/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/eca-rers2012/Problem17_label01.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-a10ec3b [2022-01-10 00:22:56,120 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-10 00:22:56,122 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-10 00:22:56,171 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-01-10 00:22:56,193 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 [2022-01-10 00:22:56,209 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-10 00:22:56,209 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-10 00:22:56,209 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-01-10 00:22:56,209 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-01-10 00:22:56,210 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-01-10 00:22:56,210 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-01-10 00:22:56,210 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-01-10 00:22:56,210 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-01-10 00:22:56,211 INFO L138 SettingsManager]: * Use SBE=true [2022-01-10 00:22:56,211 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-10 00:22:56,211 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-10 00:22:56,211 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-10 00:22:56,211 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-10 00:22:56,211 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-10 00:22:56,211 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-10 00:22:56,212 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-01-10 00:22:56,212 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-10 00:22:56,212 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-10 00:22:56,212 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-10 00:22:56,212 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-10 00:22:56,212 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-10 00:22:56,212 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-10 00:22:56,212 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-10 00:22:56,213 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-01-10 00:22:56,213 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-01-10 00:22:56,213 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-01-10 00:22:56,213 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-01-10 00:22:56,213 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-01-10 00:22:56,213 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-01-10 00:22:56,213 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-01-10 00:22:56,213 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-01-10 00:22:56,373 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-10 00:22:56,389 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-10 00:22:56,391 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-10 00:22:56,392 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-10 00:22:56,392 INFO L275 PluginConnector]: CDTParser initialized [2022-01-10 00:22:56,393 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem17_label01.c [2022-01-10 00:22:56,447 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d9d07a60a/0134512fa082454f8e12abb71a63623a/FLAG0018738d3 [2022-01-10 00:22:56,946 INFO L306 CDTParser]: Found 1 translation units. [2022-01-10 00:22:56,946 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem17_label01.c [2022-01-10 00:22:56,969 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d9d07a60a/0134512fa082454f8e12abb71a63623a/FLAG0018738d3 [2022-01-10 00:22:57,231 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d9d07a60a/0134512fa082454f8e12abb71a63623a [2022-01-10 00:22:57,234 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-10 00:22:57,236 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-01-10 00:22:57,239 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-10 00:22:57,239 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-10 00:22:57,241 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-10 00:22:57,242 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.01 12:22:57" (1/1) ... [2022-01-10 00:22:57,243 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1cb49f10 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 12:22:57, skipping insertion in model container [2022-01-10 00:22:57,243 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.01 12:22:57" (1/1) ... [2022-01-10 00:22:57,247 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-10 00:22:57,302 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-10 00:22:57,468 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem17_label01.c[6877,6890] [2022-01-10 00:22:57,842 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-10 00:22:57,849 INFO L203 MainTranslator]: Completed pre-run [2022-01-10 00:22:57,872 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem17_label01.c[6877,6890] [2022-01-10 00:22:58,085 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-10 00:22:58,098 INFO L208 MainTranslator]: Completed translation [2022-01-10 00:22:58,098 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 12:22:58 WrapperNode [2022-01-10 00:22:58,099 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-10 00:22:58,100 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-01-10 00:22:58,100 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-01-10 00:22:58,100 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-01-10 00:22:58,105 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 12:22:58" (1/1) ... [2022-01-10 00:22:58,138 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 12:22:58" (1/1) ... [2022-01-10 00:22:58,328 INFO L137 Inliner]: procedures = 15, calls = 9, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 2611 [2022-01-10 00:22:58,328 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-01-10 00:22:58,329 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-10 00:22:58,329 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-10 00:22:58,329 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-10 00:22:58,335 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 12:22:58" (1/1) ... [2022-01-10 00:22:58,335 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 12:22:58" (1/1) ... [2022-01-10 00:22:58,376 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 12:22:58" (1/1) ... [2022-01-10 00:22:58,377 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 12:22:58" (1/1) ... [2022-01-10 00:22:58,522 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 12:22:58" (1/1) ... [2022-01-10 00:22:58,552 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 12:22:58" (1/1) ... [2022-01-10 00:22:58,591 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 12:22:58" (1/1) ... [2022-01-10 00:22:58,634 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-10 00:22:58,635 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-10 00:22:58,635 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-10 00:22:58,635 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-10 00:22:58,636 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 12:22:58" (1/1) ... [2022-01-10 00:22:58,641 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-10 00:22:58,649 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 00:22:58,658 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) [2022-01-10 00:22:58,660 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 [2022-01-10 00:22:58,683 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-10 00:22:58,684 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-01-10 00:22:58,684 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-10 00:22:58,684 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-10 00:22:58,730 INFO L234 CfgBuilder]: Building ICFG [2022-01-10 00:22:58,732 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-10 00:23:01,075 INFO L275 CfgBuilder]: Performing block encoding [2022-01-10 00:23:01,086 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-10 00:23:01,086 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-01-10 00:23:01,092 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 12:23:01 BoogieIcfgContainer [2022-01-10 00:23:01,092 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-10 00:23:01,093 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-10 00:23:01,093 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-10 00:23:01,096 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-10 00:23:01,096 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 10.01 12:22:57" (1/3) ... [2022-01-10 00:23:01,097 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@e53ce95 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.01 12:23:01, skipping insertion in model container [2022-01-10 00:23:01,097 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 12:22:58" (2/3) ... [2022-01-10 00:23:01,097 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@e53ce95 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.01 12:23:01, skipping insertion in model container [2022-01-10 00:23:01,097 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 12:23:01" (3/3) ... [2022-01-10 00:23:01,098 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem17_label01.c [2022-01-10 00:23:01,104 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-01-10 00:23:01,104 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-10 00:23:01,150 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-10 00:23:01,156 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 [2022-01-10 00:23:01,156 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-01-10 00:23:01,179 INFO L276 IsEmpty]: Start isEmpty. Operand has 590 states, 588 states have (on average 1.8061224489795917) internal successors, (1062), 589 states have internal predecessors, (1062), 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) [2022-01-10 00:23:01,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-01-10 00:23:01,193 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 00:23:01,194 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 00:23:01,194 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 00:23:01,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 00:23:01,198 INFO L85 PathProgramCache]: Analyzing trace with hash 291089130, now seen corresponding path program 1 times [2022-01-10 00:23:01,204 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 00:23:01,204 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1490946358] [2022-01-10 00:23:01,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 00:23:01,205 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 00:23:01,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 00:23:01,417 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 00:23:01,418 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 00:23:01,418 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1490946358] [2022-01-10 00:23:01,419 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1490946358] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 00:23:01,419 