19 22:31:45,555 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 444 GetRequests, 314 SyntacticMatches, 3 SemanticMatches, 127 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4638 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=2825, Invalid=13687, Unknown=0, NotChecked=0, Total=16512 [2022-03-19 22:31:45,556 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 148 mSDsluCounter, 142 mSDsCounter, 0 mSdLazyCounter, 1519 mSolverCounterSat, 350 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 149 SdHoareTripleChecker+Valid, 154 SdHoareTripleChecker+Invalid, 1869 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 350 IncrementalHoareTripleChecker+Valid, 1519 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-19 22:31:45,557 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [149 Valid, 154 Invalid, 1869 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [350 Valid, 1519 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-19 22:31:45,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 415 states. [2022-03-19 22:31:45,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 415 to 411. [2022-03-19 22:31:45,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 411 states, 290 states have (on average 1.0655172413793104) internal successors, (309), 297 states have internal predecessors, (309), 106 states have call successors, (106), 15 states have call predecessors, (106), 14 states have return successors, (105), 98 states have call predecessors, (105), 105 states have call successors, (105) [2022-03-19 22:31:45,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 411 states to 411 states and 520 transitions. [2022-03-19 22:31:45,674 INFO L78 Accepts]: Start accepts. Automaton has 411 states and 520 transitions. Word has length 160 [2022-03-19 22:31:45,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 22:31:45,674 INFO L478 AbstractCegarLoop]: Abstraction has 411 states and 520 transitions. [2022-03-19 22:31:45,675 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 86 states, 86 states have (on average 1.3255813953488371) internal successors, (114), 83 states have internal predecessors, (114), 20 states have call successors, (23), 4 states have call predecessors, (23), 1 states have return successors, (19), 19 states have call predecessors, (19), 19 states have call successors, (19) [2022-03-19 22:31:45,675 INFO L276 IsEmpty]: Start isEmpty. Operand 411 states and 520 transitions. [2022-03-19 22:31:45,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2022-03-19 22:31:45,676 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 22:31:45,676 INFO L499 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 22:31:45,716 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2022-03-19 22:31:45,889 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2022-03-19 22:31:45,890 INFO L403 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 22:31:45,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 22:31:45,890 INFO L85 PathProgramCache]: Analyzing trace with hash -1805571803, now seen corresponding path program 23 times [2022-03-19 22:31:45,890 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 22:31:45,890 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [123059673] [2022-03-19 22:31:45,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 22:31:45,890 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 22:31:45,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:31:46,893 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 22:31:46,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:31:46,920 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2022-03-19 22:31:46,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:31:46,922 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2022-03-19 22:31:46,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:31:46,924 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2022-03-19 22:31:46,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:31:46,926 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2022-03-19 22:31:46,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:31:46,928 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2022-03-19 22:31:46,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:31:46,929 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2022-03-19 22:31:46,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:31:46,931 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2022-03-19 22:31:46,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:31:46,933 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2022-03-19 22:31:46,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:31:46,934 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2022-03-19 22:31:46,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:31:46,936 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2022-03-19 22:31:46,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:31:46,938 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2022-03-19 22:31:46,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:31:46,940 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 107 [2022-03-19 22:31:46,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:31:46,942 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2022-03-19 22:31:46,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:31:46,946 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 121 [2022-03-19 22:31:46,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:31:46,950 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 128 [2022-03-19 22:31:46,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:31:46,953 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 135 [2022-03-19 22:31:46,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:31:46,955 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 142 [2022-03-19 22:31:46,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:31:46,957 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 149 [2022-03-19 22:31:46,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:31:46,958 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 156 [2022-03-19 22:31:46,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:31:46,961 INFO L134 CoverageAnalysis]: Checked inductivity of 1483 backedges. 515 proven. 284 refuted. 0 times theorem prover too weak. 684 trivial. 0 not checked. [2022-03-19 22:31:46,961 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 22:31:46,962 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [123059673] [2022-03-19 22:31:46,962 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [123059673] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 22:31:46,962 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [883826767] [2022-03-19 22:31:46,962 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-19 22:31:46,962 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 22:31:46,962 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 22:31:46,963 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 22:31:46,986 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-03-19 22:31:47,059 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 20 check-sat command(s) [2022-03-19 22:31:47,059 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 22:31:47,061 INFO L263 TraceCheckSpWp]: Trace formula consists of 423 conjuncts, 85 conjunts are in the unsatisfiable core [2022-03-19 22:31:47,063 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 22:31:48,238 INFO L134 CoverageAnalysis]: Checked inductivity of 1483 backedges. 38 proven. 761 refuted. 0 times theorem prover too weak. 684 trivial. 0 not checked. [2022-03-19 22:31:48,238 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 22:31:51,315 INFO L134 CoverageAnalysis]: Checked inductivity of 1483 backedges. 38 proven. 761 refuted. 0 times theorem prover too weak. 684 trivial. 0 not checked. [2022-03-19 22:31:51,315 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [883826767] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 22:31:51,315 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 22:31:51,315 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 46, 46] total 112 [2022-03-19 22:31:51,315 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1458111644] [2022-03-19 22:31:51,316 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-19 22:31:51,316 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 112 states [2022-03-19 22:31:51,316 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 22:31:51,317 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 112 interpolants. [2022-03-19 22:31:51,318 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1705, Invalid=10727, Unknown=0, NotChecked=0, Total=12432 [2022-03-19 22:31:51,318 INFO L87 Difference]: Start difference. First operand 411 states and 520 transitions. Second operand has 112 states, 111 states have (on average 1.6036036036036037) internal successors, (178), 109 states have internal predecessors, (178), 59 states have call successors, (62), 4 states have call predecessors, (62), 1 states have return successors, (58), 58 states have call predecessors, (58), 58 states have call successors, (58) [2022-03-19 22:31:59,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 22:31:59,587 INFO L93 Difference]: Finished difference Result 560 states and 694 transitions. [2022-03-19 22:31:59,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2022-03-19 22:31:59,588 INFO L78 Accepts]: Start accepts. Automaton has has 112 states, 111 states have (on average 1.6036036036036037) internal successors, (178), 109 states have internal predecessors, (178), 59 states have call successors, (62), 4 states have call predecessors, (62), 1 states have return successors, (58), 58 states have call predecessors, (58), 58 states have call successors, (58) Word has length 167 [2022-03-19 22:31:59,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 22:31:59,589 INFO L225 Difference]: With dead ends: 560 [2022-03-19 22:31:59,589 INFO L226 Difference]: Without dead ends: 450 [2022-03-19 22:31:59,591 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 513 GetRequests, 307 SyntacticMatches, 4 SemanticMatches, 202 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10829 ImplicationChecksByTransitivity, 9.6s TimeCoverageRelationStatistics Valid=5271, Invalid=36141, Unknown=0, NotChecked=0, Total=41412 [2022-03-19 22:31:59,592 INFO L913 BasicCegarLoop]: 31 mSDtfsCounter, 509 mSDsluCounter, 262 mSDsCounter, 0 mSdLazyCounter, 6677 mSolverCounterSat, 749 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 510 SdHoareTripleChecker+Valid, 293 SdHoareTripleChecker+Invalid, 7426 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 749 IncrementalHoareTripleChecker+Valid, 6677 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2022-03-19 22:31:59,592 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [510 Valid, 293 Invalid, 7426 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [749 Valid, 6677 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2022-03-19 22:31:59,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 450 states. [2022-03-19 22:31:59,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 450 to 448. [2022-03-19 22:31:59,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 448 states, 316 states have (on average 1.0696202531645569) internal successors, (338), 324 states have internal predecessors, (338), 117 states have call successors, (117), 15 states have call predecessors, (117), 14 states have return successors, (116), 108 states have call predecessors, (116), 116 states have call successors, (116) [2022-03-19 22:31:59,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 448 states to 448 states and 571 transitions. [2022-03-19 22:31:59,753 INFO L78 Accepts]: Start accepts. Automaton has 448 states and 571 transitions. Word has length 167 [2022-03-19 22:31:59,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 22:31:59,753 INFO L478 AbstractCegarLoop]: Abstraction has 448 states and 571 transitions. [2022-03-19 22:31:59,753 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 112 states, 111 states have (on average 1.6036036036036037) internal successors, (178), 109 states have internal predecessors, (178), 59 states have call successors, (62), 4 states have call predecessors, (62), 1 states have return successors, (58), 58 states have call predecessors, (58), 58 states have call successors, (58) [2022-03-19 22:31:59,753 INFO L276 IsEmpty]: Start isEmpty. Operand 448 states and 571 transitions. [2022-03-19 22:31:59,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2022-03-19 22:31:59,758 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 22:31:59,758 INFO L499 BasicCegarLoop]: trace histogram [21, 21, 21, 21, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 22:31:59,787 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2022-03-19 22:31:59,975 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2022-03-19 22:31:59,975 INFO L403 AbstractCegarLoop]: === Iteration 28 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 22:31:59,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 22:31:59,975 INFO L85 PathProgramCache]: Analyzing trace with hash 1539955814, now seen corresponding path program 24 times [2022-03-19 22:31:59,975 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 22:31:59,976 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1785178379] [2022-03-19 22:31:59,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 22:31:59,976 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 22:31:59,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:32:01,444 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 22:32:01,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:32:01,446 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-03-19 22:32:01,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:32:01,459 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-03-19 22:32:01,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:32:01,464 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2022-03-19 22:32:01,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:32:01,466 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2022-03-19 22:32:01,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:32:01,467 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2022-03-19 22:32:01,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:32:01,469 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2022-03-19 22:32:01,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:32:01,470 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2022-03-19 22:32:01,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:32:01,472 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2022-03-19 22:32:01,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:32:01,477 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2022-03-19 22:32:01,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:32:01,478 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2022-03-19 22:32:01,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:32:01,480 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2022-03-19 22:32:01,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:32:01,485 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 108 [2022-03-19 22:32:01,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:32:01,499 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 115 [2022-03-19 22:32:01,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:32:01,501 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 122 [2022-03-19 22:32:01,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:32:01,502 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 129 [2022-03-19 22:32:01,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:32:01,504 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 136 [2022-03-19 22:32:01,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:32:01,505 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 143 [2022-03-19 22:32:01,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:32:01,508 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 150 [2022-03-19 22:32:01,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:32:01,509 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 157 [2022-03-19 22:32:01,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:32:01,511 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 164 [2022-03-19 22:32:01,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:32:01,513 INFO L134 CoverageAnalysis]: Checked inductivity of 1641 backedges. 572 proven. 309 refuted. 0 times theorem prover too weak. 760 trivial. 0 not checked. [2022-03-19 22:32:01,514 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 22:32:01,514 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1785178379] [2022-03-19 22:32:01,514 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1785178379] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 22:32:01,514 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [598889417] [2022-03-19 22:32:01,514 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-19 22:32:01,514 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 22:32:01,514 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 22:32:01,521 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 22:32:01,522 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-03-19 22:32:01,602 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 21 check-sat command(s) [2022-03-19 22:32:01,602 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 22:32:01,604 INFO L263 TraceCheckSpWp]: Trace formula consists of 442 conjuncts, 69 conjunts are in the unsatisfiable core [2022-03-19 22:32:01,606 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 22:32:03,317 INFO L134 CoverageAnalysis]: Checked inductivity of 1641 backedges. 40 proven. 841 refuted. 0 times theorem prover too weak. 760 trivial. 0 not checked. [2022-03-19 22:32:03,318 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 22:32:06,062 INFO L134 CoverageAnalysis]: Checked inductivity of 1641 backedges. 40 proven. 841 refuted. 0 times theorem prover too weak. 760 trivial. 0 not checked. [2022-03-19 22:32:06,062 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [598889417] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 22:32:06,062 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 22:32:06,062 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 48, 48] total 138 [2022-03-19 22:32:06,062 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [346726307] [2022-03-19 22:32:06,063 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-19 22:32:06,063 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 138 states [2022-03-19 22:32:06,063 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 22:32:06,064 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 138 interpolants. [2022-03-19 22:32:06,065 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2117, Invalid=16789, Unknown=0, NotChecked=0, Total=18906 [2022-03-19 22:32:06,065 INFO L87 Difference]: Start difference. First operand 448 states and 571 transitions. Second operand has 138 states, 137 states have (on average 1.510948905109489) internal successors, (207), 135 states have internal predecessors, (207), 62 states have call successors, (65), 4 states have call predecessors, (65), 1 states have return successors, (61), 61 states have call predecessors, (61), 61 states have call successors, (61) [2022-03-19 22:32:14,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 22:32:14,934 INFO L93 Difference]: Finished difference Result 566 states and 699 transitions. [2022-03-19 22:32:14,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2022-03-19 22:32:14,934 INFO L78 Accepts]: Start accepts. Automaton has has 138 states, 137 states have (on average 1.510948905109489) internal successors, (207), 135 states have internal predecessors, (207), 62 states have call successors, (65), 4 states have call predecessors, (65), 1 states have return successors, (61), 61 states have call predecessors, (61), 61 states have call successors, (61) Word has length 175 [2022-03-19 22:32:14,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 22:32:14,936 INFO L225 Difference]: With dead ends: 566 [2022-03-19 22:32:14,936 INFO L226 Difference]: Without dead ends: 449 [2022-03-19 22:32:14,939 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 513 GetRequests, 302 SyntacticMatches, 3 SemanticMatches, 208 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11279 ImplicationChecksByTransitivity, 12.0s TimeCoverageRelationStatistics Valid=4620, Invalid=39270, Unknown=0, NotChecked=0, Total=43890 [2022-03-19 22:32:14,941 INFO L913 BasicCegarLoop]: 32 mSDtfsCounter, 124 mSDsluCounter, 182 mSDsCounter, 0 mSdLazyCounter, 3613 mSolverCounterSat, 394 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 125 SdHoareTripleChecker+Valid, 214 SdHoareTripleChecker+Invalid, 4007 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 394 IncrementalHoareTripleChecker+Valid, 3613 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-03-19 22:32:14,941 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [125 Valid, 214 Invalid, 4007 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [394 Valid, 3613 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-03-19 22:32:14,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 449 states. [2022-03-19 22:32:15,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 449 to 448. [2022-03-19 22:32:15,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 448 states, 316 states have (on average 1.0664556962025316) internal successors, (337), 324 states have internal predecessors, (337), 117 states have call successors, (117), 15 states have call predecessors, (117), 14 states have return successors, (116), 108 states have call predecessors, (116), 116 states have call successors, (116) [2022-03-19 22:32:15,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 448 states to 448 states and 570 transitions. [2022-03-19 22:32:15,082 INFO L78 Accepts]: Start accepts. Automaton has 448 states and 570 transitions. Word has length 175 [2022-03-19 22:32:15,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 22:32:15,082 INFO L478 AbstractCegarLoop]: Abstraction has 448 states and 570 transitions. [2022-03-19 22:32:15,083 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 138 states, 137 states have (on average 1.510948905109489) internal successors, (207), 135 states have internal predecessors, (207), 62 states have call successors, (65), 4 states have call predecessors, (65), 1 states have return successors, (61), 61 states have call predecessors, (61), 61 states have call successors, (61) [2022-03-19 22:32:15,083 INFO L276 IsEmpty]: Start isEmpty. Operand 448 states and 570 transitions. [2022-03-19 22:32:15,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2022-03-19 22:32:15,085 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 22:32:15,085 INFO L499 BasicCegarLoop]: trace histogram [22, 21, 21, 21, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 22:32:15,108 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2022-03-19 22:32:15,308 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2022-03-19 22:32:15,309 INFO L403 AbstractCegarLoop]: === Iteration 29 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 22:32:15,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 22:32:15,309 INFO L85 PathProgramCache]: Analyzing trace with hash -754163662, now seen corresponding path program 25 times [2022-03-19 22:32:15,309 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 22:32:15,309 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1663847270] [2022-03-19 22:32:15,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 22:32:15,309 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 22:32:15,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:32:15,810 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 22:32:15,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:32:15,819 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2022-03-19 22:32:15,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:32:15,822 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-03-19 22:32:15,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:32:15,823 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2022-03-19 22:32:15,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:32:15,828 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2022-03-19 22:32:15,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:32:15,829 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2022-03-19 22:32:15,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:32:15,830 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2022-03-19 22:32:15,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:32:15,831 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2022-03-19 22:32:15,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:32:15,832 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2022-03-19 22:32:15,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:32:15,839 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2022-03-19 22:32:15,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:32:15,841 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2022-03-19 22:32:15,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:32:15,842 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 102 [2022-03-19 22:32:15,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:32:15,843 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 109 [2022-03-19 22:32:15,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:32:15,849 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 116 [2022-03-19 22:32:15,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:32:15,850 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 123 [2022-03-19 22:32:15,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:32:15,852 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 130 [2022-03-19 22:32:15,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:32:15,853 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 137 [2022-03-19 22:32:15,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:32:15,867 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 144 [2022-03-19 22:32:15,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:32:15,869 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 151 [2022-03-19 22:32:15,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:32:15,870 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 158 [2022-03-19 22:32:15,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:32:15,871 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 165 [2022-03-19 22:32:15,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:32:15,872 INFO L134 CoverageAnalysis]: Checked inductivity of 1663 backedges. 250 proven. 653 refuted. 0 times theorem prover too weak. 760 trivial. 0 not checked. [2022-03-19 22:32:15,872 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 22:32:15,872 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1663847270] [2022-03-19 22:32:15,872 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1663847270] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 22:32:15,873 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [479842902] [2022-03-19 22:32:15,873 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-19 22:32:15,873 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 22:32:15,873 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 22:32:15,874 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 22:32:15,875 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-03-19 22:32:15,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:32:15,955 INFO L263 TraceCheckSpWp]: Trace formula consists of 447 conjuncts, 69 conjunts are in the unsatisfiable core [2022-03-19 22:32:15,962 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 22:32:16,553 INFO L134 CoverageAnalysis]: Checked inductivity of 1663 backedges. 40 proven. 863 refuted. 0 times theorem prover too weak. 760 trivial. 0 not checked. [2022-03-19 22:32:16,553 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 22:32:17,190 INFO L134 CoverageAnalysis]: Checked inductivity of 1663 backedges. 40 proven. 863 refuted. 0 times theorem prover too weak. 760 trivial. 0 not checked. [2022-03-19 22:32:17,190 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [479842902] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 22:32:17,190 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 22:32:17,190 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 47, 47] total 94 [2022-03-19 22:32:17,191 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [39274974] [2022-03-19 22:32:17,191 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-19 22:32:17,191 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 94 states [2022-03-19 22:32:17,191 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 22:32:17,192 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 94 interpolants. [2022-03-19 22:32:17,193 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1345, Invalid=7397, Unknown=0, NotChecked=0, Total=8742 [2022-03-19 22:32:17,193 INFO L87 Difference]: Start difference. First operand 448 states and 570 transitions. Second operand has 94 states, 94 states have (on average 1.3191489361702127) internal successors, (124), 91 states have internal predecessors, (124), 22 states have call successors, (25), 4 states have call predecessors, (25), 1 states have return successors, (21), 21 states have call predecessors, (21), 21 states have call successors, (21) [2022-03-19 22:32:18,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 22:32:18,845 INFO L93 Difference]: Finished difference Result 464 states and 588 transitions. [2022-03-19 22:32:18,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-03-19 22:32:18,871 INFO L78 Accepts]: Start accepts. Automaton has has 94 states, 94 states have (on average 1.3191489361702127) internal successors, (124), 91 states have internal predecessors, (124), 22 states have call successors, (25), 4 states have call predecessors, (25), 1 states have return successors, (21), 21 states have call predecessors, (21), 21 states have call successors, (21) Word has length 176 [2022-03-19 22:32:18,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 22:32:18,873 INFO L225 Difference]: With dead ends: 464 [2022-03-19 22:32:18,873 INFO L226 Difference]: Without dead ends: 462 [2022-03-19 22:32:18,874 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 488 GetRequests, 346 SyntacticMatches, 3 SemanticMatches, 139 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5567 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=3390, Invalid=16350, Unknown=0, NotChecked=0, Total=19740 [2022-03-19 22:32:18,874 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 158 mSDsluCounter, 152 mSDsCounter, 0 mSdLazyCounter, 1875 mSolverCounterSat, 380 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 159 SdHoareTripleChecker+Valid, 164 SdHoareTripleChecker+Invalid, 2255 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 380 IncrementalHoareTripleChecker+Valid, 1875 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-19 22:32:18,875 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [159 Valid, 164 Invalid, 2255 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [380 Valid, 1875 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-19 22:32:18,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 462 states. [2022-03-19 22:32:18,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 462 to 458. [2022-03-19 22:32:18,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 458 states, 323 states have (on average 1.065015479876161) internal successors, (344), 331 states have internal predecessors, (344), 119 states have call successors, (119), 16 states have call predecessors, (119), 15 states have return successors, (118), 110 states have call predecessors, (118), 118 states have call successors, (118) [2022-03-19 22:32:18,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 458 states to 458 states and 581 transitions. [2022-03-19 22:32:18,995 INFO L78 Accepts]: Start accepts. Automaton has 458 states and 581 transitions. Word has length 176 [2022-03-19 22:32:18,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 22:32:18,995 INFO L478 AbstractCegarLoop]: Abstraction has 458 states and 581 transitions. [2022-03-19 22:32:18,995 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 94 states, 94 states have (on average 1.3191489361702127) internal successors, (124), 91 states have internal predecessors, (124), 22 states have call successors, (25), 4 states have call predecessors, (25), 1 states have return successors, (21), 21 states have call predecessors, (21), 21 states have call successors, (21) [2022-03-19 22:32:18,995 INFO L276 IsEmpty]: Start isEmpty. Operand 458 states and 581 transitions. [2022-03-19 22:32:18,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 184 [2022-03-19 22:32:18,996 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 22:32:18,996 INFO L499 BasicCegarLoop]: trace histogram [22, 22, 22, 22, 21, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 22:32:19,028 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2022-03-19 22:32:19,211 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2022-03-19 22:32:19,212 INFO L403 AbstractCegarLoop]: === Iteration 30 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 22:32:19,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 22:32:19,212 INFO L85 PathProgramCache]: Analyzing trace with hash 2115648005, now seen corresponding path program 26 times [2022-03-19 22:32:19,212 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 22:32:19,212 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1023859621] [2022-03-19 22:32:19,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 22:32:19,212 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 22:32:19,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:32:20,759 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 22:32:20,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:32:20,762 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2022-03-19 22:32:20,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:32:20,763 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-03-19 22:32:20,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:32:20,765 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2022-03-19 22:32:20,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:32:20,767 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2022-03-19 22:32:20,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:32:20,771 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2022-03-19 22:32:20,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:32:20,773 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2022-03-19 22:32:20,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:32:20,775 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2022-03-19 22:32:20,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:32:20,777 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2022-03-19 22:32:20,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:32:20,778 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2022-03-19 22:32:20,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:32:20,780 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2022-03-19 22:32:20,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:32:20,782 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 102 [2022-03-19 22:32:20,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:32:20,784 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 109 [2022-03-19 22:32:20,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:32:20,786 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 116 [2022-03-19 22:32:20,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:32:20,787 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 123 [2022-03-19 22:32:20,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:32:20,789 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 130 [2022-03-19 22:32:20,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:32:20,791 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 137 [2022-03-19 22:32:20,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:32:20,793 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 144 [2022-03-19 22:32:20,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:32:20,794 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 151 [2022-03-19 22:32:20,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:32:20,796 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 158 [2022-03-19 22:32:20,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:32:20,798 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 165 [2022-03-19 22:32:20,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:32:20,799 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 172 [2022-03-19 22:32:20,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:32:20,806 INFO L134 CoverageAnalysis]: Checked inductivity of 1807 backedges. 632 proven. 335 refuted. 0 times theorem prover too weak. 840 trivial. 0 not checked. [2022-03-19 22:32:20,806 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 22:32:20,806 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1023859621] [2022-03-19 22:32:20,806 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1023859621] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 22:32:20,806 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1888103692] [2022-03-19 22:32:20,806 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 22:32:20,806 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 22:32:20,806 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 22:32:20,807 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 22:32:20,808 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-03-19 22:32:20,874 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 22:32:20,874 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 22:32:20,878 INFO L263 TraceCheckSpWp]: Trace formula consists of 461 conjuncts, 136 conjunts are in the unsatisfiable core [2022-03-19 22:32:20,881 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 22:32:23,664 INFO L134 CoverageAnalysis]: Checked inductivity of 1807 backedges. 42 proven. 925 refuted. 0 times theorem prover too weak. 840 trivial. 0 not checked. [2022-03-19 22:32:23,664 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 22:32:27,754 INFO L134 CoverageAnalysis]: Checked inductivity of 1807 backedges. 42 proven. 925 refuted. 0 times theorem prover too weak. 840 trivial. 