/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/Problem12_label15.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-a10ec3b [2022-01-10 00:04:42,703 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-10 00:04:42,705 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-10 00:04:42,749 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-01-10 00:04:42,813 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 00:04:42,845 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-10 00:04:42,845 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-10 00:04:42,845 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-01-10 00:04:42,845 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-01-10 00:04:42,846 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-01-10 00:04:42,846 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-01-10 00:04:42,847 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-01-10 00:04:42,847 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-01-10 00:04:42,847 INFO L138 SettingsManager]: * Use SBE=true [2022-01-10 00:04:42,847 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-10 00:04:42,848 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-10 00:04:42,848 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-10 00:04:42,848 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-10 00:04:42,849 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-10 00:04:42,849 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-10 00:04:42,849 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-01-10 00:04:42,849 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-10 00:04:42,849 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-10 00:04:42,849 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-10 00:04:42,849 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-10 00:04:42,849 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-10 00:04:42,850 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-10 00:04:42,850 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-10 00:04:42,850 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-01-10 00:04:42,850 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-01-10 00:04:42,850 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-01-10 00:04:42,850 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-01-10 00:04:42,850 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-01-10 00:04:42,850 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-01-10 00:04:42,851 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-01-10 00:04:42,851 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-01-10 00:04:43,058 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-10 00:04:43,088 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-10 00:04:43,090 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-10 00:04:43,091 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-10 00:04:43,092 INFO L275 PluginConnector]: CDTParser initialized [2022-01-10 00:04:43,093 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem12_label15.c [2022-01-10 00:04:43,160 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/530281779/0cc800dae12146c19251ae708d60dae8/FLAG08a9d8313 [2022-01-10 00:04:43,813 INFO L306 CDTParser]: Found 1 translation units. [2022-01-10 00:04:43,814 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem12_label15.c [2022-01-10 00:04:43,846 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/530281779/0cc800dae12146c19251ae708d60dae8/FLAG08a9d8313 [2022-01-10 00:04:44,179 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/530281779/0cc800dae12146c19251ae708d60dae8 [2022-01-10 00:04:44,181 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-10 00:04:44,182 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-01-10 00:04:44,183 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-10 00:04:44,183 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-10 00:04:44,186 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-10 00:04:44,187 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.01 12:04:44" (1/1) ... [2022-01-10 00:04:44,187 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@59fdec3b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 12:04:44, skipping insertion in model container [2022-01-10 00:04:44,188 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.01 12:04:44" (1/1) ... [2022-01-10 00:04:44,193 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-10 00:04:44,277 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-10 00:04:44,486 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/Problem12_label15.c[6730,6743] [2022-01-10 00:04:45,144 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-10 00:04:45,151 INFO L203 MainTranslator]: Completed pre-run [2022-01-10 00:04:45,180 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/Problem12_label15.c[6730,6743] [2022-01-10 00:04:45,533 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-10 00:04:45,553 INFO L208 MainTranslator]: Completed translation [2022-01-10 00:04:45,554 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 12:04:45 WrapperNode [2022-01-10 00:04:45,555 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-10 00:04:45,556 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-01-10 00:04:45,556 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-01-10 00:04:45,556 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-01-10 00:04:45,563 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 12:04:45" (1/1) ... [2022-01-10 00:04:45,602 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 12:04:45" (1/1) ... [2022-01-10 00:04:45,958 INFO L137 Inliner]: procedures = 17, calls = 11, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 4757 [2022-01-10 00:04:45,958 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-01-10 00:04:45,959 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-10 00:04:45,959 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-10 00:04:45,959 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-10 00:04:45,969 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 12:04:45" (1/1) ... [2022-01-10 00:04:45,969 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 12:04:45" (1/1) ... [2022-01-10 00:04:46,020 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 12:04:45" (1/1) ... [2022-01-10 00:04:46,020 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 12:04:45" (1/1) ... [2022-01-10 00:04:46,144 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 12:04:45" (1/1) ... [2022-01-10 00:04:46,166 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 12:04:45" (1/1) ... [2022-01-10 00:04:46,219 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 12:04:45" (1/1) ... [2022-01-10 00:04:46,324 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-10 00:04:46,326 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-10 00:04:46,326 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-10 00:04:46,326 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-10 00:04:46,327 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 12:04:45" (1/1) ... [2022-01-10 00:04:46,334 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-10 00:04:46,342 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 00:04:46,351 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 00:04:46,352 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 00:04:46,380 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-10 00:04:46,381 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-01-10 00:04:46,381 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-10 00:04:46,381 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-10 00:04:46,442 INFO L234 CfgBuilder]: Building ICFG [2022-01-10 00:04:46,443 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-10 00:04:49,541 INFO L275 CfgBuilder]: Performing block encoding [2022-01-10 00:04:49,553 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-10 00:04:49,553 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-01-10 00:04:49,556 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 12:04:49 BoogieIcfgContainer [2022-01-10 00:04:49,556 