/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/Problem15_label04.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-a10ec3b [2022-01-10 00:15:31,083 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-10 00:15:31,085 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-10 00:15:31,126 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-01-10 00:15:31,174 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 00:15:31,197 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-10 00:15:31,198 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-10 00:15:31,198 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-01-10 00:15:31,198 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-01-10 00:15:31,199 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-01-10 00:15:31,199 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-01-10 00:15:31,199 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-01-10 00:15:31,199 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-01-10 00:15:31,199 INFO L138 SettingsManager]: * Use SBE=true [2022-01-10 00:15:31,200 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-10 00:15:31,200 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-10 00:15:31,200 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-10 00:15:31,200 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-10 00:15:31,201 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-10 00:15:31,201 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-10 00:15:31,201 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-01-10 00:15:31,201 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-10 00:15:31,201 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-10 00:15:31,201 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-10 00:15:31,201 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-10 00:15:31,201 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-10 00:15:31,201 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-10 00:15:31,201 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-10 00:15:31,202 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-01-10 00:15:31,202 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-01-10 00:15:31,203 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-01-10 00:15:31,203 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-01-10 00:15:31,203 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-01-10 00:15:31,203 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-01-10 00:15:31,203 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-01-10 00:15:31,203 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-01-10 00:15:31,360 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-10 00:15:31,389 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-10 00:15:31,391 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-10 00:15:31,392 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-10 00:15:31,394 INFO L275 PluginConnector]: CDTParser initialized [2022-01-10 00:15:31,394 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem15_label04.c [2022-01-10 00:15:31,447 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/71a01a94d/f9fcbe44b6494e1283d9a028a6f3b71e/FLAGb3c5716d8 [2022-01-10 00:15:31,979 INFO L306 CDTParser]: Found 1 translation units. [2022-01-10 00:15:31,980 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem15_label04.c [2022-01-10 00:15:31,996 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/71a01a94d/f9fcbe44b6494e1283d9a028a6f3b71e/FLAGb3c5716d8 [2022-01-10 00:15:32,215 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/71a01a94d/f9fcbe44b6494e1283d9a028a6f3b71e [2022-01-10 00:15:32,217 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-10 00:15:32,220 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-01-10 00:15:32,227 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-10 00:15:32,228 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-10 00:15:32,230 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-10 00:15:32,231 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.01 12:15:32" (1/1) ... [2022-01-10 00:15:32,231 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1de8b0ba and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 12:15:32, skipping insertion in model container [2022-01-10 00:15:32,231 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.01 12:15:32" (1/1) ... [2022-01-10 00:15:32,235 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-10 00:15:32,283 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-10 00:15:32,492 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/Problem15_label04.c[3915,3928] [2022-01-10 00:15:32,765 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-10 00:15:32,771 INFO L203 MainTranslator]: Completed pre-run [2022-01-10 00:15:32,791 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/Problem15_label04.c[3915,3928] [2022-01-10 00:15:32,964 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-10 00:15:32,978 INFO L208 MainTranslator]: Completed translation [2022-01-10 00:15:32,979 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 12:15:32 WrapperNode [2022-01-10 00:15:32,980 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-10 00:15:32,981 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-01-10 00:15:32,981 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-01-10 00:15:32,981 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-01-10 00:15:32,986 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 12:15:32" (1/1) ... [2022-01-10 00:15:33,019 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 12:15:32" (1/1) ... [2022-01-10 00:15:33,128 INFO L137 Inliner]: procedures = 15, calls = 9, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 1758 [2022-01-10 00:15:33,129 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-01-10 00:15:33,129 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-10 00:15:33,130 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-10 00:15:33,130 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-10 00:15:33,136 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 12:15:32" (1/1) ... [2022-01-10 00:15:33,136 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 12:15:32" (1/1) ... [2022-01-10 00:15:33,163 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 12:15:32" (1/1) ... [2022-01-10 00:15:33,163 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 12:15:32" (1/1) ... [2022-01-10 00:15:33,223 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 12:15:32" (1/1) ... [2022-01-10 00:15:33,241 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 12:15:32" (1/1) ... [2022-01-10 00:15:33,262 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 12:15:32" (1/1) ... [2022-01-10 00:15:33,288 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-10 00:15:33,289 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-10 00:15:33,289 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-10 00:15:33,289 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-10 00:15:33,290 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 12:15:32" (1/1) ... [2022-01-10 00:15:33,295 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-10 00:15:33,303 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 00:15:33,328 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 00:15:33,391 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 00:15:33,417 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-10 00:15:33,417 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-01-10 00:15:33,417 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-10 00:15:33,417 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-10 00:15:33,507 INFO L234 CfgBuilder]: Building ICFG [2022-01-10 00:15:33,508 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-10 00:15:35,125 INFO L275 CfgBuilder]: Performing block encoding [2022-01-10 00:15:35,133 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-10 00:15:35,133 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-01-10 00:15:35,135 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 12:15:35 BoogieIcfgContainer [2022-01-10 00:15:35,135 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-10 00:15:35,136 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-10 00:15:35,136 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-10 00:15:35,141 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-10 00:15:35,141 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 10.01 12:15:32" (1/3) ... [2022-01-10 00:15:35,142 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@36d9e65 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.01 12:15:35, skipping insertion in model container [2022-01-10 00:15:35,142 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 12:15:32" (2/3) ... [2022-01-10 00:15:35,142 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@36d9e65 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.01 12:15:35, skipping insertion in model container [2022-01-10 00:15:35,142 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 12:15:35" (3/3) ... [2022-01-10 00:15:35,144 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem15_label04.c [2022-01-10 00:15:35,147 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-01-10 00:15:35,147 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-10 00:15:35,186 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-10 00:15:35,192 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 00:15:35,192 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-01-10 00:15:35,212 INFO L276 IsEmpty]: Start isEmpty. Operand has 424 states, 422 states have (on average 1.7772511848341233) internal successors, (750), 423 states have internal predecessors, (750), 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 00:15:35,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-01-10 00:15:35,217 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 00:15:35,218 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] [2022-01-10 00:15:35,218 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 00:15:35,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 00:15:35,222 INFO L85 PathProgramCache]: Analyzing trace with hash -1843609039, now seen corresponding path program 1 times [2022-01-10 00:15:35,227 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 00:15:35,227 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1955560921] [2022-01-10 00:15:35,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 00:15:35,228 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 00:15:35,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 00:15:35,404 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 00:15:35,405 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 00:15:35,405 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1955560921] [2022-01-10 00:15:35,406 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1955560921] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 00:15:35,406 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 00:15:35,406 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-01-10 00:15:35,407 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1955745533] [2022-01-10 00:15:35,407 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 00:15:35,410 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 00:15:35,410 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 00:15:35,433 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 00:15:35,434 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 00:15:35,437 INFO L87 Difference]: Start difference. First operand has 424 states, 422 states have (on average 1.7772511848341233) internal successors, (750), 423 states have internal predecessors, (750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 10.333333333333334) internal successors, (31), 2 states have internal predecessors, (31), 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 00:15:36,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 00:15:36,897 INFO L93 Difference]: Finished difference Result 1155 states and 2106 transitions. [2022-01-10 00:15:36,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 00:15:36,899 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 10.333333333333334) internal successors, (31), 2 states have internal predecessors, (31), 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 31 [2022-01-10 00:15:36,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 00:15:36,909 INFO L225 Difference]: With dead ends: 1155 [2022-01-10 00:15:36,909 INFO L226 Difference]: Without dead ends: 667 [2022-01-10 00:15:36,912 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 00:15:36,914 INFO L933 BasicCegarLoop]: 329 mSDtfsCounter, 313 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 899 mSolverCounterSat, 345 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 313 SdHoareTripleChecker+Valid, 371 SdHoareTripleChecker+Invalid, 1244 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 345 IncrementalHoareTripleChecker+Valid, 899 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-01-10 00:15:36,914 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [313 Valid, 371 Invalid, 1244 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [345 Valid, 899 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-01-10 00:15:36,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 667 states. [2022-01-10 00:15:36,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 667 to 665. [2022-01-10 00:15:36,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 665 states, 664 states have (on average 1.4789156626506024) internal successors, (982), 664 states have internal predecessors, (982), 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 00:15:36,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 665 states to 665 states and 982 transitions. [2022-01-10 00:15:36,958 INFO L78 Accepts]: Start accepts. Automaton has 665 states and 982 transitions. Word has length 31 [2022-01-10 00:15:36,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 00:15:36,958 INFO L470 AbstractCegarLoop]: Abstraction has 665 states and 982 transitions. [2022-01-10 00:15:36,958 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.333333333333334) internal successors, (31), 2 states have internal predecessors, (31), 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 00:15:36,958 INFO L276 IsEmpty]: Start isEmpty. Operand 665 states and 982 transitions. [2022-01-10 00:15:36,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2022-01-10 00:15:36,960 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 00:15:36,960 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 00:15:36,960 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-01-10 00:15:36,961 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 00:15:36,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 00:15:36,961 INFO L85 PathProgramCache]: Analyzing trace with hash -2056552649, now seen corresponding path program 1 times [2022-01-10 00:15:36,961 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 00:15:36,961 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [814569656] [2022-01-10 00:15:36,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 00:15:36,962 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 00:15:37,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 00:15:37,095 