/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/AutomizerCInline.xml -s ../../../trunk/examples/settings/automizer/BvToInt/svcomp-Reach-64bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/reducercommutativity/sep60-2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-a10ec3b [2022-01-09 23:04:24,655 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-09 23:04:24,657 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-09 23:04:24,702 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-01-09 23:04:24,779 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-01-09 23:04:24,780 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-01-09 23:04:24,780 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-01-09 23:04:24,782 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/BvToInt/svcomp-Reach-64bit-Automizer_Default.epf [2022-01-09 23:04:24,816 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-09 23:04:24,816 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-09 23:04:24,816 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-01-09 23:04:24,817 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-01-09 23:04:24,818 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-01-09 23:04:24,818 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-01-09 23:04:24,818 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-01-09 23:04:24,818 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-01-09 23:04:24,818 INFO L138 SettingsManager]: * Use SBE=true [2022-01-09 23:04:24,819 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-09 23:04:24,820 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-09 23:04:24,820 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-09 23:04:24,820 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-09 23:04:24,820 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-09 23:04:24,820 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-09 23:04:24,820 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-01-09 23:04:24,820 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-09 23:04:24,820 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-09 23:04:24,821 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-09 23:04:24,821 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-09 23:04:24,821 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-09 23:04:24,821 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-09 23:04:24,821 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-09 23:04:24,821 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-01-09 23:04:24,821 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-01-09 23:04:24,821 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-01-09 23:04:24,822 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-01-09 23:04:24,822 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-01-09 23:04:24,822 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-01-09 23:04:24,822 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-01-09 23:04:24,822 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-01-09 23:04:25,030 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-09 23:04:25,049 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-09 23:04:25,051 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-09 23:04:25,052 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-09 23:04:25,052 INFO L275 PluginConnector]: CDTParser initialized [2022-01-09 23:04:25,053 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/reducercommutativity/sep60-2.i [2022-01-09 23:04:25,107 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/006b010bc/b9d79c0c0824413da4396206591c50fa/FLAG4ce525ab7 [2022-01-09 23:04:25,444 INFO L306 CDTParser]: Found 1 translation units. [2022-01-09 23:04:25,445 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/reducercommutativity/sep60-2.i [2022-01-09 23:04:25,450 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/006b010bc/b9d79c0c0824413da4396206591c50fa/FLAG4ce525ab7 [2022-01-09 23:04:25,871 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/006b010bc/b9d79c0c0824413da4396206591c50fa [2022-01-09 23:04:25,873 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-09 23:04:25,874 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-01-09 23:04:25,880 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-09 23:04:25,880 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-09 23:04:25,883 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-09 23:04:25,884 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.01 11:04:25" (1/1) ... [2022-01-09 23:04:25,885 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3bf005d0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 11:04:25, skipping insertion in model container [2022-01-09 23:04:25,885 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.01 11:04:25" (1/1) ... [2022-01-09 23:04:25,892 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-09 23:04:25,908 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-09 23:04:26,119 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/reducercommutativity/sep60-2.i[1293,1306] [2022-01-09 23:04:26,121 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-09 23:04:26,130 INFO L203 MainTranslator]: Completed pre-run [2022-01-09 23:04:26,162 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/reducercommutativity/sep60-2.i[1293,1306] [2022-01-09 23:04:26,165 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-09 23:04:26,176 INFO L208 MainTranslator]: Completed translation [2022-01-09 23:04:26,177 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 11:04:26 WrapperNode [2022-01-09 23:04:26,178 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-09 23:04:26,179 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-01-09 23:04:26,179 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-01-09 23:04:26,179 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-01-09 23:04:26,184 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 11:04:26" (1/1) ... [2022-01-09 23:04:26,200 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 11:04:26" (1/1) ... [2022-01-09 23:04:26,213 INFO L137 Inliner]: procedures = 16, calls = 22, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 67 [2022-01-09 23:04:26,214 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-01-09 23:04:26,214 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-09 23:04:26,214 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-09 23:04:26,214 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-09 23:04:26,220 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 11:04:26" (1/1) ... [2022-01-09 23:04:26,220 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 11:04:26" (1/1) ... [2022-01-09 23:04:26,222 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 11:04:26" (1/1) ... [2022-01-09 23:04:26,222 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 11:04:26" (1/1) ... [2022-01-09 23:04:26,227 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 11:04:26" (1/1) ... [2022-01-09 23:04:26,229 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 11:04:26" (1/1) ... [2022-01-09 23:04:26,230 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 11:04:26" (1/1) ... [2022-01-09 23:04:26,232 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-09 23:04:26,233 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-09 23:04:26,233 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-09 23:04:26,233 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-09 23:04:26,234 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 11:04:26" (1/1) ... [2022-01-09 23:04:26,239 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-09 23:04:26,252 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-09 23:04:26,264 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) [2022-01-09 23:04:26,275 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 [2022-01-09 23:04:26,300 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-09 23:04:26,301 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-01-09 23:04:26,301 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-01-09 23:04:26,301 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-01-09 23:04:26,301 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-09 23:04:26,301 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-09 23:04:26,301 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-01-09 23:04:26,302 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-01-09 23:04:26,302 INFO L130 BoogieDeclarations]: Found specification of procedure sep [2022-01-09 23:04:26,302 INFO L138 BoogieDeclarations]: Found implementation of procedure sep [2022-01-09 23:04:26,395 INFO L234 CfgBuilder]: Building ICFG [2022-01-09 23:04:26,397 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-09 23:04:26,549 INFO L275 CfgBuilder]: Performing block encoding [2022-01-09 23:04:26,556 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-09 23:04:26,556 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2022-01-09 23:04:26,557 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.01 11:04:26 BoogieIcfgContainer [2022-01-09 23:04:26,558 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-09 23:04:26,559 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-09 23:04:26,559 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-09 23:04:26,561 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-09 23:04:26,562 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.01 11:04:25" (1/3) ... [2022-01-09 23:04:26,562 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2556ba9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.01 11:04:26, skipping insertion in model container [2022-01-09 23:04:26,562 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 11:04:26" (2/3) ... [2022-01-09 23:04:26,563 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2556ba9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.01 11:04:26, skipping insertion in model container [2022-01-09 23:04:26,563 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.01 11:04:26" (3/3) ... [2022-01-09 23:04:26,564 INFO L111 eAbstractionObserver]: Analyzing ICFG sep60-2.i [2022-01-09 23:04:26,569 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-01-09 23:04:26,569 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-09 23:04:26,609 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-09 23:04:26,616 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 [2022-01-09 23:04:26,616 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-01-09 23:04:26,630 INFO L276 IsEmpty]: Start isEmpty. Operand has 27 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 22 states have internal predecessors, (30), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-09 23:04:26,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-01-09 23:04:26,635 INFO L506 BasicCegarLoop]: Found error trace [2022-01-09 23:04:26,636 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-09 23:04:26,636 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-09 23:04:26,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-09 23:04:26,641 INFO L85 PathProgramCache]: Analyzing trace with hash -1312709850, now seen corresponding path program 1 times [2022-01-09 23:04:26,649 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-09 23:04:26,650 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [90013960] [2022-01-09 23:04:26,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 23:04:26,651 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-09 23:04:26,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 23:04:26,838 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-09 23:04:26,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 