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-10 00:04:49,557 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-10 00:04:49,557 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-10 00:04:49,560 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-10 00:04:49,560 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 10.01 12:04:44" (1/3) ... [2022-01-10 00:04:49,561 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@28c60f7e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.01 12:04:49, skipping insertion in model container [2022-01-10 00:04:49,561 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 12:04:45" (2/3) ... [2022-01-10 00:04:49,562 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@28c60f7e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.01 12:04:49, skipping insertion in model container [2022-01-10 00:04:49,562 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 12:04:49" (3/3) ... [2022-01-10 00:04:49,564 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem12_label15.c [2022-01-10 00:04:49,568 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-01-10 00:04:49,568 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-10 00:04:49,622 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-10 00:04:49,629 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 00:04:49,629 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-01-10 00:04:49,660 INFO L276 IsEmpty]: Start isEmpty. Operand has 818 states, 816 states have (on average 1.9178921568627452) internal successors, (1565), 817 states have internal predecessors, (1565), 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 00:04:49,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-01-10 00:04:49,667 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 00:04:49,668 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, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 00:04:49,668 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 00:04:49,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 00:04:49,672 INFO L85 PathProgramCache]: Analyzing trace with hash 1425694346, now seen corresponding path program 1 times [2022-01-10 00:04:49,680 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 00:04:49,680 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1208286199] [2022-01-10 00:04:49,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 00:04:49,681 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 00:04:49,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 00:04:49,922 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 00:04:49,923 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 00:04:49,923 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1208286199] [2022-01-10 00:04:49,923 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1208286199] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 00:04:49,923 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 00:04:49,924 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 00:04:49,925 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [775601378] [2022-01-10 00:04:49,925 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 00:04:49,929 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-10 00:04:49,929 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 00:04:49,957 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-10 00:04:49,959 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-10 00:04:49,963 INFO L87 Difference]: Start difference. First operand has 818 states, 816 states have (on average 1.9178921568627452) internal successors, (1565), 817 states have internal predecessors, (1565), 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 4 states, 4 states have (on average 13.5) internal successors, (54), 3 states have internal predecessors, (54), 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 00:04:55,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 00:04:55,622 INFO L93 Difference]: Finished difference Result 3155 states and 6150 transitions. [2022-01-10 00:04:55,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-10 00:04:55,624 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.5) internal successors, (54), 3 states have internal predecessors, (54), 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 54 [2022-01-10 00:04:55,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 00:04:55,647 INFO L225 Difference]: With dead ends: 3155 [2022-01-10 00:04:55,647 INFO L226 Difference]: Without dead ends: 2265 [2022-01-10 00:04:55,654 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 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 00:04:55,657 INFO L933 BasicCegarLoop]: 208 mSDtfsCounter, 2383 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 3734 mSolverCounterSat, 1724 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2383 SdHoareTripleChecker+Valid, 234 SdHoareTripleChecker+Invalid, 5458 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1724 IncrementalHoareTripleChecker+Valid, 3734 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.4s IncrementalHoareTripleChecker+Time [2022-01-10 00:04:55,658 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2383 Valid, 234 Invalid, 5458 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1724 Valid, 3734 Invalid, 0 Unknown, 0 Unchecked, 5.4s Time] [2022-01-10 00:04:55,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2265 states. [2022-01-10 00:04:55,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2265 to 2257. [2022-01-10 00:04:55,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2257 states, 2256 states have (on average 1.5350177304964538) internal successors, (3463), 2256 states have internal predecessors, (3463), 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 00:04:55,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2257 states to 2257 states and 3463 transitions. [2022-01-10 00:04:55,807 INFO L78 Accepts]: Start accepts. Automaton has 2257 states and 3463 transitions. Word has length 54 [2022-01-10 00:04:55,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 00:04:55,808 INFO L470 AbstractCegarLoop]: Abstraction has 2257 states and 3463 transitions. [2022-01-10 00:04:55,808 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.5) internal successors, (54), 3 states have internal predecessors, (54), 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 00:04:55,808 INFO L276 IsEmpty]: Start isEmpty. Operand 2257 states and 3463 transitions. [2022-01-10 00:04:55,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 195 [2022-01-10 00:04:55,814 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 00:04:55,814 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, 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, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 00:04:55,814 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-01-10 00:04:55,815 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 00:04:55,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 00:04:55,816 INFO L85 PathProgramCache]: Analyzing trace with hash -653035601, now seen corresponding path program 1 times [2022-01-10 00:04:55,816 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 00:04:55,816 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2046148418] [2022-01-10 00:04:55,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 00:04:55,816 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 00:04:55,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 00:04:56,003 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 153 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-01-10 00:04:56,003 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 00:04:56,004 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2046148418] [2022-01-10 00:04:56,004 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2046148418] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 00:04:56,004 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 00:04:56,004 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 00:04:56,004 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1257329721] [2022-01-10 00:04:56,004 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 