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 00:15:37,096 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 00:15:37,096 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [814569656] [2022-01-10 00:15:37,096 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [814569656] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 00:15:37,096 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 00:15:37,096 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-01-10 00:15:37,096 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [777248009] [2022-01-10 00:15:37,096 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 00:15:37,097 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 00:15:37,097 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 00:15:37,098 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 00:15:37,098 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 00:15:37,098 INFO L87 Difference]: Start difference. First operand 665 states and 982 transitions. Second operand has 3 states, 3 states have (on average 35.333333333333336) internal successors, (106), 2 states have internal predecessors, (106), 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 00:15:38,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 00:15:38,854 INFO L93 Difference]: Finished difference Result 1955 states and 2894 transitions. [2022-01-10 00:15:38,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 00:15:38,855 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 35.333333333333336) internal successors, (106), 2 states have internal predecessors, (106), 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 106 [2022-01-10 00:15:38,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 00:15:38,859 INFO L225 Difference]: With dead ends: 1955 [2022-01-10 00:15:38,859 INFO L226 Difference]: Without dead ends: 1292 [2022-01-10 00:15:38,860 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 00:15:38,861 INFO L933 BasicCegarLoop]: 289 mSDtfsCounter, 258 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 1040 mSolverCounterSat, 209 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 258 SdHoareTripleChecker+Valid, 327 SdHoareTripleChecker+Invalid, 1249 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 209 IncrementalHoareTripleChecker+Valid, 1040 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-01-10 00:15:38,861 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [258 Valid, 327 Invalid, 1249 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [209 Valid, 1040 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-01-10 00:15:38,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1292 states. [2022-01-10 00:15:38,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1292 to 1282. [2022-01-10 00:15:38,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1282 states, 1281 states have (on average 1.3989071038251366) internal successors, (1792), 1281 states have internal predecessors, (1792), 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 00:15:38,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1282 states to 1282 states and 1792 transitions. [2022-01-10 00:15:38,886 INFO L78 Accepts]: Start accepts. Automaton has 1282 states and 1792 transitions. Word has length 106 [2022-01-10 00:15:38,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 00:15:38,887 INFO L470 AbstractCegarLoop]: Abstraction has 1282 states and 1792 transitions. [2022-01-10 00:15:38,887 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 35.333333333333336) internal successors, (106), 2 states have internal predecessors, (106), 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 00:15:38,887 INFO L276 IsEmpty]: Start isEmpty. Operand 1282 states and 1792 transitions. [2022-01-10 00:15:38,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2022-01-10 00:15:38,889 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 00:15:38,890 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 00:15:38,890 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-01-10 00:15:38,890 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 00:15:38,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 00:15:38,890 INFO L85 PathProgramCache]: Analyzing trace with hash -25567935, now seen corresponding path program 1 times [2022-01-10 00:15:38,890 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 00:15:38,891 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [155076017] [2022-01-10 00:15:38,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 00:15:38,891 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 00:15:38,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 00:15:38,966 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 00:15:38,966 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 00:15:38,967 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [155076017] [2022-01-10 00:15:38,967 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [155076017] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 00:15:38,967 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 00:15:38,967 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-01-10 00:15:38,967 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [325212343] [2022-01-10 00:15:38,967 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 00:15:38,967 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 00:15:38,968 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 00:15:38,968 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 00:15:38,968 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 00:15:38,968 INFO L87 Difference]: Start difference. First operand 1282 states and 1792 transitions. Second operand has 3 states, 3 states have (on average 36.666666666666664) internal successors, (110), 2 states have internal predecessors, (110), 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 00:15:40,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 00:15:40,452 INFO L93 Difference]: Finished difference Result 3764 states and 5263 transitions. [2022-01-10 00:15:40,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 00:15:40,452 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 36.666666666666664) internal successors, (110), 2 states have internal predecessors, (110), 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 110 [2022-01-10 00:15:40,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 00:15:40,459 INFO L225 Difference]: With dead ends: 3764 [2022-01-10 00:15:40,459 INFO L226 Difference]: Without dead ends: 2484 [2022-01-10 00:15:40,460 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 00:15:40,461 INFO L933 BasicCegarLoop]: 320 mSDtfsCounter, 236 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 955 mSolverCounterSat, 195 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 236 SdHoareTripleChecker+Valid, 366 SdHoareTripleChecker+Invalid, 1150 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 195 IncrementalHoareTripleChecker+Valid, 955 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-01-10 00:15:40,461 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [236 Valid, 366 Invalid, 1150 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [195 Valid, 955 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-01-10 00:15:40,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2484 states. [2022-01-10 00:15:40,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2484 to 2182. [2022-01-10 00:15:40,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2182 states, 2181 states have (on average 1.2815222375057314) internal successors, (2795), 2181 states have internal predecessors, (2795), 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 