23:04:26,855 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-01-09 23:04:26,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 23:04:26,871 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-01-09 23:04:26,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 23:04:26,891 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-01-09 23:04:26,892 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-09 23:04:26,892 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [90013960] [2022-01-09 23:04:26,893 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [90013960] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-09 23:04:26,894 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-09 23:04:26,894 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-09 23:04:26,895 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [679305419] [2022-01-09 23:04:26,896 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-09 23:04:26,900 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-09 23:04:26,900 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-09 23:04:26,934 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-09 23:04:26,936 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-09 23:04:26,938 INFO L87 Difference]: Start difference. First operand has 27 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 22 states have internal predecessors, (30), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 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 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-01-09 23:04:26,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-09 23:04:26,976 INFO L93 Difference]: Finished difference Result 52 states and 73 transitions. [2022-01-09 23:04:26,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-09 23:04:26,979 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 28 [2022-01-09 23:04:26,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-09 23:04:26,985 INFO L225 Difference]: With dead ends: 52 [2022-01-09 23:04:26,985 INFO L226 Difference]: Without dead ends: 25 [2022-01-09 23:04:26,988 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-09 23:04:26,992 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 1 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-09 23:04:26,993 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 58 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-09 23:04:27,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2022-01-09 23:04:27,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 24. [2022-01-09 23:04:27,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 19 states have (on average 1.2105263157894737) internal successors, (23), 19 states have internal predecessors, (23), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-09 23:04:27,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 29 transitions. [2022-01-09 23:04:27,028 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 29 transitions. Word has length 28 [2022-01-09 23:04:27,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-09 23:04:27,028 INFO L470 AbstractCegarLoop]: Abstraction has 24 states and 29 transitions. [2022-01-09 23:04:27,029 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-01-09 23:04:27,029 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 29 transitions. [2022-01-09 23:04:27,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-09 23:04:27,034 INFO L506 BasicCegarLoop]: Found error trace [2022-01-09 23:04:27,034 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-09 23:04:27,034 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-01-09 23:04:27,035 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-09 23:04:27,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-09 23:04:27,036 INFO L85 PathProgramCache]: Analyzing trace with hash 1845794557, now seen corresponding path program 1 times [2022-01-09 23:04:27,036 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-09 23:04:27,036 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [327364011] [2022-01-09 23:04:27,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 23:04:27,038 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-09 23:04:27,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 23:04:27,112 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-01-09 23:04:27,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 23:04:27,139 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-01-09 23:04:27,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 23:04:27,161 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-01-09 23:04:27,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 23:04:27,177 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-01-09 23:04:27,177 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-09 23:04:27,178 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [327364011] [2022-01-09 23:04:27,179 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [327364011] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-09 23:04:27,180 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [179565184] [2022-01-09 23:04:27,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 23:04:27,180 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-09 23:04:27,180 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-09 23:04:27,187 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) [2022-01-09 23:04:27,189 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-01-09 23:04:27,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 23:04:27,279 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-09 23:04:27,284 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-09 23:04:27,372 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-01-09 23:04:27,372 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-09 23:04:27,373 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [179565184] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-09 23:04:27,376 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-01-09 23:04:27,377 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2022-01-09 23:04:27,377 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [153258181] [2022-01-09 23:04:27,378 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-09 23:04:27,380 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-09 23:04:27,380 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-09 23:04:27,380 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-09 23:04:27,381 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-01-09 23:04:27,381 INFO L87 Difference]: Start difference. First operand 24 states and 29 transitions. Second operand has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-09 23:04:27,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-09 23:04:27,397 INFO L93 Difference]: Finished difference Result 45 states and 58 transitions. [2022-01-09 23:04:27,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-09 23:04:27,398 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 30 [2022-01-09 23:04:27,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-09 23:04:27,398 INFO L225 Difference]: With dead ends: 45 [2022-01-09 23:04:27,398 INFO L226 Difference]: Without dead ends: 27 [2022-01-09 23:04:27,399 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-01-09 23:04:27,400 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 3 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-09 23:04:27,401 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 50 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-09 23:04:27,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2022-01-09 23:04:27,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 25. [2022-01-09 23:04:27,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 20 states have (on average 1.2) internal successors, (24), 20 states have internal predecessors, (24), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-09 23:04:27,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 30 transitions. [2022-01-09 23:04:27,406 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 30 transitions. Word has length 30 [2022-01-09 23:04:27,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-09 23:04:27,406 INFO L470 AbstractCegarLoop]: Abstraction has 25 states and 30 transitions. [2022-01-09 23:04:27,406 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-09 23:04:27,406 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 30 transitions. [2022-01-09 23:04:27,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-01-09 23:04:27,407 INFO L506 BasicCegarLoop]: Found error trace [2022-01-09 23:04:27,407 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-09 23:04:27,439 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-01-09 23:04:27,623 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-09 23:04:27,624 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-09 23:04:27,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-09 23:04:27,624 INFO L85 PathProgramCache]: Analyzing trace with hash -701057785, now seen corresponding path program 1 times [2022-01-09 23:04:27,624 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-09 23:04:27,625 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2072820077] [2022-01-09 23:04:27,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 23:04:27,625 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-09 23:04:27,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 23:04:27,670 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-01-09 23:04:27,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 23:04:27,719 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-01-09 23:04:27,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 23:04:27,738 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-01-09 23:04:27,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 23:04:27,760 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-01-09 23:04:27,761 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-09 23:04:27,761 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2072820077] [2022-01-09 23:04:27,761 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2072820077] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-09 23:04:27,763 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [457492738] [2022-01-09 23:04:27,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 23:04:27,764 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-09 23:04:27,764 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-09 23:04:27,765 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) [2022-01-09 23:04:27,768 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-01-09 23:04:27,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 23:04:27,831 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-09 23:04:27,833 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-09 23:04:27,893 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-01-09 23:04:27,894 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-09 23:04:27,894 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [457492738] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-09 23:04:27,894 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-01-09 23:04:27,894 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2022-01-09 23:04:27,894 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [360204423] [2022-01-09 23:04:27,894 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-09 23:04:27,895 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-09 23:04:27,895 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-09 23:04:27,895 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-09 23:04:27,895 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-01-09 