/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/loops-crafted-1/mono-crafted_13.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-a10ec3b [2022-01-09 22:27:13,111 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-09 22:27:13,112 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-09 22:27:13,166 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-01-09 22:27:13,192 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-01-09 22:27:13,192 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-01-09 22:27:13,193 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-01-09 22:27:13,199 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 22:27:13,228 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-09 22:27:13,228 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-09 22:27:13,229 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-01-09 22:27:13,229 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-01-09 22:27:13,229 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-01-09 22:27:13,229 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-01-09 22:27:13,230 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-01-09 22:27:13,230 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-01-09 22:27:13,230 INFO L138 SettingsManager]: * Use SBE=true [2022-01-09 22:27:13,230 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-09 22:27:13,230 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-09 22:27:13,230 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-09 22:27:13,231 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-09 22:27:13,231 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-09 22:27:13,231 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-09 22:27:13,231 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-01-09 22:27:13,231 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-09 22:27:13,231 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-09 22:27:13,231 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-09 22:27:13,231 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-09 22:27:13,232 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-09 22:27:13,232 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-09 22:27:13,232 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-09 22:27:13,232 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-01-09 22:27:13,232 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-01-09 22:27:13,232 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-01-09 22:27:13,232 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-01-09 22:27:13,232 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-01-09 22:27:13,233 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-01-09 22:27:13,233 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-01-09 22:27:13,233 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-01-09 22:27:13,401 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-09 22:27:13,416 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-09 22:27:13,417 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-09 22:27:13,418 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-09 22:27:13,419 INFO L275 PluginConnector]: CDTParser initialized [2022-01-09 22:27:13,419 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops-crafted-1/mono-crafted_13.c [2022-01-09 22:27:13,464 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9d8a00944/dc30787d5e4b4fa1a863cb79a68b97ed/FLAG33d581402 [2022-01-09 22:27:13,773 INFO L306 CDTParser]: Found 1 translation units. [2022-01-09 22:27:13,774 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops-crafted-1/mono-crafted_13.c [2022-01-09 22:27:13,777 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9d8a00944/dc30787d5e4b4fa1a863cb79a68b97ed/FLAG33d581402 [2022-01-09 22:27:14,204 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9d8a00944/dc30787d5e4b4fa1a863cb79a68b97ed [2022-01-09 22:27:14,208 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-09 22:27:14,210 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-01-09 22:27:14,221 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-09 22:27:14,221 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-09 22:27:14,224 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-09 22:27:14,224 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.01 10:27:14" (1/1) ... [2022-01-09 22:27:14,225 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@510d61e1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 10:27:14, skipping insertion in model container [2022-01-09 22:27:14,226 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.01 10:27:14" (1/1) ... [2022-01-09 22:27:14,233 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-09 22:27:14,254 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-09 22:27:14,355 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loops-crafted-1/mono-crafted_13.c[319,332] [2022-01-09 22:27:14,378 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-09 22:27:14,382 INFO L203 MainTranslator]: Completed pre-run [2022-01-09 22:27:14,389 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loops-crafted-1/mono-crafted_13.c[319,332] [2022-01-09 22:27:14,394 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-09 22:27:14,401 INFO L208 MainTranslator]: Completed translation [2022-01-09 22:27:14,402 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 10:27:14 WrapperNode [2022-01-09 22:27:14,402 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-09 22:27:14,403 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-01-09 22:27:14,403 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-01-09 22:27:14,403 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-01-09 22:27:14,407 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 10:27:14" (1/1) ... [2022-01-09 22:27:14,410 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 10:27:14" (1/1) ... [2022-01-09 22:27:14,419 INFO L137 Inliner]: procedures = 12, calls = 8, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 42 [2022-01-09 22:27:14,420 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-01-09 22:27:14,420 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-09 22:27:14,420 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-09 22:27:14,420 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-09 22:27:14,425 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 10:27:14" (1/1) ... [2022-01-09 22:27:14,425 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 10:27:14" (1/1) ... [2022-01-09 22:27:14,426 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 10:27:14" (1/1) ... [2022-01-09 22:27:14,426 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 10:27:14" (1/1) ... [2022-01-09 22:27:14,434 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 10:27:14" (1/1) ... [2022-01-09 22:27:14,436 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 10:27:14" (1/1) ... [2022-01-09 22:27:14,437 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 10:27:14" (1/1) ... [2022-01-09 22:27:14,441 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-09 22:27:14,442 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-09 22:27:14,442 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-09 22:27:14,442 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-09 22:27:14,442 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 10:27:14" (1/1) ... [2022-01-09 22:27:14,447 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-09 22:27:14,455 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-09 22:27:14,509 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 22:27:14,525 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 22:27:14,537 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-09 22:27:14,537 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-09 22:27:14,537 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-09 22:27:14,537 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-01-09 22:27:14,573 INFO L234 CfgBuilder]: Building ICFG [2022-01-09 22:27:14,574 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-09 22:27:14,641 INFO L275 CfgBuilder]: Performing block encoding [2022-01-09 22:27:14,645 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-09 22:27:14,645 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-01-09 22:27:14,646 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.01 10:27:14 BoogieIcfgContainer [2022-01-09 22:27:14,646 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-09 22:27:14,647 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-09 22:27:14,647 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-09 22:27:14,649 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-09 22:27:14,649 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.01 10:27:14" (1/3) ... [2022-01-09 22:27:14,650 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@66160405 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.01 10:27:14, skipping insertion in model container [2022-01-09 22:27:14,650 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 10:27:14" (2/3) ... [2022-01-09 22:27:14,650 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@66160405 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.01 10:27:14, skipping insertion in model container [2022-01-09 22:27:14,650 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.01 10:27:14" (3/3) ... [2022-01-09 22:27:14,651 INFO L111 eAbstractionObserver]: Analyzing ICFG mono-crafted_13.c [2022-01-09 22:27:14,654 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-01-09 22:27:14,654 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-09 22:27:14,689 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-09 22:27:14,695 