00:15:40,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2182 states to 2182 states and 2795 transitions. [2022-01-10 00:15:40,488 INFO L78 Accepts]: Start accepts. Automaton has 2182 states and 2795 transitions. Word has length 110 [2022-01-10 00:15:40,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 00:15:40,488 INFO L470 AbstractCegarLoop]: Abstraction has 2182 states and 2795 transitions. [2022-01-10 00:15:40,488 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 36.666666666666664) internal successors, (110), 2 states have internal predecessors, (110), 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 00:15:40,489 INFO L276 IsEmpty]: Start isEmpty. Operand 2182 states and 2795 transitions. [2022-01-10 00:15:40,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 202 [2022-01-10 00:15:40,492 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 00:15:40,493 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, 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, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 00:15:40,493 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-01-10 00:15:40,493 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 00:15:40,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 00:15:40,493 INFO L85 PathProgramCache]: Analyzing trace with hash -257680628, now seen corresponding path program 1 times [2022-01-10 00:15:40,493 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 00:15:40,493 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1837641267] [2022-01-10 00:15:40,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 00:15:40,494 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 00:15:40,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 00:15:40,596 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 57 proven. 0 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2022-01-10 00:15:40,596 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 00:15:40,596 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1837641267] [2022-01-10 00:15:40,596 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1837641267] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 00:15:40,596 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 00:15:40,597 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-01-10 00:15:40,597 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2127930508] [2022-01-10 00:15:40,597 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 00:15:40,597 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 00:15:40,597 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 00:15:40,598 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 00:15:40,598 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 00:15:40,598 INFO L87 Difference]: Start difference. First operand 2182 states and 2795 transitions. Second operand has 3 states, 3 states have (on average 41.333333333333336) internal successors, (124), 2 states have internal predecessors, (124), 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 00:15:41,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 00:15:41,667 INFO L93 Difference]: Finished difference Result 6166 states and 7961 transitions. [2022-01-10 00:15:41,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 00:15:41,667 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 41.333333333333336) internal successors, (124), 2 states have internal predecessors, (124), 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 201 [2022-01-10 00:15:41,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 00:15:41,677 INFO L225 Difference]: With dead ends: 6166 [2022-01-10 00:15:41,677 INFO L226 Difference]: Without dead ends: 3986 [2022-01-10 00:15:41,679 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 00:15:41,680 INFO L933 BasicCegarLoop]: 272 mSDtfsCounter, 257 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 791 mSolverCounterSat, 298 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 257 SdHoareTripleChecker+Valid, 339 SdHoareTripleChecker+Invalid, 1089 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 298 IncrementalHoareTripleChecker+Valid, 791 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-01-10 00:15:41,680 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [257 Valid, 339 Invalid, 1089 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [298 Valid, 791 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-01-10 00:15:41,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3986 states. [2022-01-10 00:15:41,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3986 to 3682. [2022-01-10 00:15:41,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3682 states, 3681 states have (on average 1.2200488997555012) internal successors, (4491), 3681 states have internal predecessors, (4491), 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 00:15:41,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3682 states to 3682 states and 4491 transitions. [2022-01-10 00:15:41,722 INFO L78 Accepts]: Start accepts. Automaton has 3682 states and 4491 transitions. Word has length 201 [2022-01-10 00:15:41,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 00:15:41,723 INFO L470 AbstractCegarLoop]: Abstraction has 3682 states and 4491 transitions. [2022-01-10 00:15:41,723 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 41.333333333333336) internal successors, (124), 2 states have internal predecessors, (124), 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 00:15:41,723 INFO L276 IsEmpty]: Start isEmpty. Operand 3682 states and 4491 transitions. [2022-01-10 00:15:41,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 304 [2022-01-10 00:15:41,725 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 00:15:41,725 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 00:15:41,725 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-01-10 00:15:41,726 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 00:15:41,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 00:15:41,726 INFO L85 PathProgramCache]: Analyzing trace with hash 593446436, now seen corresponding path program 1 times [2022-01-10 00:15:41,726 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 00:15:41,726 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [881449804] [2022-01-10 00:15:41,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 00:15:41,726 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 00:15:41,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 00:15:41,844 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 103 proven. 0 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2022-01-10 00:15:41,844 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 00:15:41,845 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [881449804] [2022-01-10 00:15:41,845 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [881449804] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 00:15:41,845 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 00:15:41,845 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-01-10 00:15:41,845 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [980007194] [2022-01-10 00:15:41,845 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 00:15:41,846 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 00:15:41,846 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 00:15:41,846 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 00:15:41,846 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 00:15:41,846 INFO L87 Difference]: Start difference. First operand 3682 states and 4491 transitions. Second operand has 3 states, 3 states have (on average 91.66666666666667) internal successors, (275), 2 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 