23:04:27,896 INFO L87 Difference]: Start difference. First operand 25 states and 30 transitions. Second operand has 3 states, 3 states have (on average 8.666666666666666) internal successors, (26), 3 states have internal predecessors, (26), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-09 23:04:27,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-09 23:04:27,905 INFO L93 Difference]: Finished difference Result 41 states and 48 transitions. [2022-01-09 23:04:27,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-09 23:04:27,906 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.666666666666666) internal successors, (26), 3 states have internal predecessors, (26), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 39 [2022-01-09 23:04:27,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-09 23:04:27,906 INFO L225 Difference]: With dead ends: 41 [2022-01-09 23:04:27,906 INFO L226 Difference]: Without dead ends: 27 [2022-01-09 23:04:27,907 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-01-09 23:04:27,908 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 1 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-09 23:04:27,908 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 49 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-09 23:04:27,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2022-01-09 23:04:27,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 26. [2022-01-09 23:04:27,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 21 states have (on average 1.1904761904761905) internal successors, (25), 21 states have internal predecessors, (25), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-09 23:04:27,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 31 transitions. [2022-01-09 23:04:27,913 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 31 transitions. Word has length 39 [2022-01-09 23:04:27,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-09 23:04:27,914 INFO L470 AbstractCegarLoop]: Abstraction has 26 states and 31 transitions. [2022-01-09 23:04:27,914 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.666666666666666) internal successors, (26), 3 states have internal predecessors, (26), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-09 23:04:27,914 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 31 transitions. [2022-01-09 23:04:27,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-01-09 23:04:27,915 INFO L506 BasicCegarLoop]: Found error trace [2022-01-09 23:04:27,915 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-09 23:04:27,942 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-01-09 23:04:28,138 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2022-01-09 23:04:28,139 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-09 23:04:28,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-09 23:04:28,139 INFO L85 PathProgramCache]: Analyzing trace with hash -235909079, now seen corresponding path program 1 times [2022-01-09 23:04:28,139 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-09 23:04:28,139 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [744589379] [2022-01-09 23:04:28,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 23:04:28,140 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-09 23:04:28,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 23:04:28,173 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-01-09 23:04:28,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 23:04:28,205 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-01-09 23:04:28,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 23:04:28,220 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-01-09 23:04:28,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 23:04:28,239 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-01-09 23:04:28,239 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-09 23:04:28,239 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [744589379] [2022-01-09 23:04:28,240 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [744589379] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-09 23:04:28,240 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1106535882] [2022-01-09 23:04:28,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 23:04:28,240 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-09 23:04:28,240 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-09 23:04:28,242 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) [2022-01-09 23:04:28,244 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-01-09 23:04:28,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 23:04:28,310 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 3 conjunts are in the unsatisfiable core [2022-01-09 23:04:28,315 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-09 23:04:28,409 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2022-01-09 23:04:28,410 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-09 23:04:28,505 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2022-01-09 23:04:28,506 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1106535882] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-09 23:04:28,506 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-09 23:04:28,506 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 4, 4] total 9 [2022-01-09 23:04:28,506 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2086488322] [2022-01-09 23:04:28,506 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-09 23:04:28,507 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-01-09 23:04:28,507 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-09 23:04:28,507 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-01-09 23:04:28,508 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2022-01-09 23:04:28,508 INFO L87 Difference]: Start difference. First operand 26 states and 31 transitions. Second operand has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 9 states have internal predecessors, (40), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2022-01-09 23:04:28,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-09 23:04:28,558 INFO L93 Difference]: Finished difference Result 58 states and 76 transitions. [2022-01-09 23:04:28,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-01-09 23:04:28,559 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 9 states have internal predecessors, (40), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 41 [2022-01-09 23:04:28,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-09 23:04:28,559 INFO L225 Difference]: With dead ends: 58 [2022-01-09 23:04:28,560 INFO L226 Difference]: Without dead ends: 37 [2022-01-09 23:04:28,560 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2022-01-09 23:04:28,561 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 12 mSDsluCounter, 132 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 156 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-09 23:04:28,562 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 156 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-09 23:04:28,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2022-01-09 23:04:28,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 35. [2022-01-09 23:04:28,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 30 states have (on average 1.1666666666666667) internal successors, (35), 30 states have internal predecessors, (35), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-09 23:04:28,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 41 transitions. [2022-01-09 23:04:28,568 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 41 transitions. Word has length 41 [2022-01-09 23:04:28,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-09 23:04:28,568 INFO L470 AbstractCegarLoop]: Abstraction has 35 states and 41 transitions. [2022-01-09 23:04:28,568 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 9 states have internal predecessors, (40), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2022-01-09 23:04:28,568 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 41 transitions. [2022-01-09 23:04:28,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-01-09 23:04:28,570 INFO L506 BasicCegarLoop]: Found error trace [2022-01-09 23:04:28,570 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-09 23:04:28,587 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-01-09 23:04:28,775 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-09 23:04:28,776 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-09 23:04:28,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-09 23:04:28,776 INFO L85 PathProgramCache]: Analyzing trace with hash 1946429025, now seen corresponding path program 2 times [2022-01-09 23:04:28,776 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-09 23:04:28,776 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [760938388] [2022-01-09 23:04:28,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 23:04:28,777 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-09 23:04:28,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 23:04:28,879 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-01-09 23:04:28,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 23:04:28,896 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-01-09 23:04:28,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 23:04:28,906 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2022-01-09 23:04:28,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 23:04:28,936 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 94 trivial. 0 not checked. [2022-01-09 23:04:28,936 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-09 23:04:28,936 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [760938388] [2022-01-09 23:04:28,936 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [760938388] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-09 23:04:28,937 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2138951966] [2022-01-09 23:04:28,937 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-09 23:04:28,937 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-09 23:04:28,937 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-09 23:04:28,938 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) [2022-01-09 23:04:28,939 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-01-09 23:04:29,041 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-09 23:04:29,042 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-09 23:04:29,043 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 6 conjunts are in the unsatisfiable core [2022-01-09 23:04:29,045 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-09 23:04:29,176 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2022-01-09 23:04:29,177 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-09 23:04:29,322 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2022-01-09 23:04:29,323 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2138951966] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-09 23:04:29,323 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-09 23:04:29,323 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 7, 7] total 14 [2022-01-09 23:04:29,323 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [987938668] [2022-01-09 23:04:29,323 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-09 23:04:29,324 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-01-09 23:04:29,324 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-09 23:04:29,324 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-01-09 23:04:29,325 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2022-01-09 23:04:29,325 INFO L87 Difference]: Start difference. First operand 