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 22:27:14,695 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-01-09 22:27:14,719 INFO L276 IsEmpty]: Start isEmpty. Operand has 13 states, 11 states have (on average 1.6363636363636365) internal successors, (18), 12 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 22:27:14,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-01-09 22:27:14,732 INFO L506 BasicCegarLoop]: Found error trace [2022-01-09 22:27:14,732 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-01-09 22:27:14,741 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-09 22:27:14,747 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-09 22:27:14,747 INFO L85 PathProgramCache]: Analyzing trace with hash 1818421976, now seen corresponding path program 1 times [2022-01-09 22:27:14,754 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-09 22:27:14,755 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1627869504] [2022-01-09 22:27:14,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 22:27:14,756 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-09 22:27:14,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 22:27:14,868 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-09 22:27:14,868 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-09 22:27:14,869 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1627869504] [2022-01-09 22:27:14,870 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1627869504] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-09 22:27:14,870 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-09 22:27:14,870 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-01-09 22:27:14,871 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [548339110] [2022-01-09 22:27:14,876 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-09 22:27:14,879 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-01-09 22:27:14,894 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-09 22:27:14,924 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-01-09 22:27:14,925 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-01-09 22:27:14,927 INFO L87 Difference]: Start difference. First operand has 13 states, 11 states have (on average 1.6363636363636365) internal successors, (18), 12 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 22:27:14,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-09 22:27:14,941 INFO L93 Difference]: Finished difference Result 22 states and 29 transitions. [2022-01-09 22:27:14,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-01-09 22:27:14,942 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-01-09 22:27:14,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-09 22:27:14,960 INFO L225 Difference]: With dead ends: 22 [2022-01-09 22:27:14,960 INFO L226 Difference]: Without dead ends: 9 [2022-01-09 22:27:14,976 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-01-09 22:27:14,980 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-09 22:27:14,981 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-09 22:27:14,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2022-01-09 22:27:15,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2022-01-09 22:27:15,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9 states, 8 states have (on average 1.375) internal successors, (11), 8 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 22:27:15,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 11 transitions. [2022-01-09 22:27:15,024 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 11 transitions. Word has length 7 [2022-01-09 22:27:15,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-09 22:27:15,025 INFO L470 AbstractCegarLoop]: Abstraction has 9 states and 11 transitions. [2022-01-09 22:27:15,025 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 22:27:15,025 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 11 transitions. [2022-01-09 22:27:15,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-01-09 22:27:15,025 INFO L506 BasicCegarLoop]: Found error trace [2022-01-09 22:27:15,026 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-01-09 22:27:15,026 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-01-09 22:27:15,026 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-09 22:27:15,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-09 22:27:15,028 INFO L85 PathProgramCache]: Analyzing trace with hash 1809186766, now seen corresponding path program 1 times [2022-01-09 22:27:15,029 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-09 22:27:15,029 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [140513098] [2022-01-09 22:27:15,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 22:27:15,029 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-09 22:27:15,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 22:27:15,130 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-09 22:27:15,131 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-09 22:27:15,131 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [140513098] [2022-01-09 22:27:15,131 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [140513098] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-09 22:27:15,131 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-09 22:27:15,131 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-09 22:27:15,131 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [778748761] [2022-01-09 22:27:15,131 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-09 22:27:15,132 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-09 22:27:15,132 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-09 22:27:15,133 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-09 22:27:15,133 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-09 22:27:15,133 INFO L87 Difference]: Start difference. First operand 9 states and 11 transitions. Second operand has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 22:27:15,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-09 22:27:15,160 INFO L93 Difference]: Finished difference Result 18 states and 24 transitions. [2022-01-09 22:27:15,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-09 22:27:15,160 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-01-09 22:27:15,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-09 22:27:15,161 INFO L225 Difference]: With dead ends: 18 [2022-01-09 22:27:15,161 INFO L226 Difference]: Without dead ends: 11 [2022-01-09 22:27:15,161 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-09 22:27:15,162 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 1 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 13 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-09 22:27:15,162 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 13 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-09 22:27:15,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2022-01-09 22:27:15,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2022-01-09 22:27:15,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11 states, 10 states have (on average 1.3) internal successors, (13), 10 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 22:27:15,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 13 transitions. [2022-01-09 22:27:15,165 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 13 transitions. Word has length 7 [2022-01-09 22:27:15,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-09 22:27:15,165 INFO L470 AbstractCegarLoop]: Abstraction has 11 states and 13 transitions. [2022-01-09 22:27:15,165 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 22:27:15,165 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 13 transitions. [2022-01-09 22:27:15,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-01-09 22:27:15,165 INFO L506 BasicCegarLoop]: Found error trace [2022-01-09 22:27:15,166 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-09 22:27:15,166 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-01-09 22:27:15,166 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-09 22:27:15,166 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-09 22:27:15,166 INFO L85 PathProgramCache]: Analyzing trace with hash 576672011, now seen corresponding path program 1 times [2022-01-09 22:27:15,166 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-09 22:27:15,167 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [112143837] [2022-01-09 22:27:15,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 22:27:15,167 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-09 22:27:15,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 22:27:15,239 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-09 22:27:15,239 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-09 22:27:15,239 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [112143837] [2022-01-09 22:27:15,239 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [112143837] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-09 22:27:15,239 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [732687697] [2022-01-09 22:27:15,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 22:27:15,240 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-09 22:27:15,240 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-09 22:27:15,256 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 22:27:15,257 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 22:27:15,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 22:27:15,289 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 3 conjunts are in the unsatisfiable core [2022-01-09 22:27:15,292 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-09 22:27:15,329 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-09 