0 not checked. [2022-03-19 22:32:27,754 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1888103692] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 22:32:27,754 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 22:32:27,755 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 50, 50] total 144 [2022-03-19 22:32:27,755 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1703962765] [2022-03-19 22:32:27,755 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-19 22:32:27,755 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 144 states [2022-03-19 22:32:27,755 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 22:32:27,756 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 144 interpolants. [2022-03-19 22:32:27,757 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2597, Invalid=17995, Unknown=0, NotChecked=0, Total=20592 [2022-03-19 22:32:27,757 INFO L87 Difference]: Start difference. First operand 458 states and 581 transitions. Second operand has 144 states, 143 states have (on average 1.5104895104895104) internal successors, (216), 141 states have internal predecessors, (216), 65 states have call successors, (68), 4 states have call predecessors, (68), 1 states have return successors, (64), 64 states have call predecessors, (64), 64 states have call successors, (64) [2022-03-19 22:32:39,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 22:32:39,660 INFO L93 Difference]: Finished difference Result 654 states and 813 transitions. [2022-03-19 22:32:39,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 103 states. [2022-03-19 22:32:39,660 INFO L78 Accepts]: Start accepts. Automaton has has 144 states, 143 states have (on average 1.5104895104895104) internal successors, (216), 141 states have internal predecessors, (216), 65 states have call successors, (68), 4 states have call predecessors, (68), 1 states have return successors, (64), 64 states have call predecessors, (64), 64 states have call successors, (64) Word has length 183 [2022-03-19 22:32:39,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 22:32:39,686 INFO L225 Difference]: With dead ends: 654 [2022-03-19 22:32:39,686 INFO L226 Difference]: Without dead ends: 534 [2022-03-19 22:32:39,689 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 561 GetRequests, 316 SyntacticMatches, 3 SemanticMatches, 242 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17632 ImplicationChecksByTransitivity, 15.2s TimeCoverageRelationStatistics Valid=6821, Invalid=52471, Unknown=0, NotChecked=0, Total=59292 [2022-03-19 22:32:39,690 INFO L913 BasicCegarLoop]: 33 mSDtfsCounter, 571 mSDsluCounter, 242 mSDsCounter, 0 mSdLazyCounter, 7523 mSolverCounterSat, 865 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 572 SdHoareTripleChecker+Valid, 275 SdHoareTripleChecker+Invalid, 8388 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 865 IncrementalHoareTripleChecker+Valid, 7523 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2022-03-19 22:32:39,690 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [572 Valid, 275 Invalid, 8388 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [865 Valid, 7523 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2022-03-19 22:32:39,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 534 states. [2022-03-19 22:32:39,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 534 to 532. [2022-03-19 22:32:39,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 532 states, 374 states have (on average 1.0641711229946524) internal successors, (398), 383 states have internal predecessors, (398), 141 states have call successors, (141), 17 states have call predecessors, (141), 16 states have return successors, (140), 131 states have call predecessors, (140), 140 states have call successors, (140) [2022-03-19 22:32:39,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 532 states to 532 states and 679 transitions. [2022-03-19 22:32:39,874 INFO L78 Accepts]: Start accepts. Automaton has 532 states and 679 transitions. Word has length 183 [2022-03-19 22:32:39,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 22:32:39,874 INFO L478 AbstractCegarLoop]: Abstraction has 532 states and 679 transitions. [2022-03-19 22:32:39,874 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 144 states, 143 states have (on average 1.5104895104895104) internal successors, (216), 141 states have internal predecessors, (216), 65 states have call successors, (68), 4 states have call predecessors, (68), 1 states have return successors, (64), 64 states have call predecessors, (64), 64 states have call successors, (64) [2022-03-19 22:32:39,874 INFO L276 IsEmpty]: Start isEmpty. Operand 532 states and 679 transitions. [2022-03-19 22:32:39,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 192 [2022-03-19 22:32:39,876 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 22:32:39,876 INFO L499 BasicCegarLoop]: trace histogram [23, 23, 23, 23, 22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 22:32:39,908 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2022-03-19 22:32:40,093 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 22:32:40,093 INFO L403 AbstractCegarLoop]: === Iteration 31 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 22:32:40,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 22:32:40,093 INFO L85 PathProgramCache]: Analyzing trace with hash 2035427206, now seen corresponding path program 27 times [2022-03-19 22:32:40,094 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 22:32:40,094 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1964482834] [2022-03-19 22:32:40,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 22:32:40,094 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 22:32:40,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:32:41,324 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 22:32:41,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:32:41,326 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-03-19 22:32:41,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:32:41,331 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2022-03-19 22:32:41,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:32:41,332 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-03-19 22:32:41,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:32:41,334 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2022-03-19 22:32:41,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:32:41,337 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2022-03-19 22:32:41,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:32:41,348 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2022-03-19 22:32:41,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:32:41,349 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2022-03-19 22:32:41,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:32:41,351 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2022-03-19 22:32:41,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:32:41,353 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2022-03-19 22:32:41,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:32:41,354 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2022-03-19 22:32:41,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:32:41,356 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2022-03-19 22:32:41,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:32:41,357 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 110 [2022-03-19 22:32:41,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:32:41,359 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 117 [2022-03-19 22:32:41,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:32:41,360 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 124 [2022-03-19 22:32:41,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:32:41,362 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 131 [2022-03-19 22:32:41,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:32:41,364 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 138 [2022-03-19 22:32:41,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:32:41,365 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 145 [2022-03-19 22:32:41,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:32:41,367 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 152 [2022-03-19 22:32:41,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:32:41,368 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 159 [2022-03-19 22:32:41,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:32:41,370 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 166 [2022-03-19 22:32:41,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:32:41,371 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 173 [2022-03-19 22:32:41,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:32:41,373 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 180 [2022-03-19 22:32:41,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:32:41,375 INFO L134 CoverageAnalysis]: Checked inductivity of 1981 backedges. 695 proven. 362 refuted. 0 times theorem prover too weak. 924 trivial. 0 not checked. [2022-03-19 22:32:41,375 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 22:32:41,375 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1964482834] [2022-03-19 22:32:41,375 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1964482834] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 22:32:41,375 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [42865108] [2022-03-19 22:32:41,375 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-19 22:32:41,375 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 22:32:41,376 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 22:32:41,376 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 22:32:41,377 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2022-03-19 22:32:41,494 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 23 check-sat command(s) [2022-03-19 22:32:41,494 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 22:32:41,496 INFO L263 TraceCheckSpWp]: Trace formula consists of 480 conjuncts, 75 conjunts are in the unsatisfiable core [2022-03-19 22:32:41,499 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 22:32:44,455 INFO L134 CoverageAnalysis]: Checked inductivity of 1981 backedges. 44 proven. 1013 refuted. 0 times theorem prover too weak. 924 trivial. 0 not checked. [2022-03-19 22:32:44,455 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 22:32:48,706 INFO L134 CoverageAnalysis]: Checked inductivity of 1981 backedges. 44 proven. 1013 refuted. 0 times theorem prover too weak. 924 trivial. 0 not checked. [2022-03-19 22:32:48,707 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [42865108] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 22:32:48,707 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 22:32:48,707 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 52, 52] total 150 [2022-03-19 22:32:48,707 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1374480039] [2022-03-19 22:32:48,707 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-19 22:32:48,708 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 150 states [2022-03-19 22:32:48,708 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 22:32:48,708 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 150 interpolants. [2022-03-19 22:32:48,710 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2499, Invalid=19851, Unknown=0, NotChecked=0, Total=22350 [2022-03-19 22:32:48,710 INFO L87 Difference]: Start difference. First operand 532 states and 679 transitions. Second operand has 150 states, 149 states have (on average 1.5100671140939597) internal successors, (225), 147 states have internal predecessors, (225), 68 states have call successors, (71), 4 states have call predecessors, (71), 1 states have return successors, (67), 67 states have call predecessors, (67), 67 states have call successors, (67) [2022-03-19 22:32:59,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 22:32:59,171 INFO L93 Difference]: Finished difference Result 660 states and 816 transitions. [2022-03-19 22:32:59,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2022-03-19 22:32:59,172 INFO L78 Accepts]: Start accepts. Automaton has has 150 states, 149 states have (on average 1.5100671140939597) internal successors, (225), 147 states have internal predecessors, (225), 68 states have call successors, (71), 4 states have call predecessors, (71), 1 states have return successors, (67), 67 states have call predecessors, (67), 67 states have call successors, (67) Word has length 191 [2022-03-19 22:32:59,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 22:32:59,174 INFO L225 Difference]: With dead ends: 660 [2022-03-19 22:32:59,174 INFO L226 Difference]: Without dead ends: 529 [2022-03-19 22:32:59,177 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 559 GetRequests, 330 SyntacticMatches, 3 SemanticMatches, 226 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13338 ImplicationChecksByTransitivity, 15.4s TimeCoverageRelationStatistics Valid=5441, Invalid=46315, Unknown=0, NotChecked=0, Total=51756 [2022-03-19 22:32:59,177 INFO L913 BasicCegarLoop]: 34 mSDtfsCounter, 127 mSDsluCounter, 197 mSDsCounter, 0 mSdLazyCounter, 4306 mSolverCounterSat, 450 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 128 SdHoareTripleChecker+Valid, 231 SdHoareTripleChecker+Invalid, 4756 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 450 IncrementalHoareTripleChecker+Valid, 4306 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-03-19 22:32:59,177 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [128 Valid, 231 Invalid, 4756 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [450 Valid, 4306 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-03-19 22:32:59,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 529 states. [2022-03-19 22:32:59,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 529 to 529. [2022-03-19 22:32:59,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 529 states, 372 states have (on average 1.0618279569892473) internal successors, (395), 380 states have internal predecessors, (395), 140 states have call successors, (140), 17 states have call predecessors, (140), 16 states have return successors, (139), 131 states have call predecessors, (139), 139 states have call successors, (139) [2022-03-19 22:32:59,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 529 states to 529 states and 674 transitions. [2022-03-19 22:32:59,371 INFO L78 Accepts]: Start accepts. Automaton has 529 states and 674 transitions. Word has length 191 [2022-03-19 22:32:59,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 22:32:59,374 INFO L478 AbstractCegarLoop]: Abstraction has 529 states and 674 transitions. [2022-03-19 22:32:59,375 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 150 states, 149 states have (on average 1.5100671140939597) internal successors, (225), 147 states have internal predecessors, (225), 68 states have call successors, (71), 4 states have call predecessors, (71), 1 states have return successors, (67), 67 states have call predecessors, (67), 67 states have call successors, (67) [2022-03-19 22:32:59,375 INFO L276 IsEmpty]: Start isEmpty. Operand 529 states and 674 transitions. [2022-03-19 22:32:59,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 193 [2022-03-19 22:32:59,376 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 22:32:59,376 INFO L499 BasicCegarLoop]: trace histogram [24, 23, 23, 23, 22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 22:32:59,395 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Ended with exit code 0 [2022-03-19 22:32:59,593 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2022-03-19 22:32:59,594 INFO L403 AbstractCegarLoop]: === Iteration 32 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 22:32:59,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 22:32:59,594 INFO L85 PathProgramCache]: Analyzing trace with hash 1619759954, now seen corresponding path program 28 times [2022-03-19 22:32:59,594 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 22:32:59,594 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [462171848] [2022-03-19 22:32:59,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 22:32:59,594 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 22:32:59,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:33:00,076 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 22:33:00,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:33:00,078 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-03-19 22:33:00,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:33:00,081 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2022-03-19 22:33:00,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:33:00,082 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2022-03-19 22:33:00,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:33:00,088 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-03-19 22:33:00,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:33:00,092 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2022-03-19 22:33:00,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:33:00,093 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2022-03-19 22:33:00,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:33:00,095 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2022-03-19 22:33:00,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:33:00,096 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2022-03-19 22:33:00,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:33:00,098 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2022-03-19 22:33:00,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:33:00,110 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2022-03-19 22:33:00,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:33:00,111 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2022-03-19 22:33:00,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:33:00,113 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2022-03-19 22:33:00,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:33:00,114 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2022-03-19 22:33:00,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:33:00,116 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 125 [2022-03-19 22:33:00,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:33:00,117 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 132 [2022-03-19 22:33:00,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:33:00,119 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 139 [2022-03-19 22:33:00,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:33:00,120 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 146 [2022-03-19 22:33:00,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:33:00,121 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 153 [2022-03-19 22:33:00,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:33:00,123 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 160 [2022-03-19 22:33:00,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:33:00,124 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 167 [2022-03-19 22:33:00,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:33:00,125 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 174 [2022-03-19 22:33:00,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:33:00,127 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 181 [2022-03-19 22:33:00,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:33:00,128 INFO L134 CoverageAnalysis]: Checked inductivity of 2005 backedges. 297 proven. 784 refuted. 0 times theorem prover too weak. 924 trivial. 0 not checked. [2022-03-19 22:33:00,128 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 22:33:00,129 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [462171848] [2022-03-19 22:33:00,129 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [462171848] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 22:33:00,129 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1250185192] [2022-03-19 22:33:00,129 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 22:33:00,129 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 22:33:00,129 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 22:33:00,144 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 22:33:00,145 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2022-03-19 22:33:00,217 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 22:33:00,217 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 22:33:00,220 INFO L263 TraceCheckSpWp]: Trace formula consists of 485 conjuncts, 75 conjunts are in the unsatisfiable core [2022-03-19 22:33:00,223 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 22:33:01,354 INFO L134 CoverageAnalysis]: Checked inductivity of 2005 backedges. 44 proven. 1037 refuted. 0 times theorem prover too weak. 924 trivial. 0 not checked. [2022-03-19 22:33:01,354 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 22:33:02,428 INFO L134 CoverageAnalysis]: Checked inductivity of 2005 backedges. 44 proven. 1037 refuted. 0 times theorem prover too weak. 924 trivial. 0 not checked. [2022-03-19 22:33:02,428 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1250185192] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 22:33:02,428 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 22:33:02,428 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 51, 51] total 102 [2022-03-19 22:33:02,429 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1475339155] [2022-03-19 22:33:02,429 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-19 22:33:02,429 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 102 states [2022-03-19 22:33:02,429 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 22:33:02,430 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 102 interpolants. [2022-03-19 22:33:02,431 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1586, Invalid=8716, Unknown=0, NotChecked=0, Total=10302 [2022-03-19 22:33:02,431 INFO L87 Difference]: Start difference. First operand 529 states and 674 transitions. Second operand has 102 states, 102 states have (on average 1.3137254901960784) internal successors, (134), 99 states have internal predecessors, (134), 24 states have call successors, (27), 4 states have call predecessors, (27), 1 states have return successors, (23), 23 states have call predecessors, (23), 23 states have call successors, (23) [2022-03-19 22:33:04,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 22:33:04,204 INFO L93 Difference]: Finished difference Result 545 states and 692 transitions. [2022-03-19 22:33:04,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2022-03-19 22:33:04,204 INFO L78 Accepts]: Start accepts. Automaton has has 102 states, 102 states have (on average 1.3137254901960784) internal successors, (134), 99 states have internal predecessors, (134), 24 states have call successors, (27), 4 states have call predecessors, (27), 1 states have return successors, (23), 23 states have call predecessors, (23), 23 states have call successors, (23) Word has length 192 [2022-03-19 22:33:04,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 22:33:04,206 INFO L225 Difference]: With dead ends: 545 [2022-03-19 22:33:04,206 INFO L226 Difference]: Without dead ends: 543 [2022-03-19 22:33:04,208 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 532 GetRequests, 378 SyntacticMatches, 3 SemanticMatches, 151 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6580 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=4007, Invalid=19249, Unknown=0, NotChecked=0, Total=23256 [2022-03-19 22:33:04,208 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 206 mSDsluCounter, 172 mSDsCounter, 0 mSdLazyCounter, 2150 mSolverCounterSat, 518 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 207 SdHoareTripleChecker+Valid, 184 SdHoareTripleChecker+Invalid, 2668 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 518 IncrementalHoareTripleChecker+Valid, 2150 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-19 22:33:04,209 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [207 Valid, 184 Invalid, 2668 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [518 Valid, 2150 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-19 22:33:04,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 543 states. [2022-03-19 22:33:04,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 543 to 539. [2022-03-19 22:33:04,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 539 states, 379 states have (on average 1.0606860158311346) internal successors, (402), 387 states have internal predecessors, (402), 142 states have call successors, (142), 18 states have call predecessors, (142), 17 states have return successors, (141), 133 states have call predecessors, (141), 141 states have call successors, (141) [2022-03-19 22:33:04,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 539 states to 539 states and 685 transitions. [2022-03-19 22:33:04,387 INFO L78 Accepts]: Start accepts. Automaton has 539 states and 685 transitions. Word has length 192 [2022-03-19 22:33:04,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 22:33:04,387 INFO L478 AbstractCegarLoop]: Abstraction has 539 states and 685 transitions. [2022-03-19 22:33:04,387 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 102 states, 102 states have (on average 1.3137254901960784) internal successors, (134), 99 states have internal predecessors, (134), 24 states have call successors, (27), 4 states have call predecessors, (27), 1 states have return successors, (23), 23 states have call predecessors, (23), 23 states have call successors, (23) [2022-03-19 22:33:04,387 INFO L276 IsEmpty]: Start isEmpty. Operand 539 states and 685 transitions. [2022-03-19 22:33:04,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 200 [2022-03-19 22:33:04,389 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 22:33:04,389 INFO L499 BasicCegarLoop]: trace histogram [24, 24, 24, 24, 23, 23, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 22:33:04,408 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2022-03-19 22:33:04,594 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 22:33:04,594 INFO L403 AbstractCegarLoop]: === Iteration 33 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 22:33:04,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 22:33:04,594 INFO L85 PathProgramCache]: Analyzing trace with hash 1808876261, now seen corresponding path program 29 times [2022-03-19 22:33:04,594 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 22:33:04,595 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1356151772] [2022-03-19 22:33:04,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 22:33:04,595 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 22:33:04,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:33:06,017 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 22:33:06,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:33:06,019 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-03-19 22:33:06,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:33:06,022 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2022-03-19 22:33:06,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:33:06,024 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2022-03-19 22:33:06,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:33:06,025 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-03-19 22:33:06,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:33:06,048 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2022-03-19 22:33:06,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:33:06,050 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2022-03-19 22:33:06,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:33:06,052 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2022-03-19 22:33:06,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:33:06,054 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2022-03-19 22:33:06,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:33:06,056 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2022-03-19 22:33:06,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:33:06,058 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2022-03-19 22:33:06,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:33:06,059 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2022-03-19 22:33:06,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:33:06,064 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2022-03-19 22:33:06,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:33:06,066 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2022-03-19 22:33:06,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:33:06,068 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 125 [2022-03-19 22:33:06,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:33:06,070 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 132 [2022-03-19 22:33:06,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:33:06,071 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 139 [2022-03-19 22:33:06,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:33:06,073 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 146 [2022-03-19 22:33:06,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:33:06,075 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 153 [2022-03-19 22:33:06,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:33:06,077 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 160 [2022-03-19 22:33:06,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:33:06,078 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 167 [2022-03-19 22:33:06,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:33:06,080 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 174 [2022-03-19 22:33:06,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:33:06,082 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 181 [2022-03-19 22:33:06,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:33:06,084 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 188 [2022-03-19 22:33:06,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:33:06,086 INFO L134 CoverageAnalysis]: Checked inductivity of 2163 backedges. 761 proven. 390 refuted. 0 times theorem prover too weak. 1012 trivial. 0 not checked. [2022-03-19 22:33:06,087 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 22:33:06,087 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1356151772] [2022-03-19 22:33:06,087 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1356151772] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 22:33:06,087 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1606603442] [2022-03-19 22:33:06,087 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-19 22:33:06,087 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 22:33:06,087 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 22:33:06,088 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 22:33:06,089 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2022-03-19 22:33:06,172 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 24 check-sat command(s) [2022-03-19 22:33:06,173 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 22:33:06,175 INFO L263 TraceCheckSpWp]: Trace formula consists of 499 conjuncts, 101 conjunts are in the unsatisfiable core [2022-03-19 22:33:06,178 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 22:33:07,519 INFO L134 CoverageAnalysis]: Checked inductivity of 2163 backedges. 46 proven. 1105 refuted. 0 times theorem prover too weak. 1012 trivial. 0 not checked. [2022-03-19 22:33:07,523 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 22:33:11,475 INFO L134 CoverageAnalysis]: Checked inductivity of 2163 backedges. 46 proven. 1105 refuted. 0 times theorem prover too weak. 1012 trivial. 0 not checked. [2022-03-19 22:33:11,475 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1606603442] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 22:33:11,475 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 22:33:11,475 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [56, 54, 54] total 132 [2022-03-19 22:33:11,475 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2095013965] [2022-03-19 22:33:11,475 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-19 22:33:11,476 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 132 states [2022-03-19 22:33:11,476 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 22:33:11,476 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 132 interpolants. [2022-03-19 22:33:11,477 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2375, Invalid=14917, Unknown=0, NotChecked=0, Total=17292 [2022-03-19 22:33:11,478 INFO L87 Difference]: Start difference. First operand 539 states and 685 transitions. Second operand has 132 states, 131 states have (on average 1.6030534351145038) internal successors, (210), 129 states have internal predecessors, (210), 71 states have call successors, (74), 4 states have call predecessors, (74), 1 states have return successors, (70), 70 states have call predecessors, (70), 70 states have call successors, (70) [2022-03-19 22:33:25,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 22:33:25,227 INFO L93 Difference]: Finished difference Result 718 states and 892 transitions. [2022-03-19 22:33:25,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 111 states. [2022-03-19 22:33:25,227 INFO L78 Accepts]: Start accepts. Automaton has has 132 states, 131 states have (on average 1.6030534351145038) internal successors, (210), 129 states have internal predecessors, (210), 71 states have call successors, (74), 4 states have call predecessors, (74), 1 states have return successors, (70), 70 states have call predecessors, (70), 70 states have call successors, (70) Word has length 199 [2022-03-19 22:33:25,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 22:33:25,229 INFO L225 Difference]: With dead ends: 718 [2022-03-19 22:33:25,229 INFO L226 Difference]: Without dead ends: 584 [2022-03-19 22:33:25,232 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 609 GetRequests, 367 SyntacticMatches, 4 SemanticMatches, 238 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15035 ImplicationChecksByTransitivity, 14.9s TimeCoverageRelationStatistics Valid=7263, Invalid=50097, Unknown=0, NotChecked=0, Total=57360 [2022-03-19 22:33:25,233 INFO L913 BasicCegarLoop]: 35 mSDtfsCounter, 644 mSDsluCounter, 277 mSDsCounter, 0 mSdLazyCounter, 8906 mSolverCounterSat, 960 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 645 SdHoareTripleChecker+Valid, 312 SdHoareTripleChecker+Invalid, 9866 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 960 IncrementalHoareTripleChecker+Valid, 8906 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.5s IncrementalHoareTripleChecker+Time [2022-03-19 22:33:25,233 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [645 Valid, 312 Invalid, 9866 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [960 Valid, 8906 Invalid, 0 Unknown, 0 Unchecked, 3.5s Time] [2022-03-19 22:33:25,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 584 states. [2022-03-19 22:33:25,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 584 to 582. [2022-03-19 22:33:25,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 582 states, 409 states have (on average 1.0635696821515892) internal successors, (435), 418 states have internal predecessors, (435), 155 states have call successors, (155), 18 states have call predecessors, (155), 17 states have return successors, (154), 145 states have call predecessors, (154), 154 states have call successors, (154) [2022-03-19 22:33:25,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 582 states to 582 states and 744 transitions. [2022-03-19 22:33:25,454 INFO L78 Accepts]: Start accepts. Automaton has 582 states and 744 transitions. Word has length 199 [2022-03-19 22:33:25,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 22:33:25,454 INFO L478 AbstractCegarLoop]: Abstraction has 582 states and 744 transitions. [2022-03-19 22:33:25,454 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 132 states, 131 states have (on average 1.6030534351145038) internal successors, (210), 129 states have internal predecessors, (210), 71 states have call successors, (74), 4 states have call predecessors, (74), 1 states have return successors, (70), 70 states have call predecessors, (70), 70 states have call successors, (70) [2022-03-19 22:33:25,454 INFO L276 IsEmpty]: Start isEmpty. Operand 582 states and 744 transitions. [2022-03-19 22:33:25,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 208 [2022-03-19 22:33:25,456 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 22:33:25,456 INFO L499 BasicCegarLoop]: trace histogram [25, 25, 25, 25, 24, 24, 24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 22:33:25,473 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2022-03-19 22:33:25,671 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 22:33:25,672 INFO L403 AbstractCegarLoop]: === Iteration 34 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 22:33:25,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 22:33:25,672 INFO L85 PathProgramCache]: Analyzing trace with hash 75856550, now seen corresponding path program 30 times [2022-03-19 22:33:25,672 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 22:33:25,672 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1953298535] [2022-03-19 22:33:25,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 22:33:25,672 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 22:33:25,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:33:27,554 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 22:33:27,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:33:27,556 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2022-03-19 22:33:27,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:33:27,558 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2022-03-19 22:33:27,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:33:27,582 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2022-03-19 22:33:27,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:33:27,584 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2022-03-19 22:33:27,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:33:27,586 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2022-03-19 22:33:27,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:33:27,588 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2022-03-19 22:33:27,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:33:27,589 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2022-03-19 22:33:27,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:33:27,591 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2022-03-19 22:33:27,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:33:27,593 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2022-03-19 22:33:27,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:33:27,595 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2022-03-19 22:33:27,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:33:27,597 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2022-03-19 22:33:27,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:33:27,599 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 112 [2022-03-19 22:33:27,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:33:27,600 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 119 [2022-03-19 22:33:27,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:33:27,602 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 126 [2022-03-19 22:33:27,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:33:27,604 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 133 [2022-03-19 22:33:27,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:33:27,615 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 140 [2022-03-19 22:33:27,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:33:27,618 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 147 [2022-03-19 22:33:27,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:33:27,620 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 154 [2022-03-19 22:33:27,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:33:27,622 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 161 [2022-03-19 22:33:27,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:33:27,631 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 168 [2022-03-19 22:33:27,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:33:27,634 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 175 [2022-03-19 22:33:27,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:33:27,636 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 182 [2022-03-19 22:33:27,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:33:27,637 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 189 [2022-03-19 22:33:27,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:33:27,639 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 196 [2022-03-19 22:33:27,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:33:27,642 INFO L134 CoverageAnalysis]: Checked inductivity of 2353 backedges. 830 proven. 419 refuted. 0 times theorem prover too weak. 1104 trivial. 0 not checked. [2022-03-19 22:33:27,642 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 22:33:27,642 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1953298535] [2022-03-19 22:33:27,642 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1953298535] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 22:33:27,642 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1123576131] [2022-03-19 22:33:27,642 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-19 22:33:27,642 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 22:33:27,642 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 22:33:27,655 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 22:33:27,656 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2022-03-19 22:33:27,747 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 25 check-sat command(s) [2022-03-19 22:33:27,747 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 22:33:27,750 INFO L263 TraceCheckSpWp]: Trace formula consists of 518 conjuncts, 81 conjunts are in the unsatisfiable core [2022-03-19 22:33:27,753 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 22:33:31,197 INFO L134 CoverageAnalysis]: Checked inductivity of 2353 backedges. 