00:04:56,006 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-10 00:04:56,006 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 00:04:56,006 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-10 00:04:56,006 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-01-10 00:04:56,007 INFO L87 Difference]: Start difference. First operand 2257 states and 3463 transitions. Second operand has 4 states, 4 states have (on average 44.25) internal successors, (177), 3 states have internal predecessors, (177), 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 00:05:00,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 00:05:00,063 INFO L93 Difference]: Finished difference Result 6051 states and 9664 transitions. [2022-01-10 00:05:00,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-10 00:05:00,064 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 44.25) internal successors, (177), 3 states have internal predecessors, (177), 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 194 [2022-01-10 00:05:00,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 00:05:00,078 INFO L225 Difference]: With dead ends: 6051 [2022-01-10 00:05:00,078 INFO L226 Difference]: Without dead ends: 3759 [2022-01-10 00:05:00,083 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 00:05:00,084 INFO L933 BasicCegarLoop]: 694 mSDtfsCounter, 704 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 3107 mSolverCounterSat, 729 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 704 SdHoareTripleChecker+Valid, 708 SdHoareTripleChecker+Invalid, 3836 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 729 IncrementalHoareTripleChecker+Valid, 3107 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.9s IncrementalHoareTripleChecker+Time [2022-01-10 00:05:00,085 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [704 Valid, 708 Invalid, 3836 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [729 Valid, 3107 Invalid, 0 Unknown, 0 Unchecked, 3.9s Time] [2022-01-10 00:05:00,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3759 states. [2022-01-10 00:05:00,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3759 to 3759. [2022-01-10 00:05:00,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3759 states, 3758 states have (on average 1.3408728046833422) internal successors, (5039), 3758 states have internal predecessors, (5039), 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 00:05:00,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3759 states to 3759 states and 5039 transitions. [2022-01-10 00:05:00,161 INFO L78 Accepts]: Start accepts. Automaton has 3759 states and 5039 transitions. Word has length 194 [2022-01-10 00:05:00,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 00:05:00,164 INFO L470 AbstractCegarLoop]: Abstraction has 3759 states and 5039 transitions. [2022-01-10 00:05:00,164 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 44.25) internal successors, (177), 3 states have internal predecessors, (177), 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 00:05:00,164 INFO L276 IsEmpty]: Start isEmpty. Operand 3759 states and 5039 transitions. [2022-01-10 00:05:00,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 265 [2022-01-10 00:05:00,172 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 00:05:00,173 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, 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, 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, 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 00:05:00,173 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-01-10 00:05:00,173 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 00:05:00,174 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 00:05:00,174 INFO L85 PathProgramCache]: Analyzing trace with hash 1501609534, now seen corresponding path program 1 times [2022-01-10 00:05:00,174 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 00:05:00,174 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [971607143] [2022-01-10 00:05:00,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 00:05:00,175 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 00:05:00,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 00:05:00,396 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 103 proven. 0 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2022-01-10 00:05:00,396 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 00:05:00,396 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [971607143] [2022-01-10 00:05:00,396 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [971607143] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 00:05:00,397 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 00:05:00,397 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-01-10 00:05:00,397 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [945031496] [2022-01-10 00:05:00,397 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 00:05:00,398 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 00:05:00,398 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 00:05:00,398 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 00:05:00,398 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 00:05:00,399 INFO L87 Difference]: Start difference. First operand 3759 states and 5039 transitions. Second operand has 3 states, 3 states have (on average 65.66666666666667) internal successors, (197), 2 states have internal predecessors, (197), 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 00:05:02,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 00:05:02,948 INFO L93 Difference]: Finished difference Result 10520 states and 14356 transitions. [2022-01-10 00:05:02,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 00:05:02,949 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 65.66666666666667) internal successors, (197), 2 states have internal predecessors, (197), 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 264 [2022-01-10 00:05:02,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 00:05:02,972 INFO L225 Difference]: With dead ends: 10520 [2022-01-10 00:05:02,972 INFO L226 Difference]: Without dead ends: 6763 [2022-01-10 00:05:02,978 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 00:05:02,979 INFO L933 BasicCegarLoop]: 480 mSDtfsCounter, 669 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 1989 mSolverCounterSat, 845 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 669 SdHoareTripleChecker+Valid, 486 SdHoareTripleChecker+Invalid, 2834 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 845 IncrementalHoareTripleChecker+Valid, 1989 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2022-01-10 00:05:02,979 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [669 Valid, 486 Invalid, 2834 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [845 Valid, 1989 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2022-01-10 00:05:02,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6763 states. [2022-01-10 00:05:03,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6763 to 6012. [2022-01-10 00:05:03,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6012 states, 6011 states have (on average 1.2814839460988188) internal successors, (7703), 6011 states have internal predecessors, (7703), 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 00:05:03,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6012 states to 6012 states and 7703 transitions. [2022-01-10 00:05:03,081 INFO L78 Accepts]: Start accepts. Automaton has 6012 states and 7703 transitions. Word has length 264 [2022-01-10 00:05:03,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 00:05:03,082 INFO L470 AbstractCegarLoop]: Abstraction has 6012 states and 7703 transitions. [2022-01-10 00:05:03,082 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 65.66666666666667) internal successors, (197), 2 states have internal predecessors, (197), 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 00:05:03,082 INFO L276 IsEmpty]: Start isEmpty. Operand 6012 states and 7703 transitions. [2022-01-10 00:05:03,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 278 [2022-01-10 00:05:03,085 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 00:05:03,085 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, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 00:05:03,085 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-01-10 00:05:03,086 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 00:05:03,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 00:05:03,086 INFO L85 PathProgramCache]: Analyzing trace with hash -436238599, now seen corresponding path program 1 times [2022-01-10 00:05:03,086 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 00:05:03,087 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [731689601] [2022-01-10 00:05:03,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 00:05:03,087 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 00:05:03,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 00:05:03,219 INFO L134 CoverageAnalysis]: Checked inductivity of 184 backedges. 