22:27:15,329 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-09 22:27:15,358 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-09 22:27:15,359 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [732687697] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-09 22:27:15,359 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-09 22:27:15,359 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2022-01-09 22:27:15,359 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1752946045] [2022-01-09 22:27:15,359 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-09 22:27:15,359 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-01-09 22:27:15,360 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-09 22:27:15,360 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-01-09 22:27:15,360 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2022-01-09 22:27:15,360 INFO L87 Difference]: Start difference. First operand 11 states and 13 transitions. Second operand has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 22:27:15,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-09 22:27:15,382 INFO L93 Difference]: Finished difference Result 22 states and 30 transitions. [2022-01-09 22:27:15,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-09 22:27:15,383 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-01-09 22:27:15,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-09 22:27:15,383 INFO L225 Difference]: With dead ends: 22 [2022-01-09 22:27:15,383 INFO L226 Difference]: Without dead ends: 15 [2022-01-09 22:27:15,384 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2022-01-09 22:27:15,384 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 5 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-09 22:27:15,385 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5 Valid, 16 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-09 22:27:15,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2022-01-09 22:27:15,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 14. [2022-01-09 22:27:15,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 13 states have (on average 1.2307692307692308) internal successors, (16), 13 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 22:27:15,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 16 transitions. [2022-01-09 22:27:15,387 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 16 transitions. Word has length 9 [2022-01-09 22:27:15,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-09 22:27:15,387 INFO L470 AbstractCegarLoop]: Abstraction has 14 states and 16 transitions. [2022-01-09 22:27:15,388 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 22:27:15,388 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 16 transitions. [2022-01-09 22:27:15,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-01-09 22:27:15,388 INFO L506 BasicCegarLoop]: Found error trace [2022-01-09 22:27:15,388 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-09 22:27:15,419 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 22:27:15,605 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-09 22:27:15,605 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-09 22:27:15,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-09 22:27:15,606 INFO L85 PathProgramCache]: Analyzing trace with hash 571958019, now seen corresponding path program 1 times [2022-01-09 22:27:15,606 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-09 22:27:15,607 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1709585687] [2022-01-09 22:27:15,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 22:27:15,607 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-09 22:27:15,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 22:27:15,645 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-09 22:27:15,645 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-09 22:27:15,646 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1709585687] [2022-01-09 22:27:15,646 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1709585687] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-09 22:27:15,646 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [824920232] [2022-01-09 22:27:15,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 22:27:15,646 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-09 22:27:15,646 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-09 22:27:15,650 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 22:27:15,653 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 22:27:15,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 22:27:15,719 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-09 22:27:15,720 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-09 22:27:15,764 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-09 22:27:15,765 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-09 22:27:15,828 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-09 22:27:15,829 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [824920232] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-09 22:27:15,829 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-09 22:27:15,829 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 9 [2022-01-09 22:27:15,829 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1930819582] [2022-01-09 22:27:15,829 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-09 22:27:15,829 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-01-09 22:27:15,829 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-09 22:27:15,830 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-01-09 22:27:15,830 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2022-01-09 22:27:15,830 INFO L87 Difference]: Start difference. First operand 14 states and 16 transitions. Second operand has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 9 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 22:27:15,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-09 22:27:15,866 INFO L93 Difference]: Finished difference Result 30 states and 38 transitions. [2022-01-09 22:27:15,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-01-09 22:27:15,867 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 9 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-01-09 22:27:15,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-09 22:27:15,868 INFO L225 Difference]: With dead ends: 30 [2022-01-09 22:27:15,868 INFO L226 Difference]: Without dead ends: 22 [2022-01-09 22:27:15,868 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2022-01-09 22:27:15,869 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 0 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-09 22:27:15,869 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 21 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-09 22:27:15,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2022-01-09 22:27:15,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2022-01-09 22:27:15,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 21 states have (on average 1.1428571428571428) internal successors, (24), 21 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 22:27:15,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 24 transitions. [2022-01-09 22:27:15,872 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 24 transitions. Word has length 13 [2022-01-09 22:27:15,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-09 22:27:15,873 INFO L470 AbstractCegarLoop]: Abstraction has 22 states and 24 transitions. [2022-01-09 22:27:15,873 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 9 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 22:27:15,873 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 24 transitions. [2022-01-09 22:27:15,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-09 22:27:15,873 INFO L506 BasicCegarLoop]: Found error trace [2022-01-09 22:27:15,873 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-09 22:27:15,908 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-01-09 22:27:16,074 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2022-01-09 22:27:16,074 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-09 22:27:16,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-09 22:27:16,075 INFO L85 PathProgramCache]: Analyzing trace with hash -870720137, now seen corresponding path program 2 times [2022-01-09 22:27:16,076 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-09 22:27:16,076 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1768646781] [2022-01-09 22:27:16,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 22:27:16,076 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-09 22:27:16,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 22:27:16,136 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 7 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-09 22:27:16,136 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-09 22:27:16,137 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1768646781] [2022-01-09 22:27:16,137 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1768646781] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-09 22:27:16,137 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [130827874] [2022-01-09 22:27:16,137 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-09 22:27:16,137 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-09 22:27:16,137 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-09 22:27:16,142 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 22:27:16,142 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 22:27:16,192 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-09 22:27:16,192 