48 proven. 1201 refuted. 0 times theorem prover too weak. 1104 trivial. 0 not checked. [2022-03-19 22:33:31,198 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 22:33:35,211 INFO L134 CoverageAnalysis]: Checked inductivity of 2353 backedges. 48 proven. 1201 refuted. 0 times theorem prover too weak. 1104 trivial. 0 not checked. [2022-03-19 22:33:35,211 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1123576131] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 22:33:35,211 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 22:33:35,211 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [58, 56, 56] total 162 [2022-03-19 22:33:35,211 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [44022818] [2022-03-19 22:33:35,211 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-19 22:33:35,212 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 162 states [2022-03-19 22:33:35,212 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 22:33:35,212 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 162 interpolants. [2022-03-19 22:33:35,213 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2913, Invalid=23169, Unknown=0, NotChecked=0, Total=26082 [2022-03-19 22:33:35,214 INFO L87 Difference]: Start difference. First operand 582 states and 744 transitions. Second operand has 162 states, 161 states have (on average 1.5093167701863355) internal successors, (243), 159 states have internal predecessors, (243), 74 states have call successors, (77), 4 states have call predecessors, (77), 1 states have return successors, (73), 73 states have call predecessors, (73), 73 states have call successors, (73) [2022-03-19 22:33:51,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 22:33:51,684 INFO L93 Difference]: Finished difference Result 720 states and 892 transitions. [2022-03-19 22:33:51,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2022-03-19 22:33:51,684 INFO L78 Accepts]: Start accepts. Automaton has has 162 states, 161 states have (on average 1.5093167701863355) internal successors, (243), 159 states have internal predecessors, (243), 74 states have call successors, (77), 4 states have call predecessors, (77), 1 states have return successors, (73), 73 states have call predecessors, (73), 73 states have call successors, (73) Word has length 207 [2022-03-19 22:33:51,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 22:33:51,686 INFO L225 Difference]: With dead ends: 720 [2022-03-19 22:33:51,686 INFO L226 Difference]: Without dead ends: 579 [2022-03-19 22:33:51,690 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 605 GetRequests, 358 SyntacticMatches, 3 SemanticMatches, 244 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15569 ImplicationChecksByTransitivity, 21.6s TimeCoverageRelationStatistics Valid=6330, Invalid=53940, Unknown=0, NotChecked=0, Total=60270 [2022-03-19 22:33:51,690 INFO L913 BasicCegarLoop]: 36 mSDtfsCounter, 125 mSDsluCounter, 202 mSDsCounter, 0 mSdLazyCounter, 4698 mSolverCounterSat, 461 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 126 SdHoareTripleChecker+Valid, 238 SdHoareTripleChecker+Invalid, 5159 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 461 IncrementalHoareTripleChecker+Valid, 4698 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2022-03-19 22:33:51,690 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [126 Valid, 238 Invalid, 5159 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [461 Valid, 4698 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2022-03-19 22:33:51,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 579 states. [2022-03-19 22:33:51,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 579 to 579. [2022-03-19 22:33:51,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 579 states, 407 states have (on average 1.0614250614250613) internal successors, (432), 415 states have internal predecessors, (432), 154 states have call successors, (154), 18 states have call predecessors, (154), 17 states have return successors, (153), 145 states have call predecessors, (153), 153 states have call successors, (153) [2022-03-19 22:33:51,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 579 states to 579 states and 739 transitions. [2022-03-19 22:33:51,921 INFO L78 Accepts]: Start accepts. Automaton has 579 states and 739 transitions. Word has length 207 [2022-03-19 22:33:51,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 22:33:51,921 INFO L478 AbstractCegarLoop]: Abstraction has 579 states and 739 transitions. [2022-03-19 22:33:51,921 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 162 states, 161 states have (on average 1.5093167701863355) internal successors, (243), 159 states have internal predecessors, (243), 74 states have call successors, (77), 4 states have call predecessors, (77), 1 states have return successors, (73), 73 states have call predecessors, (73), 73 states have call successors, (73) [2022-03-19 22:33:51,921 INFO L276 IsEmpty]: Start isEmpty. Operand 579 states and 739 transitions. [2022-03-19 22:33:51,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 209 [2022-03-19 22:33:51,923 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 22:33:51,923 INFO L499 BasicCegarLoop]: trace histogram [26, 25, 25, 25, 24, 24, 24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 22:33:51,942 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2022-03-19 22:33:52,140 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2022-03-19 22:33:52,140 INFO L403 AbstractCegarLoop]: === Iteration 35 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 22:33:52,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 22:33:52,141 INFO L85 PathProgramCache]: Analyzing trace with hash -1595552142, now seen corresponding path program 31 times [2022-03-19 22:33:52,141 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 22:33:52,141 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1080816947] [2022-03-19 22:33:52,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 22:33:52,141 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 22:33:52,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:33:53,004 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 22:33:53,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:33:53,007 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-03-19 22:33:53,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:33:53,008 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-03-19 22:33:53,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:33:53,009 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2022-03-19 22:33:53,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:33:53,011 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2022-03-19 22:33:53,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:33:53,012 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2022-03-19 22:33:53,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:33:53,013 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2022-03-19 22:33:53,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:33:53,016 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2022-03-19 22:33:53,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:33:53,020 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2022-03-19 22:33:53,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:33:53,021 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2022-03-19 22:33:53,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:33:53,022 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 99 [2022-03-19 22:33:53,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:33:53,024 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 106 [2022-03-19 22:33:53,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:33:53,026 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 113 [2022-03-19 22:33:53,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:33:53,027 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 120 [2022-03-19 22:33:53,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:33:53,029 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 127 [2022-03-19 22:33:53,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:33:53,044 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 134 [2022-03-19 22:33:53,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:33:53,046 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 141 [2022-03-19 22:33:53,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:33:53,047 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 148 [2022-03-19 22:33:53,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:33:53,048 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 155 [2022-03-19 22:33:53,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:33:53,049 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 162 [2022-03-19 22:33:53,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:33:53,052 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 169 [2022-03-19 22:33:53,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:33:53,053 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 176 [2022-03-19 22:33:53,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:33:53,057 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 183 [2022-03-19 22:33:53,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:33:53,059 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 190 [2022-03-19 22:33:53,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:33:53,061 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 197 [2022-03-19 22:33:53,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:33:53,062 INFO L134 CoverageAnalysis]: Checked inductivity of 2379 backedges. 348 proven. 927 refuted. 0 times theorem prover too weak. 1104 trivial. 0 not checked. [2022-03-19 22:33:53,062 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 22:33:53,062 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1080816947] [2022-03-19 22:33:53,062 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1080816947] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 22:33:53,062 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [677286050] [2022-03-19 22:33:53,063 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-19 22:33:53,063 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 22:33:53,063 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 22:33:53,067 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 22:33:53,067 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2022-03-19 22:33:53,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:33:53,159 INFO L263 TraceCheckSpWp]: Trace formula consists of 523 conjuncts, 81 conjunts are in the unsatisfiable core [2022-03-19 22:33:53,161 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 22:33:54,162 INFO L134 CoverageAnalysis]: Checked inductivity of 2379 backedges. 48 proven. 1227 refuted. 0 times theorem prover too weak. 1104 trivial. 0 not checked. [2022-03-19 22:33:54,162 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 22:33:55,045 INFO L134 CoverageAnalysis]: Checked inductivity of 2379 backedges. 48 proven. 1227 refuted. 0 times theorem prover too weak. 1104 trivial. 0 not checked. [2022-03-19 22:33:55,046 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [677286050] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 22:33:55,046 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 22:33:55,046 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [56, 55, 55] total 110 [2022-03-19 22:33:55,046 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [605130973] [2022-03-19 22:33:55,046 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-19 22:33:55,046 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 110 states [2022-03-19 22:33:55,046 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 22:33:55,047 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 110 interpolants. [2022-03-19 22:33:55,048 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1847, Invalid=10143, Unknown=0, NotChecked=0, Total=11990 [2022-03-19 22:33:55,048 INFO L87 Difference]: Start difference. First operand 579 states and 739 transitions. Second operand has 110 states, 110 states have (on average 1.309090909090909) internal successors, (144), 107 states have internal predecessors, (144), 26 states have call successors, (29), 4 states have call predecessors, (29), 1 states have return successors, (25), 25 states have call predecessors, (25), 25 states have call successors, (25) [2022-03-19 22:33:56,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 22:33:56,984 INFO L93 Difference]: Finished difference Result 595 states and 757 transitions. [2022-03-19 22:33:56,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2022-03-19 22:33:56,985 INFO L78 Accepts]: Start accepts. Automaton has has 110 states, 110 states have (on average 1.309090909090909) internal successors, (144), 107 states have internal predecessors, (144), 26 states have call successors, (29), 4 states have call predecessors, (29), 1 states have return successors, (25), 25 states have call predecessors, (25), 25 states have call successors, (25) Word has length 208 [2022-03-19 22:33:56,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 22:33:56,987 INFO L225 Difference]: With dead ends: 595 [2022-03-19 22:33:56,987 INFO L226 Difference]: Without dead ends: 593 [2022-03-19 22:33:56,988 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 576 GetRequests, 410 SyntacticMatches, 3 SemanticMatches, 163 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7677 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=4676, Invalid=22384, Unknown=0, NotChecked=0, Total=27060 [2022-03-19 22:33:56,988 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 258 mSDsluCounter, 187 mSDsCounter, 0 mSdLazyCounter, 2468 mSolverCounterSat, 580 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 259 SdHoareTripleChecker+Valid, 199 SdHoareTripleChecker+Invalid, 3048 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 580 IncrementalHoareTripleChecker+Valid, 2468 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-19 22:33:56,988 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [259 Valid, 199 Invalid, 3048 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [580 Valid, 2468 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-03-19 22:33:56,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 593 states. [2022-03-19 22:33:57,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 593 to 589. [2022-03-19 22:33:57,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 589 states, 414 states have (on average 1.0603864734299517) internal successors, (439), 422 states have internal predecessors, (439), 156 states have call successors, (156), 19 states have call predecessors, (156), 18 states have return successors, (155), 147 states have call predecessors, (155), 155 states have call successors, (155) [2022-03-19 22:33:57,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 589 states to 589 states and 750 transitions. [2022-03-19 22:33:57,189 INFO L78 Accepts]: Start accepts. Automaton has 589 states and 750 transitions. Word has length 208 [2022-03-19 22:33:57,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 22:33:57,189 INFO L478 AbstractCegarLoop]: Abstraction has 589 states and 750 transitions. [2022-03-19 22:33:57,189 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 110 states, 110 states have (on average 1.309090909090909) internal successors, (144), 107 states have internal predecessors, (144), 26 states have call successors, (29), 4 states have call predecessors, (29), 1 states have return successors, (25), 25 states have call predecessors, (25), 25 states have call successors, (25) [2022-03-19 22:33:57,190 INFO L276 IsEmpty]: Start isEmpty. Operand 589 states and 750 transitions. [2022-03-19 22:33:57,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 216 [2022-03-19 22:33:57,191 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 22:33:57,191 INFO L499 BasicCegarLoop]: trace histogram [26, 26, 26, 26, 25, 25, 25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 22:33:57,209 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2022-03-19 22:33:57,408 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2022-03-19 22:33:57,408 INFO L403 AbstractCegarLoop]: === Iteration 36 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 22:33:57,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 22:33:57,409 INFO L85 PathProgramCache]: Analyzing trace with hash -743160891, now seen corresponding path program 32 times [2022-03-19 22:33:57,409 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 22:33:57,409 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1221947031] [2022-03-19 22:33:57,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 22:33:57,409 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 22:33:57,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:33:59,469 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 22:33:59,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:33:59,472 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-03-19 22:33:59,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:33:59,473 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-03-19 22:33:59,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:33:59,475 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2022-03-19 22:33:59,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:33:59,477 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2022-03-19 22:33:59,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:33:59,479 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2022-03-19 22:33:59,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:33:59,481 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2022-03-19 22:33:59,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:33:59,483 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2022-03-19 22:33:59,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:33:59,485 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2022-03-19 22:33:59,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:33:59,487 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2022-03-19 22:33:59,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:33:59,489 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 99 [2022-03-19 22:33:59,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:33:59,491 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 106 [2022-03-19 22:33:59,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:33:59,493 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 113 [2022-03-19 22:33:59,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:33:59,495 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 120 [2022-03-19 22:33:59,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:33:59,496 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 127 [2022-03-19 22:33:59,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:33:59,498 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 134 [2022-03-19 22:33:59,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:33:59,500 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 141 [2022-03-19 22:33:59,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:33:59,502 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 148 [2022-03-19 22:33:59,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:33:59,504 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 155 [2022-03-19 22:33:59,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:33:59,506 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 162 [2022-03-19 22:33:59,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:33:59,508 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 169 [2022-03-19 22:33:59,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:33:59,510 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 176 [2022-03-19 22:33:59,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:33:59,511 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 183 [2022-03-19 22:33:59,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:33:59,513 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 190 [2022-03-19 22:33:59,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:33:59,514 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 197 [2022-03-19 22:33:59,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:33:59,516 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 204 [2022-03-19 22:33:59,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:33:59,518 INFO L134 CoverageAnalysis]: Checked inductivity of 2551 backedges. 902 proven. 449 refuted. 0 times theorem prover too weak. 1200 trivial. 0 not checked. [2022-03-19 22:33:59,518 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 22:33:59,518 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1221947031] [2022-03-19 22:33:59,518 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1221947031] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 22:33:59,518 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1356076115] [2022-03-19 22:33:59,518 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 22:33:59,518 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 22:33:59,519 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 22:33:59,532 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 22:33:59,543 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2022-03-19 22:33:59,620 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 22:33:59,620 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 22:33:59,624 INFO L263 TraceCheckSpWp]: Trace formula consists of 537 conjuncts, 160 conjunts are in the unsatisfiable core [2022-03-19 22:33:59,627 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 22:34:02,448 INFO L134 CoverageAnalysis]: Checked inductivity of 2551 backedges. 50 proven. 1301 refuted. 0 times theorem prover too weak. 1200 trivial. 0 not checked. [2022-03-19 22:34:02,448 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 22:34:06,565 INFO L134 CoverageAnalysis]: Checked inductivity of 2551 backedges. 50 proven. 1301 refuted. 0 times theorem prover too weak. 1200 trivial. 0 not checked. [2022-03-19 22:34:06,566 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1356076115] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 22:34:06,566 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 22:34:06,566 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [60, 58, 58] total 168 [2022-03-19 22:34:06,566 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1883351049] [2022-03-19 22:34:06,566 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-19 22:34:06,566 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 168 states [2022-03-19 22:34:06,566 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 22:34:06,567 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 168 interpolants. [2022-03-19 22:34:06,568 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3531, Invalid=24525, Unknown=0, NotChecked=0, Total=28056 [2022-03-19 22:34:06,568 INFO L87 Difference]: Start difference. First operand 589 states and 750 transitions. Second operand has 168 states, 167 states have (on average 1.5089820359281436) internal successors, (252), 165 states have internal predecessors, (252), 77 states have call successors, (80), 4 states have call predecessors, (80), 1 states have return successors, (76), 76 states have call predecessors, (76), 76 states have call successors, (76) [2022-03-19 22:34:22,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 22:34:22,091 INFO L93 Difference]: Finished difference Result 781 states and 972 transitions. [2022-03-19 22:34:22,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 119 states. [2022-03-19 22:34:22,092 INFO L78 Accepts]: Start accepts. Automaton has has 168 states, 167 states have (on average 1.5089820359281436) internal successors, (252), 165 states have internal predecessors, (252), 77 states have call successors, (80), 4 states have call predecessors, (80), 1 states have return successors, (76), 76 states have call predecessors, (76), 76 states have call successors, (76) Word has length 215 [2022-03-19 22:34:22,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 22:34:22,094 INFO L225 Difference]: With dead ends: 781 [2022-03-19 22:34:22,094 INFO L226 Difference]: Without dead ends: 637 [2022-03-19 22:34:22,125 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 657 GetRequests, 372 SyntacticMatches, 3 SemanticMatches, 282 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24185 ImplicationChecksByTransitivity, 18.3s TimeCoverageRelationStatistics Valid=9185, Invalid=71187, Unknown=0, NotChecked=0, Total=80372 [2022-03-19 22:34:22,125 INFO L913 BasicCegarLoop]: 37 mSDtfsCounter, 728 mSDsluCounter, 292 mSDsCounter, 0 mSdLazyCounter, 10421 mSolverCounterSat, 1147 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 729 SdHoareTripleChecker+Valid, 329 SdHoareTripleChecker+Invalid, 11568 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1147 IncrementalHoareTripleChecker+Valid, 10421 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.8s IncrementalHoareTripleChecker+Time [2022-03-19 22:34:22,126 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [729 Valid, 329 Invalid, 11568 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1147 Valid, 10421 Invalid, 0 Unknown, 0 Unchecked, 3.8s Time] [2022-03-19 22:34:22,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 637 states. [2022-03-19 22:34:22,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 637 to 635. [2022-03-19 22:34:22,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 635 states, 446 states have (on average 1.062780269058296) internal successors, (474), 455 states have internal predecessors, (474), 170 states have call successors, (170), 19 states have call predecessors, (170), 18 states have return successors, (169), 160 states have call predecessors, (169), 169 states have call successors, (169) [2022-03-19 22:34:22,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 635 states to 635 states and 813 transitions. [2022-03-19 22:34:22,364 INFO L78 Accepts]: Start accepts. Automaton has 635 states and 813 transitions. Word has length 215 [2022-03-19 22:34:22,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 22:34:22,364 INFO L478 AbstractCegarLoop]: Abstraction has 635 states and 813 transitions. [2022-03-19 22:34:22,365 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 168 states, 167 states have (on average 1.5089820359281436) internal successors, (252), 165 states have internal predecessors, (252), 77 states have call successors, (80), 4 states have call predecessors, (80), 1 states have return successors, (76), 76 states have call predecessors, (76), 76 states have call successors, (76) [2022-03-19 22:34:22,365 INFO L276 IsEmpty]: Start isEmpty. Operand 635 states and 813 transitions. [2022-03-19 22:34:22,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 224 [2022-03-19 22:34:22,366 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 22:34:22,367 INFO L499 BasicCegarLoop]: trace histogram [27, 27, 27, 27, 26, 26, 26, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 22:34:22,385 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2022-03-19 22:34:22,569 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2022-03-19 22:34:22,569 INFO L403 AbstractCegarLoop]: === Iteration 37 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 22:34:22,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 22:34:22,569 INFO L85 PathProgramCache]: Analyzing trace with hash 930469318, now seen corresponding path program 33 times [2022-03-19 22:34:22,569 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 22:34:22,569 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1166316936] [2022-03-19 22:34:22,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 22:34:22,569 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 22:34:22,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:34:24,831 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 22:34:24,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:34:24,833 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2022-03-19 22:34:24,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:34:24,835 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2022-03-19 22:34:24,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:34:24,837 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2022-03-19 22:34:24,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:34:24,839 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2022-03-19 22:34:24,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:34:24,841 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2022-03-19 22:34:24,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:34:24,843 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2022-03-19 22:34:24,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:34:24,844 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2022-03-19 22:34:24,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:34:24,846 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2022-03-19 22:34:24,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:34:24,848 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2022-03-19 22:34:24,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:34:24,849 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2022-03-19 22:34:24,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:34:24,851 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 107 [2022-03-19 22:34:24,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:34:24,853 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2022-03-19 22:34:24,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:34:24,854 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 121 [2022-03-19 22:34:24,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:34:24,856 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 128 [2022-03-19 22:34:24,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:34:24,858 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 135 [2022-03-19 22:34:24,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:34:24,859 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 142 [2022-03-19 22:34:24,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:34:24,861 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 149 [2022-03-19 22:34:24,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:34:24,863 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 156 [2022-03-19 22:34:24,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:34:24,865 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 163 [2022-03-19 22:34:24,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:34:24,866 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 170 [2022-03-19 22:34:24,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:34:24,868 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 177 [2022-03-19 22:34:24,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:34:24,869 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 184 [2022-03-19 22:34:24,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:34:24,871 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 191 [2022-03-19 22:34:24,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:34:24,872 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 198 [2022-03-19 22:34:24,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:34:24,875 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 205 [2022-03-19 22:34:24,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:34:24,876 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 212 [2022-03-19 22:34:24,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:34:24,879 INFO L134 CoverageAnalysis]: Checked inductivity of 2757 backedges. 977 proven. 480 refuted. 0 times theorem prover too weak. 1300 trivial. 0 not checked. [2022-03-19 22:34:24,879 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 22:34:24,879 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1166316936] [2022-03-19 22:34:24,879 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1166316936] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 22:34:24,879 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [469416679] [2022-03-19 22:34:24,879 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-19 22:34:24,879 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 22:34:24,879 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 22:34:24,883 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 22:34:24,890 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2022-03-19 22:34:24,999 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 27 check-sat command(s) [2022-03-19 22:34:24,999 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 22:34:25,003 INFO L263 TraceCheckSpWp]: Trace formula consists of 556 conjuncts, 87 conjunts are in the unsatisfiable core [2022-03-19 22:34:25,006 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 22:34:29,033 INFO L134 CoverageAnalysis]: Checked inductivity of 2757 backedges. 52 proven. 1405 refuted. 0 times theorem prover too weak. 1300 trivial. 0 not checked. [2022-03-19 22:34:29,033 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 22:34:34,317 INFO L134 CoverageAnalysis]: Checked inductivity of 2757 backedges. 52 proven. 1405 refuted. 0 times theorem prover too weak. 1300 trivial. 0 not checked. [2022-03-19 22:34:34,318 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [469416679] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 22:34:34,318 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 22:34:34,318 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [62, 60, 60] total 174 [2022-03-19 22:34:34,318 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1141924103] [2022-03-19 22:34:34,318 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-19 22:34:34,319 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 174 states [2022-03-19 22:34:34,319 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 22:34:34,319 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 174 interpolants. [2022-03-19 22:34:34,320 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3359, Invalid=26743, Unknown=0, NotChecked=0, Total=30102 [2022-03-19 22:34:34,321 INFO L87 Difference]: Start difference. First operand 635 states and 813 transitions. Second operand has 174 states, 173 states have (on average 1.5086705202312138) internal successors, (261), 171 states have internal predecessors, (261), 80 states have call successors, (83), 4 states have call predecessors, (83), 1 states have return successors, (79), 79 states have call predecessors, (79), 79 states have call successors, (79) [2022-03-19 22:34:51,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 22:34:51,893 INFO L93 Difference]: Finished difference Result 787 states and 977 transitions. [2022-03-19 22:34:51,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2022-03-19 22:34:51,907 INFO L78 Accepts]: Start accepts. Automaton has has 174 states, 173 states have (on average 1.5086705202312138) internal successors, (261), 171 states have internal predecessors, (261), 80 states have call successors, (83), 4 states have call predecessors, (83), 1 states have return successors, (79), 79 states have call predecessors, (79), 79 states have call successors, (79) Word has length 223 [2022-03-19 22:34:51,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 22:34:51,909 INFO L225 Difference]: With dead ends: 787 [2022-03-19 22:34:51,910 INFO L226 Difference]: Without dead ends: 636 [2022-03-19 22:34:51,913 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 651 GetRequests, 386 SyntacticMatches, 3 SemanticMatches, 262 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17972 ImplicationChecksByTransitivity, 24.2s TimeCoverageRelationStatistics Valid=7287, Invalid=62145, Unknown=0, NotChecked=0, Total=69432 [2022-03-19 22:34:51,914 INFO L913 BasicCegarLoop]: 38 mSDtfsCounter, 133 mSDsluCounter, 237 mSDsCounter, 0 mSdLazyCounter, 6079 mSolverCounterSat, 602 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 134 SdHoareTripleChecker+Valid, 275 SdHoareTripleChecker+Invalid, 6681 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 602 IncrementalHoareTripleChecker+Valid, 6079 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2022-03-19 22:34:51,914 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [134 Valid, 275 Invalid, 6681 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [602 Valid, 6079 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2022-03-19 22:34:51,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 636 states. [2022-03-19 22:34:52,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 636 to 635. [2022-03-19 22:34:52,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 635 states, 446 states have (on average 1.0605381165919283) internal successors, (473), 455 states have internal predecessors, (473), 170 states have call successors, (170), 19 states have call predecessors, (170), 18 states have return successors, (169), 160 states have call predecessors, (169), 169 states have call successors, (169) [2022-03-19 22:34:52,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 635 states to 635 states and 812 transitions. [2022-03-19 22:34:52,159 INFO L78 Accepts]: Start accepts. Automaton has 635 states and 812 transitions. Word has length 223 [2022-03-19 22:34:52,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 22:34:52,159 INFO L478 AbstractCegarLoop]: Abstraction has 635 states and 812 transitions. [2022-03-19 22:34:52,159 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 174 states, 173 states have (on average 1.5086705202312138) internal successors, (261), 171 states have internal predecessors, (261), 80 states have call successors, (83), 4 states have call predecessors, (83), 1 states have return successors, (79), 79 states have call predecessors, (79), 79 states have call successors, (79) [2022-03-19 22:34:52,159 INFO L276 IsEmpty]: Start isEmpty. Operand 635 states and 812 transitions. [2022-03-19 22:34:52,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 225 [2022-03-19 22:34:52,161 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 22:34:52,161 INFO L499 BasicCegarLoop]: trace histogram [28, 27, 27, 27, 26, 26, 26, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 22:34:52,179 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2022-03-19 22:34:52,378 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36,37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 22:34:52,379 INFO L403 AbstractCegarLoop]: === Iteration 38 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 22:34:52,379 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 22:34:52,379 INFO L85 PathProgramCache]: Analyzing trace with hash 1848447378, now seen corresponding path program 34 times [2022-03-19 22:34:52,379 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 22:34:52,379 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2099146130] [2022-03-19 22:34:52,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 22:34:52,379 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 22:34:52,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:34:53,339 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 22:34:53,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:34:53,341 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-03-19 22:34:53,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:34:53,343 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2022-03-19 22:34:53,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:34:53,344 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2022-03-19 22:34:53,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:34:53,345 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2022-03-19 22:34:53,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:34:53,347 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2022-03-19 22:34:53,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:34:53,348 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2022-03-19 22:34:53,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:34:53,349 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2022-03-19 22:34:53,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:34:53,350 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2022-03-19 22:34:53,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:34:53,351 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2022-03-19 22:34:53,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:34:53,353 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2022-03-19 22:34:53,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:34:53,354 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 108 [2022-03-19 22:34:53,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:34:53,355 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 115 [2022-03-19 22:34:53,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:34:53,356 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 122 [2022-03-19 22:34:53,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:34:53,357 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 129 [2022-03-19 22:34:53,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:34:53,359 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 136 [2022-03-19 22:34:53,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:34:53,361 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 143 [2022-03-19 22:34:53,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:34:53,362 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 150 [2022-03-19 22:34:53,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:34:53,363 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 157 [2022-03-19 22:34:53,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:34:53,364 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 164 [2022-03-19 22:34:53,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:34:53,366 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 171 [2022-03-19 22:34:53,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:34:53,367 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 178 [2022-03-19 22:34:53,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:34:53,369 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 185 [2022-03-19 22:34:53,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:34:53,370 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 192 [2022-03-19 22:34:53,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:34:53,371 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 199 [2022-03-19 22:34:53,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:34:53,373 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 206 [2022-03-19 22:34:53,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:34:53,374 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 213 [2022-03-19 22:34:53,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:34:53,376 INFO L134 CoverageAnalysis]: Checked inductivity of 2785 backedges. 