103 proven. 54 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-01-10 00:05:03,220 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 00:05:03,220 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [731689601] [2022-01-10 00:05:03,220 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [731689601] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-10 00:05:03,220 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1988566510] [2022-01-10 00:05:03,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 00:05:03,221 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 00:05:03,221 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 00:05:03,227 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 00:05:03,263 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 00:05:03,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 00:05:03,350 INFO L263 TraceCheckSpWp]: Trace formula consists of 392 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-10 00:05:03,367 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 00:05:03,825 INFO L134 CoverageAnalysis]: Checked inductivity of 184 backedges. 184 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 00:05:03,825 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 00:05:03,826 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1988566510] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 00:05:03,826 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-01-10 00:05:03,826 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2022-01-10 00:05:03,827 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [187687552] [2022-01-10 00:05:03,827 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 00:05:03,827 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 00:05:03,827 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 00:05:03,828 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 00:05:03,830 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-01-10 00:05:03,830 INFO L87 Difference]: Start difference. First operand 6012 states and 7703 transitions. Second operand has 3 states, 3 states have (on average 92.33333333333333) internal successors, (277), 3 states have internal predecessors, (277), 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 00:05:06,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 00:05:06,276 INFO L93 Difference]: Finished difference Result 15026 states and 19934 transitions. [2022-01-10 00:05:06,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 00:05:06,276 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 92.33333333333333) internal successors, (277), 3 states have internal predecessors, (277), 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 277 [2022-01-10 00:05:06,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 00:05:06,306 INFO L225 Difference]: With dead ends: 15026 [2022-01-10 00:05:06,307 INFO L226 Difference]: Without dead ends: 9016 [2022-01-10 00:05:06,315 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 279 GetRequests, 276 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-01-10 00:05:06,316 INFO L933 BasicCegarLoop]: 303 mSDtfsCounter, 908 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 2072 mSolverCounterSat, 703 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 908 SdHoareTripleChecker+Valid, 309 SdHoareTripleChecker+Invalid, 2775 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 703 IncrementalHoareTripleChecker+Valid, 2072 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2022-01-10 00:05:06,317 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [908 Valid, 309 Invalid, 2775 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [703 Valid, 2072 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2022-01-10 00:05:06,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9016 states. [2022-01-10 00:05:06,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9016 to 9016. [2022-01-10 00:05:06,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9016 states, 9015 states have (on average 1.2657792567942319) internal successors, (11411), 9015 states have internal predecessors, (11411), 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 00:05:06,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9016 states to 9016 states and 11411 transitions. [2022-01-10 00:05:06,471 INFO L78 Accepts]: Start accepts. Automaton has 9016 states and 11411 transitions. Word has length 277 [2022-01-10 00:05:06,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 00:05:06,472 INFO L470 AbstractCegarLoop]: Abstraction has 9016 states and 11411 transitions. [2022-01-10 00:05:06,472 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 92.33333333333333) internal successors, (277), 3 states have internal predecessors, (277), 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 00:05:06,472 INFO L276 IsEmpty]: Start isEmpty. Operand 9016 states and 11411 transitions. [2022-01-10 00:05:06,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 295 [2022-01-10 00:05:06,475 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 00:05:06,476 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, 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, 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, 1] [2022-01-10 00:05:06,500 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 00:05:06,695 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 00:05:06,696 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 00:05:06,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 00:05:06,696 INFO L85 PathProgramCache]: Analyzing trace with hash -829867597, now seen corresponding path program 1 times [2022-01-10 00:05:06,696 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 00:05:06,696 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1917005511] [2022-01-10 00:05:06,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 00:05:06,697 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 00:05:06,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 00:05:06,834 INFO L134 CoverageAnalysis]: Checked inductivity of 201 backedges. 103 proven. 0 refuted. 0 times theorem prover too weak. 98 trivial. 