35 states and 41 transitions. Second operand has 14 states, 14 states have (on average 3.7857142857142856) internal successors, (53), 14 states have internal predecessors, (53), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-01-09 23:04:29,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-09 23:04:29,375 INFO L93 Difference]: Finished difference Result 74 states and 92 transitions. [2022-01-09 23:04:29,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-01-09 23:04:29,376 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.7857142857142856) internal successors, (53), 14 states have internal predecessors, (53), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 56 [2022-01-09 23:04:29,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-09 23:04:29,377 INFO L225 Difference]: With dead ends: 74 [2022-01-09 23:04:29,377 INFO L226 Difference]: Without dead ends: 50 [2022-01-09 23:04:29,377 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 108 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2022-01-09 23:04:29,378 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 17 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 111 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-09 23:04:29,378 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 111 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-09 23:04:29,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2022-01-09 23:04:29,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 49. [2022-01-09 23:04:29,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 44 states have (on average 1.1136363636363635) internal successors, (49), 44 states have internal predecessors, (49), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-09 23:04:29,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 55 transitions. [2022-01-09 23:04:29,385 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 55 transitions. Word has length 56 [2022-01-09 23:04:29,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-09 23:04:29,385 INFO L470 AbstractCegarLoop]: Abstraction has 49 states and 55 transitions. [2022-01-09 23:04:29,385 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.7857142857142856) internal successors, (53), 14 states have internal predecessors, (53), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-01-09 23:04:29,385 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 55 transitions. [2022-01-09 23:04:29,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-01-09 23:04:29,386 INFO L506 BasicCegarLoop]: Found error trace [2022-01-09 23:04:29,387 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 6, 6, 6, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-09 23:04:29,411 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-01-09 23:04:29,607 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-09 23:04:29,607 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-09 23:04:29,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-09 23:04:29,608 INFO L85 PathProgramCache]: Analyzing trace with hash 1341839115, now seen corresponding path program 3 times [2022-01-09 23:04:29,608 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-09 23:04:29,608 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1351806246] [2022-01-09 23:04:29,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 23:04:29,609 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-09 23:04:29,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 23:04:29,742 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-01-09 23:04:29,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 23:04:29,755 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-01-09 23:04:29,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 23:04:29,763 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-01-09 23:04:29,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 23:04:29,770 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2022-01-09 23:04:29,771 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-09 23:04:29,771 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1351806246] [2022-01-09 23:04:29,771 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1351806246] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-09 23:04:29,771 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [162684362] [2022-01-09 23:04:29,771 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-09 23:04:29,771 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-09 23:04:29,772 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-09 23:04:29,773 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) [2022-01-09 23:04:29,783 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-01-09 23:04:29,841 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-09 23:04:29,841 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-09 23:04:29,842 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-09 23:04:29,845 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-09 23:04:29,967 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 40 proven. 5 refuted. 0 times theorem prover too weak. 137 trivial. 0 not checked. [2022-01-09 23:04:29,967 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-09 23:04:30,086 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 40 proven. 5 refuted. 0 times theorem prover too weak. 137 trivial. 0 not checked. [2022-01-09 23:04:30,087 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [162684362] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-09 23:04:30,087 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-09 23:04:30,087 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 5, 5] total 19 [2022-01-09 23:04:30,087 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [775765547] [2022-01-09 23:04:30,088 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-09 23:04:30,088 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-09 23:04:30,088 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-09 23:04:30,089 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-09 23:04:30,089 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=237, Unknown=0, NotChecked=0, Total=342 [2022-01-09 23:04:30,089 INFO L87 Difference]: Start difference. First operand 49 states and 55 transitions. Second operand has 19 states, 19 states have (on average 3.526315789473684) internal successors, (67), 19 states have internal predecessors, (67), 2 states have call successors, (6), 1 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-01-09 23:04:30,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-09 23:04:30,147 INFO L93 Difference]: Finished difference Result 90 states and 113 transitions. [2022-01-09 23:04:30,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-01-09 23:04:30,150 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.526315789473684) internal successors, (67), 19 states have internal predecessors, (67), 2 states have call successors, (6), 1 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 70 [2022-01-09 23:04:30,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-09 23:04:30,151 INFO L225 Difference]: With dead ends: 90 [2022-01-09 23:04:30,151 INFO L226 Difference]: Without dead ends: 64 [2022-01-09 23:04:30,152 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 140 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=105, Invalid=237, Unknown=0, NotChecked=0, Total=342 [2022-01-09 23:04:30,153 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 42 mSDsluCounter, 94 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 118 SdHoareTripleChecker+Invalid, 59 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-09 23:04:30,153 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [42 Valid, 118 Invalid, 59 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-09 23:04:30,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2022-01-09 23:04:30,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 63. [2022-01-09 23:04:30,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 58 states have (on average 1.1551724137931034) internal successors, (67), 58 states have internal predecessors, (67), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-09 23:04:30,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 73 transitions. [2022-01-09 23:04:30,159 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 73 transitions. Word has length 70 [2022-01-09 23:04:30,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-09 23:04:30,160 INFO L470 AbstractCegarLoop]: Abstraction has 63 states and 73 transitions. [2022-01-09 23:04:30,160 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 3.526315789473684) internal successors, (67), 19 states have internal predecessors, (67), 2 states have call successors, (6), 1 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-01-09 23:04:30,160 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 73 transitions. [2022-01-09 23:04:30,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2022-01-09 23:04:30,161 INFO L506 BasicCegarLoop]: Found error trace [2022-01-09 23:04:30,161 INFO L514 BasicCegarLoop]: trace histogram [18, 18, 18, 11, 11, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-09 23:04:30,178 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-01-09 23:04:30,364 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-09 23:04:30,365 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-09 23:04:30,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-09 23:04:30,365 INFO L85 PathProgramCache]: Analyzing trace with hash 2138241293, now seen corresponding path program 4 times [2022-01-09 23:04:30,365 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-09 23:04:30,365 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [689644687] [2022-01-09 23:04:30,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 23:04:30,366 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-09 23:04:30,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 23:04:30,533 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-01-09 23:04:30,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 23:04:30,551 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2022-01-09 23:04:30,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 23:04:30,563 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2022-01-09 23:04:30,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 23:04:30,584 INFO L134 CoverageAnalysis]: Checked inductivity of 653 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 532 trivial. 0 not checked. [2022-01-09 23:04:30,585 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-09 23:04:30,585 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [689644687] [2022-01-09 23:04:30,585 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [689644687] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-09 23:04:30,585 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [461284638] [2022-01-09 23:04:30,585 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-09 23:04:30,585 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-09 23:04:30,585 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-09 23:04:30,586 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-09 23:04:30,615 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-01-09 23:04:30,706 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-09 23:04:30,707 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-09 23:04:30,709 INFO L263 TraceCheckSpWp]: Trace formula consists of 402 conjuncts, 13 conjunts are in the unsatisfiable core [2022-01-09 23:04:30,712 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-09 23:04:30,864 INFO L134 CoverageAnalysis]: Checked inductivity of 653 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 532 trivial. 