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-09 22:27:16,193 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 8 conjunts are in the unsatisfiable core [2022-01-09 22:27:16,195 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-09 22:27:16,304 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 7 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-09 22:27:16,304 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-09 22:27:16,409 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 7 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-09 22:27:16,410 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [130827874] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-09 22:27:16,410 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-09 22:27:16,410 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 17 [2022-01-09 22:27:16,410 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [475346945] [2022-01-09 22:27:16,410 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-09 22:27:16,410 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-01-09 22:27:16,410 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-09 22:27:16,411 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-01-09 22:27:16,411 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2022-01-09 22:27:16,411 INFO L87 Difference]: Start difference. First operand 22 states and 24 transitions. Second operand has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 22:27:16,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-09 22:27:16,445 INFO L93 Difference]: Finished difference Result 46 states and 58 transitions. [2022-01-09 22:27:16,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-01-09 22:27:16,445 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-01-09 22:27:16,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-09 22:27:16,446 INFO L225 Difference]: With dead ends: 46 [2022-01-09 22:27:16,446 INFO L226 Difference]: Without dead ends: 38 [2022-01-09 22:27:16,446 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2022-01-09 22:27:16,447 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 0 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 17 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 22:27:16,447 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 17 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-09 22:27:16,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2022-01-09 22:27:16,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2022-01-09 22:27:16,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 37 states have (on average 1.0810810810810811) internal successors, (40), 37 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 22:27:16,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 40 transitions. [2022-01-09 22:27:16,451 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 40 transitions. Word has length 21 [2022-01-09 22:27:16,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-09 22:27:16,451 INFO L470 AbstractCegarLoop]: Abstraction has 38 states and 40 transitions. [2022-01-09 22:27:16,452 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 22:27:16,452 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 40 transitions. [2022-01-09 22:27:16,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-01-09 22:27:16,452 INFO L506 BasicCegarLoop]: Found error trace [2022-01-09 22:27:16,452 INFO L514 BasicCegarLoop]: trace histogram [15, 14, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-09 22:27:16,469 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-01-09 22:27:16,672 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-09 22:27:16,672 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-09 22:27:16,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-09 22:27:16,672 INFO L85 PathProgramCache]: Analyzing trace with hash 114013791, now seen corresponding path program 3 times [2022-01-09 22:27:16,673 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-09 22:27:16,673 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [255223925] [2022-01-09 22:27:16,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 22:27:16,673 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-09 22:27:16,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 22:27:16,817 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 15 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-09 22:27:16,817 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-09 22:27:16,817 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [255223925] [2022-01-09 22:27:16,817 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [255223925] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-09 22:27:16,817 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2758286] [2022-01-09 22:27:16,817 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-09 22:27:16,818 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-09 22:27:16,818 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-09 22:27:16,819 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 22:27:16,840 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 22:27:16,848 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-01-09 22:27:16,848 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-09 22:27:16,848 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-09 22:27:16,850 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-09 22:27:16,993 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2022-01-09 22:27:16,993 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-09 22:27:16,994 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2758286] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-09 22:27:16,994 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-01-09 22:27:16,994 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [17] total 19 [2022-01-09 22:27:16,994 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1959484375] [2022-01-09 22:27:16,994 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-09 22:27:16,994 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-09 22:27:16,994 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-09 22:27:16,995 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-09 22:27:16,995 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=201, Unknown=0, NotChecked=0, Total=342 [2022-01-09 22:27:16,995 INFO L87 Difference]: Start difference. First operand 38 states and 40 transitions. Second operand has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 22:27:17,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-09 22:27:17,004 INFO L93 Difference]: Finished difference Result 46 states and 50 transitions. [2022-01-09 22:27:17,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-09 22:27:17,005 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2022-01-09 22:27:17,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-09 22:27:17,005 INFO L225 Difference]: With dead ends: 46 [2022-01-09 22:27:17,005 INFO L226 Difference]: Without dead ends: 42 [2022-01-09 22:27:17,006 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=141, Invalid=201, Unknown=0, NotChecked=0, Total=342 [2022-01-09 22:27:17,006 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 3 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-09 22:27:17,006 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 17 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-09 22:27:17,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2022-01-09 22:27:17,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 40. [2022-01-09 22:27:17,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 39 states have (on average 1.0769230769230769) internal successors, (42), 39 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 22:27:17,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 42 transitions. [2022-01-09 22:27:17,011 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 42 transitions. Word has length 37 [2022-01-09 22:27:17,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-09 22:27:17,011 INFO L470 AbstractCegarLoop]: Abstraction has 40 states and 42 transitions. [2022-01-09 22:27:17,011 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 22:27:17,011 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 42 transitions. [2022-01-09 22:27:17,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-01-09 22:27:17,012 INFO L506 BasicCegarLoop]: Found error trace [2022-01-09 22:27:17,012 INFO L514 BasicCegarLoop]: trace histogram [15, 14, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-09 22:27:17,028 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 22:27:17,228 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-09 22:27:17,228 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-09 22:27:17,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-09 22:27:17,229 INFO L85 PathProgramCache]: Analyzing trace with hash -2048604129, now seen corresponding path program 1 times [2022-01-09 22:27:17,229 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-09 22:27:17,229 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1199094358] [2022-01-09 22:27:17,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 22:27:17,229 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-09 22:27:17,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 22:27:17,354 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 15 proven. 