0 not checked. [2022-01-10 00:05:06,835 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 00:05:06,835 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1917005511] [2022-01-10 00:05:06,835 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1917005511] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 00:05:06,835 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 00:05:06,835 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 00:05:06,835 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1956114209] [2022-01-10 00:05:06,835 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 00:05:06,836 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 00:05:06,836 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 00:05:06,836 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 00:05:06,838 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 00:05:06,839 INFO L87 Difference]: Start difference. First operand 9016 states and 11411 transitions. Second operand has 3 states, 3 states have (on average 65.66666666666667) internal successors, (197), 3 states have internal predecessors, (197), 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 00:05:09,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 00:05:09,739 INFO L93 Difference]: Finished difference Result 25540 states and 32713 transitions. [2022-01-10 00:05:09,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 00:05:09,740 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 65.66666666666667) internal successors, (197), 3 states have internal predecessors, (197), 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 294 [2022-01-10 00:05:09,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 00:05:09,784 INFO L225 Difference]: With dead ends: 25540 [2022-01-10 00:05:09,784 INFO L226 Difference]: Without dead ends: 16526 [2022-01-10 00:05:09,796 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 00:05:09,797 INFO L933 BasicCegarLoop]: 1317 mSDtfsCounter, 704 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 2686 mSolverCounterSat, 373 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 704 SdHoareTripleChecker+Valid, 1325 SdHoareTripleChecker+Invalid, 3059 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 373 IncrementalHoareTripleChecker+Valid, 2686 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2022-01-10 00:05:09,797 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [704 Valid, 1325 Invalid, 3059 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [373 Valid, 2686 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2022-01-10 00:05:09,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16526 states. [2022-01-10 00:05:10,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16526 to 15775. [2022-01-10 00:05:10,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15775 states, 15774 states have (on average 1.2523773297831875) internal successors, (19755), 15774 states have internal predecessors, (19755), 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 00:05:10,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15775 states to 15775 states and 19755 transitions. [2022-01-10 00:05:10,059 INFO L78 Accepts]: Start accepts. Automaton has 15775 states and 19755 transitions. Word has length 294 [2022-01-10 00:05:10,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 00:05:10,060 INFO L470 AbstractCegarLoop]: Abstraction has 15775 states and 19755 transitions. [2022-01-10 00:05:10,060 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 65.66666666666667) internal successors, (197), 3 states have internal predecessors, (197), 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 00:05:10,061 INFO L276 IsEmpty]: Start isEmpty. Operand 15775 states and 19755 transitions. [2022-01-10 00:05:10,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 344 [2022-01-10 00:05:10,065 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 00:05:10,066 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, 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, 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, 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 00:05:10,066 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-01-10 00:05:10,066 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 00:05:10,066 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 00:05:10,067 INFO L85 PathProgramCache]: Analyzing trace with hash 1769336259, now seen corresponding path program 1 times [2022-01-10 00:05:10,067 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 00:05:10,067 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1416590411] [2022-01-10 00:05:10,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 00:05:10,067 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 00:05:10,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 00:05:10,270 INFO L134 CoverageAnalysis]: Checked inductivity of 370 backedges. 292 proven. 0 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2022-01-10 00:05:10,270 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 00:05:10,271 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1416590411] [2022-01-10 00:05:10,271 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1416590411] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 00:05:10,271 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 00:05:10,271 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 00:05:10,271 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1799474503] [2022-01-10 00:05:10,271 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 00:05:10,272 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 00:05:10,272 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 00:05:10,272 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 00:05:10,272 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 00:05:10,273 INFO L87 Difference]: Start difference. First operand 15775 states and 19755 transitions. Second operand has 3 states, 3 states have (on average 88.66666666666667) internal successors, (266), 3 states have internal predecessors, (266), 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 00:05:12,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 00:05:12,882 INFO L93 Difference]: Finished difference Result 38307 states and 48288 transitions. [2022-01-10 00:05:12,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 00:05:12,883 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 88.66666666666667) internal successors, (266), 3 states have internal predecessors, (266), 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 343 [2022-01-10 00:05:12,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 00:05:12,921 INFO L225 Difference]: With dead ends: 38307 [2022-01-10 00:05:12,921 INFO L226 Difference]: Without dead ends: 22534 [2022-01-10 00:05:12,933 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 7 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 00:05:12,934 INFO L933 BasicCegarLoop]: 136 mSDtfsCounter, 829 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 2037 mSolverCounterSat, 1009 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 829 SdHoareTripleChecker+Valid, 142 SdHoareTripleChecker+Invalid, 3046 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1009 IncrementalHoareTripleChecker+Valid, 2037 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2022-01-10 00:05:12,934 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [829 Valid, 142 Invalid, 3046 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1009 Valid, 2037 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2022-01-10 00:05:12,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22534 states. [2022-01-10 00:05:13,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22534 to 22534. [2022-01-10 00:05:13,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22534 states, 22533 states have (on average 1.2340567168153376) internal successors, (27807), 22533 states have internal predecessors, (27807), 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 00:05:13,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22534 states to 22534 states and 27807 transitions. [2022-01-10 00:05:13,198 INFO L78 Accepts]: Start accepts. Automaton has 22534 states and 27807 transitions. Word has length 343 [2022-01-10 00:05:13,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 00:05:13,199 INFO L470 AbstractCegarLoop]: Abstraction has 22534 states and 27807 transitions. [2022-01-10 00:05:13,199 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 88.66666666666667) internal successors, (266), 3 states have internal predecessors, (266), 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 00:05:13,199 INFO L276 IsEmpty]: Start isEmpty. Operand 22534 states and 27807 transitions. [2022-01-10 00:05:13,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 349 [2022-01-10 00:05:13,204 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 00:05:13,204 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, 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, 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, 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 00:05:13,204 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-01-10 00:05:13,205 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 00:05:13,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 00:05:13,205 INFO L85 PathProgramCache]: Analyzing trace with hash 1851360552, now seen corresponding path program 1 times [2022-01-10 00:05:13,205 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 00:05:13,205 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [556789344] [2022-01-10 00:05:13,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 00:05:13,206 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 00:05:13,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 00:05:13,312 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 302 proven. 