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 00:23:01,419 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-01-10 00:23:01,420 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [217433249] [2022-01-10 00:23:01,421 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 00:23:01,423 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 00:23:01,423 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 00:23:01,446 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 00:23:01,447 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 00:23:01,449 INFO L87 Difference]: Start difference. First operand has 590 states, 588 states have (on average 1.8061224489795917) internal successors, (1062), 589 states have internal predecessors, (1062), 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 3 states, 3 states have (on average 15.333333333333334) internal successors, (46), 2 states have internal predecessors, (46), 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) [2022-01-10 00:23:03,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 00:23:03,671 INFO L93 Difference]: Finished difference Result 1644 states and 3029 transitions. [2022-01-10 00:23:03,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 00:23:03,673 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 15.333333333333334) internal successors, (46), 2 states have internal predecessors, (46), 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 46 [2022-01-10 00:23:03,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 00:23:03,688 INFO L225 Difference]: With dead ends: 1644 [2022-01-10 00:23:03,688 INFO L226 Difference]: Without dead ends: 977 [2022-01-10 00:23:03,693 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 00:23:03,696 INFO L933 BasicCegarLoop]: 425 mSDtfsCounter, 442 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 1470 mSolverCounterSat, 332 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 442 SdHoareTripleChecker+Valid, 503 SdHoareTripleChecker+Invalid, 1802 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 332 IncrementalHoareTripleChecker+Valid, 1470 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2022-01-10 00:23:03,696 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [442 Valid, 503 Invalid, 1802 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [332 Valid, 1470 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2022-01-10 00:23:03,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 977 states. [2022-01-10 00:23:03,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 977 to 971. [2022-01-10 00:23:03,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 971 states, 970 states have (on average 1.5536082474226804) internal successors, (1507), 970 states have internal predecessors, (1507), 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) [2022-01-10 00:23:03,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 971 states to 971 states and 1507 transitions. [2022-01-10 00:23:03,772 INFO L78 Accepts]: Start accepts. Automaton has 971 states and 1507 transitions. Word has length 46 [2022-01-10 00:23:03,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 00:23:03,772 INFO L470 AbstractCegarLoop]: Abstraction has 971 states and 1507 transitions. [2022-01-10 00:23:03,772 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 15.333333333333334) internal successors, (46), 2 states have internal predecessors, (46), 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) [2022-01-10 00:23:03,772 INFO L276 IsEmpty]: Start isEmpty. Operand 971 states and 1507 transitions. [2022-01-10 00:23:03,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2022-01-10 00:23:03,774 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 00:23:03,775 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 00:23:03,775 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-01-10 00:23:03,775 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 00:23:03,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 00:23:03,775 INFO L85 PathProgramCache]: Analyzing trace with hash 63229666, now seen corresponding path program 1 times [2022-01-10 00:23:03,776 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 00:23:03,776 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2136342885] [2022-01-10 00:23:03,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 00:23:03,776 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 00:23:03,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 00:23:03,886 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 43 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 00:23:03,886 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 00:23:03,886 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2136342885] [2022-01-10 00:23:03,886 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2136342885] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 00:23:03,886 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 00:23:03,886 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-01-10 00:23:03,886 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1064854522] [2022-01-10 00:23:03,887 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 00:23:03,887 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 00:23:03,888 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 00:23:03,888 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 00:23:03,888 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 00:23:03,888 INFO L87 Difference]: Start difference. First operand 971 states and 1507 transitions. Second operand has 3 states, 3 states have (on average 37.666666666666664) internal successors, (113), 2 states have internal predecessors, (113), 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) [2022-01-10 00:23:05,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 00:23:05,825 INFO L93 Difference]: Finished difference Result 2813 states and 4381 transitions. [2022-01-10 00:23:05,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 00:23:05,826 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 37.666666666666664) internal successors, (113), 2 states have internal predecessors, (113), 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 113 [2022-01-10 00:23:05,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 00:23:05,831 INFO L225 Difference]: With dead ends: 2813 [2022-01-10 00:23:05,831 INFO L226 Difference]: Without dead ends: 1844 [2022-01-10 00:23:05,834 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 00:23:05,835 INFO L933 BasicCegarLoop]: 506 mSDtfsCounter, 405 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 1381 mSolverCounterSat, 325 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 405 SdHoareTripleChecker+Valid, 579 SdHoareTripleChecker+Invalid, 1706 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 325 IncrementalHoareTripleChecker+Valid, 1381 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-01-10 00:23:05,835 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [405 Valid, 579 Invalid, 1706 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [325 Valid, 1381 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2022-01-10 00:23:05,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1844 states. [2022-01-10 00:23:05,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1844 to 1841. [2022-01-10 00:23:05,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1841 states, 1840 states have (on average 1.35) internal successors, (2484), 1840 states have internal predecessors, (2484), 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) [2022-01-10 00:23:05,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1841 states to 1841 states and 2484 transitions. [2022-01-10 00:23:05,863 INFO L78 Accepts]: Start accepts. Automaton has 1841 states and 2484 transitions. Word has length 113 [2022-01-10 00:23:05,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 00:23:05,863 INFO L470 AbstractCegarLoop]: Abstraction has 1841 states and 2484 transitions. [2022-01-10 00:23:05,863 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 37.666666666666664) internal successors, (113), 2 states have internal predecessors, (113), 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) [2022-01-10 00:23:05,864 INFO L276 IsEmpty]: Start isEmpty. Operand 1841 states and 2484 transitions. [2022-01-10 00:23:05,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2022-01-10 00:23:05,866 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 00:23:05,866 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 00:23:05,866 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-01-10 00:23:05,866 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 00:23:05,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 00:23:05,867 INFO L85 PathProgramCache]: Analyzing trace with hash 1486088630, now seen corresponding path program 1 times [2022-01-10 00:23:05,867 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 00:23:05,867 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [3167048] [2022-01-10 00:23:05,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 00:23:05,867 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 00:23:05,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 00:23:05,989 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 43 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 00:23:05,989 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 00:23:05,989 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [3167048] [2022-01-10 00:23:05,990 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [3167048] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 00:23:05,990 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 00:23:05,990 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 00:23:05,990 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [461219123] [2022-01-10 00:23:05,990 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 00:23:05,991 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-10 00:23:05,991 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 00:23:05,991 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-10 00:23:05,991 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-01-10 00:23:05,992 INFO L87 Difference]: Start difference. First operand 1841 states and 2484 transitions. Second operand has 4 states, 4 states have (on average 29.0) internal successors, (116), 3 states have internal predecessors, (116), 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) [2022-01-10 00:23:09,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 00:23:09,226 INFO L93 Difference]: Finished difference Result 6765 states and 9258 transitions. [2022-01-10 00:23:09,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-10 00:23:09,227 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 29.0) internal successors, (116), 3 states have internal predecessors, (116), 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 116 [2022-01-10 00:23:09,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 00:23:09,240 INFO