403 proven. 1082 refuted. 0 times theorem prover too weak. 1300 trivial. 0 not checked. [2022-03-19 22:34:53,376 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 22:34:53,376 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2099146130] [2022-03-19 22:34:53,376 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2099146130] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 22:34:53,376 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [714113103] [2022-03-19 22:34:53,376 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 22:34:53,376 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 22:34:53,376 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 22:34:53,377 INFO L229 MonitoredProcess]: Starting monitored process 38 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 22:34:53,379 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2022-03-19 22:34:53,466 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 22:34:53,466 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 22:34:53,470 INFO L263 TraceCheckSpWp]: Trace formula consists of 561 conjuncts, 87 conjunts are in the unsatisfiable core [2022-03-19 22:34:53,474 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 22:34:54,802 INFO L134 CoverageAnalysis]: Checked inductivity of 2785 backedges. 52 proven. 1433 refuted. 0 times theorem prover too weak. 1300 trivial. 0 not checked. [2022-03-19 22:34:54,802 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 22:34:55,734 INFO L134 CoverageAnalysis]: Checked inductivity of 2785 backedges. 52 proven. 1433 refuted. 0 times theorem prover too weak. 1300 trivial. 0 not checked. [2022-03-19 22:34:55,734 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [714113103] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 22:34:55,734 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 22:34:55,734 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [60, 59, 59] total 118 [2022-03-19 22:34:55,734 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [484433757] [2022-03-19 22:34:55,734 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-19 22:34:55,735 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 118 states [2022-03-19 22:34:55,735 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 22:34:55,736 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 118 interpolants. [2022-03-19 22:34:55,737 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2128, Invalid=11678, Unknown=0, NotChecked=0, Total=13806 [2022-03-19 22:34:55,738 INFO L87 Difference]: Start difference. First operand 635 states and 812 transitions. Second operand has 118 states, 118 states have (on average 1.305084745762712) internal successors, (154), 115 states have internal predecessors, (154), 28 states have call successors, (31), 4 states have call predecessors, (31), 1 states have return successors, (27), 27 states have call predecessors, (27), 27 states have call successors, (27) [2022-03-19 22:34:58,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 22:34:58,186 INFO L93 Difference]: Finished difference Result 651 states and 830 transitions. [2022-03-19 22:34:58,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2022-03-19 22:34:58,186 INFO L78 Accepts]: Start accepts. Automaton has has 118 states, 118 states have (on average 1.305084745762712) internal successors, (154), 115 states have internal predecessors, (154), 28 states have call successors, (31), 4 states have call predecessors, (31), 1 states have return successors, (27), 27 states have call predecessors, (27), 27 states have call successors, (27) Word has length 224 [2022-03-19 22:34:58,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 22:34:58,188 INFO L225 Difference]: With dead ends: 651 [2022-03-19 22:34:58,188 INFO L226 Difference]: Without dead ends: 649 [2022-03-19 22:34:58,190 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 620 GetRequests, 442 SyntacticMatches, 3 SemanticMatches, 175 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8858 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=5397, Invalid=25755, Unknown=0, NotChecked=0, Total=31152 [2022-03-19 22:34:58,207 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 256 mSDsluCounter, 167 mSDsCounter, 0 mSdLazyCounter, 2615 mSolverCounterSat, 655 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 257 SdHoareTripleChecker+Valid, 179 SdHoareTripleChecker+Invalid, 3270 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 655 IncrementalHoareTripleChecker+Valid, 2615 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-03-19 22:34:58,207 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [257 Valid, 179 Invalid, 3270 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [655 Valid, 2615 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-03-19 22:34:58,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 649 states. [2022-03-19 22:34:58,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 649 to 645. [2022-03-19 22:34:58,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 645 states, 453 states have (on average 1.0596026490066226) internal successors, (480), 462 states have internal predecessors, (480), 172 states have call successors, (172), 20 states have call predecessors, (172), 19 states have return successors, (171), 162 states have call predecessors, (171), 171 states have call successors, (171) [2022-03-19 22:34:58,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 645 states to 645 states and 823 transitions. [2022-03-19 22:34:58,424 INFO L78 Accepts]: Start accepts. Automaton has 645 states and 823 transitions. Word has length 224 [2022-03-19 22:34:58,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 22:34:58,424 INFO L478 AbstractCegarLoop]: Abstraction has 645 states and 823 transitions. [2022-03-19 22:34:58,424 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 118 states, 118 states have (on average 1.305084745762712) internal successors, (154), 115 states have internal predecessors, (154), 28 states have call successors, (31), 4 states have call predecessors, (31), 1 states have return successors, (27), 27 states have call predecessors, (27), 27 states have call successors, (27) [2022-03-19 22:34:58,425 INFO L276 IsEmpty]: Start isEmpty. Operand 645 states and 823 transitions. [2022-03-19 22:34:58,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 232 [2022-03-19 22:34:58,426 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 22:34:58,426 INFO L499 BasicCegarLoop]: trace histogram [28, 28, 28, 28, 27, 27, 27, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 22:34:58,469 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Ended with exit code 0 [2022-03-19 22:34:58,651 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2022-03-19 22:34:58,651 INFO L403 AbstractCegarLoop]: === Iteration 39 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 22:34:58,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 22:34:58,652 INFO L85 PathProgramCache]: Analyzing trace with hash -1015989083, now seen corresponding path program 35 times [2022-03-19 22:34:58,652 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 22:34:58,652 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1184199348] [2022-03-19 22:34:58,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 22:34:58,652 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 22:34:58,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:35:01,027 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 22:35:01,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:35:01,029 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-03-19 22:35:01,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:35:01,031 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2022-03-19 22:35:01,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:35:01,033 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2022-03-19 22:35:01,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:35:01,035 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2022-03-19 22:35:01,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:35:01,037 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2022-03-19 22:35:01,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:35:01,039 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2022-03-19 22:35:01,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:35:01,041 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2022-03-19 22:35:01,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:35:01,043 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2022-03-19 22:35:01,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:35:01,045 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2022-03-19 22:35:01,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:35:01,047 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2022-03-19 22:35:01,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:35:01,049 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 108 [2022-03-19 22:35:01,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:35:01,050 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 115 [2022-03-19 22:35:01,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:35:01,052 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 122 [2022-03-19 22:35:01,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:35:01,054 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 129 [2022-03-19 22:35:01,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:35:01,056 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 136 [2022-03-19 22:35:01,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:35:01,057 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 143 [2022-03-19 22:35:01,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:35:01,059 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 150 [2022-03-19 22:35:01,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:35:01,061 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 157 [2022-03-19 22:35:01,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:35:01,062 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 164 [2022-03-19 22:35:01,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:35:01,064 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 171 [2022-03-19 22:35:01,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:35:01,066 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 178 [2022-03-19 22:35:01,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:35:01,067 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 185 [2022-03-19 22:35:01,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:35:01,069 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 192 [2022-03-19 22:35:01,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:35:01,071 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 199 [2022-03-19 22:35:01,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:35:01,072 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 206 [2022-03-19 22:35:01,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:35:01,074 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 213 [2022-03-19 22:35:01,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:35:01,076 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 220 [2022-03-19 22:35:01,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:35:01,079 INFO L134 CoverageAnalysis]: Checked inductivity of 2971 backedges. 1055 proven. 512 refuted. 0 times theorem prover too weak. 1404 trivial. 0 not checked. [2022-03-19 22:35:01,079 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 22:35:01,079 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1184199348] [2022-03-19 22:35:01,079 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1184199348] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 22:35:01,079 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [764227410] [2022-03-19 22:35:01,079 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-19 22:35:01,079 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 22:35:01,079 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 22:35:01,080 INFO L229 MonitoredProcess]: Starting monitored process 39 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 22:35:01,091 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2022-03-19 22:35:01,199 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 28 check-sat command(s) [2022-03-19 22:35:01,199 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 22:35:01,202 INFO L263 TraceCheckSpWp]: Trace formula consists of 575 conjuncts, 117 conjunts are in the unsatisfiable core [2022-03-19 22:35:01,205 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 22:35:03,757 INFO L134 CoverageAnalysis]: Checked inductivity of 2971 backedges. 54 proven. 1513 refuted. 0 times theorem prover too weak. 1404 trivial. 0 not checked. [2022-03-19 22:35:03,757 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 22:35:09,526 INFO L134 CoverageAnalysis]: Checked inductivity of 2971 backedges. 54 proven. 1513 refuted. 0 times theorem prover too weak. 1404 trivial. 0 not checked. [2022-03-19 22:35:09,527 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [764227410] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 22:35:09,527 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 22:35:09,527 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [64, 62, 62] total 152 [2022-03-19 22:35:09,527 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [967481592] [2022-03-19 22:35:09,527 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-19 22:35:09,528 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 152 states [2022-03-19 22:35:09,528 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 22:35:09,529 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 152 interpolants. [2022-03-19 22:35:09,529 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3157, Invalid=19795, Unknown=0, NotChecked=0, Total=22952 [2022-03-19 22:35:09,530 INFO L87 Difference]: Start difference. First operand 645 states and 823 transitions. Second operand has 152 states, 151 states have (on average 1.6026490066225165) internal successors, (242), 149 states have internal predecessors, (242), 83 states have call successors, (86), 4 states have call predecessors, (86), 1 states have return successors, (82), 82 states have call predecessors, (82), 82 states have call successors, (82) [2022-03-19 22:35:29,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 22:35:29,133 INFO L93 Difference]: Finished difference Result 893 states and 1115 transitions. [2022-03-19 22:35:29,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 127 states. [2022-03-19 22:35:29,140 INFO L78 Accepts]: Start accepts. Automaton has has 152 states, 151 states have (on average 1.6026490066225165) internal successors, (242), 149 states have internal predecessors, (242), 83 states have call successors, (86), 4 states have call predecessors, (86), 1 states have return successors, (82), 82 states have call predecessors, (82), 82 states have call successors, (82) Word has length 231 [2022-03-19 22:35:29,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 22:35:29,143 INFO L225 Difference]: With dead ends: 893 [2022-03-19 22:35:29,143 INFO L226 Difference]: Without dead ends: 739 [2022-03-19 22:35:29,146 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 705 GetRequests, 427 SyntacticMatches, 4 SemanticMatches, 274 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19649 ImplicationChecksByTransitivity, 22.5s TimeCoverageRelationStatistics Valid=9575, Invalid=66325, Unknown=0, NotChecked=0, Total=75900 [2022-03-19 22:35:29,146 INFO L913 BasicCegarLoop]: 39 mSDtfsCounter, 777 mSDsluCounter, 317 mSDsCounter, 0 mSdLazyCounter, 11991 mSolverCounterSat, 1258 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 778 SdHoareTripleChecker+Valid, 356 SdHoareTripleChecker+Invalid, 13249 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1258 IncrementalHoareTripleChecker+Valid, 11991 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.5s IncrementalHoareTripleChecker+Time [2022-03-19 22:35:29,147 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [778 Valid, 356 Invalid, 13249 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1258 Valid, 11991 Invalid, 0 Unknown, 0 Unchecked, 4.5s Time] [2022-03-19 22:35:29,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 739 states. [2022-03-19 22:35:29,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 739 to 737. [2022-03-19 22:35:29,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 737 states, 516 states have (on average 1.058139534883721) internal successors, (546), 526 states have internal predecessors, (546), 200 states have call successors, (200), 21 states have call predecessors, (200), 20 states have return successors, (199), 189 states have call predecessors, (199), 199 states have call successors, (199) [2022-03-19 22:35:29,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 737 states to 737 states and 945 transitions. [2022-03-19 22:35:29,437 INFO L78 Accepts]: Start accepts. Automaton has 737 states and 945 transitions. Word has length 231 [2022-03-19 22:35:29,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 22:35:29,438 INFO L478 AbstractCegarLoop]: Abstraction has 737 states and 945 transitions. [2022-03-19 22:35:29,438 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 152 states, 151 states have (on average 1.6026490066225165) internal successors, (242), 149 states have internal predecessors, (242), 83 states have call successors, (86), 4 states have call predecessors, (86), 1 states have return successors, (82), 82 states have call predecessors, (82), 82 states have call successors, (82) [2022-03-19 22:35:29,438 INFO L276 IsEmpty]: Start isEmpty. Operand 737 states and 945 transitions. [2022-03-19 22:35:29,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 240 [2022-03-19 22:35:29,440 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 22:35:29,440 INFO L499 BasicCegarLoop]: trace histogram [29, 29, 29, 29, 28, 28, 28, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 22:35:29,458 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2022-03-19 22:35:29,656 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2022-03-19 22:35:29,656 INFO L403 AbstractCegarLoop]: === Iteration 40 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 22:35:29,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 22:35:29,657 INFO L85 PathProgramCache]: Analyzing trace with hash 1152727270, now seen corresponding path program 36 times [2022-03-19 22:35:29,657 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 22:35:29,657 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [532413616] [2022-03-19 22:35:29,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 22:35:29,657 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 22:35:29,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:35:32,204 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 22:35:32,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:35:32,206 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-03-19 22:35:32,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:35:32,207 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2022-03-19 22:35:32,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:35:32,209 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2022-03-19 22:35:32,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:35:32,210 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2022-03-19 22:35:32,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:35:32,212 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2022-03-19 22:35:32,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:35:32,213 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2022-03-19 22:35:32,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:35:32,215 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2022-03-19 22:35:32,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:35:32,216 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2022-03-19 22:35:32,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:35:32,218 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2022-03-19 22:35:32,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:35:32,219 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 102 [2022-03-19 22:35:32,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:35:32,234 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 109 [2022-03-19 22:35:32,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:35:32,236 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 116 [2022-03-19 22:35:32,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:35:32,238 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 123 [2022-03-19 22:35:32,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:35:32,239 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 130 [2022-03-19 22:35:32,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:35:32,241 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 137 [2022-03-19 22:35:32,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:35:32,242 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 144 [2022-03-19 22:35:32,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:35:32,244 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 151 [2022-03-19 22:35:32,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:35:32,245 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 158 [2022-03-19 22:35:32,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:35:32,247 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 165 [2022-03-19 22:35:32,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:35:32,248 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 172 [2022-03-19 22:35:32,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:35:32,250 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 179 [2022-03-19 22:35:32,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:35:32,267 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 186 [2022-03-19 22:35:32,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:35:32,287 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 193 [2022-03-19 22:35:32,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:35:32,290 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 200 [2022-03-19 22:35:32,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:35:32,292 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 207 [2022-03-19 22:35:32,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:35:32,293 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 214 [2022-03-19 22:35:32,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:35:32,295 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 221 [2022-03-19 22:35:32,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:35:32,297 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 228 [2022-03-19 22:35:32,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:35:32,299 INFO L134 CoverageAnalysis]: Checked inductivity of 3193 backedges. 1136 proven. 545 refuted. 0 times theorem prover too weak. 1512 trivial. 0 not checked. [2022-03-19 22:35:32,299 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 22:35:32,300 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [532413616] [2022-03-19 22:35:32,300 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [532413616] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 22:35:32,300 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [217357773] [2022-03-19 22:35:32,300 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-19 22:35:32,300 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 22:35:32,300 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 22:35:32,301 INFO L229 MonitoredProcess]: Starting monitored process 40 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 22:35:32,305 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2022-03-19 22:35:32,419 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 29 check-sat command(s) [2022-03-19 22:35:32,420 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 22:35:32,423 INFO L263 TraceCheckSpWp]: Trace formula consists of 594 conjuncts, 121 conjunts are in the unsatisfiable core [2022-03-19 22:35:32,426 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 22:35:35,167 INFO L134 CoverageAnalysis]: Checked inductivity of 3193 backedges. 56 proven. 1625 refuted. 0 times theorem prover too weak. 1512 trivial. 0 not checked. [2022-03-19 22:35:35,168 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 22:35:41,322 INFO L134 CoverageAnalysis]: Checked inductivity of 3193 backedges. 56 proven. 1625 refuted. 0 times theorem prover too weak. 1512 trivial. 0 not checked. [2022-03-19 22:35:41,322 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [217357773] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 22:35:41,322 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 22:35:41,323 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [66, 64, 64] total 157 [2022-03-19 22:35:41,323 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [732919131] [2022-03-19 22:35:41,323 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-19 22:35:41,323 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 157 states [2022-03-19 22:35:41,323 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 22:35:41,324 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 157 interpolants. [2022-03-19 22:35:41,325 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3370, Invalid=21122, Unknown=0, NotChecked=0, Total=24492 [2022-03-19 22:35:41,325 INFO L87 Difference]: Start difference. First operand 737 states and 945 transitions. Second operand has 157 states, 156 states have (on average 1.6025641025641026) internal successors, (250), 154 states have internal predecessors, (250), 86 states have call successors, (89), 4 states have call predecessors, (89), 1 states have return successors, (85), 85 states have call predecessors, (85), 85 states have call successors, (85) [2022-03-19 22:36:02,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 22:36:02,420 INFO L93 Difference]: Finished difference Result 989 states and 1239 transitions. [2022-03-19 22:36:02,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 131 states. [2022-03-19 22:36:02,421 INFO L78 Accepts]: Start accepts. Automaton has has 157 states, 156 states have (on average 1.6025641025641026) internal successors, (250), 154 states have internal predecessors, (250), 86 states have call successors, (89), 4 states have call predecessors, (89), 1 states have return successors, (85), 85 states have call predecessors, (85), 85 states have call successors, (85) Word has length 239 [2022-03-19 22:36:02,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 22:36:02,424 INFO L225 Difference]: With dead ends: 989 [2022-03-19 22:36:02,424 INFO L226 Difference]: Without dead ends: 828 [2022-03-19 22:36:02,428 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 729 GetRequests, 442 SyntacticMatches, 4 SemanticMatches, 283 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21202 ImplicationChecksByTransitivity, 24.2s TimeCoverageRelationStatistics Valid=10203, Invalid=70737, Unknown=0, NotChecked=0, Total=80940 [2022-03-19 22:36:02,430 INFO L913 BasicCegarLoop]: 40 mSDtfsCounter, 832 mSDsluCounter, 322 mSDsCounter, 0 mSdLazyCounter, 12289 mSolverCounterSat, 1393 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 833 SdHoareTripleChecker+Valid, 362 SdHoareTripleChecker+Invalid, 13682 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1393 IncrementalHoareTripleChecker+Valid, 12289 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.9s IncrementalHoareTripleChecker+Time [2022-03-19 22:36:02,430 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [833 Valid, 362 Invalid, 13682 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1393 Valid, 12289 Invalid, 0 Unknown, 0 Unchecked, 4.9s Time] [2022-03-19 22:36:02,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 828 states. [2022-03-19 22:36:02,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 828 to 827. [2022-03-19 22:36:02,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 827 states, 577 states have (on average 1.0537261698440208) internal successors, (608), 587 states have internal predecessors, (608), 228 states have call successors, (228), 22 states have call predecessors, (228), 21 states have return successors, (227), 217 states have call predecessors, (227), 227 states have call successors, (227) [2022-03-19 22:36:02,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 827 states to 827 states and 1063 transitions. [2022-03-19 22:36:02,781 INFO L78 Accepts]: Start accepts. Automaton has 827 states and 1063 transitions. Word has length 239 [2022-03-19 22:36:02,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 22:36:02,781 INFO L478 AbstractCegarLoop]: Abstraction has 827 states and 1063 transitions. [2022-03-19 22:36:02,781 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 157 states, 156 states have (on average 1.6025641025641026) internal successors, (250), 154 states have internal predecessors, (250), 86 states have call successors, (89), 4 states have call predecessors, (89), 1 states have return successors, (85), 85 states have call predecessors, (85), 85 states have call successors, (85) [2022-03-19 22:36:02,781 INFO L276 IsEmpty]: Start isEmpty. Operand 827 states and 1063 transitions. [2022-03-19 22:36:02,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 248 [2022-03-19 22:36:02,783 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 22:36:02,784 INFO L499 BasicCegarLoop]: trace histogram [30, 30, 30, 30, 29, 29, 29, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 22:36:02,822 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2022-03-19 22:36:02,984 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2022-03-19 22:36:02,984 INFO L403 AbstractCegarLoop]: === Iteration 41 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 22:36:02,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 22:36:02,985 INFO L85 PathProgramCache]: Analyzing trace with hash -1070191227, now seen corresponding path program 37 times [2022-03-19 22:36:02,985 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 22:36:02,985 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1235627876] [2022-03-19 22:36:02,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 22:36:02,985 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 22:36:03,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:36:05,295 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 22:36:05,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:36:05,297 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2022-03-19 22:36:05,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:36:05,298 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-03-19 22:36:05,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:36:05,299 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2022-03-19 22:36:05,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:36:05,301 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2022-03-19 22:36:05,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:36:05,302 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2022-03-19 22:36:05,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:36:05,304 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2022-03-19 22:36:05,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:36:05,306 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2022-03-19 22:36:05,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:36:05,307 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2022-03-19 22:36:05,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:36:05,309 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2022-03-19 22:36:05,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:36:05,310 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2022-03-19 22:36:05,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:36:05,311 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 110 [2022-03-19 22:36:05,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:36:05,313 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 117 [2022-03-19 22:36:05,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:36:05,314 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 124 [2022-03-19 22:36:05,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:36:05,315 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 131 [2022-03-19 22:36:05,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:36:05,317 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 138 [2022-03-19 22:36:05,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:36:05,318 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 145 [2022-03-19 22:36:05,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:36:05,319 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 152 [2022-03-19 22:36:05,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:36:05,322 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 159 [2022-03-19 22:36:05,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:36:05,323 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 166 [2022-03-19 22:36:05,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:36:05,324 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 173 [2022-03-19 22:36:05,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:36:05,326 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 180 [2022-03-19 22:36:05,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:36:05,328 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 187 [2022-03-19 22:36:05,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:36:05,330 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 194 [2022-03-19 22:36:05,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:36:05,331 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 201 [2022-03-19 22:36:05,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:36:05,332 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 208 [2022-03-19 22:36:05,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:36:05,334 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 215 [2022-03-19 22:36:05,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:36:05,335 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 222 [2022-03-19 22:36:05,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:36:05,337 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 229 [2022-03-19 22:36:05,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:36:05,341 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 236 [2022-03-19 22:36:05,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:36:05,343 INFO L134 CoverageAnalysis]: Checked inductivity of 3423 backedges. 1220 proven. 579 refuted. 0 times theorem prover too weak. 1624 trivial. 0 not checked. [2022-03-19 22:36:05,343 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 22:36:05,343 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1235627876] [2022-03-19 22:36:05,344 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1235627876] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 22:36:05,344 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [626135000] [2022-03-19 22:36:05,344 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-19 22:36:05,344 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 22:36:05,344 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 22:36:05,345 INFO L229 MonitoredProcess]: Starting monitored process 41 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 22:36:05,346 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2022-03-19 22:36:05,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:36:05,432 INFO L263 TraceCheckSpWp]: Trace formula consists of 613 conjuncts, 125 conjunts are in the unsatisfiable core [2022-03-19 22:36:05,435 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 22:36:07,533 INFO L134 CoverageAnalysis]: Checked inductivity of 3423 backedges. 58 proven. 1741 refuted. 0 times theorem prover too weak. 1624 trivial. 0 not checked. [2022-03-19 22:36:07,533 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 22:36:12,550 INFO L134 CoverageAnalysis]: Checked inductivity of 3423 backedges. 58 proven. 1741 refuted. 0 times theorem prover too weak. 1624 trivial. 