210 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-09 22:27:17,355 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-09 22:27:17,355 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1199094358] [2022-01-09 22:27:17,355 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1199094358] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-09 22:27:17,355 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [165665557] [2022-01-09 22:27:17,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 22:27:17,355 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-09 22:27:17,355 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-09 22:27:17,372 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 22:27:17,373 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 22:27:17,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 22:27:17,402 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 16 conjunts are in the unsatisfiable core [2022-01-09 22:27:17,404 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-09 22:27:17,478 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 15 proven. 210 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-09 22:27:17,478 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-09 22:27:17,766 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 15 proven. 210 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-09 22:27:17,766 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [165665557] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-09 22:27:17,767 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-09 22:27:17,767 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 33 [2022-01-09 22:27:17,767 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [410067256] [2022-01-09 22:27:17,767 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-09 22:27:17,767 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-01-09 22:27:17,767 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-09 22:27:17,768 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-01-09 22:27:17,768 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2022-01-09 22:27:17,768 INFO L87 Difference]: Start difference. First operand 40 states and 42 transitions. Second operand has 33 states, 33 states have (on average 2.1818181818181817) internal successors, (72), 33 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 22:27:17,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-09 22:27:17,842 INFO L93 Difference]: Finished difference Result 82 states and 102 transitions. [2022-01-09 22:27:17,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-01-09 22:27:17,845 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.1818181818181817) internal successors, (72), 33 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2022-01-09 22:27:17,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-09 22:27:17,845 INFO L225 Difference]: With dead ends: 82 [2022-01-09 22:27:17,845 INFO L226 Difference]: Without dead ends: 72 [2022-01-09 22:27:17,846 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2022-01-09 22:27:17,846 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 0 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 91 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-09 22:27:17,846 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 21 Invalid, 91 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-09 22:27:17,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2022-01-09 22:27:17,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 72. [2022-01-09 22:27:17,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 71 states have (on average 1.0422535211267605) internal successors, (74), 71 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 22:27:17,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 74 transitions. [2022-01-09 22:27:17,853 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 74 transitions. Word has length 39 [2022-01-09 22:27:17,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-09 22:27:17,853 INFO L470 AbstractCegarLoop]: Abstraction has 72 states and 74 transitions. [2022-01-09 22:27:17,853 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.1818181818181817) internal successors, (72), 33 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 22:27:17,853 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 74 transitions. [2022-01-09 22:27:17,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-01-09 22:27:17,854 INFO L506 BasicCegarLoop]: Found error trace [2022-01-09 22:27:17,854 INFO L514 BasicCegarLoop]: trace histogram [31, 30, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-09 22:27:17,874 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 22:27:18,074 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-09 22:27:18,075 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-09 22:27:18,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-09 22:27:18,075 INFO L85 PathProgramCache]: Analyzing trace with hash 1608701423, now seen corresponding path program 2 times [2022-01-09 22:27:18,075 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-09 22:27:18,075 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [209926837] [2022-01-09 22:27:18,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 22:27:18,075 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-09 22:27:18,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 22:27:18,482 INFO L134 CoverageAnalysis]: Checked inductivity of 964 backedges. 31 proven. 930 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-09 22:27:18,483 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-09 22:27:18,483 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [209926837] [2022-01-09 22:27:18,483 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [209926837] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-09 22:27:18,483 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1908948176] [2022-01-09 22:27:18,483 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-09 22:27:18,483 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-09 22:27:18,483 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-09 22:27:18,500 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 22:27:18,501 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 22:27:18,546 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-09 22:27:18,547 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-09 22:27:18,547 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 32 conjunts are in the unsatisfiable core [2022-01-09 22:27:18,552 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-09 22:27:18,677 INFO L134 CoverageAnalysis]: Checked inductivity of 964 backedges. 31 proven. 930 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-09 22:27:18,677 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-09 22:27:19,593 INFO L134 CoverageAnalysis]: Checked inductivity of 964 backedges. 31 proven. 930 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-09 22:27:19,593 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1908948176] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-09 22:27:19,593 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-09 22:27:19,594 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33, 33] total 65 [2022-01-09 22:27:19,594 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1200639626] [2022-01-09 22:27:19,594 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-09 22:27:19,594 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 65 states [2022-01-09 22:27:19,594 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-09 22:27:19,595 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2022-01-09 22:27:19,597 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2080, Invalid=2080, Unknown=0, NotChecked=0, Total=4160 [2022-01-09 22:27:19,598 INFO L87 Difference]: Start difference. First operand 72 states and 74 transitions. Second operand has 65 states, 65 states have (on average 2.0923076923076924) internal successors, (136), 65 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 22:27:19,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-09 22:27:19,720 INFO L93 Difference]: Finished difference Result 146 states and 182 transitions. [2022-01-09 22:27:19,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2022-01-09 22:27:19,721 INFO L78 Accepts]: Start accepts. Automaton has has 65 states, 65 states have (on average 2.0923076923076924) internal successors, (136), 65 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 71 [2022-01-09 22:27:19,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-09 22:27:19,721 INFO L225 Difference]: With dead ends: 146 [2022-01-09 22:27:19,721 INFO L226 Difference]: Without dead ends: 136 [2022-01-09 22:27:19,723 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=2080, Invalid=2080, Unknown=0, NotChecked=0, Total=4160 [2022-01-09 22:27:19,723 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 0 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 154 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 188 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 154 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-09 22:27:19,723 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 37 Invalid, 188 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 154 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-09 22:27:19,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2022-01-09 22:27:19,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 136. [2022-01-09 22:27:19,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 135 states have (on average 1.0222222222222221) internal successors, (138), 135 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 22:27:19,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 138 transitions. [2022-01-09 22:27:19,778 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 138 transitions. Word has length 71 [2022-01-09 22:27:19,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-09 22:27:19,779 INFO L470 