/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/array-industry-pattern/array_of_struct_ptr_monotonic.i -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-d966a43 [2022-01-30 21:44:51,712 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-30 21:44:51,714 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-30 21:44:51,750 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-01-30 21:44:51,813 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2022-01-30 21:44:51,844 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-30 21:44:51,844 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-30 21:44:51,845 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-01-30 21:44:51,845 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-01-30 21:44:51,846 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-01-30 21:44:51,846 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-01-30 21:44:51,846 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-01-30 21:44:51,846 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-01-30 21:44:51,846 INFO L138 SettingsManager]: * Use SBE=true [2022-01-30 21:44:51,846 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-30 21:44:51,847 INFO L138 SettingsManager]: * sizeof long=4 [2022-01-30 21:44:51,847 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-30 21:44:51,847 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-01-30 21:44:51,847 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-30 21:44:51,847 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-30 21:44:51,847 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-30 21:44:51,847 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-30 21:44:51,848 INFO L138 SettingsManager]: * sizeof long double=12 [2022-01-30 21:44:51,848 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-30 21:44:51,848 INFO L138 SettingsManager]: * Use constant arrays=true [2022-01-30 21:44:51,848 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-30 21:44:51,848 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-30 21:44:51,848 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-30 21:44:51,848 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-30 21:44:51,849 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-30 21:44:51,849 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-30 21:44:51,849 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-01-30 21:44:51,849 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-01-30 21:44:51,849 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-01-30 21:44:51,849 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-01-30 21:44:51,849 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-01-30 21:44:51,849 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-01-30 21:44:51,850 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-01-30 21:44:51,850 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-01-30 21:44:52,057 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-30 21:44:52,080 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-30 21:44:52,082 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-30 21:44:52,083 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-30 21:44:52,085 INFO L275 PluginConnector]: CDTParser initialized [2022-01-30 21:44:52,086 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-industry-pattern/array_of_struct_ptr_monotonic.i [2022-01-30 21:44:52,146 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/54218e680/4c46d881c23f4176b23d59bf79b6fc87/FLAG087803a8b [2022-01-30 21:44:52,504 INFO L306 CDTParser]: Found 1 translation units. [2022-01-30 21:44:52,505 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-industry-pattern/array_of_struct_ptr_monotonic.i [2022-01-30 21:44:52,509 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/54218e680/4c46d881c23f4176b23d59bf79b6fc87/FLAG087803a8b [2022-01-30 21:44:52,535 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/54218e680/4c46d881c23f4176b23d59bf79b6fc87 [2022-01-30 21:44:52,537 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-30 21:44:52,538 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-01-30 21:44:52,540 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-30 21:44:52,540 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-30 21:44:52,543 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-30 21:44:52,543 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.01 09:44:52" (1/1) ... [2022-01-30 21:44:52,544 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@8ec9cf5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.01 09:44:52, skipping insertion in model container [2022-01-30 21:44:52,544 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.01 09:44:52" (1/1) ... [2022-01-30 21:44:52,550 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-30 21:44:52,561 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-30 21:44:52,733 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/array-industry-pattern/array_of_struct_ptr_monotonic.i[999,1012] [2022-01-30 21:44:52,748 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-30 21:44:52,755 INFO L203 MainTranslator]: Completed pre-run [2022-01-30 21:44:52,766 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/array-industry-pattern/array_of_struct_ptr_monotonic.i[999,1012] [2022-01-30 21:44:52,773 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-30 21:44:52,788 INFO L208 MainTranslator]: Completed translation [2022-01-30 21:44:52,788 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.01 09:44:52 WrapperNode [2022-01-30 21:44:52,788 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-30 21:44:52,789 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-30 21:44:52,790 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-30 21:44:52,790 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-30 21:44:52,797 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.01 09:44:52" (1/1) ... [2022-01-30 21:44:52,798 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.01 09:44:52" (1/1) ... [2022-01-30 21:44:52,803 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.01 09:44:52" (1/1) ... [2022-01-30 21:44:52,804 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.01 09:44:52" (1/1) ... [2022-01-30 21:44:52,814 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.01 09:44:52" (1/1) ... [2022-01-30 21:44:52,817 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.01 09:44:52" (1/1) ... [2022-01-30 21:44:52,825 