0 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2022-01-10 00:05:13,312 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 00:05:13,313 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [556789344] [2022-01-10 00:05:13,313 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [556789344] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 00:05:13,313 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 00:05:13,313 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 00:05:13,313 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1182385644] [2022-01-10 00:05:13,313 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 00:05:13,314 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 00:05:13,314 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 00:05:13,314 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 00:05:13,314 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 00:05:13,315 INFO L87 Difference]: Start difference. First operand 22534 states and 27807 transitions. Second operand has 3 states, 3 states have (on average 90.33333333333333) internal successors, (271), 3 states have internal predecessors, (271), 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 00:05:15,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 00:05:15,829 INFO L93 Difference]: Finished difference Result 45066 states and 55612 transitions. [2022-01-10 00:05:15,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 00:05:15,830 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 90.33333333333333) internal successors, (271), 3 states have internal predecessors, (271), 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 348 [2022-01-10 00:05:15,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 00:05:15,860 INFO L225 Difference]: With dead ends: 45066 [2022-01-10 00:05:15,860 INFO L226 Difference]: Without dead ends: 22534 [2022-01-10 00:05:15,875 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 00:05:15,876 INFO L933 BasicCegarLoop]: 181 mSDtfsCounter, 737 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 2264 mSolverCounterSat, 681 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 737 SdHoareTripleChecker+Valid, 187 SdHoareTripleChecker+Invalid, 2945 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 681 IncrementalHoareTripleChecker+Valid, 2264 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-01-10 00:05:15,876 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [737 Valid, 187 Invalid, 2945 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [681 Valid, 2264 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2022-01-10 00:05:15,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22534 states. [2022-01-10 00:05:16,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22534 to 22534. [2022-01-10 00:05:16,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22534 states, 22533 states have (on average 1.2210091865264279) internal successors, (27513), 22533 states have internal predecessors, (27513), 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 00:05:16,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22534 states to 22534 states and 27513 transitions. [2022-01-10 00:05:16,124 INFO L78 Accepts]: Start accepts. Automaton has 22534 states and 27513 transitions. Word has length 348 [2022-01-10 00:05:16,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 00:05:16,124 INFO L470 AbstractCegarLoop]: Abstraction has 22534 states and 27513 transitions. [2022-01-10 00:05:16,125 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 90.33333333333333) internal successors, (271), 3 states have internal predecessors, (271), 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 00:05:16,125 INFO L276 IsEmpty]: Start isEmpty. Operand 22534 states and 27513 transitions. [2022-01-10 00:05:16,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 360 [2022-01-10 00:05:16,128 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 00:05:16,128 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, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 00:05:16,128 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-01-10 00:05:16,129 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 00:05:16,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 00:05:16,129 INFO L85 PathProgramCache]: Analyzing trace with hash -14553240, now seen corresponding path program 1 times [2022-01-10 00:05:16,129 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 00:05:16,129 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1366201473] [2022-01-10 00:05:16,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 00:05:16,129 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 00:05:16,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 00:05:16,244 INFO L134 CoverageAnalysis]: Checked inductivity of 387 backedges. 302 proven. 0 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2022-01-10 00:05:16,244 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 00:05:16,244 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1366201473] [2022-01-10 00:05:16,245 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1366201473] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 00:05:16,245 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 00:05:16,245 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 00:05:16,245 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [808042599] [2022-01-10 00:05:16,245 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 00:05:16,246 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 00:05:16,246 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 00:05:16,246 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 00:05:16,246 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 00:05:16,247 INFO L87 Difference]: Start difference. First operand 22534 states and 27513 transitions. Second operand has 3 states, 3 states have (on average 91.66666666666667) internal successors, (275), 3 states have internal predecessors, (275), 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 00:05:18,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 00:05:18,945 INFO L93 Difference]: Finished difference Result 60837 states and 75395 transitions. [2022-01-10 00:05:18,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 00:05:18,945 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 91.66666666666667) internal successors, (275), 3 states have internal predecessors, (275), 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 359 [2022-01-10 00:05:18,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 00:05:19,000 INFO L225 Difference]: With dead ends: 60837 [2022-01-10 00:05:19,000 INFO L226 Difference]: Without dead ends: 38305 [2022-01-10 00:05:19,015 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 00:05:19,016 INFO L933 BasicCegarLoop]: 418 mSDtfsCounter, 722 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 2243 mSolverCounterSat, 691 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 722 SdHoareTripleChecker+Valid, 424 SdHoareTripleChecker+Invalid, 2934 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 691 IncrementalHoareTripleChecker+Valid, 2243 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2022-01-10 00:05:19,016 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [722 Valid, 424 Invalid, 2934 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [691 Valid, 2243 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2022-01-10 