AbstractCegarLoop]: Abstraction has 136 states and 138 transitions. [2022-01-09 22:27:19,779 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 65 states, 65 states have (on average 2.0923076923076924) internal successors, (136), 65 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 22:27:19,779 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 138 transitions. [2022-01-09 22:27:19,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2022-01-09 22:27:19,783 INFO L506 BasicCegarLoop]: Found error trace [2022-01-09 22:27:19,783 INFO L514 BasicCegarLoop]: trace histogram [63, 62, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-09 22:27:19,802 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 22:27:19,998 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-09 22:27:19,999 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-09 22:27:19,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-09 22:27:19,999 INFO L85 PathProgramCache]: Analyzing trace with hash -1000525425, now seen corresponding path program 3 times [2022-01-09 22:27:19,999 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-09 22:27:19,999 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1264972982] [2022-01-09 22:27:19,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 22:27:19,999 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-09 22:27:20,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 22:27:20,958 INFO L134 CoverageAnalysis]: Checked inductivity of 3972 backedges. 63 proven. 3906 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-09 22:27:20,958 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-09 22:27:20,958 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1264972982] [2022-01-09 22:27:20,958 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1264972982] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-09 22:27:20,958 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1838930634] [2022-01-09 22:27:20,959 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-09 22:27:20,959 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-09 22:27:20,959 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-09 22:27:20,960 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 22:27:20,960 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 22:27:20,989 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-01-09 22:27:20,989 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-09 22:27:20,990 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 6 conjunts are in the unsatisfiable core [2022-01-09 22:27:20,992 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-09 22:27:21,387 INFO L134 CoverageAnalysis]: Checked inductivity of 3972 backedges. 63 proven. 3 refuted. 0 times theorem prover too weak. 3906 trivial. 0 not checked. [2022-01-09 22:27:21,388 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-09 22:27:21,672 INFO L134 CoverageAnalysis]: Checked inductivity of 3972 backedges. 63 proven. 3 refuted. 0 times theorem prover too weak. 3906 trivial. 0 not checked. [2022-01-09 22:27:21,672 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1838930634] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-09 22:27:21,672 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-09 22:27:21,672 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [65, 5, 5] total 71 [2022-01-09 22:27:21,672 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [819352350] [2022-01-09 22:27:21,672 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-09 22:27:21,673 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 71 states [2022-01-09 22:27:21,673 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-09 22:27:21,673 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2022-01-09 22:27:21,675 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2107, Invalid=2863, Unknown=0, NotChecked=0, Total=4970 [2022-01-09 22:27:21,675 INFO L87 Difference]: Start difference. First operand 136 states and 138 transitions. Second operand has 71 states, 71 states have (on average 2.112676056338028) internal successors, (150), 71 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 22:27:23,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-09 22:27:23,484 INFO L93 Difference]: Finished difference Result 154 states and 164 transitions. [2022-01-09 22:27:23,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2022-01-09 22:27:23,484 INFO L78 Accepts]: Start accepts. Automaton has has 71 states, 71 states have (on average 2.112676056338028) internal successors, (150), 71 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 135 [2022-01-09 22:27:23,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-09 22:27:23,485 INFO L225 Difference]: With dead ends: 154 [2022-01-09 22:27:23,485 INFO L226 Difference]: Without dead ends: 144 [2022-01-09 22:27:23,492 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 396 GetRequests, 264 SyntacticMatches, 0 SemanticMatches, 132 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2337 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=6454, Invalid=11368, Unknown=0, NotChecked=0, Total=17822 [2022-01-09 22:27:23,493 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 69 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 188 mSolverCounterSat, 73 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 261 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 73 IncrementalHoareTripleChecker+Valid, 188 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-09 22:27:23,493 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [69 Valid, 45 Invalid, 261 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [73 Valid, 188 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-09 22:27:23,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2022-01-09 22:27:23,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 142. [2022-01-09 22:27:23,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 141 states have (on average 1.0212765957446808) internal successors, (144), 141 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 22:27:23,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 144 transitions. [2022-01-09 22:27:23,513 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 144 transitions. Word has length 135 [2022-01-09 22:27:23,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-09 22:27:23,514 INFO L470 AbstractCegarLoop]: Abstraction has 142 states and 144 transitions. [2022-01-09 22:27:23,514 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 71 states, 71 states have (on average 2.112676056338028) internal successors, (150), 71 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 22:27:23,514 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 144 transitions. [2022-01-09 22:27:23,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2022-01-09 22:27:23,527 INFO L506 BasicCegarLoop]: Found error trace [2022-01-09 22:27:23,527 INFO L514 BasicCegarLoop]: trace histogram [64, 63, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-09 22:27:23,543 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-01-09 22:27:23,746 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-09 22:27:23,746 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-09 22:27:23,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-09 22:27:23,747 INFO L85 PathProgramCache]: Analyzing trace with hash -1372821556, now seen corresponding path program 4 times [2022-01-09 22:27:23,747 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-09 22:27:23,747 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [35326000] [2022-01-09 22:27:23,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 22:27:23,747 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-09 22:27:23,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 22:27:25,137 INFO L134 CoverageAnalysis]: Checked inductivity of 4117 backedges. 64 proven. 4032 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-01-09 22:27:25,137 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-09 22:27:25,137 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [35326000] [2022-01-09 22:27:25,137 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [35326000] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-09 22:27:25,138 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [49477280] [2022-01-09 22:27:25,138 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-09 22:27:25,138 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-09 22:27:25,138 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-09 22:27:25,139 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 22:27:25,140 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 22:27:25,220 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-09 22:27:25,221 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-09 22:27:25,222 INFO L263 TraceCheckSpWp]: Trace formula consists of 328 conjuncts, 65 conjunts are in the unsatisfiable core [2022-01-09 22:27:25,229 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-09 22:27:25,462 INFO L134 CoverageAnalysis]: Checked inductivity of 4117 backedges. 64 proven. 4032 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-01-09 22:27:25,462 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-09 22:27:28,955 INFO L134 CoverageAnalysis]: Checked inductivity of 4117 backedges. 64 proven. 