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.01 09:44:52" (1/1) ... [2022-01-30 21:44:52,827 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-30 21:44:52,828 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-30 21:44:52,828 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-30 21:44:52,829 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-30 21:44:52,829 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.01 09:44:52" (1/1) ... [2022-01-30 21:44:52,834 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-30 21:44:52,842 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-30 21:44:52,880 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-01-30 21:44:52,935 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-01-30 21:44:52,948 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-01-30 21:44:52,948 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-30 21:44:52,948 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-01-30 21:44:52,949 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-01-30 21:44:52,949 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-01-30 21:44:52,950 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2022-01-30 21:44:52,950 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-01-30 21:44:52,950 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-01-30 21:44:52,950 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2022-01-30 21:44:52,950 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2022-01-30 21:44:52,950 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-01-30 21:44:52,950 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-30 21:44:52,950 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-01-30 21:44:52,950 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-01-30 21:44:52,950 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-01-30 21:44:52,950 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-01-30 21:44:52,951 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-01-30 21:44:52,951 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-01-30 21:44:52,951 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-01-30 21:44:52,951 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-01-30 21:44:52,951 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-01-30 21:44:52,951 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-01-30 21:44:52,951 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-30 21:44:52,951 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-01-30 21:44:53,045 INFO L234 CfgBuilder]: Building ICFG [2022-01-30 21:44:53,071 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-30 21:44:53,201 INFO L275 CfgBuilder]: Performing block encoding [2022-01-30 21:44:53,205 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-30 21:44:53,205 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-01-30 21:44:53,206 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.01 09:44:53 BoogieIcfgContainer [2022-01-30 21:44:53,206 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-30 21:44:53,207 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-30 21:44:53,207 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-30 21:44:53,212 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-30 21:44:53,213 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 30.01 09:44:52" (1/3) ... [2022-01-30 21:44:53,213 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@bf9fcd7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.01 09:44:53, skipping insertion in model container [2022-01-30 21:44:53,213 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.01 09:44:52" (2/3) ... [2022-01-30 21:44:53,214 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@bf9fcd7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.01 09:44:53, skipping insertion in model container [2022-01-30 21:44:53,214 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.01 09:44:53" (3/3) ... [2022-01-30 21:44:53,215 INFO L111 eAbstractionObserver]: Analyzing ICFG array_of_struct_ptr_monotonic.i [2022-01-30 21:44:53,221 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-01-30 21:44:53,222 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-30 21:44:53,266 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-30 21:44:53,272 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2022-01-30 21:44:53,272 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-01-30 21:44:53,283 INFO L276 IsEmpty]: Start isEmpty. Operand has 26 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 19 states have internal predecessors, (26), 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) [2022-01-30 21:44:53,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-01-30 21:44:53,286 INFO L506 BasicCegarLoop]: Found error trace [2022-01-30 21:44:53,287 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-30 21:44:53,287 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-30 21:44:53,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-30 21:44:53,291 INFO L85 PathProgramCache]: Analyzing trace with hash 135807006, now seen corresponding path program 1 times [2022-01-30 21:44:53,297 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-30 21:44:53,297 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1203229322] [2022-01-30 21:44:53,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-30 21:44:53,298 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-30 21:44:53,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 21:44:53,450 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-30 21:44:53,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 21:44:53,469 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-30 21:44:53,469 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-30 21:44:53,470 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1203229322] [2022-01-30 21:44:53,471 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1203229322] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-30 21:44:53,471 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-30 21:44:53,471 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-30 21:44:53,473 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [598804289] [2022-01-30 21:44:53,473 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-30 21:44:53,476 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-30 21:44:53,477 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-30 21:44:53,495 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-30 21:44:53,495 