00:15:43,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 00:15:43,198 INFO L93 Difference]: Finished difference Result 7661 states and 9291 transitions. [2022-01-10 00:15:43,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 00:15:43,198 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 91.66666666666667) internal successors, (275), 2 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 303 [2022-01-10 00:15:43,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 00:15:43,208 INFO L225 Difference]: With dead ends: 7661 [2022-01-10 00:15:43,208 INFO L226 Difference]: Without dead ends: 3981 [2022-01-10 00:15:43,212 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 00:15:43,213 INFO L933 BasicCegarLoop]: 324 mSDtfsCounter, 105 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 888 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 359 SdHoareTripleChecker+Invalid, 893 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 888 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-01-10 00:15:43,213 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [105 Valid, 359 Invalid, 893 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 888 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-01-10 00:15:43,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3981 states. [2022-01-10 00:15:43,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3981 to 3981. [2022-01-10 00:15:43,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3981 states, 3980 states have (on average 1.2050251256281408) internal successors, (4796), 3980 states have internal predecessors, (4796), 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 00:15:43,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3981 states to 3981 states and 4796 transitions. [2022-01-10 00:15:43,269 INFO L78 Accepts]: Start accepts. Automaton has 3981 states and 4796 transitions. Word has length 303 [2022-01-10 00:15:43,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 00:15:43,270 INFO L470 AbstractCegarLoop]: Abstraction has 3981 states and 4796 transitions. [2022-01-10 00:15:43,270 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 91.66666666666667) internal successors, (275), 2 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 00:15:43,270 INFO L276 IsEmpty]: Start isEmpty. Operand 3981 states and 4796 transitions. [2022-01-10 00:15:43,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 319 [2022-01-10 00:15:43,273 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 00:15:43,273 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, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 00:15:43,273 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-01-10 00:15:43,273 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 00:15:43,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 00:15:43,274 INFO L85 PathProgramCache]: Analyzing trace with hash -1446697707, now seen corresponding path program 1 times [2022-01-10 00:15:43,274 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 00:15:43,274 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [883050707] [2022-01-10 00:15:43,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 00:15:43,274 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 00:15:43,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 00:15:43,414 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 57 proven. 0 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2022-01-10 00:15:43,415 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 00:15:43,415 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [883050707] [2022-01-10 00:15:43,415 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [883050707] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 00:15:43,415 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 00:15:43,415 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 00:15:43,415 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [721560881] [2022-01-10 00:15:43,415 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 00:15:43,416 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 00:15:43,416 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 00:15:43,416 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 00:15:43,416 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 00:15:43,416 INFO L87 Difference]: Start difference. First operand 3981 states and 4796 transitions. Second operand has 3 states, 3 states have (on average 76.33333333333333) internal successors, (229), 3 states have internal predecessors, (229), 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 00:15:44,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 00:15:44,668 INFO L93 Difference]: Finished difference Result 9465 states and 11674 transitions. [2022-01-10 00:15:44,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 00:15:44,669 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 76.33333333333333) internal successors, (229), 3 states have internal predecessors, (229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 318 [2022-01-10 00:15:44,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 00:15:44,683 INFO L225 Difference]: With dead ends: 9465 [2022-01-10 00:15:44,684 INFO L226 Difference]: Without dead ends: 5785 [2022-01-10 00:15:44,689 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 00:15:44,691 INFO L933 BasicCegarLoop]: 632 mSDtfsCounter, 285 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 915 mSolverCounterSat, 237 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 285 SdHoareTripleChecker+Valid, 671 SdHoareTripleChecker+Invalid, 1152 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 237 IncrementalHoareTripleChecker+Valid, 915 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-01-10 00:15:44,694 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [285 Valid, 671 Invalid, 1152 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [237 Valid, 915 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-01-10 00:15:44,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5785 states. [2022-01-10 00:15:44,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5785 to 5783. [2022-01-10 00:15:44,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5783 states, 5782 states have (on average 1.1675890695261155) internal successors, (6751), 5782 states have internal predecessors, (6751), 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 00:15:44,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5783 states to 5783 states and 6751 transitions. [2022-01-10 00:15:44,762 INFO L78 Accepts]: Start accepts. Automaton has 5783 states and 6751 transitions. Word has length 318 [2022-01-10 00:15:44,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 00:15:44,763 INFO L470 AbstractCegarLoop]: Abstraction has 5783 states and 6751 transitions. [2022-01-10 00:15:44,763 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 76.33333333333333) internal successors, (229), 3 states have internal predecessors, (229), 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 00:15:44,763 INFO L276 IsEmpty]: Start isEmpty. Operand 5783 states and 6751 transitions. [2022-01-10 00:15:44,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 378 [2022-01-10 00:15:44,799 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 00:15:44,799 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 00:15:44,799 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-01-10 00:15:44,800 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 00:15:44,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 00:15:44,801 INFO L85 PathProgramCache]: Analyzing trace with hash 958857170, now seen corresponding path program 1 times [2022-01-10 00:15:44,801 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 00:15:44,801 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [634900059] [2022-01-10 00:15:44,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 00:15:44,801 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 00:15:44,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 00:15:44,929 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 57 proven. 