4032 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-01-09 22:27:28,956 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [49477280] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-09 22:27:28,956 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-09 22:27:28,956 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [66, 66, 66] total 131 [2022-01-09 22:27:28,956 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1001133256] [2022-01-09 22:27:28,956 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-09 22:27:28,956 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 131 states [2022-01-09 22:27:28,956 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-09 22:27:28,958 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 131 interpolants. [2022-01-09 22:27:28,961 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8515, Invalid=8515, Unknown=0, NotChecked=0, Total=17030 [2022-01-09 22:27:28,961 INFO L87 Difference]: Start difference. First operand 142 states and 144 transitions. Second operand has 131 states, 131 states have (on average 2.045801526717557) internal successors, (268), 131 states have internal predecessors, (268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 22:27:29,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-09 22:27:29,225 INFO L93 Difference]: Finished difference Result 286 states and 355 transitions. [2022-01-09 22:27:29,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 130 states. [2022-01-09 22:27:29,225 INFO L78 Accepts]: Start accepts. Automaton has has 131 states, 131 states have (on average 2.045801526717557) internal successors, (268), 131 states have internal predecessors, (268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 141 [2022-01-09 22:27:29,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-09 22:27:29,227 INFO L225 Difference]: With dead ends: 286 [2022-01-09 22:27:29,227 INFO L226 Difference]: Without dead ends: 272 [2022-01-09 22:27:29,230 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 346 GetRequests, 217 SyntacticMatches, 0 SemanticMatches, 129 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 252 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=8515, Invalid=8515, Unknown=0, NotChecked=0, Total=17030 [2022-01-09 22:27:29,231 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 0 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 278 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 345 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 278 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-09 22:27:29,231 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 29 Invalid, 345 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 278 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-09 22:27:29,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 272 states. [2022-01-09 22:27:29,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 272 to 272. [2022-01-09 22:27:29,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 272 states, 271 states have (on average 1.011070110701107) internal successors, (274), 271 states have internal predecessors, (274), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 22:27:29,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 272 states to 272 states and 274 transitions. [2022-01-09 22:27:29,257 INFO L78 Accepts]: Start accepts. Automaton has 272 states and 274 transitions. Word has length 141 [2022-01-09 22:27:29,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-09 22:27:29,257 INFO L470 AbstractCegarLoop]: Abstraction has 272 states and 274 transitions. [2022-01-09 22:27:29,258 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 131 states, 131 states have (on average 2.045801526717557) internal successors, (268), 131 states have internal predecessors, (268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 22:27:29,258 INFO L276 IsEmpty]: Start isEmpty. Operand 272 states and 274 transitions. [2022-01-09 22:27:29,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 272 [2022-01-09 22:27:29,259 INFO L506 BasicCegarLoop]: Found error trace [2022-01-09 22:27:29,259 INFO L514 BasicCegarLoop]: trace histogram [129, 128, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-09 22:27:29,277 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-01-09 22:27:29,460 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,SelfDestructingSolverStorable9 [2022-01-09 22:27:29,460 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-09 22:27:29,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-09 22:27:29,461 INFO L85 PathProgramCache]: Analyzing trace with hash 2118041225, now seen corresponding path program 5 times [2022-01-09 22:27:29,461 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-09 22:27:29,461 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [348640705] [2022-01-09 22:27:29,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 22:27:29,461 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-09 22:27:29,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 22:27:33,738 INFO L134 CoverageAnalysis]: Checked inductivity of 16662 backedges. 129 proven. 16512 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-01-09 22:27:33,738 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-09 22:27:33,738 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [348640705] [2022-01-09 22:27:33,738 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [348640705] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-09 22:27:33,738 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1530236524] [2022-01-09 22:27:33,738 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-09 22:27:33,738 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-09 22:27:33,739 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-09 22:27:33,741 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 22:27:33,742 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 22:27:33,886 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 130 check-sat command(s) [2022-01-09 22:27:33,886 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-09 22:27:33,889 INFO L263 TraceCheckSpWp]: Trace formula consists of 588 conjuncts, 130 conjunts are in the unsatisfiable core [2022-01-09 22:27:33,893 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-09 22:27:34,290 INFO L134 CoverageAnalysis]: Checked inductivity of 16662 backedges. 129 proven. 16512 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-01-09 22:27:34,290 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-09 22:27:45,158 INFO L134 CoverageAnalysis]: Checked inductivity of 16662 backedges. 129 proven. 16512 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-01-09 22:27:45,158 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1530236524] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-09 22:27:45,158 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-09 22:27:45,158 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [131, 131, 131] total 261 [2022-01-09 22:27:45,158 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1817332226] [2022-01-09 22:27:45,158 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-09 22:27:45,159 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 261 states [2022-01-09 22:27:45,159 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-09 22:27:45,165 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 261 interpolants. [2022-01-09 22:27:45,169 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33930, Invalid=33930, Unknown=0, NotChecked=0, Total=67860 [2022-01-09 22:27:45,171 INFO L87 Difference]: Start difference. First operand 272 states and 274 transitions. Second operand has 261 states, 261 states have (on average 2.0229885057471266) internal successors, (528), 261 states have internal predecessors, (528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 22:27:46,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-09 22:27:46,004 INFO L93 Difference]: Finished difference Result 546 states and 680 transitions. [2022-01-09 22:27:46,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 260 states. [2022-01-09 22:27:46,005 INFO L78 Accepts]: Start accepts. Automaton has has 261 states, 261 states have (on average 2.0229885057471266) internal successors, (528), 261 states have internal predecessors, (528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 271 [2022-01-09 22:27:46,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-09 22:27:46,007 INFO L225 Difference]: With dead ends: 546 [2022-01-09 22:27:46,007 INFO L226 Difference]: Without dead ends: 532 [2022-01-09 22:27:46,009 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 671 GetRequests, 412 SyntacticMatches, 0 SemanticMatches, 259 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 512 ImplicationChecksByTransitivity, 14.4s TimeCoverageRelationStatistics Valid=33930, Invalid=33930, Unknown=0, NotChecked=0, Total=67860 [2022-01-09 22:27:46,009 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 0 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 540 mSolverCounterSat, 135 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 675 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 135 IncrementalHoareTripleChecker+Valid, 540 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-09 22:27:46,010 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 29 Invalid, 675 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [135 Valid, 540 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-09 22:27:46,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 532 states. [2022-01-09 22:27:46,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 532 to 532. [2022-01-09 22:27:46,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 532 states, 531 states have (on average 1.0056497175141244) internal successors, (534), 531 states have internal predecessors, (534), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 22:27:46,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 532 states to 532 states and 534 transitions. [2022-01-09 22:27:46,046 INFO L78 Accepts]: Start accepts. Automaton