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-30 21:44:53,497 INFO L87 Difference]: Start difference. First operand has 26 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 19 states have internal predecessors, (26), 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 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 2 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) [2022-01-30 21:44:53,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-30 21:44:53,559 INFO L93 Difference]: Finished difference Result 51 states and 68 transitions. [2022-01-30 21:44:53,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-30 21:44:53,562 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 2 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 [2022-01-30 21:44:53,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-30 21:44:53,567 INFO L225 Difference]: With dead ends: 51 [2022-01-30 21:44:53,567 INFO L226 Difference]: Without dead ends: 29 [2022-01-30 21:44:53,569 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-30 21:44:53,571 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 15 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-30 21:44:53,571 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 28 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-30 21:44:53,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2022-01-30 21:44:53,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 22. [2022-01-30 21:44:53,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 16 states have (on average 1.25) internal successors, (20), 16 states have internal predecessors, (20), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-30 21:44:53,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 25 transitions. [2022-01-30 21:44:53,594 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 25 transitions. Word has length 14 [2022-01-30 21:44:53,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-30 21:44:53,594 INFO L470 AbstractCegarLoop]: Abstraction has 22 states and 25 transitions. [2022-01-30 21:44:53,594 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 2 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) [2022-01-30 21:44:53,595 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 25 transitions. [2022-01-30 21:44:53,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-01-30 21:44:53,595 INFO L506 BasicCegarLoop]: Found error trace [2022-01-30 21:44:53,595 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-30 21:44:53,595 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-01-30 21:44:53,596 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-30 21:44:53,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-30 21:44:53,596 INFO L85 PathProgramCache]: Analyzing trace with hash -1045890869, now seen corresponding path program 1 times [2022-01-30 21:44:53,596 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-30 21:44:53,596 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1033601899] [2022-01-30 21:44:53,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-30 21:44:53,597 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-30 21:44:53,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 21:44:53,631 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-30 21:44:53,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 21:44:53,638 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-30 21:44:53,638 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-30 21:44:53,638 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1033601899] [2022-01-30 21:44:53,638 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1033601899] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-30 21:44:53,638 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-30 21:44:53,638 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-30 21:44:53,638 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1209452746] [2022-01-30 21:44:53,639 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-30 21:44:53,639 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-30 21:44:53,639 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-30 21:44:53,640 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-30 21:44:53,640 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-30 21:44:53,640 INFO L87 Difference]: Start difference. First operand 22 states and 25 transitions. Second operand has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 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) [2022-01-30 21:44:53,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-30 21:44:53,687 INFO L93 Difference]: Finished difference Result 43 states and 51 transitions. [2022-01-30 21:44:53,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-30 21:44:53,687 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 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 [2022-01-30 21:44:53,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-30 21:44:53,688 INFO L225 Difference]: With dead ends: 43 [2022-01-30 21:44:53,688 INFO L226 Difference]: Without dead ends: 31 [2022-01-30 21:44:53,689 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-01-30 21:44:53,689 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 13 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-30 21:44:53,690 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 32 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-30 21:44:53,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2022-01-30 21:44:53,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 23. [2022-01-30 21:44:53,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 17 states have internal predecessors, (21), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-30 21:44:53,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 26 transitions. [2022-01-30 21:44:53,694 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 26 transitions. Word has length 14 [2022-01-30 21:44:53,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-30 21:44:53,694 INFO L470 AbstractCegarLoop]: Abstraction has 23 states and 26 transitions. [2022-01-30 21:44:53,694 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 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) [2022-01-30 21:44:53,694 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 26 transitions. [2022-01-30 21:44:53,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-01-30 21:44:53,695 INFO L506 BasicCegarLoop]: Found error trace [2022-01-30 21:44:53,695 