00:05:19,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38305 states. [2022-01-10 00:05:19,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38305 to 38305. [2022-01-10 00:05:19,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38305 states, 38304 states have (on average 1.2043650793650793) internal successors, (46132), 38304 states have internal predecessors, (46132), 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 00:05:19,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38305 states to 38305 states and 46132 transitions. [2022-01-10 00:05:19,421 INFO L78 Accepts]: Start accepts. Automaton has 38305 states and 46132 transitions. Word has length 359 [2022-01-10 00:05:19,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 00:05:19,424 INFO L470 AbstractCegarLoop]: Abstraction has 38305 states and 46132 transitions. [2022-01-10 00:05:19,424 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 91.66666666666667) internal successors, (275), 3 states have internal predecessors, (275), 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 00:05:19,424 INFO L276 IsEmpty]: Start isEmpty. Operand 38305 states and 46132 transitions. [2022-01-10 00:05:19,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 386 [2022-01-10 00:05:19,429 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 00:05:19,429 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, 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, 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, 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] [2022-01-10 00:05:19,429 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-01-10 00:05:19,429 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 00:05:19,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 00:05:19,430 INFO L85 PathProgramCache]: Analyzing trace with hash 1763235576, now seen corresponding path program 1 times [2022-01-10 00:05:19,430 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 00:05:19,430 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [480734218] [2022-01-10 00:05:19,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 00:05:19,430 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 00:05:19,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 00:05:19,603 INFO L134 CoverageAnalysis]: Checked inductivity of 408 backedges. 339 proven. 69 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 00:05:19,604 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 00:05:19,604 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [480734218] [2022-01-10 00:05:19,604 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [480734218] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-10 00:05:19,604 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [948984620] [2022-01-10 00:05:19,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 00:05:19,604 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 00:05:19,607 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 00:05:19,608 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 00:05:19,610 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 00:05:19,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 00:05:19,733 INFO L263 TraceCheckSpWp]: Trace formula consists of 528 conjuncts, 3 conjunts are in the unsatisfiable core [2022-01-10 00:05:19,744 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 00:05:21,160 INFO L134 CoverageAnalysis]: Checked inductivity of 408 backedges. 155 proven. 0 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked. [2022-01-10 00:05:21,161 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 00:05:21,161 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [948984620] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 00:05:21,161 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-01-10 00:05:21,161 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 7 [2022-01-10 00:05:21,161 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1735395220] [2022-01-10 00:05:21,161 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 00:05:21,162 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-10 00:05:21,162 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 00:05:21,162 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-10 00:05:21,162 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-01-10 00:05:21,163 INFO L87 Difference]: Start difference. First operand 38305 states and 46132 transitions. Second operand has 4 states, 4 states have (on average 50.5) internal successors, (202), 3 states have internal predecessors, (202), 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 00:05:24,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 00:05:24,233 INFO L93 Difference]: Finished difference Result 83369 states and 99369 transitions. [2022-01-10 00:05:24,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-10 00:05:24,234 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 50.5) internal successors, (202), 3 states have internal predecessors, (202), 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 385 [2022-01-10 00:05:24,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 00:05:24,341 INFO L225 Difference]: With dead ends: 83369 [2022-01-10 00:05:24,342 INFO L226 Difference]: Without dead ends: 83367 [2022-01-10 00:05:24,370 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 389 GetRequests, 384 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-01-10 00:05:24,371 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 1904 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 2380 mSolverCounterSat, 280 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1904 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 6454 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 280 IncrementalHoareTripleChecker+Valid, 2380 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 3794 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2022-01-10 00:05:24,371 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1904 Valid, 30 Invalid, 6454 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [280 Valid, 2380 Invalid, 0 Unknown, 3794 Unchecked, 2.7s Time] [2022-01-10 00:05:24,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83367 states. [2022-01-10 00:05:25,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83367 to 82614. [2022-01-10 00:05:25,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82614 states, 82613 states have (on average 1.1933351893769746) internal successors, (98585), 82613 states have internal predecessors, (98585), 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 00:05:25,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82614 states to 82614 states and 98585 transitions. [2022-01-10 00:05:25,407 INFO L78 Accepts]: Start accepts. Automaton has 82614 states and 98585 transitions. Word has length 385 [2022-01-10 00:05:25,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 00:05:25,408 INFO L470 AbstractCegarLoop]: Abstraction has 82614 states and 98585 transitions. [2022-01-10 00:05:25,408 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 50.5) internal successors, (202), 3 states have internal predecessors, (202), 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 00:05:25,408 INFO L276 IsEmpty]: Start isEmpty. Operand 82614 states and 98585 transitions. [2022-01-10 00:05:25,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 387 [2022-01-10 00:05:25,413 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 00:05:25,413 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, 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, 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, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 00:05:25,437 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 00:05:25,623 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,SelfDestructingSolverStorable8 [2022-01-10 00:05:25,624 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 00:05:25,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 00:05:25,624 INFO L85 PathProgramCache]: Analyzing trace with hash -1465652963, now seen corresponding path program 1 times [2022-01-10 00:05:25,624 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 00:05:25,625 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1693813576] [2022-01-10 00:05:25,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 00:05:25,625 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 00:05:25,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 00:05:26,071 INFO L134 CoverageAnalysis]: Checked inductivity of 414 backedges. 