L225 Difference]: With dead ends: 6765 [2022-01-10 00:23:09,240 INFO L226 Difference]: Without dead ends: 4926 [2022-01-10 00:23:09,244 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-01-10 00:23:09,245 INFO L933 BasicCegarLoop]: 201 mSDtfsCounter, 867 mSDsluCounter, 128 mSDsCounter, 0 mSdLazyCounter, 2789 mSolverCounterSat, 595 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 867 SdHoareTripleChecker+Valid, 329 SdHoareTripleChecker+Invalid, 3384 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 595 IncrementalHoareTripleChecker+Valid, 2789 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2022-01-10 00:23:09,245 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [867 Valid, 329 Invalid, 3384 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [595 Valid, 2789 Invalid, 0 Unknown, 0 Unchecked, 3.1s Time] [2022-01-10 00:23:09,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4926 states. [2022-01-10 00:23:09,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4926 to 4875. [2022-01-10 00:23:09,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4875 states, 4874 states have (on average 1.286417726713172) internal successors, (6270), 4874 states have internal predecessors, (6270), 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) [2022-01-10 00:23:09,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4875 states to 4875 states and 6270 transitions. [2022-01-10 00:23:09,316 INFO L78 Accepts]: Start accepts. Automaton has 4875 states and 6270 transitions. Word has length 116 [2022-01-10 00:23:09,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 00:23:09,317 INFO L470 AbstractCegarLoop]: Abstraction has 4875 states and 6270 transitions. [2022-01-10 00:23:09,317 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 29.0) internal successors, (116), 3 states have internal predecessors, (116), 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) [2022-01-10 00:23:09,317 INFO L276 IsEmpty]: Start isEmpty. Operand 4875 states and 6270 transitions. [2022-01-10 00:23:09,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 188 [2022-01-10 00:23:09,320 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 00:23:09,320 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 00:23:09,320 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-01-10 00:23:09,320 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 00:23:09,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 00:23:09,321 INFO L85 PathProgramCache]: Analyzing trace with hash -1454031604, now seen corresponding path program 1 times [2022-01-10 00:23:09,321 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 00:23:09,321 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2116601108] [2022-01-10 00:23:09,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 00:23:09,321 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 00:23:09,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 00:23:09,396 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 87 proven. 0 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2022-01-10 00:23:09,396 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 00:23:09,396 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2116601108] [2022-01-10 00:23:09,396 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2116601108] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 00:23:09,396 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 00:23:09,396 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-01-10 00:23:09,396 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2031849199] [2022-01-10 00:23:09,397 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 00:23:09,397 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 00:23:09,397 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 00:23:09,397 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 00:23:09,398 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 00:23:09,398 INFO L87 Difference]: Start difference. First operand 4875 states and 6270 transitions. Second operand has 3 states, 3 states have (on average 39.666666666666664) internal successors, (119), 2 states have internal predecessors, (119), 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) [2022-01-10 00:23:10,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 00:23:10,990 INFO L93 Difference]: Finished difference Result 14436 states and 18541 transitions. [2022-01-10 00:23:10,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 00:23:10,990 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 39.666666666666664) internal successors, (119), 2 states have internal predecessors, (119), 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 187 [2022-01-10 00:23:10,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 00:23:11,010 INFO L225 Difference]: With dead ends: 14436 [2022-01-10 00:23:11,010 INFO L226 Difference]: Without dead ends: 8277 [2022-01-10 00:23:11,018 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 00:23:11,019 INFO L933 BasicCegarLoop]: 515 mSDtfsCounter, 386 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 1081 mSolverCounterSat, 548 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 386 SdHoareTripleChecker+Valid, 590 SdHoareTripleChecker+Invalid, 1629 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 548 IncrementalHoareTripleChecker+Valid, 1081 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-01-10 00:23:11,019 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [386 Valid, 590 Invalid, 1629 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [548 Valid, 1081 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-01-10 00:23:11,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8277 states. [2022-01-10 00:23:11,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8277 to 6147. [2022-01-10 00:23:11,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6147 states, 6146 states have (on average 1.1906931337455255) internal successors, (7318), 6146 states have internal predecessors, (7318), 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) [2022-01-10 00:23:11,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6147 states to 6147 states and 7318 transitions. [2022-01-10 00:23:11,162 INFO L78 Accepts]: Start accepts. Automaton has 6147 states and 7318 transitions. Word has length 187 [2022-01-10 00:23:11,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 00:23:11,162 INFO L470 AbstractCegarLoop]: Abstraction has 6147 states and 7318 transitions. [2022-01-10 00:23:11,162 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 39.666666666666664) internal successors, (119), 2 states have internal predecessors, (119), 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) [2022-01-10 00:23:11,162 INFO L276 IsEmpty]: Start isEmpty. Operand 6147 states and 7318 transitions. [2022-01-10 00:23:11,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 201 [2022-01-10 00:23:11,164 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 00:23:11,164 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 00:23:11,164 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-01-10 00:23:11,164 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 00:23:11,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 00:23:11,165 INFO L85 PathProgramCache]: Analyzing trace with hash 877442312, now seen corresponding path program 1 times [2022-01-10 00:23:11,165 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 00:23:11,165 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1024331352] [2022-01-10 00:23:11,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 00:23:11,165 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 00:23:11,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 00:23:11,236 INFO L134 CoverageAnalysis]: Checked inductivity of 157 backedges. 87 proven. 0 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2022-01-10 00:23:11,236 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 00:23:11,236 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1024331352] [2022-01-10 00:23:11,236 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1024331352] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 00:23:11,236 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 00:23:11,236 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 00:23:11,236 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2091416783] [2022-01-10 00:23:11,237 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 00:23:11,237 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 00:23:11,237 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 00:23:11,237 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 00:23:11,237 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 00:23:11,238 INFO L87 Difference]: Start difference. First operand 6147 states and 7318 transitions. Second operand has 3 states, 3 states have (on average 43.666666666666664) internal successors, (131), 3 states have internal predecessors, (131), 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) [2022-01-10 00:23:12,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 00:23:12,881 INFO L93 Difference]: Finished difference Result 15692 states and 18897 transitions. [2022-01-10 00:23:12,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 00:23:12,881 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 43.666666666666664) internal successors, (131), 3 states have internal predecessors, (131), 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 200 [2022-01-10 00:23:12,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 00:23:12,904 INFO L225 Difference]: With dead ends: 15692 [2022-01-10 00:23:12,904 INFO L226 Difference]: Without dead ends: 9547 [2022-01-10 00:23:12,910 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 00:23:12,915 INFO L933 BasicCegarLoop]: 413 mSDtfsCounter, 414 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 1274 mSolverCounterSat, 318 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 414 SdHoareTripleChecker+Valid, 477 SdHoareTripleChecker+Invalid, 1592 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 318 IncrementalHoareTripleChecker+Valid, 1274 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-01-10 00:23:12,915 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [414 Valid, 477 Invalid, 1592 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [318 Valid, 1274 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-01-10 00:23:12,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9547 states. [2022-01-10 00:23:12,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9547 to 6124. [2022-01-10 00:23:13,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6124 states, 6123 states have (on average 1.1894496162012085) internal successors, (7283), 6123 states have internal predecessors, (7283), 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) [2022-01-10 00:23:13,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6124 states to 6124 states and 7283 transitions. [2022-01-10 00:23:13,012 INFO L78 Accepts]: Start