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-30 21:44:53,695 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-01-30 21:44:53,695 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-30 21:44:53,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-30 21:44:53,696 INFO L85 PathProgramCache]: Analyzing trace with hash 1435302576, now seen corresponding path program 1 times [2022-01-30 21:44:53,696 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-30 21:44:53,696 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1049489094] [2022-01-30 21:44:53,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-30 21:44:53,696 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-30 21:44:53,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 21:44:53,744 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-30 21:44:53,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 21:44:53,750 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-30 21:44:53,751 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-30 21:44:53,751 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1049489094] [2022-01-30 21:44:53,751 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1049489094] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-30 21:44:53,751 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1683794609] [2022-01-30 21:44:53,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-30 21:44:53,751 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-30 21:44:53,752 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-30 21:44:53,753 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-30 21:44:53,754 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-01-30 21:44:53,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 21:44:53,841 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 3 conjunts are in the unsatisfiable core [2022-01-30 21:44:53,845 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-30 21:44:53,913 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-30 21:44:53,913 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-30 21:44:53,979 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-30 21:44:53,980 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1683794609] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-30 21:44:53,980 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-30 21:44:53,980 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 8 [2022-01-30 21:44:53,980 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1520776113] [2022-01-30 21:44:53,980 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-30 21:44:53,981 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-01-30 21:44:53,981 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-30 21:44:53,982 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-01-30 21:44:53,983 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2022-01-30 21:44:53,983 INFO L87 Difference]: Start difference. First operand 23 states and 26 transitions. Second operand has 8 states, 8 states have (on average 3.25) internal successors, (26), 7 states have internal predecessors, (26), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-30 21:44:54,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-30 21:44:54,091 INFO L93 Difference]: Finished difference Result 63 states and 79 transitions. [2022-01-30 21:44:54,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-01-30 21:44:54,092 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.25) internal successors, (26), 7 states have internal predecessors, (26), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 18 [2022-01-30 21:44:54,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-30 21:44:54,094 INFO L225 Difference]: With dead ends: 63 [2022-01-30 21:44:54,094 INFO L226 Difference]: Without dead ends: 51 [2022-01-30 21:44:54,095 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2022-01-30 21:44:54,097 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 51 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 85 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-30 21:44:54,098 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [55 Valid, 55 Invalid, 85 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 64 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-30 21:44:54,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2022-01-30 21:44:54,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 35. [2022-01-30 21:44:54,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 29 states have (on average 1.2413793103448276) internal successors, (36), 29 states have internal predecessors, (36), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-30 21:44:54,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 41 transitions. [2022-01-30 21:44:54,107 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 41 transitions. Word has length 18 [2022-01-30 21:44:54,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-30 21:44:54,108 INFO L470 AbstractCegarLoop]: Abstraction has 35 states and 41 transitions. [2022-01-30 21:44:54,108 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.25) internal successors, (26), 7 states have internal predecessors, (26), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-30 21:44:54,108 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 41 transitions. [2022-01-30 21:44:54,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-30 21:44:54,109 INFO L506 BasicCegarLoop]: Found error trace [2022-01-30 21:44:54,109 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-30 21:44:54,155 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-01-30 21:44:54,325 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-30 21:44:54,326 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-30 21:44:54,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-30 21:44:54,327 INFO L85 PathProgramCache]: Analyzing trace with hash -2083708577, now seen corresponding path program 2 times [2022-01-30 21:44:54,327 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-30 21:44:54,327 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [964897051] [2022-01-30 21:44:54,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-30 21:44:54,328 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-30 21:44:54,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 21:44:54,506 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-30 21:44:54,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 21:44:54,515 