0 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2022-01-10 00:15:44,930 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 00:15:44,930 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [634900059] [2022-01-10 00:15:44,930 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [634900059] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 00:15:44,930 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 00:15:44,930 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 00:15:44,930 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2026376665] [2022-01-10 00:15:44,930 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 00:15:44,930 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 00:15:44,930 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 00:15:44,931 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 00:15:44,931 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 00:15:44,931 INFO L87 Difference]: Start difference. First operand 5783 states and 6751 transitions. Second operand has 3 states, 3 states have (on average 101.0) internal successors, (303), 3 states have internal predecessors, (303), 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 00:15:45,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 00:15:45,933 INFO L93 Difference]: Finished difference Result 13368 states and 15921 transitions. [2022-01-10 00:15:45,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 00:15:45,948 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 101.0) internal successors, (303), 3 states have internal predecessors, (303), 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 377 [2022-01-10 00:15:45,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 00:15:45,967 INFO L225 Difference]: With dead ends: 13368 [2022-01-10 00:15:45,967 INFO L226 Difference]: Without dead ends: 7886 [2022-01-10 00:15:45,973 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 5 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 00:15:45,974 INFO L933 BasicCegarLoop]: 174 mSDtfsCounter, 362 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 848 mSolverCounterSat, 349 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 362 SdHoareTripleChecker+Valid, 192 SdHoareTripleChecker+Invalid, 1197 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 349 IncrementalHoareTripleChecker+Valid, 848 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-10 00:15:45,974 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [362 Valid, 192 Invalid, 1197 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [349 Valid, 848 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-01-10 00:15:45,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7886 states. [2022-01-10 00:15:46,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7886 to 6982. [2022-01-10 00:15:46,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6982 states, 6981 states have (on average 1.1981091534164159) internal successors, (8364), 6981 states have internal predecessors, (8364), 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 00:15:46,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6982 states to 6982 states and 8364 transitions. [2022-01-10 00:15:46,059 INFO L78 Accepts]: Start accepts. Automaton has 6982 states and 8364 transitions. Word has length 377 [2022-01-10 00:15:46,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 00:15:46,060 INFO L470 AbstractCegarLoop]: Abstraction has 6982 states and 8364 transitions. [2022-01-10 00:15:46,060 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 101.0) internal successors, (303), 3 states have internal predecessors, (303), 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 00:15:46,060 INFO L276 IsEmpty]: Start isEmpty. Operand 6982 states and 8364 transitions. [2022-01-10 00:15:46,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 393 [2022-01-10 00:15:46,064 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 00:15:46,064 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, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 00:15:46,064 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-01-10 00:15:46,064 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 00:15:46,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 00:15:46,065 INFO L85 PathProgramCache]: Analyzing trace with hash -160324221, now seen corresponding path program 1 times [2022-01-10 00:15:46,065 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 00:15:46,065 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [221163740] [2022-01-10 00:15:46,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 00:15:46,065 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 00:15:46,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 00:15:46,213 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 57 proven. 0 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2022-01-10 00:15:46,213 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 00:15:46,213 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [221163740] [2022-01-10 00:15:46,213 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [221163740] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 00:15:46,213 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 00:15:46,213 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 00:15:46,213 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1562332414] [2022-01-10 00:15:46,213 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 00:15:46,214 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 00:15:46,214 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 00:15:46,214 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 00:15:46,214 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 00:15:46,214 INFO L87 Difference]: Start difference. First operand 6982 states and 8364 transitions. Second operand has 3 states, 3 states have (on average 101.0) internal successors, (303), 3 states have internal predecessors, (303), 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 00:15:47,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 00:15:47,754 INFO L93 Difference]: Finished difference Result 16055 states and 19609 transitions. [2022-01-10 00:15:47,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 00:15:47,755 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 101.0) internal successors, (303), 3 states have internal predecessors, (303), 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 392 [2022-01-10 00:15:47,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 00:15:47,798 INFO L225 Difference]: With dead ends: 16055 [2022-01-10 00:15:47,798 INFO L226 Difference]: Without dead ends: 9374 [2022-01-10 00:15:47,805 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 00:15:47,806 INFO L933 BasicCegarLoop]: 276 mSDtfsCounter, 283 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 906 mSolverCounterSat, 206 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 283 SdHoareTripleChecker+Valid, 320 SdHoareTripleChecker+Invalid, 1112 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 206 IncrementalHoareTripleChecker+Valid, 906 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-01-10 00:15:47,806 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [283 Valid, 320 