0 not checked. [2022-03-19 22:36:12,551 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [626135000] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 22:36:12,551 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 22:36:12,551 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [68, 66, 66] total 162 [2022-03-19 22:36:12,551 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [642037367] [2022-03-19 22:36:12,551 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-19 22:36:12,552 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 162 states [2022-03-19 22:36:12,552 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 22:36:12,554 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 162 interpolants. [2022-03-19 22:36:12,555 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3590, Invalid=22492, Unknown=0, NotChecked=0, Total=26082 [2022-03-19 22:36:12,555 INFO L87 Difference]: Start difference. First operand 827 states and 1063 transitions. Second operand has 162 states, 161 states have (on average 1.6024844720496894) internal successors, (258), 159 states have internal predecessors, (258), 89 states have call successors, (92), 4 states have call predecessors, (92), 1 states have return successors, (88), 88 states have call predecessors, (88), 88 states have call successors, (88) [2022-03-19 22:36:33,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 22:36:33,909 INFO L93 Difference]: Finished difference Result 1047 states and 1314 transitions. [2022-03-19 22:36:33,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 135 states. [2022-03-19 22:36:33,909 INFO L78 Accepts]: Start accepts. Automaton has has 162 states, 161 states have (on average 1.6024844720496894) internal successors, (258), 159 states have internal predecessors, (258), 89 states have call successors, (92), 4 states have call predecessors, (92), 1 states have return successors, (88), 88 states have call predecessors, (88), 88 states have call successors, (88) Word has length 247 [2022-03-19 22:36:33,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 22:36:33,912 INFO L225 Difference]: With dead ends: 1047 [2022-03-19 22:36:33,912 INFO L226 Difference]: Without dead ends: 879 [2022-03-19 22:36:33,915 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 753 GetRequests, 457 SyntacticMatches, 4 SemanticMatches, 292 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22574 ImplicationChecksByTransitivity, 23.1s TimeCoverageRelationStatistics Valid=10851, Invalid=75291, Unknown=0, NotChecked=0, Total=86142 [2022-03-19 22:36:33,916 INFO L913 BasicCegarLoop]: 41 mSDtfsCounter, 863 mSDsluCounter, 372 mSDsCounter, 0 mSdLazyCounter, 14008 mSolverCounterSat, 1375 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 864 SdHoareTripleChecker+Valid, 413 SdHoareTripleChecker+Invalid, 15383 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1375 IncrementalHoareTripleChecker+Valid, 14008 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.9s IncrementalHoareTripleChecker+Time [2022-03-19 22:36:33,916 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [864 Valid, 413 Invalid, 15383 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1375 Valid, 14008 Invalid, 0 Unknown, 0 Unchecked, 4.9s Time] [2022-03-19 22:36:33,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 879 states. [2022-03-19 22:36:34,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 879 to 877. [2022-03-19 22:36:34,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 877 states, 611 states have (on average 1.0523731587561376) internal successors, (643), 622 states have internal predecessors, (643), 244 states have call successors, (244), 22 states have call predecessors, (244), 21 states have return successors, (243), 232 states have call predecessors, (243), 243 states have call successors, (243) [2022-03-19 22:36:34,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 877 states to 877 states and 1130 transitions. [2022-03-19 22:36:34,260 INFO L78 Accepts]: Start accepts. Automaton has 877 states and 1130 transitions. Word has length 247 [2022-03-19 22:36:34,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 22:36:34,260 INFO L478 AbstractCegarLoop]: Abstraction has 877 states and 1130 transitions. [2022-03-19 22:36:34,261 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 162 states, 161 states have (on average 1.6024844720496894) internal successors, (258), 159 states have internal predecessors, (258), 89 states have call successors, (92), 4 states have call predecessors, (92), 1 states have return successors, (88), 88 states have call predecessors, (88), 88 states have call successors, (88) [2022-03-19 22:36:34,261 INFO L276 IsEmpty]: Start isEmpty. Operand 877 states and 1130 transitions. [2022-03-19 22:36:34,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 256 [2022-03-19 22:36:34,263 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 22:36:34,263 INFO L499 BasicCegarLoop]: trace histogram [31, 31, 31, 31, 30, 30, 30, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 22:36:34,280 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2022-03-19 22:36:34,470 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40 [2022-03-19 22:36:34,470 INFO L403 AbstractCegarLoop]: === Iteration 42 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 22:36:34,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 22:36:34,471 INFO L85 PathProgramCache]: Analyzing trace with hash 2002101254, now seen corresponding path program 38 times [2022-03-19 22:36:34,471 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 22:36:34,471 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1666696591] [2022-03-19 22:36:34,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 22:36:34,471 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 22:36:34,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:36:36,811 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 22:36:36,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:36:36,813 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2022-03-19 22:36:36,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:36:36,815 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2022-03-19 22:36:36,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:36:36,816 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-03-19 22:36:36,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:36:36,818 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2022-03-19 22:36:36,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:36:36,819 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2022-03-19 22:36:36,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:36:36,821 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2022-03-19 22:36:36,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:36:36,822 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2022-03-19 22:36:36,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:36:36,824 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2022-03-19 22:36:36,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:36:36,825 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2022-03-19 22:36:36,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:36:36,826 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2022-03-19 22:36:36,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:36:36,828 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2022-03-19 22:36:36,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:36:36,829 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2022-03-19 22:36:36,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:36:36,831 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 125 [2022-03-19 22:36:36,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:36:36,832 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 132 [2022-03-19 22:36:36,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:36:36,834 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 139 [2022-03-19 22:36:36,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:36:36,835 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 146 [2022-03-19 22:36:36,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:36:36,837 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 153 [2022-03-19 22:36:36,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:36:36,838 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 160 [2022-03-19 22:36:36,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:36:36,840 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 167 [2022-03-19 22:36:36,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:36:36,841 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 174 [2022-03-19 22:36:36,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:36:36,843 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 181 [2022-03-19 22:36:36,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:36:36,844 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 188 [2022-03-19 22:36:36,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:36:36,846 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 195 [2022-03-19 22:36:36,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:36:36,847 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 202 [2022-03-19 22:36:36,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:36:36,849 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 209 [2022-03-19 22:36:36,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:36:36,875 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 216 [2022-03-19 22:36:36,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:36:36,877 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 223 [2022-03-19 22:36:36,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:36:36,879 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 230 [2022-03-19 22:36:36,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:36:36,881 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 237 [2022-03-19 22:36:36,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:36:36,882 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 244 [2022-03-19 22:36:36,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:36:36,886 INFO L134 CoverageAnalysis]: Checked inductivity of 3661 backedges. 1307 proven. 614 refuted. 0 times theorem prover too weak. 1740 trivial. 0 not checked. [2022-03-19 22:36:36,886 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 22:36:36,886 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1666696591] [2022-03-19 22:36:36,886 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1666696591] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 22:36:36,886 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1063238901] [2022-03-19 22:36:36,886 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 22:36:36,886 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 22:36:36,887 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 22:36:36,900 INFO L229 MonitoredProcess]: Starting monitored process 42 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 22:36:36,915 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2022-03-19 22:36:36,994 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 22:36:36,994 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 22:36:36,998 INFO L263 TraceCheckSpWp]: Trace formula consists of 632 conjuncts, 190 conjunts are in the unsatisfiable core [2022-03-19 22:36:37,001 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 22:36:40,815 INFO L134 CoverageAnalysis]: Checked inductivity of 3661 backedges. 60 proven. 1861 refuted. 0 times theorem prover too weak. 1740 trivial. 0 not checked. [2022-03-19 22:36:40,815 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 22:36:45,928 INFO L134 CoverageAnalysis]: Checked inductivity of 3661 backedges. 60 proven. 1861 refuted. 0 times theorem prover too weak. 1740 trivial. 0 not checked. [2022-03-19 22:36:45,928 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1063238901] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 22:36:45,928 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 22:36:45,929 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [70, 68, 68] total 198 [2022-03-19 22:36:45,929 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [146067260] [2022-03-19 22:36:45,929 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-19 22:36:45,929 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 198 states [2022-03-19 22:36:45,929 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 22:36:45,930 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 198 interpolants. [2022-03-19 22:36:45,932 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4901, Invalid=34105, Unknown=0, NotChecked=0, Total=39006 [2022-03-19 22:36:45,932 INFO L87 Difference]: Start difference. First operand 877 states and 1130 transitions. Second operand has 198 states, 197 states have (on average 1.5076142131979695) internal successors, (297), 195 states have internal predecessors, (297), 92 states have call successors, (95), 4 states have call predecessors, (95), 1 states have return successors, (91), 91 states have call predecessors, (91), 91 states have call successors, (91) [2022-03-19 22:37:08,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 22:37:08,281 INFO L93 Difference]: Finished difference Result 1145 states and 1443 transitions. [2022-03-19 22:37:08,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 139 states. [2022-03-19 22:37:08,282 INFO L78 Accepts]: Start accepts. Automaton has has 198 states, 197 states have (on average 1.5076142131979695) internal successors, (297), 195 states have internal predecessors, (297), 92 states have call successors, (95), 4 states have call predecessors, (95), 1 states have return successors, (91), 91 states have call predecessors, (91), 91 states have call successors, (91) Word has length 255 [2022-03-19 22:37:08,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 22:37:08,285 INFO L225 Difference]: With dead ends: 1145 [2022-03-19 22:37:08,285 INFO L226 Difference]: Without dead ends: 974 [2022-03-19 22:37:08,289 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 777 GetRequests, 442 SyntacticMatches, 3 SemanticMatches, 332 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33277 ImplicationChecksByTransitivity, 25.6s TimeCoverageRelationStatistics Valid=12635, Invalid=98587, Unknown=0, NotChecked=0, Total=111222 [2022-03-19 22:37:08,289 INFO L913 BasicCegarLoop]: 42 mSDtfsCounter, 915 mSDsluCounter, 357 mSDsCounter, 0 mSdLazyCounter, 14965 mSolverCounterSat, 1516 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 916 SdHoareTripleChecker+Valid, 399 SdHoareTripleChecker+Invalid, 16481 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1516 IncrementalHoareTripleChecker+Valid, 14965 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.0s IncrementalHoareTripleChecker+Time [2022-03-19 22:37:08,289 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [916 Valid, 399 Invalid, 16481 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1516 Valid, 14965 Invalid, 0 Unknown, 0 Unchecked, 5.0s Time] [2022-03-19 22:37:08,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 974 states. [2022-03-19 22:37:08,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 974 to 973. [2022-03-19 22:37:08,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 973 states, 676 states have (on average 1.0488165680473374) internal successors, (709), 687 states have internal predecessors, (709), 274 states have call successors, (274), 23 states have call predecessors, (274), 22 states have return successors, (273), 262 states have call predecessors, (273), 273 states have call successors, (273) [2022-03-19 22:37:08,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 973 states to 973 states and 1256 transitions. [2022-03-19 22:37:08,692 INFO L78 Accepts]: Start accepts. Automaton has 973 states and 1256 transitions. Word has length 255 [2022-03-19 22:37:08,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 22:37:08,692 INFO L478 AbstractCegarLoop]: Abstraction has 973 states and 1256 transitions. [2022-03-19 22:37:08,692 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 198 states, 197 states have (on average 1.5076142131979695) internal successors, (297), 195 states have internal predecessors, (297), 92 states have call successors, (95), 4 states have call predecessors, (95), 1 states have return successors, (91), 91 states have call predecessors, (91), 91 states have call successors, (91) [2022-03-19 22:37:08,692 INFO L276 IsEmpty]: Start isEmpty. Operand 973 states and 1256 transitions. [2022-03-19 22:37:08,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 264 [2022-03-19 22:37:08,695 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 22:37:08,695 INFO L499 BasicCegarLoop]: trace histogram [32, 32, 32, 32, 31, 31, 31, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 22:37:08,711 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Ended with exit code 0 [2022-03-19 22:37:08,911 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,42 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 22:37:08,911 INFO L403 AbstractCegarLoop]: === Iteration 43 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 22:37:08,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 22:37:08,911 INFO L85 PathProgramCache]: Analyzing trace with hash -1498343835, now seen corresponding path program 39 times [2022-03-19 22:37:08,911 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 22:37:08,911 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [368723203] [2022-03-19 22:37:08,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 22:37:08,911 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 22:37:08,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:37:11,124 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 22:37:11,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:37:11,126 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2022-03-19 22:37:11,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:37:11,127 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2022-03-19 22:37:11,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:37:11,128 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2022-03-19 22:37:11,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:37:11,130 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2022-03-19 22:37:11,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:37:11,131 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2022-03-19 22:37:11,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:37:11,132 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2022-03-19 22:37:11,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:37:11,134 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2022-03-19 22:37:11,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:37:11,135 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2022-03-19 22:37:11,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:37:11,136 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2022-03-19 22:37:11,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:37:11,138 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2022-03-19 22:37:11,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:37:11,139 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 112 [2022-03-19 22:37:11,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:37:11,140 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 119 [2022-03-19 22:37:11,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:37:11,141 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 126 [2022-03-19 22:37:11,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:37:11,143 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 133 [2022-03-19 22:37:11,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:37:11,144 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 140 [2022-03-19 22:37:11,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:37:11,145 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 147 [2022-03-19 22:37:11,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:37:11,147 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 154 [2022-03-19 22:37:11,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:37:11,148 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 161 [2022-03-19 22:37:11,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:37:11,150 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 168 [2022-03-19 22:37:11,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:37:11,152 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 175 [2022-03-19 22:37:11,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:37:11,153 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 182 [2022-03-19 22:37:11,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:37:11,172 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 189 [2022-03-19 22:37:11,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:37:11,174 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 196 [2022-03-19 22:37:11,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:37:11,175 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 203 [2022-03-19 22:37:11,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:37:11,176 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 210 [2022-03-19 22:37:11,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:37:11,177 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 217 [2022-03-19 22:37:11,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:37:11,179 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 224 [2022-03-19 22:37:11,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:37:11,180 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 231 [2022-03-19 22:37:11,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:37:11,181 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 238 [2022-03-19 22:37:11,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:37:11,183 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 245 [2022-03-19 22:37:11,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:37:11,184 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 252 [2022-03-19 22:37:11,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:37:11,190 INFO L134 CoverageAnalysis]: Checked inductivity of 3907 backedges. 1397 proven. 650 refuted. 0 times theorem prover too weak. 1860 trivial. 0 not checked. [2022-03-19 22:37:11,190 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 22:37:11,190 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [368723203] [2022-03-19 22:37:11,190 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [368723203] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 22:37:11,190 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1047226052] [2022-03-19 22:37:11,190 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-19 22:37:11,191 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 22:37:11,191 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 22:37:11,192 INFO L229 MonitoredProcess]: Starting monitored process 43 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 22:37:11,196 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2022-03-19 22:37:11,312 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 32 check-sat command(s) [2022-03-19 22:37:11,312 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 22:37:11,315 INFO L263 TraceCheckSpWp]: Trace formula consists of 651 conjuncts, 102 conjunts are in the unsatisfiable core [2022-03-19 22:37:11,318 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 22:37:14,998 INFO L134 CoverageAnalysis]: Checked inductivity of 3907 backedges. 62 proven. 1985 refuted. 0 times theorem prover too weak. 1860 trivial. 0 not checked. [2022-03-19 22:37:14,998 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 22:37:21,850 INFO L134 CoverageAnalysis]: Checked inductivity of 3907 backedges. 62 proven. 1985 refuted. 0 times theorem prover too weak. 1860 trivial. 0 not checked. [2022-03-19 22:37:21,850 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1047226052] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 22:37:21,850 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 22:37:21,850 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [72, 70, 70] total 204 [2022-03-19 22:37:21,850 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [214044722] [2022-03-19 22:37:21,850 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-19 22:37:21,851 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 204 states [2022-03-19 22:37:21,851 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 22:37:21,853 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 204 interpolants. [2022-03-19 22:37:21,855 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4614, Invalid=36798, Unknown=0, NotChecked=0, Total=41412 [2022-03-19 22:37:21,855 INFO L87 Difference]: Start difference. First operand 973 states and 1256 transitions. Second operand has 204 states, 203 states have (on average 1.5073891625615763) internal successors, (306), 201 states have internal predecessors, (306), 95 states have call successors, (98), 4 states have call predecessors, (98), 1 states have return successors, (94), 94 states have call predecessors, (94), 94 states have call successors, (94) [2022-03-19 22:37:43,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 22:37:43,655 INFO L93 Difference]: Finished difference Result 1107 states and 1389 transitions. [2022-03-19 22:37:43,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 108 states. [2022-03-19 22:37:43,655 INFO L78 Accepts]: Start accepts. Automaton has has 204 states, 203 states have (on average 1.5073891625615763) internal successors, (306), 201 states have internal predecessors, (306), 95 states have call successors, (98), 4 states have call predecessors, (98), 1 states have return successors, (94), 94 states have call predecessors, (94), 94 states have call successors, (94) Word has length 263 [2022-03-19 22:37:43,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 22:37:43,658 INFO L225 Difference]: With dead ends: 1107 [2022-03-19 22:37:43,658 INFO L226 Difference]: Without dead ends: 925 [2022-03-19 22:37:43,663 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 766 GetRequests, 456 SyntacticMatches, 3 SemanticMatches, 307 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24732 ImplicationChecksByTransitivity, 29.2s TimeCoverageRelationStatistics Valid=9977, Invalid=85195, Unknown=0, NotChecked=0, Total=95172 [2022-03-19 22:37:43,668 INFO L913 BasicCegarLoop]: 43 mSDtfsCounter, 144 mSDsluCounter, 257 mSDsCounter, 0 mSdLazyCounter, 7390 mSolverCounterSat, 692 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 145 SdHoareTripleChecker+Valid, 300 SdHoareTripleChecker+Invalid, 8082 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 692 IncrementalHoareTripleChecker+Valid, 7390 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2022-03-19 22:37:43,668 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [145 Valid, 300 Invalid, 8082 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [692 Valid, 7390 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2022-03-19 22:37:43,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 925 states. [2022-03-19 22:37:44,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 925 to 924. [2022-03-19 22:37:44,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 924 states, 643 states have (on average 1.0497667185069985) internal successors, (675), 654 states have internal predecessors, (675), 259 states have call successors, (259), 22 states have call predecessors, (259), 21 states have return successors, (258), 247 states have call predecessors, (258), 258 states have call successors, (258) [2022-03-19 22:37:44,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 924 states to 924 states and 1192 transitions. [2022-03-19 22:37:44,042 INFO L78 Accepts]: Start accepts. Automaton has 924 states and 1192 transitions. Word has length 263 [2022-03-19 22:37:44,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 22:37:44,043 INFO L478 AbstractCegarLoop]: Abstraction has 924 states and 1192 transitions. [2022-03-19 22:37:44,043 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 204 states, 203 states have (on average 1.5073891625615763) internal successors, (306), 201 states have internal predecessors, (306), 95 states have call successors, (98), 4 states have call predecessors, (98), 1 states have return successors, (94), 94 states have call predecessors, (94), 94 states have call successors, (94) [2022-03-19 22:37:44,043 INFO L276 IsEmpty]: Start isEmpty. Operand 924 states and 1192 transitions. [2022-03-19 22:37:44,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 265 [2022-03-19 22:37:44,046 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 22:37:44,046 INFO L499 BasicCegarLoop]: trace histogram [33, 32, 32, 32, 31, 31, 31, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 22:37:44,063 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Forceful destruction successful, exit code 0 [2022-03-19 22:37:44,263 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,43 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 22:37:44,263 INFO L403 AbstractCegarLoop]: === Iteration 44 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 22:37:44,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 22:37:44,263 INFO L85 PathProgramCache]: Analyzing trace with hash -1812752847, now seen corresponding path program 40 times [2022-03-19 22:37:44,264 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 22:37:44,264 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [44818707] [2022-03-19 22:37:44,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 22:37:44,264 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 22:37:44,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:37:45,512 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 22:37:45,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:37:45,514 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-03-19 22:37:45,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:37:45,515 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2022-03-19 22:37:45,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:37:45,516 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2022-03-19 22:37:45,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:37:45,517 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2022-03-19 22:37:45,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:37:45,518 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2022-03-19 22:37:45,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:37:45,519 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2022-03-19 22:37:45,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:37:45,520 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2022-03-19 22:37:45,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:37:45,521 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2022-03-19 22:37:45,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:37:45,522 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 99 [2022-03-19 22:37:45,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:37:45,523 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 106 [2022-03-19 22:37:45,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:37:45,523 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 113 [2022-03-19 22:37:45,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:37:45,524 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 120 [2022-03-19 22:37:45,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:37:45,525 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 127 [2022-03-19 22:37:45,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:37:45,526 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 134 [2022-03-19 22:37:45,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:37:45,527 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 141 [2022-03-19 22:37:45,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:37:45,528 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 148 [2022-03-19 22:37:45,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:37:45,529 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 155 [2022-03-19 22:37:45,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:37:45,530 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 162 [2022-03-19 22:37:45,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:37:45,540 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 169 [2022-03-19 22:37:45,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:37:45,542 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 176 [2022-03-19 22:37:45,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:37:45,543 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 183 [2022-03-19 22:37:45,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:37:45,545 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 190 [2022-03-19 22:37:45,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:37:45,546 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 197 [2022-03-19 22:37:45,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:37:45,548 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 204 [2022-03-19 22:37:45,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:37:45,549 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 211 [2022-03-19 22:37:45,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:37:45,550 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 218 [2022-03-19 22:37:45,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:37:45,551 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 225 [2022-03-19 22:37:45,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:37:45,553 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 232 [2022-03-19 22:37:45,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:37:45,554 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 239 [2022-03-19 22:37:45,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:37:45,555 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 246 [2022-03-19 22:37:45,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:37:45,556 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 253 [2022-03-19 22:37:45,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:37:45,558 INFO L134 CoverageAnalysis]: Checked inductivity of 3940 backedges. 558 proven. 1522 refuted. 0 times theorem prover too weak. 1860 trivial. 0 not checked. [2022-03-19 22:37:45,558 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 22:37:45,558 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [44818707] [2022-03-19 22:37:45,558 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [44818707] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 22:37:45,558 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1838314955] [2022-03-19 22:37:45,558 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 22:37:45,558 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 22:37:45,559 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 22:37:45,560 INFO L229 MonitoredProcess]: Starting monitored process 44 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 22:37:45,561 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2022-03-19 22:37:45,650 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 22:37:45,651 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 22:37:45,654 INFO L263 TraceCheckSpWp]: Trace formula consists of 656 conjuncts, 102 conjunts are in the unsatisfiable core [2022-03-19 22:37:45,656 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 22:37:47,552 INFO L134 CoverageAnalysis]: Checked inductivity of 3940 backedges. 62 proven. 2018 refuted. 0 times theorem prover too weak. 1860 trivial. 0 not checked. [2022-03-19 22:37:47,552 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 22:37:49,307 INFO L134 CoverageAnalysis]: Checked inductivity of 3940 backedges. 62 proven. 2018 refuted. 0 times theorem prover too weak. 1860 trivial. 0 not checked. [2022-03-19 22:37:49,307 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1838314955] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 22:37:49,307 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 22:37:49,307 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [70, 69, 69] total 138 [2022-03-19 22:37:49,307 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1367511548] [2022-03-19 22:37:49,307 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-19 22:37:49,308 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 138 states [2022-03-19 22:37:49,308 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 22:37:49,308 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 138 interpolants. [2022-03-19 22:37:49,309 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2918, Invalid=15988, Unknown=0, NotChecked=0, Total=18906 [2022-03-19 22:37:49,309 INFO L87 Difference]: Start difference. First operand 924 states and 1192 transitions. Second operand has 138 states, 138 states have (on average 1.2971014492753623) internal successors, (179), 135 states have internal predecessors, (179), 33 states have call successors, (36), 4 states have call predecessors, (36), 1 states have return successors, (32), 32 states have call predecessors, (32), 32 states have call successors, (32) [2022-03-19 22:37:52,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 22:37:52,466 INFO L93 Difference]: Finished difference Result 949 states and 1222 transitions. [2022-03-19 22:37:52,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2022-03-19 22:37:52,467 INFO L78 Accepts]: Start accepts. Automaton has has 138 states, 138 states have (on average 1.2971014492753623) internal successors, (179), 135 states have internal predecessors, (179), 33 states have call successors, (36), 4 states have call predecessors, (36), 1 states have return successors, (32), 32 states have call predecessors, (32), 32 states have call successors, (32) Word has length 264 [2022-03-19 22:37:52,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 22:37:52,470 INFO L225 Difference]: With dead ends: 949 [2022-03-19 22:37:52,470 INFO L226 Difference]: Without dead ends: 947 [2022-03-19 22:37:52,472 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 730 GetRequests, 522 SyntacticMatches, 3 SemanticMatches, 205 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12178 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=7427, Invalid=35215, Unknown=0, NotChecked=0, Total=42642 [2022-03-19 22:37:52,474 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 329 mSDsluCounter, 212 mSDsCounter, 0 mSdLazyCounter, 3549 mSolverCounterSat, 798 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 330 SdHoareTripleChecker+Valid, 224 SdHoareTripleChecker+Invalid, 4347 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 798 IncrementalHoareTripleChecker+Valid, 3549 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-03-19 22:37:52,474 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [330 Valid, 224 Invalid, 4347 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [798 Valid, 3549 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-03-19 22:37:52,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 947 states. [2022-03-19 22:37:52,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 947 to 943. [2022-03-19 22:37:52,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 943 states, 656 states have (on average 1.048780487804878) internal successors, (688), 667 states have internal predecessors, (688), 264 states have call successors, (264), 23 states have call predecessors, (264), 22 states have return successors, (263), 252 states have call predecessors, (263), 263 states have call successors, (263) [2022-03-19 22:37:52,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 943 states to 943 states and 1215 transitions. [2022-03-19 22:37:52,870 INFO L78 Accepts]: Start accepts. Automaton has 943 states and 1215 transitions. Word has length 264 [2022-03-19 22:37:52,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 22:37:52,870 INFO L478 AbstractCegarLoop]: Abstraction has 943 states and 1215 transitions. [2022-03-19 22:37:52,870 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 138 states, 138 states have (on average 1.2971014492753623) internal successors, (179), 135 states have internal predecessors, (179), 33 states have call successors, (36), 4 states have call predecessors, (36), 1 states have return successors, (32), 32 states have call predecessors, (32), 32 states have call successors, (32) [2022-03-19 22:37:52,870 INFO L276 IsEmpty]: Start isEmpty. Operand 943 states and 1215 transitions. [2022-03-19 22:37:52,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 272 [2022-03-19 22:37:52,873 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 22:37:52,873 INFO L499 BasicCegarLoop]: trace histogram [33, 33, 33, 33, 32, 32, 32, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 22:37:52,889 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Forceful destruction successful, exit code 0 [2022-03-19 22:37:53,086 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2022-03-19 22:37:53,086 INFO L403 AbstractCegarLoop]: === Iteration 45 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 22:37:53,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 22:37:53,086 INFO L85 PathProgramCache]: Analyzing trace with hash 1391007526, now seen corresponding path program 41 times [2022-03-19 22:37:53,086 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 22:37:53,086 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1390919105] [2022-03-19 22:37:53,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 22:37:53,086 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 22:37:53,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:37:55,162 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 22:37:55,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:37:55,164 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-03-19 22:37:55,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:37:55,166 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2022-03-19 22:37:55,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:37:55,168 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2022-03-19 22:37:55,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:37:55,189 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2022-03-19 22:37:55,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:37:55,191 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2022-03-19 22:37:55,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:37:55,192 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2022-03-19 22:37:55,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:37:55,194 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2022-03-19 22:37:55,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:37:55,196 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2022-03-19 22:37:55,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:37:55,197 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 99 [2022-03-19 22:37:55,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:37:55,199 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 106 [2022-03-19 22:37:55,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:37:55,200 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 113 [2022-03-19 22:37:55,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:37:55,202 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 120 [2022-03-19 22:37:55,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:37:55,203 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 127 [2022-03-19 22:37:55,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:37:55,205 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 134 [2022-03-19 22:37:55,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:37:55,206 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 141 [2022-03-19 22:37:55,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:37:55,208 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 148 [2022-03-19 22:37:55,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:37:55,209 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 155 [2022-03-19 22:37:55,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:37:55,212 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 162 [2022-03-19 22:37:55,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:37:55,213 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 169 [2022-03-19 22:37:55,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:37:55,215 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 176 [2022-03-19 22:37:55,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:37:55,216 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 183 [2022-03-19 22:37:55,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:37:55,218 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 190 [2022-03-19 22:37:55,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:37:55,219 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 197 [2022-03-19 22:37:55,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:37:55,221 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 204 [2022-03-19 22:37:55,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:37:55,222 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 211 [2022-03-19 22:37:55,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:37:55,224 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 218 [2022-03-19 22:37:55,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:37:55,225 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 225 [2022-03-19 22:37:55,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:37:55,227 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 232 [2022-03-19 22:37:55,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:37:55,228 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 239 [2022-03-19 22:37:55,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:37:55,230 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 246 [2022-03-19 22:37:55,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:37:55,231 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 253 [2022-03-19 22:37:55,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:37:55,233 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 260 [2022-03-19 22:37:55,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:37:55,236 INFO L134 CoverageAnalysis]: Checked inductivity of 4161 backedges. 