0 not checked. [2022-01-09 23:04:30,865 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-09 23:04:31,197 INFO L134 CoverageAnalysis]: Checked inductivity of 653 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 532 trivial. 0 not checked. [2022-01-09 23:04:31,198 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [461284638] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-09 23:04:31,198 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-09 23:04:31,198 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 27 [2022-01-09 23:04:31,198 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1672481869] [2022-01-09 23:04:31,198 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-09 23:04:31,199 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-01-09 23:04:31,199 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-09 23:04:31,199 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-01-09 23:04:31,200 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2022-01-09 23:04:31,200 INFO L87 Difference]: Start difference. First operand 63 states and 73 transitions. Second operand has 27 states, 27 states have (on average 2.7777777777777777) internal successors, (75), 27 states have internal predecessors, (75), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2022-01-09 23:04:31,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-09 23:04:31,271 INFO L93 Difference]: Finished difference Result 127 states and 159 transitions. [2022-01-09 23:04:31,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-01-09 23:04:31,271 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.7777777777777777) internal successors, (75), 27 states have internal predecessors, (75), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 108 [2022-01-09 23:04:31,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-09 23:04:31,272 INFO L225 Difference]: With dead ends: 127 [2022-01-09 23:04:31,272 INFO L226 Difference]: Without dead ends: 89 [2022-01-09 23:04:31,273 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 234 GetRequests, 209 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2022-01-09 23:04:31,273 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 36 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-09 23:04:31,274 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 74 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-09 23:04:31,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2022-01-09 23:04:31,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 89. [2022-01-09 23:04:31,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 84 states have (on average 1.1071428571428572) internal successors, (93), 84 states have internal predecessors, (93), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-09 23:04:31,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 99 transitions. [2022-01-09 23:04:31,282 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 99 transitions. Word has length 108 [2022-01-09 23:04:31,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-09 23:04:31,282 INFO L470 AbstractCegarLoop]: Abstraction has 89 states and 99 transitions. [2022-01-09 23:04:31,282 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.7777777777777777) internal successors, (75), 27 states have internal predecessors, (75), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2022-01-09 23:04:31,283 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 99 transitions. [2022-01-09 23:04:31,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2022-01-09 23:04:31,284 INFO L506 BasicCegarLoop]: Found error trace [2022-01-09 23:04:31,284 INFO L514 BasicCegarLoop]: trace histogram [24, 24, 18, 18, 18, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-09 23:04:31,310 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-01-09 23:04:31,508 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-09 23:04:31,508 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-09 23:04:31,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-09 23:04:31,509 INFO L85 PathProgramCache]: Analyzing trace with hash 819840039, now seen corresponding path program 5 times [2022-01-09 23:04:31,509 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-09 23:04:31,509 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [525897459] [2022-01-09 23:04:31,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 23:04:31,509 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-09 23:04:31,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 23:04:31,895 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2022-01-09 23:04:31,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 23:04:31,906 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2022-01-09 23:04:31,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 23:04:31,917 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 107 [2022-01-09 23:04:31,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 23:04:31,929 INFO L134 CoverageAnalysis]: Checked inductivity of 1108 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 532 trivial. 0 not checked. [2022-01-09 23:04:31,929 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-09 23:04:31,929 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [525897459] [2022-01-09 23:04:31,929 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [525897459] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-09 23:04:31,929 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1633366145] [2022-01-09 23:04:31,930 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-09 23:04:31,930 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-09 23:04:31,930 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-09 23:04:31,931 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-09 23:04:31,960 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-01-09 23:04:33,050 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 24 check-sat command(s) [2022-01-09 23:04:33,050 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-09 23:04:33,058 INFO L263 TraceCheckSpWp]: Trace formula consists of 459 conjuncts, 8 conjunts are in the unsatisfiable core [2022-01-09 23:04:33,061 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-09 23:04:33,338 INFO L134 CoverageAnalysis]: Checked inductivity of 1108 backedges. 244 proven. 51 refuted. 0 times theorem prover too weak. 813 trivial. 0 not checked. [2022-01-09 23:04:33,339 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-09 23:04:33,629 INFO L134 CoverageAnalysis]: Checked inductivity of 1108 backedges. 0 proven. 299 refuted. 0 times theorem prover too weak. 809 trivial. 0 not checked. [2022-01-09 23:04:33,629 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1633366145] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-09 23:04:33,629 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-09 23:04:33,629 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 9, 9] total 41 [2022-01-09 23:04:33,630 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1945449437] [2022-01-09 23:04:33,630 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-09 23:04:33,631 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-01-09 23:04:33,631 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-09 23:04:33,632 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-01-09 23:04:33,633 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=470, Invalid=1170, Unknown=0, NotChecked=0, Total=1640 [2022-01-09 23:04:33,633 INFO L87 Difference]: Start difference. First operand 89 states and 99 transitions. Second operand has 41 states, 41 states have (on average 2.8780487804878048) internal successors, (118), 41 states have internal predecessors, (118), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 2 states have call successors, (6) [2022-01-09 23:04:33,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-09 23:04:33,758 INFO L93 Difference]: Finished difference Result 154 states and 193 transitions. [2022-01-09 23:04:33,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-01-09 23:04:33,759 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 2.8780487804878048) internal successors, (118), 41 states have internal predecessors, (118), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 2 states have call successors, (6) Word has length 134 [2022-01-09 23:04:33,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-09 23:04:33,760 INFO L225 Difference]: With dead ends: 154 [2022-01-09 23:04:33,760 INFO L226 Difference]: Without dead ends: 116 [2022-01-09 23:04:33,761 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 299 GetRequests, 260 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 336 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=470, Invalid=1170, Unknown=0, NotChecked=0, Total=1640 [2022-01-09 23:04:33,762 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 88 mSDsluCounter, 170 mSDsCounter, 0 mSdLazyCounter, 102 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 194 SdHoareTripleChecker+Invalid, 116 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 102 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-09 23:04:33,762 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [88 Valid, 194 Invalid, 116 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 102 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-09 23:04:33,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2022-01-09 23:04:33,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 115. [2022-01-09 23:04:33,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 110 states have (on average 1.1545454545454545) internal successors, (127), 110 states have internal predecessors, (127), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-09 23:04:33,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 133 transitions. [2022-01-09 23:04:33,777 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 133 transitions. Word has length 134 [2022-01-09 23:04:33,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-09 23:04:33,777 INFO L470 AbstractCegarLoop]: Abstraction has 115 states and 133 transitions. [2022-01-09 23:04:33,777 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 2.8780487804878048) internal successors, (118), 41 states have internal predecessors, (118), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 2 states have call successors, (6) [2022-01-09 23:04:33,777 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 133 transitions. [2022-01-09 23:04:33,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 209 [2022-01-09 23:04:33,779 INFO L506 BasicCegarLoop]: Found error trace [2022-01-09 23:04:33,779 INFO L514 BasicCegarLoop]: trace histogram [42, 42, 42, 25, 25, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-09 23:04:33,805 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-01-09 23:04:33,980 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-09 23:04:33,980 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-09 23:04:33,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-09 23:04:33,980 INFO L85 PathProgramCache]: Analyzing trace with hash 412352681, now seen corresponding path program 6 times [2022-01-09 23:04:33,980 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-09 23:04:33,981 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [846769672] [2022-01-09 23:04:33,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 23:04:33,981 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-09 23:04:34,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 23:04:34,381 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2022-01-09 23:04:34,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 23:04:34,404 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 102 [2022-01-09 23:04:34,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 23:04:34,422 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 157 [2022-01-09 23:04:34,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 23:04:34,449 INFO L134 CoverageAnalysis]: Checked inductivity of 3353 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 2728 trivial. 