Invalid, 1112 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [206 Valid, 906 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-01-10 00:15:47,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9374 states. [2022-01-10 00:15:47,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9374 to 5780. [2022-01-10 00:15:47,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5780 states, 5779 states have (on average 1.2182038414950684) internal successors, (7040), 5779 states have internal predecessors, (7040), 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 00:15:47,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5780 states to 5780 states and 7040 transitions. [2022-01-10 00:15:47,898 INFO L78 Accepts]: Start accepts. Automaton has 5780 states and 7040 transitions. Word has length 392 [2022-01-10 00:15:47,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 00:15:47,898 INFO L470 AbstractCegarLoop]: Abstraction has 5780 states and 7040 transitions. [2022-01-10 00:15:47,899 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 101.0) internal successors, (303), 3 states have internal predecessors, (303), 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 00:15:47,899 INFO L276 IsEmpty]: Start isEmpty. Operand 5780 states and 7040 transitions. [2022-01-10 00:15:47,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 395 [2022-01-10 00:15:47,903 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 00:15:47,903 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, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 00:15:47,903 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-01-10 00:15:47,903 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 00:15:47,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 00:15:47,906 INFO L85 PathProgramCache]: Analyzing trace with hash 16466699, now seen corresponding path program 1 times [2022-01-10 00:15:47,906 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 00:15:47,907 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2075254368] [2022-01-10 00:15:47,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 00:15:47,907 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 00:15:47,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 00:15:48,067 INFO L134 CoverageAnalysis]: Checked inductivity of 137 backedges. 137 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 00:15:48,067 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 00:15:48,067 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2075254368] [2022-01-10 00:15:48,067 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2075254368] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 00:15:48,067 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 00:15:48,067 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 00:15:48,067 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1363874529] [2022-01-10 00:15:48,067 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 00:15:48,068 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 00:15:48,068 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 00:15:48,068 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 00:15:48,068 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 00:15:48,068 INFO L87 Difference]: Start difference. First operand 5780 states and 7040 transitions. Second operand has 3 states, 3 states have (on average 131.33333333333334) internal successors, (394), 3 states have internal predecessors, (394), 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 00:15:49,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 00:15:49,348 INFO L93 Difference]: Finished difference Result 12161 states and 14824 transitions. [2022-01-10 00:15:49,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 00:15:49,360 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 131.33333333333334) internal successors, (394), 3 states have internal predecessors, (394), 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 394 [2022-01-10 00:15:49,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 00:15:49,369 INFO L225 Difference]: With dead ends: 12161 [2022-01-10 00:15:49,369 INFO L226 Difference]: Without dead ends: 6682 [2022-01-10 00:15:49,375 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 00:15:49,379 INFO L933 BasicCegarLoop]: 584 mSDtfsCounter, 248 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 919 mSolverCounterSat, 206 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 248 SdHoareTripleChecker+Valid, 621 SdHoareTripleChecker+Invalid, 1125 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 206 IncrementalHoareTripleChecker+Valid, 919 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-01-10 00:15:49,379 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [248 Valid, 621 Invalid, 1125 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [206 Valid, 919 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-01-10 00:15:49,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6682 states. [2022-01-10 00:15:49,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6682 to 6079. [2022-01-10 00:15:49,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6079 states, 6078 states have (on average 1.1505429417571569) internal successors, (6993), 6078 states have internal predecessors, (6993), 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 00:15:49,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6079 states to 6079 states and 6993 transitions. [2022-01-10 00:15:49,437 INFO L78 Accepts]: Start accepts. Automaton has 6079 states and 6993 transitions. Word has length 394 [2022-01-10 00:15:49,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 00:15:49,438 INFO L470 AbstractCegarLoop]: Abstraction has 6079 states and 6993 transitions. [2022-01-10 00:15:49,438 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 131.33333333333334) internal successors, (394), 3 states have internal predecessors, (394), 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 00:15:49,438 INFO L276 IsEmpty]: Start isEmpty. Operand 6079 states and 6993 transitions. [2022-01-10 00:15:49,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 496 [2022-01-10 00:15:49,441 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 00:15:49,441 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, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 00:15:49,441 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-01-10 00:15:49,441 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 00:15:49,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 00:15:49,441 INFO L85 PathProgramCache]: Analyzing trace with hash -204355091, now seen corresponding path program 1 times [2022-01-10 00:15:49,442 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 00:15:49,442 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [328234729] [2022-01-10 00:15:49,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 00:15:49,442 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 00:15:49,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 00:15:49,653 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 86 proven. 0 refuted. 0 times theorem prover too weak. 275 trivial. 