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-30 21:44:54,517 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-30 21:44:54,517 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [964897051] [2022-01-30 21:44:54,517 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [964897051] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-30 21:44:54,518 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [868839764] [2022-01-30 21:44:54,518 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-30 21:44:54,518 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-30 21:44:54,519 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-30 21:44:54,527 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-30 21:44:54,549 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-01-30 21:44:54,660 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-30 21:44:54,660 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-30 21:44:54,661 INFO L263 TraceCheckSpWp]: Trace formula consists of 362 conjuncts, 6 conjunts are in the unsatisfiable core [2022-01-30 21:44:54,666 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-30 21:44:54,748 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-30 21:44:54,748 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-30 21:44:54,857 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-30 21:44:54,857 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [868839764] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-30 21:44:54,857 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-30 21:44:54,857 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 14 [2022-01-30 21:44:54,857 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1489774230] [2022-01-30 21:44:54,857 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-30 21:44:54,858 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-01-30 21:44:54,858 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-30 21:44:54,858 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-01-30 21:44:54,858 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2022-01-30 21:44:54,859 INFO L87 Difference]: Start difference. First operand 35 states and 41 transitions. Second operand has 14 states, 14 states have (on average 3.5714285714285716) internal successors, (50), 13 states have internal predecessors, (50), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-30 21:44:55,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-30 21:44:55,019 INFO L93 Difference]: Finished difference Result 117 states and 154 transitions. [2022-01-30 21:44:55,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-01-30 21:44:55,020 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.5714285714285716) internal successors, (50), 13 states have internal predecessors, (50), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 30 [2022-01-30 21:44:55,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-30 21:44:55,021 INFO L225 Difference]: With dead ends: 117 [2022-01-30 21:44:55,021 INFO L226 Difference]: Without dead ends: 105 [2022-01-30 21:44:55,022 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=94, Invalid=116, Unknown=0, NotChecked=0, Total=210 [2022-01-30 21:44:55,022 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 137 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 121 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 147 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 175 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 121 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-30 21:44:55,022 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [147 Valid, 92 Invalid, 175 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 121 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-30 21:44:55,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2022-01-30 21:44:55,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 59. [2022-01-30 21:44:55,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 53 states have (on average 1.2452830188679245) internal successors, (66), 53 states have internal predecessors, (66), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-30 21:44:55,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 71 transitions. [2022-01-30 21:44:55,029 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 71 transitions. Word has length 30 [2022-01-30 21:44:55,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-30 21:44:55,029 INFO L470 AbstractCegarLoop]: Abstraction has 59 states and 71 transitions. [2022-01-30 21:44:55,029 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.5714285714285716) internal successors, (50), 13 states have internal predecessors, (50), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-30 21:44:55,030 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 71 transitions. [2022-01-30 21:44:55,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-01-30 21:44:55,030 INFO L506 BasicCegarLoop]: Found error trace [2022-01-30 21:44:55,030 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-30 21:44:55,060 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-01-30 21:44:55,260 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2022-01-30 21:44:55,260 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-30 21:44:55,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-30 21:44:55,261 INFO L85 PathProgramCache]: Analyzing trace with hash -951549123, now seen corresponding path program 3 times [2022-01-30 21:44:55,261 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-30 21:44:55,261 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1918407386] [2022-01-30 21:44:55,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-30 21:44:55,261 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-30 21:44:55,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 21:44:55,519 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-30 21:44:55,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 21:44:55,531 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-30 21:44:55,531 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-30 21:44:55,531 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1918407386] [2022-01-30 21:44:55,531 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1918407386] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-30 21:44:55,532 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1177564689] [2022-01-30 21:44:55,532 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-30 21:44:55,532 