accepts. Automaton has 6124 states and 7283 transitions. Word has length 200 [2022-01-10 00:23:13,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 00:23:13,013 INFO L470 AbstractCegarLoop]: Abstraction has 6124 states and 7283 transitions. [2022-01-10 00:23:13,013 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 43.666666666666664) internal successors, (131), 3 states have internal predecessors, (131), 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) [2022-01-10 00:23:13,013 INFO L276 IsEmpty]: Start isEmpty. Operand 6124 states and 7283 transitions. [2022-01-10 00:23:13,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 208 [2022-01-10 00:23:13,016 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 00:23:13,016 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 00:23:13,016 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-01-10 00:23:13,016 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 00:23:13,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 00:23:13,017 INFO L85 PathProgramCache]: Analyzing trace with hash 1977830355, now seen corresponding path program 1 times [2022-01-10 00:23:13,017 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 00:23:13,017 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2138621185] [2022-01-10 00:23:13,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 00:23:13,020 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 00:23:13,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 00:23:13,143 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 162 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 00:23:13,143 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 00:23:13,144 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2138621185] [2022-01-10 00:23:13,144 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2138621185] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 00:23:13,144 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 00:23:13,144 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-10 00:23:13,144 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2145248684] [2022-01-10 00:23:13,144 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 00:23:13,144 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 00:23:13,145 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 00:23:13,145 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 00:23:13,145 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-01-10 00:23:13,146 INFO L87 Difference]: Start difference. First operand 6124 states and 7283 transitions. Second operand has 5 states, 5 states have (on average 41.4) internal successors, (207), 5 states have internal predecessors, (207), 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) [2022-01-10 00:23:15,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 00:23:15,144 INFO L93 Difference]: Finished difference Result 16114 states and 19480 transitions. [2022-01-10 00:23:15,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-10 00:23:15,145 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 41.4) internal successors, (207), 5 states have internal predecessors, (207), 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 207 [2022-01-10 00:23:15,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 00:23:15,164 INFO L225 Difference]: With dead ends: 16114 [2022-01-10 00:23:15,165 INFO L226 Difference]: Without dead ends: 9992 [2022-01-10 00:23:15,171 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-01-10 00:23:15,172 INFO L933 BasicCegarLoop]: 730 mSDtfsCounter, 600 mSDsluCounter, 133 mSDsCounter, 0 mSdLazyCounter, 2336 mSolverCounterSat, 558 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 600 SdHoareTripleChecker+Valid, 863 SdHoareTripleChecker+Invalid, 2894 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 558 IncrementalHoareTripleChecker+Valid, 2336 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-01-10 00:23:15,172 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [600 Valid, 863 Invalid, 2894 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [558 Valid, 2336 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2022-01-10 00:23:15,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9992 states. [2022-01-10 00:23:15,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9992 to 9956. [2022-01-10 00:23:15,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9956 states, 9955 states have (on average 1.171672526368659) internal successors, (11664), 9955 states have internal predecessors, (11664), 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) [2022-01-10 00:23:15,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9956 states to 9956 states and 11664 transitions. [2022-01-10 00:23:15,329 INFO L78 Accepts]: Start accepts. Automaton has 9956 states and 11664 transitions. Word has length 207 [2022-01-10 00:23:15,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 00:23:15,329 INFO L470 AbstractCegarLoop]: Abstraction has 9956 states and 11664 transitions. [2022-01-10 00:23:15,329 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 41.4) internal successors, (207), 5 states have internal predecessors, (207), 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) [2022-01-10 00:23:15,329 INFO L276 IsEmpty]: Start isEmpty. Operand 9956 states and 11664 transitions. [2022-01-10 00:23:15,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 271 [2022-01-10 00:23:15,332 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 00:23:15,332 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 00:23:15,332 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-01-10 00:23:15,332 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 00:23:15,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 00:23:15,332 INFO L85 PathProgramCache]: Analyzing trace with hash 1969648980, now seen corresponding path program 1 times [2022-01-10 00:23:15,332 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 00:23:15,333 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [254503894] [2022-01-10 00:23:15,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 00:23:15,333 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 00:23:15,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 00:23:15,465 INFO L134 CoverageAnalysis]: Checked inductivity of 340 backedges. 226 proven. 70 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2022-01-10 00:23:15,465 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 00:23:15,466 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [254503894] [2022-01-10 00:23:15,466 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [254503894] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-10 00:23:15,466 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [454562076] [2022-01-10 00:23:15,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 00:23:15,466 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 00:23:15,466 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 00:23:15,467 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) [2022-01-10 00:23:15,470 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-01-10 00:23:15,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 00:23:15,563 INFO L263 TraceCheckSpWp]: Trace formula consists of 406 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-10 00:23:15,572 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 00:23:16,234 INFO L134 CoverageAnalysis]: Checked inductivity of 340 backedges. 226 proven. 70 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2022-01-10 00:23:16,234 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 00:23:16,671 INFO L134 CoverageAnalysis]: Checked inductivity of 340 backedges. 296 proven. 0 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2022-01-10 00:23:16,672 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [454562076] provided 1 perfect and 1 imperfect interpolant sequences [2022-01-10 00:23:16,672 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-01-10 00:23:16,672 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3, 3] total 5 [2022-01-10 00:23:16,672 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1497891280] [2022-01-10 00:23:16,672 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 00:23:16,673 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-10 00:23:16,673 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 00:23:16,673 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-10 00:23:16,673 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-01-10 00:23:16,673 INFO L87 Difference]: Start difference. First operand 9956 states and 11664 transitions. Second operand has 4 states, 4 states have (on average 56.75) internal successors, (227), 3 states have internal predecessors, (227), 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) [2022-01-10 00:23:19,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 00:23:19,633 INFO L93 Difference]: Finished difference Result 30575 states and 36167 transitions. [2022-01-10 00:23:19,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-10 00:23:19,634 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 56.75) internal successors, (227), 3 states have internal predecessors, (227), 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 270 [2022-01-10 00:23:19,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 00:23:19,665 INFO L225 Difference]: With dead ends: 30575 [2022-01-10 00:23:19,665 INFO L226 Difference]: Without dead ends: 19763 [2022-01-10 00:23:19,676 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 541 GetRequests, 535 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-01-10 00:23:19,676 INFO L933 BasicCegarLoop]: 85 mSDtfsCounter, 1071 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 2242 mSolverCounterSat, 1229 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1071 SdHoareTripleChecker+Valid, 147 SdHoareTripleChecker+Invalid, 3471 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1229 IncrementalHoareTripleChecker+Valid, 2242 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2022-01-10 00:23:19,677 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1071 Valid, 147 Invalid, 3471 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1229 Valid, 2242 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2022-01-10 00:23:19,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19763 states. [2022-01-10 00:23:19,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19763 to 19760. [2022-01-10 00:23:19,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19760 states, 19759 states have (on average 1.1599777316665822) internal successors, (22920), 19759 states have internal predecessors, (22920), 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) [2022-01-10 00:23:19,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19760 states to 19760 states and 22920 transitions. [2022-01-10 00:23:19,872 INFO L78 Accepts]: Start accepts. Automaton has 19760 states and 22920 transitions. Word has length 270 [2022-01-10 00:23:19,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 00:23:19,873 INFO L470 AbstractCegarLoop]: Abstraction has 19760 states and 22920 transitions. [2022-01-10 00:23:19,873 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 56.75) internal successors, (227), 3 states have internal predecessors, (227), 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) [2022-01-10 00:23:19,873 INFO L276 IsEmpty]: Start isEmpty. Operand 19760 states and 22920 transitions. [2022-01-10 00:23:19,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 284 [2022-01-10 00:23:19,875 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 00:23:19,876 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 00:23:19,896 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-01-10 00:23:20,091 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 00:23:20,092 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 00:23:20,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 00:23:20,092 INFO L85 PathProgramCache]: Analyzing trace with hash -2103078840, now seen corresponding path program 1 times [2022-01-10 00:23:20,092 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 00:23:20,092 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1925559219] [2022-01-10 00:23:20,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 00:23:20,092 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 00:23:20,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 00:23:20,166 INFO L134 CoverageAnalysis]: Checked inductivity of 355 backedges. 