0 not checked. [2022-01-09 23:04:34,449 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-09 23:04:34,449 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [846769672] [2022-01-09 23:04:34,449 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [846769672] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-09 23:04:34,449 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [898566030] [2022-01-09 23:04:34,449 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-09 23:04:34,450 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-09 23:04:34,450 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-09 23:04:34,451 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-09 23:04:34,451 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-01-09 23:04:34,566 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-01-09 23:04:34,566 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-09 23:04:34,568 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-09 23:04:34,571 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-09 23:04:34,863 INFO L134 CoverageAnalysis]: Checked inductivity of 3353 backedges. 1242 proven. 4 refuted. 0 times theorem prover too weak. 2107 trivial. 0 not checked. [2022-01-09 23:04:34,863 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-09 23:04:35,104 INFO L134 CoverageAnalysis]: Checked inductivity of 3353 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3349 trivial. 0 not checked. [2022-01-09 23:04:35,104 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [898566030] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-09 23:04:35,104 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-09 23:04:35,105 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 5, 5] total 34 [2022-01-09 23:04:35,105 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [13627622] [2022-01-09 23:04:35,105 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-09 23:04:35,105 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-01-09 23:04:35,105 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-09 23:04:35,106 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-01-09 23:04:35,106 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=405, Invalid=717, Unknown=0, NotChecked=0, Total=1122 [2022-01-09 23:04:35,107 INFO L87 Difference]: Start difference. First operand 115 states and 133 transitions. Second operand has 34 states, 34 states have (on average 2.735294117647059) internal successors, (93), 34 states have internal predecessors, (93), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-01-09 23:04:35,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-09 23:04:35,213 INFO L93 Difference]: Finished difference Result 188 states and 228 transitions. [2022-01-09 23:04:35,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-01-09 23:04:35,213 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.735294117647059) internal successors, (93), 34 states have internal predecessors, (93), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 208 [2022-01-09 23:04:35,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-09 23:04:35,214 INFO L225 Difference]: With dead ends: 188 [2022-01-09 23:04:35,214 INFO L226 Difference]: Without dead ends: 126 [2022-01-09 23:04:35,215 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 448 GetRequests, 416 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 150 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=405, Invalid=717, Unknown=0, NotChecked=0, Total=1122 [2022-01-09 23:04:35,216 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 35 mSDsluCounter, 175 mSDsCounter, 0 mSdLazyCounter, 92 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 199 SdHoareTripleChecker+Invalid, 102 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 92 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-09 23:04:35,216 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [35 Valid, 199 Invalid, 102 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 92 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-09 23:04:35,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2022-01-09 23:04:35,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 125. [2022-01-09 23:04:35,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 120 states have (on average 1.1416666666666666) internal successors, (137), 120 states have internal predecessors, (137), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-09 23:04:35,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 143 transitions. [2022-01-09 23:04:35,223 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 143 transitions. Word has length 208 [2022-01-09 23:04:35,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-09 23:04:35,224 INFO L470 AbstractCegarLoop]: Abstraction has 125 states and 143 transitions. [2022-01-09 23:04:35,224 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 2.735294117647059) internal successors, (93), 34 states have internal predecessors, (93), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-01-09 23:04:35,224 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 143 transitions. [2022-01-09 23:04:35,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 219 [2022-01-09 23:04:35,226 INFO L506 BasicCegarLoop]: Found error trace [2022-01-09 23:04:35,226 INFO L514 BasicCegarLoop]: trace histogram [42, 42, 42, 26, 26, 6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-09 23:04:35,253 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-01-09 23:04:35,446 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2022-01-09 23:04:35,447 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-09 23:04:35,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-09 23:04:35,447 INFO L85 PathProgramCache]: Analyzing trace with hash 559440675, now seen corresponding path program 7 times [2022-01-09 23:04:35,447 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-09 23:04:35,447 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1436438420] [2022-01-09 23:04:35,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 23:04:35,448 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-09 23:04:35,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 23:04:35,856 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-01-09 23:04:35,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 23:04:35,873 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2022-01-09 23:04:35,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 23:04:35,889 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 167 [2022-01-09 23:04:35,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 23:04:35,906 INFO L134 CoverageAnalysis]: Checked inductivity of 3436 backedges. 0 proven. 676 refuted. 0 times theorem prover too weak. 2760 trivial. 0 not checked. [2022-01-09 23:04:35,906 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-09 23:04:35,906 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1436438420] [2022-01-09 23:04:35,906 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1436438420] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-09 23:04:35,906 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1871555921] [2022-01-09 23:04:35,907 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-09 23:04:35,907 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-09 23:04:35,907 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-09 23:04:35,908 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-09 23:04:35,909 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-01-09 23:04:36,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 23:04:36,083 INFO L263 TraceCheckSpWp]: Trace formula consists of 781 conjuncts, 28 conjunts are in the unsatisfiable core [2022-01-09 23:04:36,087 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-09 23:04:36,380 INFO L134 CoverageAnalysis]: Checked inductivity of 3436 backedges. 0 proven. 676 refuted. 0 times theorem prover too weak. 2760 trivial. 0 not checked. [2022-01-09 23:04:36,380 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-09 23:04:37,388 INFO L134 CoverageAnalysis]: Checked inductivity of 3436 backedges. 0 proven. 676 refuted. 0 times theorem prover too weak. 2760 trivial. 0 not checked. [2022-01-09 23:04:37,388 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1871555921] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-09 23:04:37,389 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-09 23:04:37,389 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29, 29] total 57 [2022-01-09 23:04:37,389 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [781957551] [2022-01-09 23:04:37,389 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-09 23:04:37,389 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2022-01-09 23:04:37,390 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-09 23:04:37,390 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2022-01-09 23:04:37,392 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1596, Invalid=1596, Unknown=0, NotChecked=0, Total=3192 [2022-01-09 23:04:37,392 INFO L87 Difference]: Start difference. First operand 125 states and 143 transitions. Second operand has 57 states, 57 states have (on average 2.3684210526315788) internal successors, (135), 57 states have internal predecessors, (135), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2022-01-09 23:04:37,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-09 23:04:37,537 INFO L93 Difference]: Finished difference Result 251 states and 314 transitions. [2022-01-09 23:04:37,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2022-01-09 23:04:37,537 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 57 states have (on average 2.3684210526315788) internal successors, (135), 57 states have internal predecessors, (135), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 218 [2022-01-09 23:04:37,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-09 23:04:37,540 INFO L225 Difference]: With dead ends: 251 [2022-01-09 23:04:37,540 INFO L226 Difference]: Without dead ends: 181 [2022-01-09 23:04:37,542 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 469 GetRequests, 414 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1596, Invalid=1596, Unknown=0, NotChecked=0, Total=3192 [2022-01-09 23:04:37,543 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 81 mSDsluCounter, 144 mSDsCounter, 0 mSdLazyCounter, 115 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 170 SdHoareTripleChecker+Invalid, 148 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 115 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-09 23:04:37,544 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [81 Valid, 170 Invalid, 148 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 115 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-09 23:04:37,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2022-01-09 23:04:37,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 181. [2022-01-09 23:04:37,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 181 states, 176 states have (on average 1.0965909090909092) internal successors, (193), 176 states have internal predecessors, (193), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-09 23:04:37,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 199 transitions. [2022-01-09 23:04:37,566 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 199 transitions. Word