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-30 21:44:55,534 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-30 21:44:55,535 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-30 21:44:55,567 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-01-30 21:53:03,867 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2022-01-30 21:53:03,868 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-30 21:53:04,172 INFO L263 TraceCheckSpWp]: Trace formula consists of 764 conjuncts, 12 conjunts are in the unsatisfiable core [2022-01-30 21:53:04,175 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-30 21:53:04,288 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-30 21:53:04,288 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-30 21:53:04,500 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-30 21:53:04,501 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1177564689] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-30 21:53:04,501 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-30 21:53:04,501 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 26 [2022-01-30 21:53:04,501 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1256614765] [2022-01-30 21:53:04,501 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-30 21:53:04,502 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-30 21:53:04,502 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-30 21:53:04,503 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-30 21:53:04,503 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2022-01-30 21:53:04,503 INFO L87 Difference]: Start difference. First operand 59 states and 71 transitions. Second operand has 26 states, 26 states have (on average 3.769230769230769) internal successors, (98), 25 states have internal predecessors, (98), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-30 21:53:04,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-30 21:53:04,772 INFO L93 Difference]: Finished difference Result 225 states and 304 transitions. [2022-01-30 21:53:04,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-01-30 21:53:04,772 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 3.769230769230769) internal successors, (98), 25 states have internal predecessors, (98), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 54 [2022-01-30 21:53:04,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-30 21:53:04,774 INFO L225 Difference]: With dead ends: 225 [2022-01-30 21:53:04,774 INFO L226 Difference]: Without dead ends: 213 [2022-01-30 21:53:04,775 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=328, Invalid=374, Unknown=0, NotChecked=0, Total=702 [2022-01-30 21:53:04,775 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 315 mSDsluCounter, 140 mSDsCounter, 0 mSdLazyCounter, 253 mSolverCounterSat, 125 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 337 SdHoareTripleChecker+Valid, 180 SdHoareTripleChecker+Invalid, 378 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 125 IncrementalHoareTripleChecker+Valid, 253 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-30 21:53:04,775 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [337 Valid, 180 Invalid, 378 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [125 Valid, 253 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-30 21:53:04,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2022-01-30 21:53:04,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 107. [2022-01-30 21:53:04,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 101 states have (on average 1.2475247524752475) internal successors, (126), 101 states have internal predecessors, (126), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-30 21:53:04,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 131 transitions. [2022-01-30 21:53:04,786 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 131 transitions. Word has length 54 [2022-01-30 21:53:04,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-30 21:53:04,787 INFO L470 AbstractCegarLoop]: Abstraction has 107 states and 131 transitions. [2022-01-30 21:53:04,787 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 3.769230769230769) internal successors, (98), 25 states have internal predecessors, (98), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-30 21:53:04,787 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 131 transitions. [2022-01-30 21:53:04,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-01-30 21:53:04,789 INFO L506 BasicCegarLoop]: Found error trace [2022-01-30 21:53:04,789 INFO L514 BasicCegarLoop]: trace histogram [22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-30 21:53:04,889 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-01-30 21:53:05,004 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-30 21:53:05,005 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-30 21:53:05,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-30 21:53:05,005 INFO L85 PathProgramCache]: Analyzing trace with hash -151217927, now seen corresponding path program 4 times [2022-01-30 21:53:05,006 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-30 21:53:05,006 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [276573425] [2022-01-30 21:53:05,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-30 21:53:05,006 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-30 21:53:05,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 21:53:05,413 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-30 21:53:05,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 21:53:05,418 INFO L134 CoverageAnalysis]: Checked inductivity of 946 backedges. 0 proven. 946 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-30 21:53:05,419 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-30 21:53:05,419 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [276573425] [2022-01-30 21:53:05,419 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [276573425] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-30 21:53:05,419 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1505861121] [2022-01-30 21:53:05,419 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-30 21:53:05,419 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-30 21:53:05,419 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-30 21:53:05,432 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-30 21:53:05,433 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-01-30 21:57:26,400 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-30 21:57:26,400 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-30 21:57:26,442 INFO L263 TraceCheckSpWp]: Trace formula consists of 1568 conjuncts, 24 conjunts are in the unsatisfiable core [2022-01-30 21:57:26,447 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-30 21:57:26,682 INFO L134 CoverageAnalysis]: Checked inductivity of 946 backedges. 