250 proven. 0 refuted. 0 times theorem prover too weak. 164 trivial. 0 not checked. [2022-01-10 00:05:26,071 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 00:05:26,071 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1693813576] [2022-01-10 00:05:26,071 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1693813576] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 00:05:26,071 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 00:05:26,072 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 00:05:26,072 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1059606487] [2022-01-10 00:05:26,072 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 00:05:26,072 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 00:05:26,072 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 00:05:26,073 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 00:05:26,073 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 00:05:26,073 INFO L87 Difference]: Start difference. First operand 82614 states and 98585 transitions. Second operand has 3 states, 3 states have (on average 74.66666666666667) internal successors, (224), 3 states have internal predecessors, (224), 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 00:05:29,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 00:05:29,355 INFO L93 Difference]: Finished difference Result 193764 states and 232973 transitions. [2022-01-10 00:05:29,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 00:05:29,355 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 74.66666666666667) internal successors, (224), 3 states have internal predecessors, (224), 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 386 [2022-01-10 00:05:29,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 00:05:29,504 INFO L225 Difference]: With dead ends: 193764 [2022-01-10 00:05:29,504 INFO L226 Difference]: Without dead ends: 111903 [2022-01-10 00:05:29,538 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 00:05:29,539 INFO L933 BasicCegarLoop]: 1260 mSDtfsCounter, 693 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 2314 mSolverCounterSat, 522 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 693 SdHoareTripleChecker+Valid, 1268 SdHoareTripleChecker+Invalid, 2836 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 522 IncrementalHoareTripleChecker+Valid, 2314 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2022-01-10 00:05:29,540 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [693 Valid, 1268 Invalid, 2836 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [522 Valid, 2314 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2022-01-10 00:05:29,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111903 states. [2022-01-10 00:05:30,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111903 to 111152. [2022-01-10 00:05:30,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111152 states, 111151 states have (on average 1.1645419294473285) internal successors, (129440), 111151 states have internal predecessors, (129440), 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 00:05:31,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111152 states to 111152 states and 129440 transitions. [2022-01-10 00:05:31,309 INFO L78 Accepts]: Start accepts. Automaton has 111152 states and 129440 transitions. Word has length 386 [2022-01-10 00:05:31,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 00:05:31,310 INFO L470 AbstractCegarLoop]: Abstraction has 111152 states and 129440 transitions. [2022-01-10 00:05:31,310 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 74.66666666666667) internal successors, (224), 3 states have internal predecessors, (224), 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 00:05:31,310 INFO L276 IsEmpty]: Start isEmpty. Operand 111152 states and 129440 transitions. [2022-01-10 00:05:31,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 439 [2022-01-10 00:05:31,323 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 00:05:31,323 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, 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, 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, 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 00:05:31,324 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-01-10 00:05:31,324 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 00:05:31,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 00:05:31,325 INFO L85 PathProgramCache]: Analyzing trace with hash -352558693, now seen corresponding path program 1 times [2022-01-10 00:05:31,325 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 00:05:31,325 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [419622725] [2022-01-10 00:05:31,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 00:05:31,325 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 00:05:31,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 00:05:31,708 INFO L134 CoverageAnalysis]: Checked inductivity of 509 backedges. 393 proven. 0 refuted. 0 times theorem prover too weak. 116 trivial. 0 not checked. [2022-01-10 00:05:31,708 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 00:05:31,708 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [419622725] [2022-01-10 00:05:31,708 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [419622725] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 00:05:31,708 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 00:05:31,709 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 00:05:31,709 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1258680512] [2022-01-10 00:05:31,709 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 00:05:31,709 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 00:05:31,710 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 00:05:31,711 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 00:05:31,712 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 00:05:31,712 INFO L87 Difference]: Start difference. First operand 111152 states and 129440 transitions. Second operand has 3 states, 3 states have (on average 107.66666666666667) internal successors, (323), 3 states have internal predecessors, (323), 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 00:05:35,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 00:05:35,031 INFO L93 Difference]: Finished difference Result 260603 states and 302428 transitions. [2022-01-10 00:05:35,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 00:05:35,032 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 107.66666666666667) internal successors, (323), 3 states have internal predecessors, (323), 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 438 [2022-01-10 00:05:35,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 00:05:35,363 INFO L225 Difference]: With dead ends: 260603 [2022-01-10 00:05:35,363 INFO L226 Difference]: Without dead ends: 150204 [2022-01-10 00:05:35,403 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 00:05:35,411 INFO L933 BasicCegarLoop]: 1302 mSDtfsCounter, 686 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 2163 mSolverCounterSat, 514 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 686 SdHoareTripleChecker+Valid, 1310 SdHoareTripleChecker+Invalid, 2677 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 514 IncrementalHoareTripleChecker+Valid, 2163 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2022-01-10 00:05:35,411 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [686 Valid, 1310 Invalid, 2677 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [514 Valid, 2163 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2022-01-10 00:05:35,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150204 states.