274 proven. 0 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2022-01-10 00:23:20,167 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 00:23:20,167 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1925559219] [2022-01-10 00:23:20,167 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1925559219] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 00:23:20,167 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 00:23:20,167 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 00:23:20,167 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [609192099] [2022-01-10 00:23:20,167 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 00:23:20,167 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 00:23:20,167 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 00:23:20,168 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 00:23:20,168 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 00:23:20,168 INFO L87 Difference]: Start difference. First operand 19760 states and 22920 transitions. Second operand has 3 states, 3 states have (on average 67.66666666666667) internal successors, (203), 3 states have internal predecessors, (203), 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) [2022-01-10 00:23:21,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 00:23:21,806 INFO L93 Difference]: Finished difference Result 42909 states and 49989 transitions. [2022-01-10 00:23:21,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 00:23:21,807 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 67.66666666666667) internal successors, (203), 3 states have internal predecessors, (203), 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 283 [2022-01-10 00:23:21,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 00:23:21,841 INFO L225 Difference]: With dead ends: 42909 [2022-01-10 00:23:21,841 INFO L226 Difference]: Without dead ends: 23151 [2022-01-10 00:23:21,857 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 00:23:21,857 INFO L933 BasicCegarLoop]: 826 mSDtfsCounter, 374 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 1237 mSolverCounterSat, 220 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 374 SdHoareTripleChecker+Valid, 896 SdHoareTripleChecker+Invalid, 1457 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 220 IncrementalHoareTripleChecker+Valid, 1237 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-01-10 00:23:21,858 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [374 Valid, 896 Invalid, 1457 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [220 Valid, 1237 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-01-10 00:23:21,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23151 states. [2022-01-10 00:23:22,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23151 to 22725. [2022-01-10 00:23:22,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22725 states, 22724 states have (on average 1.1456169688435134) internal successors, (26033), 22724 states have internal predecessors, (26033), 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) [2022-01-10 00:23:22,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22725 states to 22725 states and 26033 transitions. [2022-01-10 00:23:22,076 INFO L78 Accepts]: Start accepts. Automaton has 22725 states and 26033 transitions. Word has length 283 [2022-01-10 00:23:22,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 00:23:22,077 INFO L470 AbstractCegarLoop]: Abstraction has 22725 states and 26033 transitions. [2022-01-10 00:23:22,077 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 67.66666666666667) internal successors, (203), 3 states have internal predecessors, (203), 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) [2022-01-10 00:23:22,077 INFO L276 IsEmpty]: Start isEmpty. Operand 22725 states and 26033 transitions. [2022-01-10 00:23:22,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 307 [2022-01-10 00:23:22,081 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 00:23:22,081 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 00:23:22,081 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-01-10 00:23:22,081 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 00:23:22,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 00:23:22,082 INFO L85 PathProgramCache]: Analyzing trace with hash 505503923, now seen corresponding path program 1 times [2022-01-10 00:23:22,082 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 00:23:22,082 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [531156705] [2022-01-10 00:23:22,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 00:23:22,082 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 00:23:22,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 00:23:22,188 INFO L134 CoverageAnalysis]: Checked inductivity of 356 backedges. 274 proven. 0 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2022-01-10 00:23:22,189 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 00:23:22,189 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [531156705] [2022-01-10 00:23:22,189 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [531156705] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 00:23:22,189 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 00:23:22,189 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 00:23:22,191 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1631100674] [2022-01-10 00:23:22,192 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 00:23:22,192 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-10 00:23:22,192 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 00:23:22,192 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-10 00:23:22,192 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-01-10 00:23:22,193 INFO L87 Difference]: Start difference. First operand 22725 states and 26033 transitions. Second operand has 4 states, 4 states have (on average 56.25) internal successors, (225), 4 states have internal predecessors, (225), 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) [2022-01-10 00:23:25,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 00:23:25,301 INFO L93 Difference]: Finished difference Result 64239 states and 73655 transitions. [2022-01-10 00:23:25,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-10 00:23:25,301 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 56.25) internal successors, (225), 4 states have internal predecessors, (225), 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 306 [2022-01-10 00:23:25,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 00:23:25,358 INFO L225 Difference]: With dead ends: 64239 [2022-01-10 00:23:25,359 INFO L226 Difference]: Without dead ends: 38537 [2022-01-10 00:23:25,379 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-01-10 00:23:25,379 INFO L933 BasicCegarLoop]: 249 mSDtfsCounter, 863 mSDsluCounter, 121 mSDsCounter, 0 mSdLazyCounter, 2909 mSolverCounterSat, 469 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 863 SdHoareTripleChecker+Valid, 370 SdHoareTripleChecker+Invalid, 3378 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 469 IncrementalHoareTripleChecker+Valid, 2909 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2022-01-10 00:23:25,380 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [863 Valid, 370 Invalid, 3378 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [469 Valid, 2909 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2022-01-10 00:23:25,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38537 states. [2022-01-10 00:23:25,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38537 to 38056. [2022-01-10 00:23:25,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38056 states, 38055 states have (on average 1.1408750492707922) internal successors, (43416), 38055 states have internal predecessors, (43416), 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) [2022-01-10 00:23:25,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38056 states to 38056 states and 43416 transitions. [2022-01-10 00:23:25,818 INFO L78 Accepts]: Start accepts. Automaton has 38056 states and 43416 transitions. Word has length 306 [2022-01-10 00:23:25,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 00:23:25,818 INFO L470 AbstractCegarLoop]: Abstraction has 38056 states and 43416 transitions. [2022-01-10 00:23:25,818 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 56.25) internal successors, (225), 4 states have internal predecessors, (225), 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) [2022-01-10 00:23:25,818 INFO L276 IsEmpty]: Start isEmpty. Operand 38056 states and 43416 transitions. [2022-01-10 00:23:25,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 319 [2022-01-10 00:23:25,823 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 00:23:25,823 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 00:23:25,823 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-01-10 00:23:25,823 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 00:23:25,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 00:23:25,823 INFO L85 PathProgramCache]: Analyzing trace with hash 462278318, now seen corresponding path program 1 times [2022-01-10 00:23:25,824 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 00:23:25,824 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [142388796] [2022-01-10 00:23:25,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 00:23:25,824 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 00:23:25,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 00:23:25,904 INFO L134 CoverageAnalysis]: Checked inductivity of 379 backedges. 