1490 proven. 687 refuted. 0 times theorem prover too weak. 1984 trivial. 0 not checked. [2022-03-19 22:37:55,236 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 22:37:55,236 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1390919105] [2022-03-19 22:37:55,236 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1390919105] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 22:37:55,236 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1885407615] [2022-03-19 22:37:55,236 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-19 22:37:55,236 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 22:37:55,236 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 22:37:55,237 INFO L229 MonitoredProcess]: Starting monitored process 45 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 22:37:55,238 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2022-03-19 22:37:55,354 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 33 check-sat command(s) [2022-03-19 22:37:55,355 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 22:37:55,358 INFO L263 TraceCheckSpWp]: Trace formula consists of 670 conjuncts, 137 conjunts are in the unsatisfiable core [2022-03-19 22:37:55,361 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 22:37:58,439 INFO L134 CoverageAnalysis]: Checked inductivity of 4161 backedges. 64 proven. 2113 refuted. 0 times theorem prover too weak. 1984 trivial. 0 not checked. [2022-03-19 22:37:58,439 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 22:38:05,906 INFO L134 CoverageAnalysis]: Checked inductivity of 4161 backedges. 64 proven. 2113 refuted. 0 times theorem prover too weak. 1984 trivial. 0 not checked. [2022-03-19 22:38:05,907 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1885407615] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 22:38:05,907 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 22:38:05,907 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [74, 72, 72] total 177 [2022-03-19 22:38:05,907 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [233322042] [2022-03-19 22:38:05,907 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-19 22:38:05,908 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 177 states [2022-03-19 22:38:05,908 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 22:38:05,908 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 177 interpolants. [2022-03-19 22:38:05,910 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4292, Invalid=26860, Unknown=0, NotChecked=0, Total=31152 [2022-03-19 22:38:05,911 INFO L87 Difference]: Start difference. First operand 943 states and 1215 transitions. Second operand has 177 states, 176 states have (on average 1.6022727272727273) internal successors, (282), 174 states have internal predecessors, (282), 98 states have call successors, (101), 4 states have call predecessors, (101), 1 states have return successors, (97), 97 states have call predecessors, (97), 97 states have call successors, (97) [2022-03-19 22:38:32,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 22:38:32,834 INFO L93 Difference]: Finished difference Result 1233 states and 1556 transitions. [2022-03-19 22:38:32,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 147 states. [2022-03-19 22:38:32,835 INFO L78 Accepts]: Start accepts. Automaton has has 177 states, 176 states have (on average 1.6022727272727273) internal successors, (282), 174 states have internal predecessors, (282), 98 states have call successors, (101), 4 states have call predecessors, (101), 1 states have return successors, (97), 97 states have call predecessors, (97), 97 states have call successors, (97) Word has length 271 [2022-03-19 22:38:32,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 22:38:32,838 INFO L225 Difference]: With dead ends: 1233 [2022-03-19 22:38:32,838 INFO L226 Difference]: Without dead ends: 1052 [2022-03-19 22:38:32,842 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 825 GetRequests, 502 SyntacticMatches, 4 SemanticMatches, 319 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26597 ImplicationChecksByTransitivity, 29.6s TimeCoverageRelationStatistics Valid=12915, Invalid=89805, Unknown=0, NotChecked=0, Total=102720 [2022-03-19 22:38:32,844 INFO L913 BasicCegarLoop]: 44 mSDtfsCounter, 1005 mSDsluCounter, 367 mSDsCounter, 0 mSdLazyCounter, 15651 mSolverCounterSat, 1611 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1006 SdHoareTripleChecker+Valid, 411 SdHoareTripleChecker+Invalid, 17262 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1611 IncrementalHoareTripleChecker+Valid, 15651 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.9s IncrementalHoareTripleChecker+Time [2022-03-19 22:38:32,844 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [1006 Valid, 411 Invalid, 17262 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1611 Valid, 15651 Invalid, 0 Unknown, 0 Unchecked, 5.9s Time] [2022-03-19 22:38:32,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1052 states. [2022-03-19 22:38:33,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1052 to 1050. [2022-03-19 22:38:33,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1050 states, 729 states have (on average 1.0480109739369) internal successors, (764), 741 states have internal predecessors, (764), 297 states have call successors, (297), 24 states have call predecessors, (297), 23 states have return successors, (296), 284 states have call predecessors, (296), 296 states have call successors, (296) [2022-03-19 22:38:33,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1050 states to 1050 states and 1357 transitions. [2022-03-19 22:38:33,300 INFO L78 Accepts]: Start accepts. Automaton has 1050 states and 1357 transitions. Word has length 271 [2022-03-19 22:38:33,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 22:38:33,300 INFO L478 AbstractCegarLoop]: Abstraction has 1050 states and 1357 transitions. [2022-03-19 22:38:33,301 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 177 states, 176 states have (on average 1.6022727272727273) internal successors, (282), 174 states have internal predecessors, (282), 98 states have call successors, (101), 4 states have call predecessors, (101), 1 states have return successors, (97), 97 states have call predecessors, (97), 97 states have call successors, (97) [2022-03-19 22:38:33,301 INFO L276 IsEmpty]: Start isEmpty. Operand 1050 states and 1357 transitions. [2022-03-19 22:38:33,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 280 [2022-03-19 22:38:33,304 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 22:38:33,304 INFO L499 BasicCegarLoop]: trace histogram [34, 34, 34, 34, 33, 33, 33, 33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 22:38:33,323 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Forceful destruction successful, exit code 0 [2022-03-19 22:38:33,520 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2022-03-19 22:38:33,521 INFO L403 AbstractCegarLoop]: === Iteration 46 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 22:38:33,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 22:38:33,521 INFO L85 PathProgramCache]: Analyzing trace with hash -1961887931, now seen corresponding path program 42 times [2022-03-19 22:38:33,521 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 22:38:33,521 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1103951918] [2022-03-19 22:38:33,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 22:38:33,521 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 22:38:33,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:38:36,615 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 22:38:36,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:38:36,617 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2022-03-19 22:38:36,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:38:36,619 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2022-03-19 22:38:36,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:38:36,621 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2022-03-19 22:38:36,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:38:36,622 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2022-03-19 22:38:36,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:38:36,624 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2022-03-19 22:38:36,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:38:36,625 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2022-03-19 22:38:36,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:38:36,627 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2022-03-19 22:38:36,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:38:36,628 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2022-03-19 22:38:36,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:38:36,630 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2022-03-19 22:38:36,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:38:36,631 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 107 [2022-03-19 22:38:36,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:38:36,633 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2022-03-19 22:38:36,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:38:36,634 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 121 [2022-03-19 22:38:36,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:38:36,636 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 128 [2022-03-19 22:38:36,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:38:36,638 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 135 [2022-03-19 22:38:36,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:38:36,639 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 142 [2022-03-19 22:38:36,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:38:36,641 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 149 [2022-03-19 22:38:36,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:38:36,643 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 156 [2022-03-19 22:38:36,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:38:36,644 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 163 [2022-03-19 22:38:36,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:38:36,646 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 170 [2022-03-19 22:38:36,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:38:36,647 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 177 [2022-03-19 22:38:36,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:38:36,649 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 184 [2022-03-19 22:38:36,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:38:36,650 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 191 [2022-03-19 22:38:36,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:38:36,652 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 198 [2022-03-19 22:38:36,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:38:36,653 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 205 [2022-03-19 22:38:36,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:38:36,655 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 212 [2022-03-19 22:38:36,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:38:36,656 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 219 [2022-03-19 22:38:36,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:38:36,658 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 226 [2022-03-19 22:38:36,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:38:36,659 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 233 [2022-03-19 22:38:36,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:38:36,661 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 240 [2022-03-19 22:38:36,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:38:36,662 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 247 [2022-03-19 22:38:36,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:38:36,664 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 254 [2022-03-19 22:38:36,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:38:36,665 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 261 [2022-03-19 22:38:36,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:38:36,667 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 268 [2022-03-19 22:38:36,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:38:36,669 INFO L134 CoverageAnalysis]: Checked inductivity of 4423 backedges. 1586 proven. 725 refuted. 0 times theorem prover too weak. 2112 trivial. 0 not checked. [2022-03-19 22:38:36,669 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 22:38:36,669 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1103951918] [2022-03-19 22:38:36,669 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1103951918] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 22:38:36,669 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1186599671] [2022-03-19 22:38:36,669 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-19 22:38:36,669 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 22:38:36,669 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 22:38:36,670 INFO L229 MonitoredProcess]: Starting monitored process 46 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 22:38:36,671 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2022-03-19 22:38:36,793 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 34 check-sat command(s) [2022-03-19 22:38:36,793 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 22:38:36,796 INFO L263 TraceCheckSpWp]: Trace formula consists of 689 conjuncts, 108 conjunts are in the unsatisfiable core [2022-03-19 22:38:36,799 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 22:38:41,872 INFO L134 CoverageAnalysis]: Checked inductivity of 4423 backedges. 66 proven. 2245 refuted. 0 times theorem prover too weak. 2112 trivial. 0 not checked. [2022-03-19 22:38:41,872 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 22:38:47,854 INFO L134 CoverageAnalysis]: Checked inductivity of 4423 backedges. 66 proven. 2245 refuted. 0 times theorem prover too weak. 2112 trivial. 0 not checked. [2022-03-19 22:38:47,854 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1186599671] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 22:38:47,854 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 22:38:47,854 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [76, 74, 74] total 216 [2022-03-19 22:38:47,854 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1229260061] [2022-03-19 22:38:47,854 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-19 22:38:47,855 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 216 states [2022-03-19 22:38:47,855 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 22:38:47,855 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 216 interpolants. [2022-03-19 22:38:47,857 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5172, Invalid=41268, Unknown=0, NotChecked=0, Total=46440 [2022-03-19 22:38:47,858 INFO L87 Difference]: Start difference. First operand 1050 states and 1357 transitions. Second operand has 216 states, 215 states have (on average 1.5069767441860464) internal successors, (324), 213 states have internal predecessors, (324), 101 states have call successors, (104), 4 states have call predecessors, (104), 1 states have return successors, (100), 100 states have call predecessors, (100), 100 states have call successors, (100) [2022-03-19 22:39:17,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 22:39:17,508 INFO L93 Difference]: Finished difference Result 1243 states and 1564 transitions. [2022-03-19 22:39:17,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 114 states. [2022-03-19 22:39:17,508 INFO L78 Accepts]: Start accepts. Automaton has has 216 states, 215 states have (on average 1.5069767441860464) internal successors, (324), 213 states have internal predecessors, (324), 101 states have call successors, (104), 4 states have call predecessors, (104), 1 states have return successors, (100), 100 states have call predecessors, (100), 100 states have call successors, (100) Word has length 279 [2022-03-19 22:39:17,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 22:39:17,511 INFO L225 Difference]: With dead ends: 1243 [2022-03-19 22:39:17,511 INFO L226 Difference]: Without dead ends: 1051 [2022-03-19 22:39:17,516 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 812 GetRequests, 484 SyntacticMatches, 3 SemanticMatches, 325 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27737 ImplicationChecksByTransitivity, 37.6s TimeCoverageRelationStatistics Valid=11172, Invalid=95430, Unknown=0, NotChecked=0, Total=106602 [2022-03-19 22:39:17,519 INFO L913 BasicCegarLoop]: 45 mSDtfsCounter, 168 mSDsluCounter, 262 mSDsCounter, 0 mSdLazyCounter, 8145 mSolverCounterSat, 839 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 169 SdHoareTripleChecker+Valid, 307 SdHoareTripleChecker+Invalid, 8984 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 839 IncrementalHoareTripleChecker+Valid, 8145 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.3s IncrementalHoareTripleChecker+Time [2022-03-19 22:39:17,519 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [169 Valid, 307 Invalid, 8984 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [839 Valid, 8145 Invalid, 0 Unknown, 0 Unchecked, 3.3s Time] [2022-03-19 22:39:17,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1051 states. [2022-03-19 22:39:17,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1051 to 1050. [2022-03-19 22:39:17,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1050 states, 729 states have (on average 1.046639231824417) internal successors, (763), 741 states have internal predecessors, (763), 297 states have call successors, (297), 24 states have call predecessors, (297), 23 states have return successors, (296), 284 states have call predecessors, (296), 296 states have call successors, (296) [2022-03-19 22:39:17,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1050 states to 1050 states and 1356 transitions. [2022-03-19 22:39:17,972 INFO L78 Accepts]: Start accepts. Automaton has 1050 states and 1356 transitions. Word has length 279 [2022-03-19 22:39:17,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 22:39:17,972 INFO L478 AbstractCegarLoop]: Abstraction has 1050 states and 1356 transitions. [2022-03-19 22:39:17,973 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 216 states, 215 states have (on average 1.5069767441860464) internal successors, (324), 213 states have internal predecessors, (324), 101 states have call successors, (104), 4 states have call predecessors, (104), 1 states have return successors, (100), 100 states have call predecessors, (100), 100 states have call successors, (100) [2022-03-19 22:39:17,973 INFO L276 IsEmpty]: Start isEmpty. Operand 1050 states and 1356 transitions. [2022-03-19 22:39:17,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 281 [2022-03-19 22:39:17,975 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 22:39:17,976 INFO L499 BasicCegarLoop]: trace histogram [35, 34, 34, 34, 33, 33, 33, 33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 22:39:17,992 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Forceful destruction successful, exit code 0 [2022-03-19 22:39:18,192 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2022-03-19 22:39:18,192 INFO L403 AbstractCegarLoop]: === Iteration 47 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 22:39:18,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 22:39:18,193 INFO L85 PathProgramCache]: Analyzing trace with hash 1087463185, now seen corresponding path program 43 times [2022-03-19 22:39:18,193 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 22:39:18,193 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [859680989] [2022-03-19 22:39:18,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 22:39:18,193 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 22:39:18,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:39:19,569 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 22:39:19,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:39:19,571 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2022-03-19 22:39:19,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:39:19,572 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2022-03-19 22:39:19,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:39:19,573 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2022-03-19 22:39:19,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:39:19,574 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2022-03-19 22:39:19,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:39:19,575 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2022-03-19 22:39:19,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:39:19,576 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2022-03-19 22:39:19,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:39:19,577 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2022-03-19 22:39:19,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:39:19,578 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2022-03-19 22:39:19,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:39:19,579 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2022-03-19 22:39:19,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:39:19,582 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 108 [2022-03-19 22:39:19,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:39:19,583 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 115 [2022-03-19 22:39:19,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:39:19,584 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 122 [2022-03-19 22:39:19,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:39:19,585 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 129 [2022-03-19 22:39:19,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:39:19,589 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 136 [2022-03-19 22:39:19,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:39:19,590 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 143 [2022-03-19 22:39:19,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:39:19,591 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 150 [2022-03-19 22:39:19,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:39:19,592 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 157 [2022-03-19 22:39:19,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:39:19,596 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 164 [2022-03-19 22:39:19,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:39:19,597 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 171 [2022-03-19 22:39:19,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:39:19,598 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 178 [2022-03-19 22:39:19,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:39:19,599 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 185 [2022-03-19 22:39:19,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:39:19,600 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 192 [2022-03-19 22:39:19,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:39:19,601 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 199 [2022-03-19 22:39:19,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:39:19,602 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 206 [2022-03-19 22:39:19,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:39:19,603 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 213 [2022-03-19 22:39:19,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:39:19,604 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 220 [2022-03-19 22:39:19,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:39:19,605 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 227 [2022-03-19 22:39:19,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:39:19,606 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 234 [2022-03-19 22:39:19,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:39:19,607 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 241 [2022-03-19 22:39:19,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:39:19,608 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 248 [2022-03-19 22:39:19,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:39:19,609 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 255 [2022-03-19 22:39:19,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:39:19,610 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 262 [2022-03-19 22:39:19,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:39:19,611 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 269 [2022-03-19 22:39:19,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:39:19,613 INFO L134 CoverageAnalysis]: Checked inductivity of 4458 backedges. 627 proven. 1719 refuted. 0 times theorem prover too weak. 2112 trivial. 0 not checked. [2022-03-19 22:39:19,613 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 22:39:19,613 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [859680989] [2022-03-19 22:39:19,613 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [859680989] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 22:39:19,613 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2060925712] [2022-03-19 22:39:19,613 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-19 22:39:19,613 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 22:39:19,613 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 22:39:19,614 INFO L229 MonitoredProcess]: Starting monitored process 47 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 22:39:19,615 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2022-03-19 22:39:19,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:39:19,720 INFO L263 TraceCheckSpWp]: Trace formula consists of 694 conjuncts, 108 conjunts are in the unsatisfiable core [2022-03-19 22:39:19,723 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 22:39:21,067 INFO L134 CoverageAnalysis]: Checked inductivity of 4458 backedges. 66 proven. 2280 refuted. 0 times theorem prover too weak. 2112 trivial. 0 not checked. [2022-03-19 22:39:21,068 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 22:39:22,336 INFO L134 CoverageAnalysis]: Checked inductivity of 4458 backedges. 66 proven. 2280 refuted. 0 times theorem prover too weak. 2112 trivial. 0 not checked. [2022-03-19 22:39:22,337 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2060925712] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 22:39:22,337 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 22:39:22,337 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [74, 73, 73] total 146 [2022-03-19 22:39:22,337 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1152568678] [2022-03-19 22:39:22,337 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-19 22:39:22,337 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 146 states [2022-03-19 22:39:22,337 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 22:39:22,338 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 146 interpolants. [2022-03-19 22:39:22,339 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3269, Invalid=17901, Unknown=0, NotChecked=0, Total=21170 [2022-03-19 22:39:22,340 INFO L87 Difference]: Start difference. First operand 1050 states and 1356 transitions. Second operand has 146 states, 146 states have (on average 1.2945205479452055) internal successors, (189), 143 states have internal predecessors, (189), 35 states have call successors, (38), 4 states have call predecessors, (38), 1 states have return successors, (34), 34 states have call predecessors, (34), 34 states have call successors, (34) [2022-03-19 22:39:25,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 22:39:25,516 INFO L93 Difference]: Finished difference Result 1066 states and 1374 transitions. [2022-03-19 22:39:25,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2022-03-19 22:39:25,516 INFO L78 Accepts]: Start accepts. Automaton has has 146 states, 146 states have (on average 1.2945205479452055) internal successors, (189), 143 states have internal predecessors, (189), 35 states have call successors, (38), 4 states have call predecessors, (38), 1 states have return successors, (34), 34 states have call predecessors, (34), 34 states have call successors, (34) Word has length 280 [2022-03-19 22:39:25,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 22:39:25,524 INFO L225 Difference]: With dead ends: 1066 [2022-03-19 22:39:25,524 INFO L226 Difference]: Without dead ends: 1064 [2022-03-19 22:39:25,526 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 774 GetRequests, 554 SyntacticMatches, 3 SemanticMatches, 217 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13653 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=8330, Invalid=39412, Unknown=0, NotChecked=0, Total=47742 [2022-03-19 22:39:25,526 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 212 mSDsluCounter, 262 mSDsCounter, 0 mSdLazyCounter, 4296 mSolverCounterSat, 630 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 213 SdHoareTripleChecker+Valid, 274 SdHoareTripleChecker+Invalid, 4926 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 630 IncrementalHoareTripleChecker+Valid, 4296 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-03-19 22:39:25,526 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [213 Valid, 274 Invalid, 4926 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [630 Valid, 4296 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-03-19 22:39:25,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1064 states. [2022-03-19 22:39:26,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1064 to 1060. [2022-03-19 22:39:26,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1060 states, 736 states have (on average 1.046195652173913) internal successors, (770), 748 states have internal predecessors, (770), 299 states have call successors, (299), 25 states have call predecessors, (299), 24 states have return successors, (298), 286 states have call predecessors, (298), 298 states have call successors, (298) [2022-03-19 22:39:26,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1060 states to 1060 states and 1367 transitions. [2022-03-19 22:39:26,012 INFO L78 Accepts]: Start accepts. Automaton has 1060 states and 1367 transitions. Word has length 280 [2022-03-19 22:39:26,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 22:39:26,012 INFO L478 AbstractCegarLoop]: Abstraction has 1060 states and 1367 transitions. [2022-03-19 22:39:26,012 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 146 states, 146 states have (on average 1.2945205479452055) internal successors, (189), 143 states have internal predecessors, (189), 35 states have call successors, (38), 4 states have call predecessors, (38), 1 states have return successors, (34), 34 states have call predecessors, (34), 34 states have call successors, (34) [2022-03-19 22:39:26,012 INFO L276 IsEmpty]: Start isEmpty. Operand 1060 states and 1367 transitions. [2022-03-19 22:39:26,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 288 [2022-03-19 22:39:26,015 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 22:39:26,015 INFO L499 BasicCegarLoop]: trace histogram [35, 35, 35, 35, 34, 34, 34, 34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 22:39:26,032 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Ended with exit code 0 [2022-03-19 22:39:26,235 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46,47 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 22:39:26,235 INFO L403 AbstractCegarLoop]: === Iteration 48 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 22:39:26,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 22:39:26,236 INFO L85 PathProgramCache]: Analyzing trace with hash -1283354042, now seen corresponding path program 44 times [2022-03-19 22:39:26,236 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 22:39:26,236 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [845892028] [2022-03-19 22:39:26,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 22:39:26,236 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 22:39:26,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:39:29,572 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 22:39:29,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:39:29,574 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2022-03-19 22:39:29,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:39:29,576 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2022-03-19 22:39:29,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:39:29,577 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2022-03-19 22:39:29,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:39:29,579 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2022-03-19 22:39:29,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:39:29,580 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2022-03-19 22:39:29,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:39:29,582 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2022-03-19 22:39:29,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:39:29,583 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2022-03-19 22:39:29,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:39:29,585 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2022-03-19 22:39:29,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:39:29,587 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2022-03-19 22:39:29,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:39:29,588 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 108 [2022-03-19 22:39:29,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:39:29,590 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 115 [2022-03-19 22:39:29,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:39:29,591 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 122 [2022-03-19 22:39:29,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:39:29,593 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 129 [2022-03-19 22:39:29,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:39:29,595 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 136 [2022-03-19 22:39:29,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:39:29,597 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 143 [2022-03-19 22:39:29,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:39:29,598 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 150 [2022-03-19 22:39:29,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:39:29,601 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 157 [2022-03-19 22:39:29,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:39:29,602 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 164 [2022-03-19 22:39:29,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:39:29,604 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 171 [2022-03-19 22:39:29,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:39:29,606 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 178 [2022-03-19 22:39:29,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:39:29,607 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 185 [2022-03-19 22:39:29,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:39:29,609 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 192 [2022-03-19 22:39:29,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:39:29,610 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 199 [2022-03-19 22:39:29,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:39:29,612 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 206 [2022-03-19 22:39:29,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:39:29,613 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 213 [2022-03-19 22:39:29,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:39:29,615 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 220 [2022-03-19 22:39:29,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:39:29,616 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 227 [2022-03-19 22:39:29,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:39:29,617 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 234 [2022-03-19 22:39:29,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:39:29,619 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 241 [2022-03-19 22:39:29,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:39:29,620 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 248 [2022-03-19 22:39:29,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:39:29,622 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 255 [2022-03-19 22:39:29,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:39:29,624 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 262 [2022-03-19 22:39:29,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:39:29,625 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 269 [2022-03-19 22:39:29,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:39:29,627 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 276 [2022-03-19 22:39:29,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:39:29,629 INFO L134 CoverageAnalysis]: Checked inductivity of 4693 backedges. 