has 532 states and 534 transitions. Word has length 271 [2022-01-09 22:27:46,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-09 22:27:46,046 INFO L470 AbstractCegarLoop]: Abstraction has 532 states and 534 transitions. [2022-01-09 22:27:46,047 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 261 states, 261 states have (on average 2.0229885057471266) internal successors, (528), 261 states have internal predecessors, (528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 22:27:46,047 INFO L276 IsEmpty]: Start isEmpty. Operand 532 states and 534 transitions. [2022-01-09 22:27:46,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 532 [2022-01-09 22:27:46,051 INFO L506 BasicCegarLoop]: Found error trace [2022-01-09 22:27:46,051 INFO L514 BasicCegarLoop]: trace histogram [259, 258, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-09 22:27:46,069 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 22:27:46,268 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-09 22:27:46,268 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-09 22:27:46,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-09 22:27:46,269 INFO L85 PathProgramCache]: Analyzing trace with hash 1610521155, now seen corresponding path program 6 times [2022-01-09 22:27:46,269 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-09 22:27:46,269 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1391985076] [2022-01-09 22:27:46,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 22:27:46,269 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-09 22:27:46,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 22:28:02,651 INFO L134 CoverageAnalysis]: Checked inductivity of 67102 backedges. 259 proven. 66822 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-01-09 22:28:02,651 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-09 22:28:02,651 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1391985076] [2022-01-09 22:28:02,651 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1391985076] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-09 22:28:02,651 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [838954801] [2022-01-09 22:28:02,651 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-09 22:28:02,651 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-09 22:28:02,651 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-09 22:28:02,656 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 22:28:02,663 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 22:28:02,714 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-01-09 22:28:02,715 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-09 22:28:02,715 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-09 22:28:02,719 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-09 22:28:03,291 INFO L134 CoverageAnalysis]: Checked inductivity of 67102 backedges. 774 proven. 1 refuted. 0 times theorem prover too weak. 66327 trivial. 0 not checked. [2022-01-09 22:28:03,291 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-09 22:28:03,813 INFO L134 CoverageAnalysis]: Checked inductivity of 67102 backedges. 774 proven. 1 refuted. 0 times theorem prover too weak. 66327 trivial. 0 not checked. [2022-01-09 22:28:03,813 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [838954801] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-09 22:28:03,814 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-09 22:28:03,814 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [261, 4, 4] total 265 [2022-01-09 22:28:03,814 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1535004206] [2022-01-09 22:28:03,814 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-09 22:28:03,815 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 265 states [2022-01-09 22:28:03,815 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-09 22:28:03,818 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 265 interpolants. [2022-01-09 22:28:03,820 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34980, Invalid=34980, Unknown=0, NotChecked=0, Total=69960 [2022-01-09 22:28:03,821 INFO L87 Difference]: Start difference. First operand 532 states and 534 transitions. Second operand has 265 states, 265 states have (on average 2.026415094339623) internal successors, (537), 265 states have internal predecessors, (537), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 22:28:04,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-09 22:28:04,925 INFO L93 Difference]: Finished difference Result 554 states and 565 transitions. [2022-01-09 22:28:04,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 265 states. [2022-01-09 22:28:04,926 INFO L78 Accepts]: Start accepts. Automaton has has 265 states, 265 states have (on average 2.026415094339623) internal successors, (537), 265 states have internal predecessors, (537), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 531 [2022-01-09 22:28:04,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-09 22:28:04,929 INFO L225 Difference]: With dead ends: 554 [2022-01-09 22:28:04,929 INFO L226 Difference]: Without dead ends: 540 [2022-01-09 22:28:04,931 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1321 GetRequests, 1058 SyntacticMatches, 0 SemanticMatches, 263 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 16.2s TimeCoverageRelationStatistics Valid=34980, Invalid=34980, Unknown=0, NotChecked=0, Total=69960 [2022-01-09 22:28:04,931 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 524 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 551 mSolverCounterSat, 533 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 524 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 1084 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 533 IncrementalHoareTripleChecker+Valid, 551 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-09 22:28:04,932 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [524 Valid, 28 Invalid, 1084 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [533 Valid, 551 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-09 22:28:04,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 540 states. [2022-01-09 22:28:04,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 540 to 540. [2022-01-09 22:28:04,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 540 states, 539 states have (on average 1.0111317254174397) internal successors, (545), 539 states have internal predecessors, (545), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 22:28:04,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 540 states to 540 states and 545 transitions. [2022-01-09 22:28:04,949 INFO L78 Accepts]: Start accepts. Automaton has 540 states and 545 transitions. Word has length 531 [2022-01-09 22:28:04,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-09 22:28:04,949 INFO L470 AbstractCegarLoop]: Abstraction has 540 states and 545 transitions. [2022-01-09 22:28:04,950 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 265 states, 265 states have (on average 2.026415094339623) internal successors, (537), 265 states have internal predecessors, (537), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 22:28:04,950 INFO L276 IsEmpty]: Start isEmpty. Operand 540 states and 545 transitions. [2022-01-09 22:28:04,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 540 [2022-01-09 22:28:04,955 INFO L506 BasicCegarLoop]: Found error trace [2022-01-09 22:28:04,955 INFO L514 BasicCegarLoop]: trace histogram [263, 259, 6, 4, 1, 1, 1, 1, 1, 1, 1] [2022-01-09 22:28:04,981 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 22:28:05,181 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,SelfDestructingSolverStorable11 [2022-01-09 22:28:05,181 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-09 22:28:05,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-09 22:28:05,181 INFO L85 PathProgramCache]: Analyzing trace with hash -2107211535, now seen corresponding path program 7 times [2022-01-09 22:28:05,181 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-09 22:28:05,182 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1652960210] [2022-01-09 22:28:05,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 22:28:05,182 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-09 22:28:05,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 22:28:20,737 INFO L134 CoverageAnalysis]: Checked inductivity of 69190 backedges. 1820 proven. 67340 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-01-09 22:28:20,737 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-09 22:28:20,737 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1652960210] [2022-01-09 22:28:20,737 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1652960210] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-09 22:28:20,737 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1952823552] [2022-01-09 22:28:20,737 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-09 22:28:20,737 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-09 22:28:20,738 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-09 22:28:20,738 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 22:28:20,739 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 22:28:20,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 22:28:20,966 INFO L263 TraceCheckSpWp]: Trace formula consists of 1130 conjuncts, 261 conjunts are in the unsatisfiable core [2022-01-09 22:28:20,972 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-09 22:28:21,672 INFO L134 CoverageAnalysis]: Checked inductivity of 69190 backedges. 1820 proven. 67340 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-01-09 22:28:21,672 INFO L328 TraceCheckSpWp]: Computing backward predicates...