131 proven. 0 refuted. 0 times theorem prover too weak. 248 trivial. 0 not checked. [2022-01-10 00:23:25,904 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 00:23:25,905 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [142388796] [2022-01-10 00:23:25,905 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [142388796] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 00:23:25,905 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 00:23:25,905 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 00:23:25,905 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [45703466] [2022-01-10 00:23:25,905 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 00:23:25,905 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 00:23:25,905 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 00:23:25,906 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 00:23:25,906 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 00:23:25,906 INFO L87 Difference]: Start difference. First operand 38056 states and 43416 transitions. Second operand has 3 states, 3 states have (on average 51.333333333333336) internal successors, (154), 3 states have internal predecessors, (154), 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) [2022-01-10 00:23:27,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 00:23:27,718 INFO L93 Difference]: Finished difference Result 91844 states and 104584 transitions. [2022-01-10 00:23:27,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 00:23:27,718 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 51.333333333333336) internal successors, (154), 3 states have internal predecessors, (154), 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 318 [2022-01-10 00:23:27,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 00:23:27,785 INFO L225 Difference]: With dead ends: 91844 [2022-01-10 00:23:27,785 INFO L226 Difference]: Without dead ends: 53358 [2022-01-10 00:23:27,811 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 00:23:27,812 INFO L933 BasicCegarLoop]: 375 mSDtfsCounter, 424 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 1298 mSolverCounterSat, 248 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 424 SdHoareTripleChecker+Valid, 431 SdHoareTripleChecker+Invalid, 1546 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 248 IncrementalHoareTripleChecker+Valid, 1298 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-01-10 00:23:27,812 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [424 Valid, 431 Invalid, 1546 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [248 Valid, 1298 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-01-10 00:23:27,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53358 states. [2022-01-10 00:23:28,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53358 to 49524. [2022-01-10 00:23:28,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49524 states, 49523 states have (on average 1.1243866486279102) internal successors, (55683), 49523 states have internal predecessors, (55683), 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) [2022-01-10 00:23:28,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49524 states to 49524 states and 55683 transitions. [2022-01-10 00:23:28,567 INFO L78 Accepts]: Start accepts. Automaton has 49524 states and 55683 transitions. Word has length 318 [2022-01-10 00:23:28,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 00:23:28,567 INFO L470 AbstractCegarLoop]: Abstraction has 49524 states and 55683 transitions. [2022-01-10 00:23:28,567 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 51.333333333333336) internal successors, (154), 3 states have internal predecessors, (154), 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) [2022-01-10 00:23:28,567 INFO L276 IsEmpty]: Start isEmpty. Operand 49524 states and 55683 transitions. [2022-01-10 00:23:28,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 322 [2022-01-10 00:23:28,571 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 00:23:28,572 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 00:23:28,572 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-01-10 00:23:28,572 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 00:23:28,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 00:23:28,572 INFO L85 PathProgramCache]: Analyzing trace with hash -948205666, now seen corresponding path program 1 times [2022-01-10 00:23:28,572 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 00:23:28,572 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [632958597] [2022-01-10 00:23:28,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 00:23:28,573 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 00:23:28,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 00:23:28,648 INFO L134 CoverageAnalysis]: Checked inductivity of 356 backedges. 312 proven. 0 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2022-01-10 00:23:28,649 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 00:23:28,649 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [632958597] [2022-01-10 00:23:28,649 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [632958597] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 00:23:28,649 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 00:23:28,649 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 00:23:28,819 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1620506228] [2022-01-10 00:23:28,819 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 00:23:28,820 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 00:23:28,820 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 00:23:28,820 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 00:23:28,820 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 00:23:28,821 INFO L87 Difference]: Start difference. First operand 49524 states and 55683 transitions. Second operand has 3 states, 3 states have (on average 92.66666666666667) internal successors, (278), 3 states have internal predecessors, (278), 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) [2022-01-10 00:23:30,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 00:23:30,715 INFO L93 Difference]: Finished difference Result 114397 states and 129047 transitions. [2022-01-10 00:23:30,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 00:23:30,715 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 92.66666666666667) internal successors, (278), 3 states have internal predecessors, (278), 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 321 [2022-01-10 00:23:30,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 00:23:30,783 INFO L225 Difference]: With dead ends: 114397 [2022-01-10 00:23:30,784 INFO L226 Difference]: Without dead ends: 63173 [2022-01-10 00:23:30,798 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 00:23:30,798 INFO L933 BasicCegarLoop]: 745 mSDtfsCounter, 364 mSDsluCounter, 71 mSDsCounter, 0 mSdLazyCounter, 1224 mSolverCounterSat, 251 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 364 SdHoareTripleChecker+Valid, 816 SdHoareTripleChecker+Invalid, 1475 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 251 IncrementalHoareTripleChecker+Valid, 1224 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-01-10 00:23:30,798 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [364 Valid, 816 Invalid, 1475 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [251 Valid, 1224 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-01-10 00:23:30,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63173 states. [2022-01-10 00:23:31,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63173 to 61886. [2022-01-10 00:23:31,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61886 states, 61885 states have (on average 1.1074089036115375) internal successors, (68532), 61885 states have internal predecessors, (68532), 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) [2022-01-10 00:23:31,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61886 states to 61886 states and 68532 transitions. [2022-01-10 00:23:31,472 INFO L78 Accepts]: Start accepts. Automaton has 61886 states and 68532 transitions. Word has length 321 [2022-01-10 00:23:31,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 00:23:31,472 INFO L470 AbstractCegarLoop]: Abstraction has 61886 states and 68532 transitions. [2022-01-10 00:23:31,473 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 92.66666666666667) internal successors, (278), 3 states have internal predecessors, (278), 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) [2022-01-10 00:23:31,473 INFO L276 IsEmpty]: Start isEmpty. Operand 61886 states and 68532 transitions. [2022-01-10 00:23:31,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 345 [2022-01-10 00:23:31,476 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 00:23:31,476 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 00:23:31,477 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-01-10 00:23:31,477 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 00:23:31,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 00:23:31,477 INFO L85 PathProgramCache]: Analyzing trace with hash 932540690, now seen corresponding path program 1 times [2022-01-10 00:23:31,477 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 00:23:31,477 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1301148384] [2022-01-10 00:23:31,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 00:23:31,478 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 00:23:31,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 00:23:31,582 INFO L134 CoverageAnalysis]: Checked inductivity of 598 backedges. 340 proven. 214 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2022-01-10 00:23:31,583 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 00:23:31,583 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1301148384] [2022-01-10 00:23:31,583 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1301148384] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-10 00:23:31,583 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1713459910] [2022-01-10 00:23:31,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 00:23:31,583 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 00:23:31,583 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 00:23:31,584 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) [2022-01-10 00:23:31,585 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-01-10 00:23:31,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 00:23:31,839 INFO L263 TraceCheckSpWp]: Trace formula consists of 504 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-10 00:23:31,842 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 00:23:32,519 INFO L134 CoverageAnalysis]: Checked inductivity of 598 backedges. 367 proven. 73 refuted. 0 times theorem prover too weak. 158 trivial. 