1685 proven. 764 refuted. 0 times theorem prover too weak. 2244 trivial. 0 not checked. [2022-03-19 22:39:29,629 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 22:39:29,629 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [845892028] [2022-03-19 22:39:29,629 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [845892028] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 22:39:29,629 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1244482519] [2022-03-19 22:39:29,629 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 22:39:29,630 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 22:39:29,630 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 22:39:29,631 INFO L229 MonitoredProcess]: Starting monitored process 48 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 22:39:29,652 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2022-03-19 22:39:29,742 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 22:39:29,743 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 22:39:29,746 INFO L263 TraceCheckSpWp]: Trace formula consists of 708 conjuncts, 214 conjunts are in the unsatisfiable core [2022-03-19 22:39:29,749 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 22:39:35,733 INFO L134 CoverageAnalysis]: Checked inductivity of 4693 backedges. 68 proven. 2381 refuted. 0 times theorem prover too weak. 2244 trivial. 0 not checked. [2022-03-19 22:39:35,733 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 22:39:42,454 INFO L134 CoverageAnalysis]: Checked inductivity of 4693 backedges. 68 proven. 2381 refuted. 0 times theorem prover too weak. 2244 trivial. 0 not checked. [2022-03-19 22:39:42,454 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1244482519] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 22:39:42,454 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 22:39:42,454 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [78, 76, 76] total 222 [2022-03-19 22:39:42,455 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1621565119] [2022-03-19 22:39:42,455 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-19 22:39:42,455 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 222 states [2022-03-19 22:39:42,455 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 22:39:42,456 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 222 interpolants. [2022-03-19 22:39:42,459 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6159, Invalid=42903, Unknown=0, NotChecked=0, Total=49062 [2022-03-19 22:39:42,459 INFO L87 Difference]: Start difference. First operand 1060 states and 1367 transitions. Second operand has 222 states, 221 states have (on average 1.506787330316742) internal successors, (333), 219 states have internal predecessors, (333), 104 states have call successors, (107), 4 states have call predecessors, (107), 1 states have return successors, (103), 103 states have call predecessors, (103), 103 states have call successors, (103) [2022-03-19 22:40:13,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 22:40:13,737 INFO L93 Difference]: Finished difference Result 1366 states and 1725 transitions. [2022-03-19 22:40:13,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 155 states. [2022-03-19 22:40:13,738 INFO L78 Accepts]: Start accepts. Automaton has has 222 states, 221 states have (on average 1.506787330316742) internal successors, (333), 219 states have internal predecessors, (333), 104 states have call successors, (107), 4 states have call predecessors, (107), 1 states have return successors, (103), 103 states have call predecessors, (103), 103 states have call successors, (103) Word has length 287 [2022-03-19 22:40:13,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 22:40:13,741 INFO L225 Difference]: With dead ends: 1366 [2022-03-19 22:40:13,741 INFO L226 Difference]: Without dead ends: 1171 [2022-03-19 22:40:13,747 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 873 GetRequests, 498 SyntacticMatches, 3 SemanticMatches, 372 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42170 ImplicationChecksByTransitivity, 36.4s TimeCoverageRelationStatistics Valid=15791, Invalid=123711, Unknown=0, NotChecked=0, Total=139502 [2022-03-19 22:40:13,747 INFO L913 BasicCegarLoop]: 46 mSDtfsCounter, 1112 mSDsluCounter, 402 mSDsCounter, 0 mSdLazyCounter, 18571 mSolverCounterSat, 1852 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1113 SdHoareTripleChecker+Valid, 448 SdHoareTripleChecker+Invalid, 20423 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1852 IncrementalHoareTripleChecker+Valid, 18571 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.0s IncrementalHoareTripleChecker+Time [2022-03-19 22:40:13,747 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [1113 Valid, 448 Invalid, 20423 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1852 Valid, 18571 Invalid, 0 Unknown, 0 Unchecked, 7.0s Time] [2022-03-19 22:40:13,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1171 states. [2022-03-19 22:40:14,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1171 to 1170. [2022-03-19 22:40:14,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1170 states, 811 states have (on average 1.0456226880394575) internal successors, (848), 823 states have internal predecessors, (848), 333 states have call successors, (333), 26 states have call predecessors, (333), 25 states have return successors, (332), 320 states have call predecessors, (332), 332 states have call successors, (332) [2022-03-19 22:40:14,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1170 states to 1170 states and 1513 transitions. [2022-03-19 22:40:14,312 INFO L78 Accepts]: Start accepts. Automaton has 1170 states and 1513 transitions. Word has length 287 [2022-03-19 22:40:14,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 22:40:14,312 INFO L478 AbstractCegarLoop]: Abstraction has 1170 states and 1513 transitions. [2022-03-19 22:40:14,312 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 222 states, 221 states have (on average 1.506787330316742) internal successors, (333), 219 states have internal predecessors, (333), 104 states have call successors, (107), 4 states have call predecessors, (107), 1 states have return successors, (103), 103 states have call predecessors, (103), 103 states have call successors, (103) [2022-03-19 22:40:14,313 INFO L276 IsEmpty]: Start isEmpty. Operand 1170 states and 1513 transitions. [2022-03-19 22:40:14,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 296 [2022-03-19 22:40:14,315 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 22:40:14,316 INFO L499 BasicCegarLoop]: trace histogram [36, 36, 36, 36, 35, 35, 35, 35, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 22:40:14,333 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Forceful destruction successful, exit code 0 [2022-03-19 22:40:14,531 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2022-03-19 22:40:14,531 INFO L403 AbstractCegarLoop]: === Iteration 49 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 22:40:14,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 22:40:14,532 INFO L85 PathProgramCache]: Analyzing trace with hash -1727999963, now seen corresponding path program 45 times [2022-03-19 22:40:14,532 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 22:40:14,532 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [325691529] [2022-03-19 22:40:14,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 22:40:14,532 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 22:40:14,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:40:17,768 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 22:40:17,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:40:17,770 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2022-03-19 22:40:17,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:40:17,772 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2022-03-19 22:40:17,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:40:17,773 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2022-03-19 22:40:17,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:40:17,775 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2022-03-19 22:40:17,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:40:17,788 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2022-03-19 22:40:17,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:40:17,790 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2022-03-19 22:40:17,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:40:17,792 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2022-03-19 22:40:17,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:40:17,794 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2022-03-19 22:40:17,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:40:17,795 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 102 [2022-03-19 22:40:17,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:40:17,797 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 109 [2022-03-19 22:40:17,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:40:17,798 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 116 [2022-03-19 22:40:17,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:40:17,800 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 123 [2022-03-19 22:40:17,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:40:17,801 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 130 [2022-03-19 22:40:17,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:40:17,803 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 137 [2022-03-19 22:40:17,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:40:17,804 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 144 [2022-03-19 22:40:17,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:40:17,806 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 151 [2022-03-19 22:40:17,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:40:17,807 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 158 [2022-03-19 22:40:17,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:40:17,809 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 165 [2022-03-19 22:40:17,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:40:17,810 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 172 [2022-03-19 22:40:17,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:40:17,812 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 179 [2022-03-19 22:40:17,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:40:17,813 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 186 [2022-03-19 22:40:17,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:40:17,815 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 193 [2022-03-19 22:40:17,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:40:17,817 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 200 [2022-03-19 22:40:17,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:40:17,818 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 207 [2022-03-19 22:40:17,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:40:17,820 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 214 [2022-03-19 22:40:17,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:40:17,821 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 221 [2022-03-19 22:40:17,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:40:17,822 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 228 [2022-03-19 22:40:17,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:40:17,824 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 235 [2022-03-19 22:40:17,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:40:17,826 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 242 [2022-03-19 22:40:17,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:40:17,827 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 249 [2022-03-19 22:40:17,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:40:17,829 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 256 [2022-03-19 22:40:17,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:40:17,830 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 263 [2022-03-19 22:40:17,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:40:17,832 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 270 [2022-03-19 22:40:17,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:40:17,833 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 277 [2022-03-19 22:40:17,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:40:17,835 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 284 [2022-03-19 22:40:17,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:40:17,837 INFO L134 CoverageAnalysis]: Checked inductivity of 4971 backedges. 1787 proven. 804 refuted. 0 times theorem prover too weak. 2380 trivial. 0 not checked. [2022-03-19 22:40:17,837 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 22:40:17,837 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [325691529] [2022-03-19 22:40:17,837 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [325691529] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 22:40:17,837 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [412955189] [2022-03-19 22:40:17,837 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-19 22:40:17,838 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 22:40:17,838 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 22:40:17,839 INFO L229 MonitoredProcess]: Starting monitored process 49 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 22:40:17,845 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2022-03-19 22:40:17,978 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 36 check-sat command(s) [2022-03-19 22:40:17,979 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 22:40:17,982 INFO L263 TraceCheckSpWp]: Trace formula consists of 727 conjuncts, 114 conjunts are in the unsatisfiable core [2022-03-19 22:40:17,984 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 22:40:24,360 INFO L134 CoverageAnalysis]: Checked inductivity of 4971 backedges. 70 proven. 2521 refuted. 0 times theorem prover too weak. 2380 trivial. 0 not checked. [2022-03-19 22:40:24,361 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 22:40:31,108 INFO L134 CoverageAnalysis]: Checked inductivity of 4971 backedges. 70 proven. 2521 refuted. 0 times theorem prover too weak. 2380 trivial. 0 not checked. [2022-03-19 22:40:31,108 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [412955189] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 22:40:31,108 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 22:40:31,109 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [80, 78, 78] total 228 [2022-03-19 22:40:31,109 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2027333459] [2022-03-19 22:40:31,109 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-19 22:40:31,109 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 228 states [2022-03-19 22:40:31,109 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 22:40:31,110 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 228 interpolants. [2022-03-19 22:40:31,113 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5762, Invalid=45994, Unknown=0, NotChecked=0, Total=51756 [2022-03-19 22:40:31,114 INFO L87 Difference]: Start difference. First operand 1170 states and 1513 transitions. Second operand has 228 states, 227 states have (on average 1.5066079295154184) internal successors, (342), 225 states have internal predecessors, (342), 107 states have call successors, (110), 4 states have call predecessors, (110), 1 states have return successors, (106), 106 states have call predecessors, (106), 106 states have call successors, (106) [2022-03-19 22:41:06,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 22:41:06,174 INFO L93 Difference]: Finished difference Result 1322 states and 1663 transitions. [2022-03-19 22:41:06,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 120 states. [2022-03-19 22:41:06,174 INFO L78 Accepts]: Start accepts. Automaton has has 228 states, 227 states have (on average 1.5066079295154184) internal successors, (342), 225 states have internal predecessors, (342), 107 states have call successors, (110), 4 states have call predecessors, (110), 1 states have return successors, (106), 106 states have call predecessors, (106), 106 states have call successors, (106) Word has length 295 [2022-03-19 22:41:06,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 22:41:06,178 INFO L225 Difference]: With dead ends: 1322 [2022-03-19 22:41:06,178 INFO L226 Difference]: Without dead ends: 1116 [2022-03-19 22:41:06,182 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 858 GetRequests, 512 SyntacticMatches, 3 SemanticMatches, 343 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30914 ImplicationChecksByTransitivity, 44.6s TimeCoverageRelationStatistics Valid=12435, Invalid=106245, Unknown=0, NotChecked=0, Total=118680 [2022-03-19 22:41:06,182 INFO L913 BasicCegarLoop]: 47 mSDtfsCounter, 183 mSDsluCounter, 262 mSDsCounter, 0 mSdLazyCounter, 8451 mSolverCounterSat, 884 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 184 SdHoareTripleChecker+Valid, 309 SdHoareTripleChecker+Invalid, 9335 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 884 IncrementalHoareTripleChecker+Valid, 8451 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.4s IncrementalHoareTripleChecker+Time [2022-03-19 22:41:06,183 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [184 Valid, 309 Invalid, 9335 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [884 Valid, 8451 Invalid, 0 Unknown, 0 Unchecked, 3.4s Time] [2022-03-19 22:41:06,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1116 states. [2022-03-19 22:41:06,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1116 to 1115. [2022-03-19 22:41:06,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1115 states, 774 states have (on average 1.0465116279069768) internal successors, (810), 786 states have internal predecessors, (810), 316 states have call successors, (316), 25 states have call predecessors, (316), 24 states have return successors, (315), 303 states have call predecessors, (315), 315 states have call successors, (315) [2022-03-19 22:41:06,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1115 states to 1115 states and 1441 transitions. [2022-03-19 22:41:06,671 INFO L78 Accepts]: Start accepts. Automaton has 1115 states and 1441 transitions. Word has length 295 [2022-03-19 22:41:06,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 22:41:06,672 INFO L478 AbstractCegarLoop]: Abstraction has 1115 states and 1441 transitions. [2022-03-19 22:41:06,672 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 228 states, 227 states have (on average 1.5066079295154184) internal successors, (342), 225 states have internal predecessors, (342), 107 states have call successors, (110), 4 states have call predecessors, (110), 1 states have return successors, (106), 106 states have call predecessors, (106), 106 states have call successors, (106) [2022-03-19 22:41:06,672 INFO L276 IsEmpty]: Start isEmpty. Operand 1115 states and 1441 transitions. [2022-03-19 22:41:06,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 297 [2022-03-19 22:41:06,675 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 22:41:06,675 INFO L499 BasicCegarLoop]: trace histogram [37, 36, 36, 36, 35, 35, 35, 35, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 22:41:06,692 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Forceful destruction successful, exit code 0 [2022-03-19 22:41:06,891 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2022-03-19 22:41:06,892 INFO L403 AbstractCegarLoop]: === Iteration 50 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 22:41:06,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 22:41:06,892 INFO L85 PathProgramCache]: Analyzing trace with hash 1282482161, now seen corresponding path program 46 times [2022-03-19 22:41:06,892 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 22:41:06,892 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1123306947] [2022-03-19 22:41:06,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 22:41:06,892 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 22:41:06,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:41:08,165 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 22:41:08,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:41:08,168 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-03-19 22:41:08,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:41:08,169 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2022-03-19 22:41:08,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:41:08,170 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2022-03-19 22:41:08,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:41:08,171 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2022-03-19 22:41:08,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:41:08,173 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2022-03-19 22:41:08,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:41:08,174 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2022-03-19 22:41:08,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:41:08,175 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2022-03-19 22:41:08,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:41:08,176 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2022-03-19 22:41:08,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:41:08,177 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2022-03-19 22:41:08,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:41:08,178 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 110 [2022-03-19 22:41:08,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:41:08,179 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 117 [2022-03-19 22:41:08,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:41:08,180 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 124 [2022-03-19 22:41:08,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:41:08,181 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 131 [2022-03-19 22:41:08,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:41:08,182 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 138 [2022-03-19 22:41:08,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:41:08,185 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 145 [2022-03-19 22:41:08,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:41:08,186 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 152 [2022-03-19 22:41:08,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:41:08,187 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 159 [2022-03-19 22:41:08,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:41:08,188 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 166 [2022-03-19 22:41:08,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:41:08,189 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 173 [2022-03-19 22:41:08,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:41:08,190 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 180 [2022-03-19 22:41:08,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:41:08,191 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 187 [2022-03-19 22:41:08,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:41:08,192 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 194 [2022-03-19 22:41:08,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:41:08,193 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 201 [2022-03-19 22:41:08,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:41:08,195 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 208 [2022-03-19 22:41:08,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:41:08,196 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 215 [2022-03-19 22:41:08,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:41:08,197 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 222 [2022-03-19 22:41:08,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:41:08,198 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 229 [2022-03-19 22:41:08,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:41:08,199 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 236 [2022-03-19 22:41:08,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:41:08,200 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 243 [2022-03-19 22:41:08,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:41:08,201 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 250 [2022-03-19 22:41:08,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:41:08,202 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 257 [2022-03-19 22:41:08,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:41:08,203 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 264 [2022-03-19 22:41:08,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:41:08,204 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 271 [2022-03-19 22:41:08,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:41:08,205 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 278 [2022-03-19 22:41:08,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:41:08,206 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 285 [2022-03-19 22:41:08,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:41:08,208 INFO L134 CoverageAnalysis]: Checked inductivity of 5008 backedges. 700 proven. 1928 refuted. 0 times theorem prover too weak. 2380 trivial. 0 not checked. [2022-03-19 22:41:08,208 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 22:41:08,208 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1123306947] [2022-03-19 22:41:08,208 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1123306947] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 22:41:08,208 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1116332507] [2022-03-19 22:41:08,208 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 22:41:08,208 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 22:41:08,208 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 22:41:08,209 INFO L229 MonitoredProcess]: Starting monitored process 50 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 22:41:08,210 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2022-03-19 22:41:08,297 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 22:41:08,297 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 22:41:08,301 INFO L263 TraceCheckSpWp]: Trace formula consists of 732 conjuncts, 114 conjunts are in the unsatisfiable core [2022-03-19 22:41:08,304 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 22:41:10,655 INFO L134 CoverageAnalysis]: Checked inductivity of 5008 backedges. 70 proven. 2558 refuted. 0 times theorem prover too weak. 2380 trivial. 0 not checked. [2022-03-19 22:41:10,655 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 22:41:12,028 INFO L134 CoverageAnalysis]: Checked inductivity of 5008 backedges. 70 proven. 2558 refuted. 0 times theorem prover too weak. 2380 trivial. 0 not checked. [2022-03-19 22:41:12,028 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1116332507] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 22:41:12,028 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 22:41:12,028 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [78, 77, 77] total 154 [2022-03-19 22:41:12,028 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1529136222] [2022-03-19 22:41:12,028 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-19 22:41:12,029 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 154 states [2022-03-19 22:41:12,029 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 22:41:12,029 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 154 interpolants. [2022-03-19 22:41:12,031 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3640, Invalid=19922, Unknown=0, NotChecked=0, Total=23562 [2022-03-19 22:41:12,031 INFO L87 Difference]: Start difference. First operand 1115 states and 1441 transitions. Second operand has 154 states, 154 states have (on average 1.2922077922077921) internal successors, (199), 151 states have internal predecessors, (199), 37 states have call successors, (40), 4 states have call predecessors, (40), 1 states have return successors, (36), 36 states have call predecessors, (36), 36 states have call successors, (36) [2022-03-19 22:41:15,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 22:41:15,539 INFO L93 Difference]: Finished difference Result 1131 states and 1459 transitions. [2022-03-19 22:41:15,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2022-03-19 22:41:15,540 INFO L78 Accepts]: Start accepts. Automaton has has 154 states, 154 states have (on average 1.2922077922077921) internal successors, (199), 151 states have internal predecessors, (199), 37 states have call successors, (40), 4 states have call predecessors, (40), 1 states have return successors, (36), 36 states have call predecessors, (36), 36 states have call successors, (36) Word has length 296 [2022-03-19 22:41:15,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 22:41:15,558 INFO L225 Difference]: With dead ends: 1131 [2022-03-19 22:41:15,558 INFO L226 Difference]: Without dead ends: 1129 [2022-03-19 22:41:15,561 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 818 GetRequests, 586 SyntacticMatches, 3 SemanticMatches, 229 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15212 ImplicationChecksByTransitivity, 5.9s TimeCoverageRelationStatistics Valid=9285, Invalid=43845, Unknown=0, NotChecked=0, Total=53130 [2022-03-19 22:41:15,561 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 301 mSDsluCounter, 267 mSDsCounter, 0 mSdLazyCounter, 4413 mSolverCounterSat, 785 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 302 SdHoareTripleChecker+Valid, 279 SdHoareTripleChecker+Invalid, 5198 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 785 IncrementalHoareTripleChecker+Valid, 4413 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-03-19 22:41:15,561 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [302 Valid, 279 Invalid, 5198 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [785 Valid, 4413 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-03-19 22:41:15,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1129 states. [2022-03-19 22:41:16,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1129 to 1125. [2022-03-19 22:41:16,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1125 states, 781 states have (on average 1.0460947503201024) internal successors, (817), 793 states have internal predecessors, (817), 318 states have call successors, (318), 26 states have call predecessors, (318), 25 states have return successors, (317), 305 states have call predecessors, (317), 317 states have call successors, (317) [2022-03-19 22:41:16,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1125 states to 1125 states and 1452 transitions. [2022-03-19 22:41:16,110 INFO L78 Accepts]: Start accepts. Automaton has 1125 states and 1452 transitions. Word has length 296 [2022-03-19 22:41:16,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 22:41:16,110 INFO L478 AbstractCegarLoop]: Abstraction has 1125 states and 1452 transitions. [2022-03-19 22:41:16,110 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 154 states, 154 states have (on average 1.2922077922077921) internal successors, (199), 151 states have internal predecessors, (199), 37 states have call successors, (40), 4 states have call predecessors, (40), 1 states have return successors, (36), 36 states have call predecessors, (36), 36 states have call successors, (36) [2022-03-19 22:41:16,110 INFO L276 IsEmpty]: Start isEmpty. Operand 1125 states and 1452 transitions. [2022-03-19 22:41:16,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 304 [2022-03-19 22:41:16,113 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 22:41:16,113 INFO L499 BasicCegarLoop]: trace histogram [37, 37, 37, 37, 36, 36, 36, 36, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 22:41:16,130 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Ended with exit code 0 [2022-03-19 22:41:16,316 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2022-03-19 22:41:16,317 INFO L403 AbstractCegarLoop]: === Iteration 51 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 22:41:16,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 22:41:16,317 INFO L85 PathProgramCache]: Analyzing trace with hash -307161754, now seen corresponding path program 47 times [2022-03-19 22:41:16,317 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 22:41:16,317 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [717470499] [2022-03-19 22:41:16,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 22:41:16,317 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 22:41:16,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:41:19,875 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 22:41:19,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:41:19,877 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-03-19 22:41:19,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:41:19,878 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2022-03-19 22:41:19,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:41:19,880 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2022-03-19 22:41:19,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:41:19,881 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2022-03-19 22:41:19,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:41:19,883 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2022-03-19 22:41:19,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:41:19,884 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2022-03-19 22:41:19,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:41:19,886 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2022-03-19 22:41:19,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:41:19,887 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2022-03-19 22:41:19,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:41:19,889 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2022-03-19 22:41:19,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:41:19,896 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 110 [2022-03-19 22:41:19,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:41:19,898 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 117 [2022-03-19 22:41:19,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:41:19,899 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 124 [2022-03-19 22:41:19,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:41:19,900 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 131 [2022-03-19 22:41:19,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:41:19,903 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 138 [2022-03-19 22:41:19,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:41:19,905 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 145 [2022-03-19 22:41:19,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:41:19,906 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 152 [2022-03-19 22:41:19,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:41:19,908 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 159 [2022-03-19 22:41:19,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:41:19,909 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 166 [2022-03-19 22:41:19,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:41:19,910 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 173 [2022-03-19 22:41:19,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:41:19,912 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 180 [2022-03-19 22:41:19,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:41:19,934 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 187 [2022-03-19 22:41:19,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:41:19,935 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 194 [2022-03-19 22:41:19,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:41:19,937 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 201 [2022-03-19 22:41:19,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:41:19,938 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 208 [2022-03-19 22:41:19,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:41:19,939 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 215 [2022-03-19 22:41:19,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:41:19,941 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 222 [2022-03-19 22:41:19,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:41:19,942 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 229 [2022-03-19 22:41:19,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:41:19,943 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 236 [2022-03-19 22:41:19,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:41:19,945 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 243 [2022-03-19 22:41:19,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:41:19,946 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 250 [2022-03-19 22:41:19,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:41:19,947 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 257 [2022-03-19 22:41:19,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:41:19,949 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 264 [2022-03-19 22:41:19,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:41:19,950 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 271 [2022-03-19 22:41:19,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:41:19,951 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 278 [2022-03-19 22:41:19,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:41:19,953 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 285 [2022-03-19 22:41:19,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:41:19,954 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 292 [2022-03-19 22:41:19,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:41:19,957 INFO L134 CoverageAnalysis]: Checked inductivity of 5257 backedges. 1892 proven. 845 refuted. 0 times theorem prover too weak. 2520 trivial. 0 not checked. [2022-03-19 22:41:19,957 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 22:41:19,957 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [717470499] [2022-03-19 22:41:19,957 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [717470499] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 22:41:19,957 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [187139704] [2022-03-19 22:41:19,957 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-19 22:41:19,957 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 22:41:19,957 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 22:41:19,958 INFO L229 MonitoredProcess]: Starting monitored process 51 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 22:41:19,959 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2022-03-19 22:41:20,092 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 37 check-sat command(s) [2022-03-19 22:41:20,092 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 22:41:20,096 INFO L263 TraceCheckSpWp]: Trace formula consists of 746 conjuncts, 153 conjunts are in the unsatisfiable core [2022-03-19 22:41:20,099 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 22:41:22,671 INFO L134 CoverageAnalysis]: Checked inductivity of 5257 backedges. 72 proven. 