has length 218 [2022-01-09 23:04:37,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-09 23:04:37,566 INFO L470 AbstractCegarLoop]: Abstraction has 181 states and 199 transitions. [2022-01-09 23:04:37,567 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 57 states have (on average 2.3684210526315788) internal successors, (135), 57 states have internal predecessors, (135), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2022-01-09 23:04:37,567 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 199 transitions. [2022-01-09 23:04:37,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 275 [2022-01-09 23:04:37,569 INFO L506 BasicCegarLoop]: Found error trace [2022-01-09 23:04:37,569 INFO L514 BasicCegarLoop]: trace histogram [54, 54, 42, 42, 42, 6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-09 23:04:37,598 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-01-09 23:04:37,770 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-01-09 23:04:37,770 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-09 23:04:37,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-09 23:04:37,771 INFO L85 PathProgramCache]: Analyzing trace with hash 1032547419, now seen corresponding path program 8 times [2022-01-09 23:04:37,771 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-09 23:04:37,771 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1842085691] [2022-01-09 23:04:37,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 23:04:37,771 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-09 23:04:37,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 23:04:39,139 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2022-01-09 23:04:39,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 23:04:39,161 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 160 [2022-01-09 23:04:39,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 23:04:39,179 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 223 [2022-01-09 23:04:39,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 23:04:39,199 INFO L134 CoverageAnalysis]: Checked inductivity of 5676 backedges. 0 proven. 2916 refuted. 0 times theorem prover too weak. 2760 trivial. 0 not checked. [2022-01-09 23:04:39,199 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-09 23:04:39,200 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1842085691] [2022-01-09 23:04:39,200 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1842085691] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-09 23:04:39,200 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1776579598] [2022-01-09 23:04:39,200 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-09 23:04:39,200 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-09 23:04:39,200 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-09 23:04:39,201 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-09 23:04:39,228 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-01-09 23:04:39,437 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-09 23:04:39,437 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-09 23:04:39,444 INFO L263 TraceCheckSpWp]: Trace formula consists of 1033 conjuncts, 56 conjunts are in the unsatisfiable core [2022-01-09 23:04:39,449 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-09 23:04:39,832 INFO L134 CoverageAnalysis]: Checked inductivity of 5676 backedges. 0 proven. 2916 refuted. 0 times theorem prover too weak. 2760 trivial. 0 not checked. [2022-01-09 23:04:39,833 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-09 23:04:40,467 INFO L134 CoverageAnalysis]: Checked inductivity of 5676 backedges. 0 proven. 2916 refuted. 0 times theorem prover too weak. 2760 trivial. 0 not checked. [2022-01-09 23:04:40,467 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1776579598] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-09 23:04:40,467 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-09 23:04:40,467 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [57, 57, 57] total 63 [2022-01-09 23:04:40,468 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1476529568] [2022-01-09 23:04:40,468 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-09 23:04:40,468 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2022-01-09 23:04:40,468 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-09 23:04:40,469 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2022-01-09 23:04:40,470 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1953, Invalid=1953, Unknown=0, NotChecked=0, Total=3906 [2022-01-09 23:04:40,471 INFO L87 Difference]: Start difference. First operand 181 states and 199 transitions. Second operand has 63 states, 63 states have (on average 2.365079365079365) internal successors, (149), 63 states have internal predecessors, (149), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2022-01-09 23:04:40,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-09 23:04:40,610 INFO L93 Difference]: Finished difference Result 263 states and 304 transitions. [2022-01-09 23:04:40,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2022-01-09 23:04:40,611 INFO L78 Accepts]: Start accepts. Automaton has has 63 states, 63 states have (on average 2.365079365079365) internal successors, (149), 63 states have internal predecessors, (149), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 274 [2022-01-09 23:04:40,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-09 23:04:40,612 INFO L225 Difference]: With dead ends: 263 [2022-01-09 23:04:40,612 INFO L226 Difference]: Without dead ends: 193 [2022-01-09 23:04:40,613 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 609 GetRequests, 547 SyntacticMatches, 1 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1953, Invalid=1953, Unknown=0, NotChecked=0, Total=3906 [2022-01-09 23:04:40,614 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 60 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 124 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 98 SdHoareTripleChecker+Invalid, 129 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 124 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-09 23:04:40,615 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [60 Valid, 98 Invalid, 129 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 124 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-09 23:04:40,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2022-01-09 23:04:40,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 193. [2022-01-09 23:04:40,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 193 states, 188 states have (on average 1.0904255319148937) internal successors, (205), 188 states have internal predecessors, (205), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-09 23:04:40,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 211 transitions. [2022-01-09 23:04:40,624 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 211 transitions. Word has length 274 [2022-01-09 23:04:40,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-09 23:04:40,627 INFO L470 AbstractCegarLoop]: Abstraction has 193 states and 211 transitions. [2022-01-09 23:04:40,627 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 63 states, 63 states have (on average 2.365079365079365) internal successors, (149), 63 states have internal predecessors, (149), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2022-01-09 23:04:40,627 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 211 transitions. [2022-01-09 23:04:40,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 287 [2022-01-09 23:04:40,630 INFO L506 BasicCegarLoop]: Found error trace [2022-01-09 23:04:40,630 INFO L514 BasicCegarLoop]: trace histogram [60, 60, 42, 42, 42, 6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-09 23:04:40,655 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-01-09 23:04:40,843 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-01-09 23:04:40,843 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-09 23:04:40,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-09 23:04:40,844 INFO L85 PathProgramCache]: Analyzing trace with hash -33288217, now seen corresponding path program 9 times [2022-01-09 23:04:40,844 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-09 23:04:40,844 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [267901987] [2022-01-09 23:04:40,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 23:04:40,844 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-09 23:04:40,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 23:04:40,983 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 123 [2022-01-09 23:04:41,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 23:04:41,135 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 172 [2022-01-09 23:04:41,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 23:04:41,150 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 235 [2022-01-09 23:04:41,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 23:04:41,167 INFO L134 CoverageAnalysis]: Checked inductivity of 6360 backedges. 0 proven. 1527 refuted. 0 times theorem prover too weak. 4833 trivial. 0 not checked. [2022-01-09 23:04:41,167 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-09 23:04:41,167 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [267901987] [2022-01-09 23:04:41,168 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [267901987] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-09 23:04:41,168 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1292430816] [2022-01-09 23:04:41,168 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-09 23:04:41,168 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-09 23:04:41,168 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-09 23:04:41,172 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-09 23:04:41,200 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-01-09 23:04:41,445 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2022-01-09 23:04:41,445 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-09 23:04:41,448 INFO L263 TraceCheckSpWp]: Trace formula consists of 317 conjuncts, 8 conjunts are in the unsatisfiable core [2022-01-09 23:04:41,452 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-09 23:04:41,828 INFO L134 CoverageAnalysis]: Checked inductivity of 6360 backedges. 1242 proven. 36 refuted. 0 times theorem prover too weak. 5082 trivial. 0 not checked. [2022-01-09 23:04:41,828 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-09 23:04:42,187 INFO L134 CoverageAnalysis]: Checked inductivity of 6360 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 6324 trivial. 