0 not checked. [2022-01-10 00:23:32,519 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 00:23:33,042 INFO L134 CoverageAnalysis]: Checked inductivity of 598 backedges. 440 proven. 0 refuted. 0 times theorem prover too weak. 158 trivial. 0 not checked. [2022-01-10 00:23:33,043 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1713459910] provided 1 perfect and 1 imperfect interpolant sequences [2022-01-10 00:23:33,043 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-01-10 00:23:33,043 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4, 3] total 6 [2022-01-10 00:23:33,043 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [109673292] [2022-01-10 00:23:33,043 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 00:23:33,043 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-10 00:23:33,043 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 00:23:33,044 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-10 00:23:33,044 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-01-10 00:23:33,044 INFO L87 Difference]: Start difference. First operand 61886 states and 68532 transitions. Second operand has 4 states, 4 states have (on average 58.0) internal successors, (232), 3 states have internal predecessors, (232), 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) [2022-01-10 00:23:36,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 00:23:36,141 INFO L93 Difference]: Finished difference Result 144217 states and 159922 transitions. [2022-01-10 00:23:36,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-10 00:23:36,142 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 58.0) internal successors, (232), 3 states have internal predecessors, (232), 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 344 [2022-01-10 00:23:36,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 00:23:36,361 INFO L225 Difference]: With dead ends: 144217 [2022-01-10 00:23:36,361 INFO L226 Difference]: Without dead ends: 82333 [2022-01-10 00:23:36,373 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 690 GetRequests, 683 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-01-10 00:23:36,374 INFO L933 BasicCegarLoop]: 81 mSDtfsCounter, 909 mSDsluCounter, 93 mSDsCounter, 0 mSdLazyCounter, 2318 mSolverCounterSat, 679 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 909 SdHoareTripleChecker+Valid, 174 SdHoareTripleChecker+Invalid, 2997 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 679 IncrementalHoareTripleChecker+Valid, 2318 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2022-01-10 00:23:36,375 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [909 Valid, 174 Invalid, 2997 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [679 Valid, 2318 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2022-01-10 00:23:36,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82333 states. [2022-01-10 00:23:37,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82333 to 77653. [2022-01-10 00:23:37,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77653 states, 77652 states have (on average 1.1105702364394994) internal successors, (86238), 77652 states have internal predecessors, (86238), 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) [2022-01-10 00:23:37,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77653 states to 77653 states and 86238 transitions. [2022-01-10 00:23:37,308 INFO L78 Accepts]: Start accepts. Automaton has 77653 states and 86238 transitions. Word has length 344 [2022-01-10 00:23:37,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 00:23:37,308 INFO L470 AbstractCegarLoop]: Abstraction has 77653 states and 86238 transitions. [2022-01-10 00:23:37,309 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 58.0) internal successors, (232), 3 states have internal predecessors, (232), 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) [2022-01-10 00:23:37,309 INFO L276 IsEmpty]: Start isEmpty. Operand 77653 states and 86238 transitions. [2022-01-10 00:23:37,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 375 [2022-01-10 00:23:37,313 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 00:23:37,314 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 00:23:37,353 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-01-10 00:23:37,543 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,SelfDestructingSolverStorable11 [2022-01-10 00:23:37,543 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 00:23:37,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 00:23:37,544 INFO L85 PathProgramCache]: Analyzing trace with hash 1459095844, now seen corresponding path program 1 times [2022-01-10 00:23:37,544 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 00:23:37,544 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1784509428] [2022-01-10 00:23:37,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 00:23:37,544 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 00:23:37,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 00:23:37,631 INFO L134 CoverageAnalysis]: Checked inductivity of 603 backedges. 386 proven. 0 refuted. 0 times theorem prover too weak. 217 trivial. 0 not checked. [2022-01-10 00:23:37,631 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 00:23:37,631 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1784509428] [2022-01-10 00:23:37,631 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1784509428] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 00:23:37,631 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 00:23:37,631 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 00:23:37,631 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1874410977] [2022-01-10 00:23:37,631 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 00:23:37,632 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 00:23:37,632 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 00:23:37,632 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 00:23:37,632 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 00:23:37,632 INFO L87 Difference]: Start difference. First operand 77653 states and 86238 transitions. Second operand has 3 states, 3 states have (on average 75.33333333333333) internal successors, (226), 3 states have internal predecessors, (226), 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) [2022-01-10 00:23:39,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 00:23:39,486 INFO L93 Difference]: Finished difference Result 168920 states and 188110 transitions. [2022-01-10 00:23:39,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 00:23:39,486 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 75.33333333333333) internal successors, (226), 3 states have internal predecessors, (226), 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 374 [2022-01-10 00:23:39,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 00:23:39,691 INFO L225 Difference]: With dead ends: 168920 [2022-01-10 00:23:39,692 INFO L226 Difference]: Without dead ends: 90417 [2022-01-10 00:23:39,728 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 00:23:39,728 INFO L933 BasicCegarLoop]: 766 mSDtfsCounter, 392 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 1191 mSolverCounterSat, 288 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 392 SdHoareTripleChecker+Valid, 824 SdHoareTripleChecker+Invalid, 1479 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 288 IncrementalHoareTripleChecker+Valid, 1191 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-01-10 00:23:39,728 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [392 Valid, 824 Invalid, 1479 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [288 Valid, 1191 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-01-10 00:23:39,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90417 states. [2022-01-10 00:23:40,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90417 to 75491. [2022-01-10 00:23:40,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75491 states, 75490 states have (on average 1.1091932706318717) internal successors, (83733), 75490 states have internal predecessors, (83733), 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) [2022-01-10 00:23:40,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75491 states to 75491 states and 83733 transitions. [2022-01-10 00:23:40,799 INFO L78 Accepts]: Start accepts. Automaton has 75491 states and 83733 transitions. Word has length 374 [2022-01-10 00:23:40,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 00:23:40,815 INFO L470 AbstractCegarLoop]: Abstraction has 75491 states and 83733 transitions. [2022-01-10 00:23:40,815 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 75.33333333333333) internal successors, (226), 3 states have internal predecessors, (226), 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) [2022-01-10 00:23:40,815 INFO L276 IsEmpty]: Start isEmpty. Operand 75491 states and 83733 transitions. [2022-01-10 00:23:40,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 380 [2022-01-10 00:23:40,833 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 00:23:40,834 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 00:23:40,834 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-01-10 00:23:40,834 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 00:23:40,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 00:23:40,834 INFO L85 PathProgramCache]: Analyzing trace with hash 581192442, now seen corresponding path program 1 times [2022-01-10 00:23:40,835 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 00:23:40,835 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1308224458] [2022-01-10 00:23:40,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 00:23:40,835 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 00:23:40,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 00:23:41,050 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 131 proven. 0 refuted. 0 times theorem prover too weak. 269 trivial. 