2665 refuted. 0 times theorem prover too weak. 2520 trivial. 0 not checked. [2022-03-19 22:41:22,672 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 22:41:30,547 INFO L134 CoverageAnalysis]: Checked inductivity of 5257 backedges. 72 proven. 2665 refuted. 0 times theorem prover too weak. 2520 trivial. 0 not checked. [2022-03-19 22:41:30,547 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [187139704] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 22:41:30,547 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 22:41:30,547 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [82, 80, 80] total 197 [2022-03-19 22:41:30,547 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1468681288] [2022-03-19 22:41:30,547 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-19 22:41:30,548 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 197 states [2022-03-19 22:41:30,548 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 22:41:30,549 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 197 interpolants. [2022-03-19 22:41:30,551 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5326, Invalid=33286, Unknown=0, NotChecked=0, Total=38612 [2022-03-19 22:41:30,551 INFO L87 Difference]: Start difference. First operand 1125 states and 1452 transitions. Second operand has 197 states, 196 states have (on average 1.6020408163265305) internal successors, (314), 194 states have internal predecessors, (314), 110 states have call successors, (113), 4 states have call predecessors, (113), 1 states have return successors, (109), 109 states have call predecessors, (109), 109 states have call successors, (109) [2022-03-19 22:42:06,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 22:42:06,091 INFO L93 Difference]: Finished difference Result 1451 states and 1834 transitions. [2022-03-19 22:42:06,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 163 states. [2022-03-19 22:42:06,092 INFO L78 Accepts]: Start accepts. Automaton has has 197 states, 196 states have (on average 1.6020408163265305) internal successors, (314), 194 states have internal predecessors, (314), 110 states have call successors, (113), 4 states have call predecessors, (113), 1 states have return successors, (109), 109 states have call predecessors, (109), 109 states have call successors, (109) Word has length 303 [2022-03-19 22:42:06,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 22:42:06,103 INFO L225 Difference]: With dead ends: 1451 [2022-03-19 22:42:06,103 INFO L226 Difference]: Without dead ends: 1246 [2022-03-19 22:42:06,124 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 921 GetRequests, 562 SyntacticMatches, 4 SemanticMatches, 355 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32901 ImplicationChecksByTransitivity, 37.9s TimeCoverageRelationStatistics Valid=15947, Invalid=111145, Unknown=0, NotChecked=0, Total=127092 [2022-03-19 22:42:06,124 INFO L913 BasicCegarLoop]: 48 mSDtfsCounter, 1181 mSDsluCounter, 422 mSDsCounter, 0 mSdLazyCounter, 20028 mSolverCounterSat, 2026 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1182 SdHoareTripleChecker+Valid, 470 SdHoareTripleChecker+Invalid, 22054 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2026 IncrementalHoareTripleChecker+Valid, 20028 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.6s IncrementalHoareTripleChecker+Time [2022-03-19 22:42:06,124 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [1182 Valid, 470 Invalid, 22054 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2026 Valid, 20028 Invalid, 0 Unknown, 0 Unchecked, 7.6s Time] [2022-03-19 22:42:06,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1246 states. [2022-03-19 22:42:06,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1246 to 1244. [2022-03-19 22:42:06,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1244 states, 862 states have (on average 1.0452436194895591) internal successors, (901), 875 states have internal predecessors, (901), 355 states have call successors, (355), 27 states have call predecessors, (355), 26 states have return successors, (354), 341 states have call predecessors, (354), 354 states have call successors, (354) [2022-03-19 22:42:06,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1244 states to 1244 states and 1610 transitions. [2022-03-19 22:42:06,798 INFO L78 Accepts]: Start accepts. Automaton has 1244 states and 1610 transitions. Word has length 303 [2022-03-19 22:42:06,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 22:42:06,798 INFO L478 AbstractCegarLoop]: Abstraction has 1244 states and 1610 transitions. [2022-03-19 22:42:06,799 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 197 states, 196 states have (on average 1.6020408163265305) internal successors, (314), 194 states have internal predecessors, (314), 110 states have call successors, (113), 4 states have call predecessors, (113), 1 states have return successors, (109), 109 states have call predecessors, (109), 109 states have call successors, (109) [2022-03-19 22:42:06,799 INFO L276 IsEmpty]: Start isEmpty. Operand 1244 states and 1610 transitions. [2022-03-19 22:42:06,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 312 [2022-03-19 22:42:06,803 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 22:42:06,803 INFO L499 BasicCegarLoop]: trace histogram [38, 38, 38, 38, 37, 37, 37, 37, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 22:42:06,825 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Forceful destruction successful, exit code 0 [2022-03-19 22:42:07,022 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable50 [2022-03-19 22:42:07,023 INFO L403 AbstractCegarLoop]: === Iteration 52 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 22:42:07,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 22:42:07,023 INFO L85 PathProgramCache]: Analyzing trace with hash -206462715, now seen corresponding path program 48 times [2022-03-19 22:42:07,023 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 22:42:07,023 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1437251303] [2022-03-19 22:42:07,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 22:42:07,024 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 22:42:07,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:42:10,964 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 22:42:10,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:42:10,966 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2022-03-19 22:42:10,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:42:10,968 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-03-19 22:42:10,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:42:10,970 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2022-03-19 22:42:10,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:42:10,971 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2022-03-19 22:42:10,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:42:10,973 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2022-03-19 22:42:10,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:42:10,974 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2022-03-19 22:42:10,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:42:10,976 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2022-03-19 22:42:10,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:42:10,978 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2022-03-19 22:42:10,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:42:10,979 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2022-03-19 22:42:10,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:42:10,981 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2022-03-19 22:42:10,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:42:10,983 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2022-03-19 22:42:10,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:42:10,984 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 125 [2022-03-19 22:42:10,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:42:10,986 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 132 [2022-03-19 22:42:10,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:42:10,988 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 139 [2022-03-19 22:42:10,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:42:10,990 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 146 [2022-03-19 22:42:10,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:42:10,992 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 153 [2022-03-19 22:42:10,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:42:10,994 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 160 [2022-03-19 22:42:10,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:42:10,995 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 167 [2022-03-19 22:42:10,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:42:10,997 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 174 [2022-03-19 22:42:10,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:42:10,999 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 181 [2022-03-19 22:42:10,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:42:11,000 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 188 [2022-03-19 22:42:11,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:42:11,002 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 195 [2022-03-19 22:42:11,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:42:11,003 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 202 [2022-03-19 22:42:11,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:42:11,005 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 209 [2022-03-19 22:42:11,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:42:11,007 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 216 [2022-03-19 22:42:11,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:42:11,008 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 223 [2022-03-19 22:42:11,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:42:11,010 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 230 [2022-03-19 22:42:11,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:42:11,011 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 237 [2022-03-19 22:42:11,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:42:11,013 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 244 [2022-03-19 22:42:11,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:42:11,014 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 251 [2022-03-19 22:42:11,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:42:11,016 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 258 [2022-03-19 22:42:11,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:42:11,018 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 265 [2022-03-19 22:42:11,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:42:11,019 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 272 [2022-03-19 22:42:11,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:42:11,021 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 279 [2022-03-19 22:42:11,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:42:11,023 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 286 [2022-03-19 22:42:11,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:42:11,024 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 293 [2022-03-19 22:42:11,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:42:11,026 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 300 [2022-03-19 22:42:11,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:42:11,029 INFO L134 CoverageAnalysis]: Checked inductivity of 5551 backedges. 2000 proven. 887 refuted. 0 times theorem prover too weak. 2664 trivial. 0 not checked. [2022-03-19 22:42:11,029 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 22:42:11,029 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1437251303] [2022-03-19 22:42:11,029 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1437251303] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 22:42:11,029 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1342044404] [2022-03-19 22:42:11,030 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-19 22:42:11,030 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 22:42:11,030 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 22:42:11,031 INFO L229 MonitoredProcess]: Starting monitored process 52 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 22:42:11,035 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2022-03-19 22:42:11,191 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 38 check-sat command(s) [2022-03-19 22:42:11,191 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 22:42:11,195 INFO L263 TraceCheckSpWp]: Trace formula consists of 765 conjuncts, 120 conjunts are in the unsatisfiable core [2022-03-19 22:42:11,199 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 22:42:18,412 INFO L134 CoverageAnalysis]: Checked inductivity of 5551 backedges. 74 proven. 2813 refuted. 0 times theorem prover too weak. 2664 trivial. 0 not checked. [2022-03-19 22:42:18,413 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 22:42:26,677 INFO L134 CoverageAnalysis]: Checked inductivity of 5551 backedges. 74 proven. 2813 refuted. 0 times theorem prover too weak. 2664 trivial. 0 not checked. [2022-03-19 22:42:26,677 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1342044404] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 22:42:26,677 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 22:42:26,678 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [84, 82, 82] total 240 [2022-03-19 22:42:26,678 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [647682586] [2022-03-19 22:42:26,678 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-19 22:42:26,678 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 240 states [2022-03-19 22:42:26,678 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 22:42:26,679 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 240 interpolants. [2022-03-19 22:42:26,681 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6384, Invalid=50976, Unknown=0, NotChecked=0, Total=57360 [2022-03-19 22:42:26,682 INFO L87 Difference]: Start difference. First operand 1244 states and 1610 transitions. Second operand has 240 states, 239 states have (on average 1.506276150627615) internal successors, (360), 237 states have internal predecessors, (360), 113 states have call successors, (116), 4 states have call predecessors, (116), 1 states have return successors, (112), 112 states have call predecessors, (112), 112 states have call successors, (112) [2022-03-19 22:43:03,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 22:43:03,747 INFO L93 Difference]: Finished difference Result 1461 states and 1842 transitions. [2022-03-19 22:43:03,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 126 states. [2022-03-19 22:43:03,747 INFO L78 Accepts]: Start accepts. Automaton has has 240 states, 239 states have (on average 1.506276150627615) internal successors, (360), 237 states have internal predecessors, (360), 113 states have call successors, (116), 4 states have call predecessors, (116), 1 states have return successors, (112), 112 states have call predecessors, (112), 112 states have call successors, (112) Word has length 311 [2022-03-19 22:43:03,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 22:43:03,751 INFO L225 Difference]: With dead ends: 1461 [2022-03-19 22:43:03,751 INFO L226 Difference]: Without dead ends: 1245 [2022-03-19 22:43:03,756 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 904 GetRequests, 540 SyntacticMatches, 3 SemanticMatches, 361 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34263 ImplicationChecksByTransitivity, 48.8s TimeCoverageRelationStatistics Valid=13766, Invalid=117640, Unknown=0, NotChecked=0, Total=131406 [2022-03-19 22:43:03,756 INFO L913 BasicCegarLoop]: 49 mSDtfsCounter, 167 mSDsluCounter, 307 mSDsCounter, 0 mSdLazyCounter, 9902 mSolverCounterSat, 928 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 168 SdHoareTripleChecker+Valid, 356 SdHoareTripleChecker+Invalid, 10830 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 928 IncrementalHoareTripleChecker+Valid, 9902 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.8s IncrementalHoareTripleChecker+Time [2022-03-19 22:43:03,756 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [168 Valid, 356 Invalid, 10830 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [928 Valid, 9902 Invalid, 0 Unknown, 0 Unchecked, 3.8s Time] [2022-03-19 22:43:03,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1245 states. [2022-03-19 22:43:04,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1245 to 1244. [2022-03-19 22:43:04,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1244 states, 862 states have (on average 1.0440835266821347) internal successors, (900), 875 states have internal predecessors, (900), 355 states have call successors, (355), 27 states have call predecessors, (355), 26 states have return successors, (354), 341 states have call predecessors, (354), 354 states have call successors, (354) [2022-03-19 22:43:04,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1244 states to 1244 states and 1609 transitions. [2022-03-19 22:43:04,442 INFO L78 Accepts]: Start accepts. Automaton has 1244 states and 1609 transitions. Word has length 311 [2022-03-19 22:43:04,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 22:43:04,442 INFO L478 AbstractCegarLoop]: Abstraction has 1244 states and 1609 transitions. [2022-03-19 22:43:04,443 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 240 states, 239 states have (on average 1.506276150627615) internal successors, (360), 237 states have internal predecessors, (360), 113 states have call successors, (116), 4 states have call predecessors, (116), 1 states have return successors, (112), 112 states have call predecessors, (112), 112 states have call successors, (112) [2022-03-19 22:43:04,443 INFO L276 IsEmpty]: Start isEmpty. Operand 1244 states and 1609 transitions. [2022-03-19 22:43:04,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 313 [2022-03-19 22:43:04,446 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 22:43:04,446 INFO L499 BasicCegarLoop]: trace histogram [39, 38, 38, 38, 37, 37, 37, 37, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 22:43:04,467 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Ended with exit code 0 [2022-03-19 22:43:04,656 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,52 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 22:43:04,656 INFO L403 AbstractCegarLoop]: === Iteration 53 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 22:43:04,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 22:43:04,656 INFO L85 PathProgramCache]: Analyzing trace with hash 2046875857, now seen corresponding path program 49 times [2022-03-19 22:43:04,656 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 22:43:04,656 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [570965400] [2022-03-19 22:43:04,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 22:43:04,657 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 22:43:04,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:43:06,324 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 22:43:06,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:43:06,326 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2022-03-19 22:43:06,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:43:06,327 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2022-03-19 22:43:06,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:43:06,329 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2022-03-19 22:43:06,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:43:06,330 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2022-03-19 22:43:06,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:43:06,331 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2022-03-19 22:43:06,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:43:06,332 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2022-03-19 22:43:06,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:43:06,337 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2022-03-19 22:43:06,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:43:06,339 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2022-03-19 22:43:06,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:43:06,340 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2022-03-19 22:43:06,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:43:06,341 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 112 [2022-03-19 22:43:06,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:43:06,342 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 119 [2022-03-19 22:43:06,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:43:06,343 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 126 [2022-03-19 22:43:06,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:43:06,344 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 133 [2022-03-19 22:43:06,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:43:06,346 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 140 [2022-03-19 22:43:06,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:43:06,347 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 147 [2022-03-19 22:43:06,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:43:06,348 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 154 [2022-03-19 22:43:06,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:43:06,349 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 161 [2022-03-19 22:43:06,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:43:06,350 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 168 [2022-03-19 22:43:06,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:43:06,352 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 175 [2022-03-19 22:43:06,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:43:06,353 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 182 [2022-03-19 22:43:06,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:43:06,354 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 189 [2022-03-19 22:43:06,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:43:06,355 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 196 [2022-03-19 22:43:06,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:43:06,357 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 203 [2022-03-19 22:43:06,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:43:06,358 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 210 [2022-03-19 22:43:06,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:43:06,362 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 217 [2022-03-19 22:43:06,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:43:06,364 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 224 [2022-03-19 22:43:06,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:43:06,365 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 231 [2022-03-19 22:43:06,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:43:06,366 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 238 [2022-03-19 22:43:06,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:43:06,367 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 245 [2022-03-19 22:43:06,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:43:06,368 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 252 [2022-03-19 22:43:06,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:43:06,370 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 259 [2022-03-19 22:43:06,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:43:06,371 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 266 [2022-03-19 22:43:06,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:43:06,372 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 273 [2022-03-19 22:43:06,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:43:06,373 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 280 [2022-03-19 22:43:06,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:43:06,374 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 287 [2022-03-19 22:43:06,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:43:06,375 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 294 [2022-03-19 22:43:06,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:43:06,376 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 301 [2022-03-19 22:43:06,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:43:06,377 INFO L134 CoverageAnalysis]: Checked inductivity of 5590 backedges. 777 proven. 2149 refuted. 0 times theorem prover too weak. 2664 trivial. 0 not checked. [2022-03-19 22:43:06,377 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 22:43:06,378 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [570965400] [2022-03-19 22:43:06,378 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [570965400] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 22:43:06,378 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1484015553] [2022-03-19 22:43:06,378 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-19 22:43:06,379 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 22:43:06,379 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 22:43:06,380 INFO L229 MonitoredProcess]: Starting monitored process 53 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 22:43:06,381 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2022-03-19 22:43:06,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:43:06,490 INFO L263 TraceCheckSpWp]: Trace formula consists of 770 conjuncts, 120 conjunts are in the unsatisfiable core [2022-03-19 22:43:06,493 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 22:43:08,205 INFO L134 CoverageAnalysis]: Checked inductivity of 5590 backedges. 74 proven. 2852 refuted. 0 times theorem prover too weak. 2664 trivial. 0 not checked. [2022-03-19 22:43:08,205 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 22:43:09,816 INFO L134 CoverageAnalysis]: Checked inductivity of 5590 backedges. 74 proven. 2852 refuted. 0 times theorem prover too weak. 2664 trivial. 0 not checked. [2022-03-19 22:43:09,817 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1484015553] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 22:43:09,817 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 22:43:09,817 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [82, 81, 81] total 162 [2022-03-19 22:43:09,817 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [598778616] [2022-03-19 22:43:09,817 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-19 22:43:09,817 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 162 states [2022-03-19 22:43:09,818 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 22:43:09,818 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 162 interpolants. [2022-03-19 22:43:09,820 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4031, Invalid=22051, Unknown=0, NotChecked=0, Total=26082 [2022-03-19 22:43:09,820 INFO L87 Difference]: Start difference. First operand 1244 states and 1609 transitions. Second operand has 162 states, 162 states have (on average 1.2901234567901234) internal successors, (209), 159 states have internal predecessors, (209), 39 states have call successors, (42), 4 states have call predecessors, (42), 1 states have return successors, (38), 38 states have call predecessors, (38), 38 states have call successors, (38) [2022-03-19 22:43:14,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 22:43:14,236 INFO L93 Difference]: Finished difference Result 1260 states and 1627 transitions. [2022-03-19 22:43:14,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2022-03-19 22:43:14,236 INFO L78 Accepts]: Start accepts. Automaton has has 162 states, 162 states have (on average 1.2901234567901234) internal successors, (209), 159 states have internal predecessors, (209), 39 states have call successors, (42), 4 states have call predecessors, (42), 1 states have return successors, (38), 38 states have call predecessors, (38), 38 states have call successors, (38) Word has length 312 [2022-03-19 22:43:14,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 22:43:14,239 INFO L225 Difference]: With dead ends: 1260 [2022-03-19 22:43:14,239 INFO L226 Difference]: Without dead ends: 1258 [2022-03-19 22:43:14,242 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 862 GetRequests, 618 SyntacticMatches, 3 SemanticMatches, 241 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16855 ImplicationChecksByTransitivity, 6.4s TimeCoverageRelationStatistics Valid=10292, Invalid=48514, Unknown=0, NotChecked=0, Total=58806 [2022-03-19 22:43:14,242 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 278 mSDsluCounter, 262 mSDsCounter, 0 mSdLazyCounter, 4809 mSolverCounterSat, 759 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 279 SdHoareTripleChecker+Valid, 274 SdHoareTripleChecker+Invalid, 5568 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 759 IncrementalHoareTripleChecker+Valid, 4809 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-03-19 22:43:14,242 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [279 Valid, 274 Invalid, 5568 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [759 Valid, 4809 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-03-19 22:43:14,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1258 states. [2022-03-19 22:43:14,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1258 to 1254. [2022-03-19 22:43:14,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1254 states, 869 states have (on average 1.0437284234752588) internal successors, (907), 882 states have internal predecessors, (907), 357 states have call successors, (357), 28 states have call predecessors, (357), 27 states have return successors, (356), 343 states have call predecessors, (356), 356 states have call successors, (356) [2022-03-19 22:43:14,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1254 states to 1254 states and 1620 transitions. [2022-03-19 22:43:14,898 INFO L78 Accepts]: Start accepts. Automaton has 1254 states and 1620 transitions. Word has length 312 [2022-03-19 22:43:14,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 22:43:14,899 INFO L478 AbstractCegarLoop]: Abstraction has 1254 states and 1620 transitions. [2022-03-19 22:43:14,899 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 162 states, 162 states have (on average 1.2901234567901234) internal successors, (209), 159 states have internal predecessors, (209), 39 states have call successors, (42), 4 states have call predecessors, (42), 1 states have return successors, (38), 38 states have call predecessors, (38), 38 states have call successors, (38) [2022-03-19 22:43:14,899 INFO L276 IsEmpty]: Start isEmpty. Operand 1254 states and 1620 transitions. [2022-03-19 22:43:14,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 320 [2022-03-19 22:43:14,903 INFO L491 BasicCegarLoop]: Found error trace [2022-03-19 22:43:14,903 INFO L499 BasicCegarLoop]: trace histogram [39, 39, 39, 39, 38, 38, 38, 38, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 22:43:14,924 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Forceful destruction successful, exit code 0 [2022-03-19 22:43:15,107 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable52 [2022-03-19 22:43:15,107 INFO L403 AbstractCegarLoop]: === Iteration 54 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 22:43:15,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 22:43:15,108 INFO L85 PathProgramCache]: Analyzing trace with hash -292970362, now seen corresponding path program 50 times [2022-03-19 22:43:15,108 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 22:43:15,108 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [190632536] [2022-03-19 22:43:15,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 22:43:15,108 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 22:43:15,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:43:19,127 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 22:43:19,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:43:19,129 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2022-03-19 22:43:19,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:43:19,131 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2022-03-19 22:43:19,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:43:19,132 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2022-03-19 22:43:19,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:43:19,134 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2022-03-19 22:43:19,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:43:19,135 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2022-03-19 22:43:19,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:43:19,137 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2022-03-19 22:43:19,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:43:19,139 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2022-03-19 22:43:19,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:43:19,140 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2022-03-19 22:43:19,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:43:19,142 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2022-03-19 22:43:19,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:43:19,143 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 112 [2022-03-19 22:43:19,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:43:19,145 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 119 [2022-03-19 22:43:19,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:43:19,146 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 126 [2022-03-19 22:43:19,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:43:19,148 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 133 [2022-03-19 22:43:19,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:43:19,150 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 140 [2022-03-19 22:43:19,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:43:19,152 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 147 [2022-03-19 22:43:19,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:43:19,154 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 154 [2022-03-19 22:43:19,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:43:19,155 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 161 [2022-03-19 22:43:19,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:43:19,157 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 168 [2022-03-19 22:43:19,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:43:19,159 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 175 [2022-03-19 22:43:19,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:43:19,160 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 182 [2022-03-19 22:43:19,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:43:19,186 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 189 [2022-03-19 22:43:19,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:43:19,188 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 196 [2022-03-19 22:43:19,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:43:19,189 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 203 [2022-03-19 22:43:19,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:43:19,191 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 210 [2022-03-19 22:43:19,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:43:19,192 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 217 [2022-03-19 22:43:19,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:43:19,194 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 224 [2022-03-19 22:43:19,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:43:19,195 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 231 [2022-03-19 22:43:19,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:43:19,197 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 238 [2022-03-19 22:43:19,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:43:19,198 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 245 [2022-03-19 22:43:19,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:43:19,200 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 252 [2022-03-19 22:43:19,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:43:19,201 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 259 [2022-03-19 22:43:19,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:43:19,203 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 266 [2022-03-19 22:43:19,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:43:19,204 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 273 [2022-03-19 22:43:19,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:43:19,206 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 280 [2022-03-19 22:43:19,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:43:19,207 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 287 [2022-03-19 22:43:19,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:43:19,209 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 294 [2022-03-19 22:43:19,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:43:19,210 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 301 [2022-03-19 22:43:19,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:43:19,211 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 308 [2022-03-19 22:43:19,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 22:43:19,214 INFO L134 CoverageAnalysis]: Checked inductivity of 5853 backedges. 2111 proven. 930 refuted. 0 times theorem prover too weak. 2812 trivial. 0 not checked. [2022-03-19 22:43:19,214 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 22:43:19,214 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [190632536] [2022-03-19 22:43:19,214 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [190632536] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 22:43:19,214 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [121353179] [2022-03-19 22:43:19,214 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 22:43:19,214 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 22:43:19,215 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 22:43:19,215 INFO L229 MonitoredProcess]: Starting monitored process 54 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 22:43:19,216 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2022-03-19 22:43:19,320 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 22:43:19,320 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 22:43:19,324 INFO L263 TraceCheckSpWp]: Trace formula consists of 784 conjuncts, 161 conjunts are in the unsatisfiable core [2022-03-19 22:43:19,328 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 22:43:23,627 INFO L134 CoverageAnalysis]: Checked inductivity of 5853 backedges. 76 proven. 2965 refuted. 0 times theorem prover too weak. 2812 trivial. 0 not checked. [2022-03-19 22:43:23,627 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 22:43:33,490 INFO L134 CoverageAnalysis]: Checked inductivity of 5853 backedges. 76 proven. 2965 refuted. 0 times theorem prover too weak. 2812 trivial. 0 not checked. [2022-03-19 22:43:33,490 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [121353179] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 22:43:33,490 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-19 22:43:33,490 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [86, 84, 84] total 207 [2022-03-19 22:43:33,491 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [714721532] [2022-03-19 22:43:33,491 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-19 22:43:33,491 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 207 states [2022-03-19 22:43:33,491 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-19 22:43:33,492 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 207 interpolants. [2022-03-19 22:43:33,494 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5885, Invalid=36757, Unknown=0, NotChecked=0, Total=42642 [2022-03-19 22:43:33,495 INFO L87 Difference]: Start difference. First operand 1254 states and 1620 transitions. Second operand has 207 states, 206 states have (on average 1.6019417475728155) internal successors, (330), 204 states have internal predecessors, (330), 116 states have call successors, (119), 4 states have call predecessors, (119), 1 states have return successors, (115), 115 states have call predecessors, (115), 115 states have call successors, (115)