0 not checked. [2022-01-09 23:04:42,188 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1292430816] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-09 23:04:42,188 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-09 23:04:42,188 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 9, 9] total 31 [2022-01-09 23:04:42,188 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1768219516] [2022-01-09 23:04:42,188 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-09 23:04:42,189 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-01-09 23:04:42,189 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-09 23:04:42,189 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-01-09 23:04:42,190 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=675, Unknown=0, NotChecked=0, Total=930 [2022-01-09 23:04:42,190 INFO L87 Difference]: Start difference. First operand 193 states and 211 transitions. Second operand has 31 states, 31 states have (on average 3.2580645161290325) internal successors, (101), 31 states have internal predecessors, (101), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-01-09 23:04:42,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-09 23:04:42,265 INFO L93 Difference]: Finished difference Result 283 states and 331 transitions. [2022-01-09 23:04:42,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-01-09 23:04:42,266 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 3.2580645161290325) internal successors, (101), 31 states have internal predecessors, (101), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 286 [2022-01-09 23:04:42,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-09 23:04:42,267 INFO L225 Difference]: With dead ends: 283 [2022-01-09 23:04:42,267 INFO L226 Difference]: Without dead ends: 214 [2022-01-09 23:04:42,268 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 593 GetRequests, 564 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 196 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=255, Invalid=675, Unknown=0, NotChecked=0, Total=930 [2022-01-09 23:04:42,268 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 99 mSDsluCounter, 113 mSDsCounter, 0 mSdLazyCounter, 76 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 137 SdHoareTripleChecker+Invalid, 92 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 76 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-09 23:04:42,268 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [99 Valid, 137 Invalid, 92 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 76 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-09 23:04:42,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2022-01-09 23:04:42,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 212. [2022-01-09 23:04:42,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 212 states, 207 states have (on average 1.0869565217391304) internal successors, (225), 207 states have internal predecessors, (225), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-09 23:04:42,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 231 transitions. [2022-01-09 23:04:42,276 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 231 transitions. Word has length 286 [2022-01-09 23:04:42,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-09 23:04:42,277 INFO L470 AbstractCegarLoop]: Abstraction has 212 states and 231 transitions. [2022-01-09 23:04:42,277 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 3.2580645161290325) internal successors, (101), 31 states have internal predecessors, (101), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-01-09 23:04:42,277 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 231 transitions. [2022-01-09 23:04:42,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 312 [2022-01-09 23:04:42,280 INFO L506 BasicCegarLoop]: Found error trace [2022-01-09 23:04:42,280 INFO L514 BasicCegarLoop]: trace histogram [60, 60, 45, 45, 45, 14, 14, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-09 23:04:42,311 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-01-09 23:04:42,499 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-01-09 23:04:42,499 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-09 23:04:42,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-09 23:04:42,500 INFO L85 PathProgramCache]: Analyzing trace with hash -512401555, now seen corresponding path program 10 times [2022-01-09 23:04:42,500 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-09 23:04:42,500 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1000839905] [2022-01-09 23:04:42,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 23:04:42,500 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-09 23:04:42,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 23:04:42,697 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 123 [2022-01-09 23:04:42,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 23:04:42,832 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 175 [2022-01-09 23:04:42,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 23:04:42,850 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 257 [2022-01-09 23:04:42,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 23:04:42,872 INFO L134 CoverageAnalysis]: Checked inductivity of 6916 backedges. 0 proven. 1748 refuted. 0 times theorem prover too weak. 5168 trivial. 0 not checked. [2022-01-09 23:04:42,872 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-09 23:04:42,873 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1000839905] [2022-01-09 23:04:42,873 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1000839905] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-09 23:04:42,873 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1800111176] [2022-01-09 23:04:42,873 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-09 23:04:42,873 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-09 23:04:42,873 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-09 23:04:42,874 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-09 23:04:42,907 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-01-09 23:04:43,191 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-09 23:04:43,192 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-09 23:04:43,199 INFO L263 TraceCheckSpWp]: Trace formula consists of 1170 conjuncts, 17 conjunts are in the unsatisfiable core [2022-01-09 23:04:43,203 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-09 23:04:43,619 INFO L134 CoverageAnalysis]: Checked inductivity of 6916 backedges. 1418 proven. 330 refuted. 0 times theorem prover too weak. 5168 trivial. 0 not checked. [2022-01-09 23:04:43,619 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-09 23:04:44,166 INFO L134 CoverageAnalysis]: Checked inductivity of 6916 backedges. 1418 proven. 330 refuted. 0 times theorem prover too weak. 5168 trivial. 0 not checked. [2022-01-09 23:04:44,166 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1800111176] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-09 23:04:44,166 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-09 23:04:44,166 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 34 [2022-01-09 23:04:44,166 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [950364836] [2022-01-09 23:04:44,167 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-09 23:04:44,167 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-01-09 23:04:44,167 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-09 23:04:44,168 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-01-09 23:04:44,168 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2022-01-09 23:04:44,168 INFO L87 Difference]: Start difference. First operand 212 states and 231 transitions. Second operand has 34 states, 34 states have (on average 3.6176470588235294) internal successors, (123), 34 states have internal predecessors, (123), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-01-09 23:04:44,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-09 23:04:44,267 INFO L93 Difference]: Finished difference Result 351 states and 424 transitions. [2022-01-09 23:04:44,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-01-09 23:04:44,268 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 3.6176470588235294) internal successors, (123), 34 states have internal predecessors, (123), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 311 [2022-01-09 23:04:44,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-09 23:04:44,271 INFO L225 Difference]: With dead ends: 351 [2022-01-09 23:04:44,271 INFO L226 Difference]: Without dead ends: 263 [2022-01-09 23:04:44,272 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 644 GetRequests, 612 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2022-01-09 23:04:44,275 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 189 mSDsluCounter, 128 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 189 SdHoareTripleChecker+Valid, 154 SdHoareTripleChecker+Invalid, 90 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-09 23:04:44,276 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [189 Valid, 154 Invalid, 90 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 68 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-09 23:04:44,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 263 states. [2022-01-09 23:04:44,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 263 to 263. [2022-01-09 23:04:44,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 263 states, 258 states have (on average 1.1356589147286822) internal successors, (293), 258 states have internal predecessors, (293), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-09 23:04:44,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 263 states to 263 states and 299 transitions. [2022-01-09 23:04:44,284 INFO L78 Accepts]: Start accepts. Automaton has 263 states and 299 transitions. Word has length 311 [2022-01-09 23:04:44,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-09 23:04:44,285 INFO L470 AbstractCegarLoop]: Abstraction has 263 states and 299 transitions. [2022-01-09 23:04:44,285 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 3.6176470588235294) internal successors, (123), 34 states have internal predecessors, (123), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-01-09 23:04:44,285 INFO L276 IsEmpty]: Start isEmpty. Operand 263 states and 299 transitions. [2022-01-09 23:04:44,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 465 [2022-01-09 23:04:44,293 INFO L506 BasicCegarLoop]: Found error trace [2022-01-09 23:04:44,293 INFO L514 BasicCegarLoop]: trace histogram [96, 96, 96, 60, 60, 14, 14, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-09 23:04:44,322 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-01-09 23:04:44,507 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-01-09 23:04:44,508 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-09 23:04:44,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-09 23:04:44,508 INFO L85 PathProgramCache]: Analyzing trace with hash -1295900265, now seen corresponding path program 11 times [2022-01-09 23:04:44,508 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-09 23:04:44,508 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [152251039] [2022-01-09 23:04:44,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 23:04:44,508 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-09 23:04:44,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 23:04:44,759 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 123 [2022-01-09 23:04:44,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 23:04:45,288 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 226 [2022-01-09 23:04:45,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 23:04:45,320 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 359 [2022-01-09 23:04:45,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 23:04:45,357 INFO L134 CoverageAnalysis]: Checked inductivity of 17779 backedges. 0 proven. 7800 refuted. 0 times theorem prover too weak. 9979 trivial. 0 not checked. [2022-01-09 23:04:45,358 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-09 23:04:45,358 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [152251039] [2022-01-09 23:04:45,358 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [152251039] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-09 23:04:45,358 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [553384630] [2022-01-09 23:04:45,358 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-09 23:04:45,358 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-09 23:04:45,358 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-09 23:04:45,360 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-09 23:04:45,383 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process