0 not checked. [2022-01-10 00:23:41,051 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 00:23:41,051 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1308224458] [2022-01-10 00:23:41,051 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1308224458] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 00:23:41,051 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 00:23:41,051 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 00:23:41,052 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2071444069] [2022-01-10 00:23:41,053 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 00:23:41,053 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 00:23:41,053 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 00:23:41,053 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 00:23:41,053 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 00:23:41,054 INFO L87 Difference]: Start difference. First operand 75491 states and 83733 transitions. Second operand has 3 states, 3 states have (on average 64.66666666666667) internal successors, (194), 3 states have internal predecessors, (194), 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) [2022-01-10 00:23:43,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 00:23:43,151 INFO L93 Difference]: Finished difference Result 156939 states and 174500 transitions. [2022-01-10 00:23:43,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 00:23:43,151 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 64.66666666666667) internal successors, (194), 3 states have internal predecessors, (194), 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 379 [2022-01-10 00:23:43,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 00:23:43,243 INFO L225 Difference]: With dead ends: 156939 [2022-01-10 00:23:43,244 INFO L226 Difference]: Without dead ends: 81022 [2022-01-10 00:23:43,274 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 00:23:43,275 INFO L933 BasicCegarLoop]: 229 mSDtfsCounter, 473 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 1270 mSolverCounterSat, 268 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 473 SdHoareTripleChecker+Valid, 269 SdHoareTripleChecker+Invalid, 1538 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 268 IncrementalHoareTripleChecker+Valid, 1270 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-01-10 00:23:43,275 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [473 Valid, 269 Invalid, 1538 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [268 Valid, 1270 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-01-10 00:23:43,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81022 states. [2022-01-10 00:23:44,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81022 to 78458. [2022-01-10 00:23:44,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78458 states, 78457 states have (on average 1.1072689498706298) internal successors, (86873), 78457 states have internal predecessors, (86873), 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) [2022-01-10 00:23:44,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78458 states to 78458 states and 86873 transitions. [2022-01-10 00:23:44,434 INFO L78 Accepts]: Start accepts. Automaton has 78458 states and 86873 transitions. Word has length 379 [2022-01-10 00:23:44,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 00:23:44,434 INFO L470 AbstractCegarLoop]: Abstraction has 78458 states and 86873 transitions. [2022-01-10 00:23:44,434 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 64.66666666666667) internal successors, (194), 3 states have internal predecessors, (194), 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) [2022-01-10 00:23:44,434 INFO L276 IsEmpty]: Start isEmpty. Operand 78458 states and 86873 transitions. [2022-01-10 00:23:44,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 397 [2022-01-10 00:23:44,439 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 00:23:44,439 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 00:23:44,440 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-01-10 00:23:44,440 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 00:23:44,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 00:23:44,440 INFO L85 PathProgramCache]: Analyzing trace with hash -1328470753, now seen corresponding path program 1 times [2022-01-10 00:23:44,440 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 00:23:44,440 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [611146498] [2022-01-10 00:23:44,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 00:23:44,440 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 00:23:44,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 00:23:44,533 INFO L134 CoverageAnalysis]: Checked inductivity of 636 backedges. 419 proven. 0 refuted. 0 times theorem prover too weak. 217 trivial. 0 not checked. [2022-01-10 00:23:44,534 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 00:23:44,534 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [611146498] [2022-01-10 00:23:44,534 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [611146498] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 00:23:44,534 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 00:23:44,534 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 00:23:44,534 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1221741571] [2022-01-10 00:23:44,534 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 00:23:44,534 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 00:23:44,534 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 00:23:44,535 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 00:23:44,535 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 00:23:44,535 INFO L87 Difference]: Start difference. First operand 78458 states and 86873 transitions. Second operand has 3 states, 3 states have (on average 82.66666666666667) internal successors, (248), 3 states have internal predecessors, (248), 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) [2022-01-10 00:23:46,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 00:23:46,492 INFO L93 Difference]: Finished difference Result 167541 states and 185296 transitions. [2022-01-10 00:23:46,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 00:23:46,492 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 82.66666666666667) internal successors, (248), 3 states have internal predecessors, (248), 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 396 [2022-01-10 00:23:46,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 00:23:46,598 INFO L225 Difference]: With dead ends: 167541 [2022-01-10 00:23:46,598 INFO L226 Difference]: Without dead ends: 88654 [2022-01-10 00:23:46,632 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 00:23:46,633 INFO L933 BasicCegarLoop]: 286 mSDtfsCounter, 392 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 1194 mSolverCounterSat, 280 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 392 SdHoareTripleChecker+Valid, 331 SdHoareTripleChecker+Invalid, 1474 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 280 IncrementalHoareTripleChecker+Valid, 1194 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-01-10 00:23:46,633 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [392 Valid, 331 Invalid, 1474 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [280 Valid, 1194 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-01-10 00:23:46,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88654 states. [2022-01-10 00:23:47,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88654 to 83123. [2022-01-10 00:23:47,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83123 states, 83122 states have (on average 1.0984697192079114) internal successors, (91307), 83122 states have internal predecessors, (91307), 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) [2022-01-10 00:23:47,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83123 states to 83123 states and 91307 transitions. [2022-01-10 00:23:47,642 INFO L78 Accepts]: Start accepts. Automaton has 83123 states and 91307 transitions. Word has length 396 [2022-01-10 00:23:47,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 00:23:47,642 INFO L470 AbstractCegarLoop]: Abstraction has 83123 states and 91307 transitions. [2022-01-10 00:23:47,642 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 82.66666666666667) internal successors, (248), 3 states have internal predecessors, (248), 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) [2022-01-10 00:23:47,642 INFO L276 IsEmpty]: Start isEmpty. Operand 83123 states and 91307 transitions. [2022-01-10 00:23:47,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 427 [2022-01-10 00:23:47,786 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 00:23:47,796 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 00:23:47,796 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-01-10 00:23:47,796 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 00:23:47,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 00:23:47,797 INFO L85 PathProgramCache]: Analyzing trace with hash 419479024, now seen corresponding path program 1 times [2022-01-10 00:23:47,797 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 00:23:47,797 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1719597851] [2022-01-10 00:23:47,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 00:23:47,797 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 00:23:47,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 00:23:47,940 INFO L134 CoverageAnalysis]: Checked inductivity of 659 backedges. 346 proven. 44 refuted. 0 times theorem prover too weak. 269 trivial. 0 not checked. [2022-01-10 00:23:47,941 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 00:23:47,941 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1719597851] [2022-01-10 00:23:47,941 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1719597851] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-10 00:23:47,941 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [97198290] [2022-01-10 00:23:47,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 00:23:47,941 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 00:23:47,941 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 00:23:47,942 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) [2022-01-10 00:23:47,943 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-01-10 00:23:48,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 00:23:48,056 INFO L263 TraceCheckSpWp]: Trace formula consists of 587 conjuncts, 5 conjunts are in the unsatisfiable core [2022-01-10 00:23:48,060 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 00:23:48,854 INFO L134 CoverageAnalysis]: Checked inductivity of 659 backedges. 417 proven. 82 refuted. 0 times theorem prover too weak. 160 trivial. 0 not checked. [2022-01-10 00:23:48,854 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 00:23:50,174 INFO L134 CoverageAnalysis]: Checked inductivity of 659 backedges. 417 proven. 82 refuted. 0 times theorem prover too weak. 160 trivial. 0 not checked. [2022-01-10 00:23:50,174 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [97198290] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 00:23:50,174 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-10 00:23:50,174 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 3, 3] total 9 [2022-01-10 00:23:50,174 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1265665165] [2022-01-10 00:23:50,174 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-10 00:23:50,176 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-01-10 00:23:50,176 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 00:23:50,177 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-01-10 00:23:50,177 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2022-01-10 00:23:50,177 INFO L87 Difference]: Start difference. First operand 83123 states and 91307 transitions. Second operand has 9 states, 9 states have (on average 82.33333333333333) internal successors, (741), 9 states have internal predecessors, (741), 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)