0 proven. 946 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-30 21:57:26,682 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-30 21:57:27,351 INFO L134 CoverageAnalysis]: Checked inductivity of 946 backedges. 0 proven. 946 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-30 21:57:27,351 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1505861121] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-30 21:57:27,351 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-30 21:57:27,351 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 25, 25] total 50 [2022-01-30 21:57:27,351 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1246182390] [2022-01-30 21:57:27,352 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-30 21:57:27,352 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2022-01-30 21:57:27,352 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-30 21:57:27,353 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2022-01-30 21:57:27,354 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1178, Invalid=1272, Unknown=0, NotChecked=0, Total=2450 [2022-01-30 21:57:27,354 INFO L87 Difference]: Start difference. First operand 107 states and 131 transitions. Second operand has 50 states, 50 states have (on average 3.88) internal successors, (194), 49 states have internal predecessors, (194), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-30 21:57:27,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-30 21:57:27,967 INFO L93 Difference]: Finished difference Result 441 states and 604 transitions. [2022-01-30 21:57:27,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-01-30 21:57:27,968 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 3.88) internal successors, (194), 49 states have internal predecessors, (194), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 102 [2022-01-30 21:57:27,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-30 21:57:27,970 INFO L225 Difference]: With dead ends: 441 [2022-01-30 21:57:27,970 INFO L226 Difference]: Without dead ends: 429 [2022-01-30 21:57:27,971 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 231 GetRequests, 182 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1228, Invalid=1322, Unknown=0, NotChecked=0, Total=2550 [2022-01-30 21:57:27,971 INFO L933 BasicCegarLoop]: 64 mSDtfsCounter, 991 mSDsluCounter, 273 mSDsCounter, 0 mSdLazyCounter, 455 mSolverCounterSat, 417 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1037 SdHoareTripleChecker+Valid, 337 SdHoareTripleChecker+Invalid, 872 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 417 IncrementalHoareTripleChecker+Valid, 455 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-30 21:57:27,971 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1037 Valid, 337 Invalid, 872 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [417 Valid, 455 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-30 21:57:27,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 429 states. [2022-01-30 21:57:27,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 429 to 203. [2022-01-30 21:57:27,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 203 states, 197 states have (on average 1.248730964467005) internal successors, (246), 197 states have internal predecessors, (246), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-30 21:57:27,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203 states to 203 states and 251 transitions. [2022-01-30 21:57:27,987 INFO L78 Accepts]: Start accepts. Automaton has 203 states and 251 transitions. Word has length 102 [2022-01-30 21:57:27,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-30 21:57:27,988 INFO L470 AbstractCegarLoop]: Abstraction has 203 states and 251 transitions. [2022-01-30 21:57:27,988 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 3.88) internal successors, (194), 49 states have internal predecessors, (194), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-30 21:57:27,988 INFO L276 IsEmpty]: Start isEmpty. Operand 203 states and 251 transitions. [2022-01-30 21:57:27,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 199 [2022-01-30 21:57:27,993 INFO L506 BasicCegarLoop]: Found error trace [2022-01-30 21:57:27,993 INFO L514 BasicCegarLoop]: trace histogram [46, 46, 46, 46, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-30 21:57:28,060 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-01-30 21:57:28,215 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-30 21:57:28,215 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-30 21:57:28,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-30 21:57:28,216 INFO L85 PathProgramCache]: Analyzing trace with hash 853675121, now seen corresponding path program 5 times [2022-01-30 21:57:28,216 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-30 21:57:28,217 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [182623259] [2022-01-30 21:57:28,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-30 21:57:28,217 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-30 21:57:28,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 21:57:29,275 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-30 21:57:29,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 21:57:29,343 INFO L134 CoverageAnalysis]: Checked inductivity of 4186 backedges. 0 proven. 4186 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-30 21:57:29,343 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-30 21:57:29,343 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [182623259] [2022-01-30 21:57:29,343 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [182623259] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-30 21:57:29,344 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [195070116] [2022-01-30 21:57:29,344 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-30 21:57:29,344 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-30 21:57:29,344 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-30 21:57:29,345 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-30 21:57:29,346 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process