0 not checked. [2022-01-10 00:15:49,653 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 00:15:49,653 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [328234729] [2022-01-10 00:15:49,653 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [328234729] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 00:15:49,653 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 00:15:49,653 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 00:15:49,653 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1139596839] [2022-01-10 00:15:49,654 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 00:15:49,654 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 00:15:49,654 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 00:15:49,654 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 00:15:49,654 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 00:15:49,655 INFO L87 Difference]: Start difference. First operand 6079 states and 6993 transitions. Second operand has 3 states, 3 states have (on average 102.0) internal successors, (306), 3 states have internal predecessors, (306), 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 00:15:51,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 00:15:51,084 INFO L93 Difference]: Finished difference Result 13949 states and 16348 transitions. [2022-01-10 00:15:51,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 00:15:51,084 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 102.0) internal successors, (306), 3 states have internal predecessors, (306), 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 495 [2022-01-10 00:15:51,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 00:15:51,095 INFO L225 Difference]: With dead ends: 13949 [2022-01-10 00:15:51,095 INFO L226 Difference]: Without dead ends: 8171 [2022-01-10 00:15:51,100 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 00:15:51,100 INFO L933 BasicCegarLoop]: 427 mSDtfsCounter, 384 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 969 mSolverCounterSat, 127 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 384 SdHoareTripleChecker+Valid, 447 SdHoareTripleChecker+Invalid, 1096 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 127 IncrementalHoareTripleChecker+Valid, 969 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-01-10 00:15:51,100 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [384 Valid, 447 Invalid, 1096 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [127 Valid, 969 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-01-10 00:15:51,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8171 states. [2022-01-10 00:15:51,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8171 to 8171. [2022-01-10 00:15:51,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8171 states, 8170 states have (on average 1.1615667074663403) internal successors, (9490), 8170 states have internal predecessors, (9490), 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 00:15:51,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8171 states to 8171 states and 9490 transitions. [2022-01-10 00:15:51,176 INFO L78 Accepts]: Start accepts. Automaton has 8171 states and 9490 transitions. Word has length 495 [2022-01-10 00:15:51,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 00:15:51,177 INFO L470 AbstractCegarLoop]: Abstraction has 8171 states and 9490 transitions. [2022-01-10 00:15:51,177 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 102.0) internal successors, (306), 3 states have internal predecessors, (306), 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 00:15:51,177 INFO L276 IsEmpty]: Start isEmpty. Operand 8171 states and 9490 transitions. [2022-01-10 00:15:51,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 587 [2022-01-10 00:15:51,181 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 00:15:51,182 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-01-10 00:15:51,182 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-01-10 00:15:51,182 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 00:15:51,182 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 00:15:51,182 INFO L85 PathProgramCache]: Analyzing trace with hash -1199657310, now seen corresponding path program 1 times [2022-01-10 00:15:51,182 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 00:15:51,182 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [841171982] [2022-01-10 00:15:51,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 00:15:51,183 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 00:15:51,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 00:15:51,357 INFO L134 CoverageAnalysis]: Checked inductivity of 771 backedges. 554 proven. 39 refuted. 0 times theorem prover too weak. 178 trivial. 0 not checked. [2022-01-10 00:15:51,358 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 00:15:51,358 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [841171982] [2022-01-10 00:15:51,358 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [841171982] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-10 00:15:51,358 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1222096987] [2022-01-10 00:15:51,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 00:15:51,358 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 00:15:51,358 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 00:15:51,377 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 00:15:51,380 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 00:15:51,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 00:15:51,608 INFO L263 TraceCheckSpWp]: Trace formula consists of 736 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-10 00:15:51,649 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 00:15:53,156 INFO L134 CoverageAnalysis]: Checked inductivity of 771 backedges. 554 proven. 39 refuted. 0 times theorem prover too weak. 178 trivial. 0 not checked. [2022-01-10 00:15:53,156 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 00:15:54,560 INFO L134 CoverageAnalysis]: Checked inductivity of 771 backedges. 554 proven. 39 refuted. 0 times theorem prover too weak. 178 trivial. 0 not checked. [2022-01-10 00:15:54,561 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1222096987] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 00:15:54,561 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-10 00:15:54,561 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 8 [2022-01-10 00:15:54,561 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1364839239] [2022-01-10 00:15:54,561 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-10 00:15:54,562 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-01-10 00:15:54,562 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 00:15:54,563 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-01-10 00:15:54,563 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2022-01-10 00:15:54,563 INFO L87 Difference]: Start difference. First operand 8171 states and 9490 transitions. Second operand has 9 states, 9 states have (on average 80.77777777777777) internal successors, (727), 8 states have internal predecessors, (727), 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 00:16:00,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 00:16:00,201 INFO L93 Difference]: Finished difference Result 22581 states and 26003 transitions. [2022-01-10 00:16:00,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-01-10 00:16:00,201 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 80.77777777777777) internal successors, (727), 8 states have internal predecessors, (727), 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 586 [2022-01-10 00:16:00,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 00:16:00,213 INFO L225 Difference]: With dead ends: 22581 [2022-01-10 00:16:00,214 INFO L226 Difference]: Without dead ends: 10863 [2022-01-10 00:16:00,219 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1181 GetRequests, 1166 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=89, Invalid=151, Unknown=0, NotChecked=0, Total=240 [2022-01-10 00:16:00,220 INFO L933 BasicCegarLoop]: 104 mSDtfsCounter, 2680 mSDsluCounter, 219 mSDsCounter, 0 mSdLazyCounter, 6990 mSolverCounterSat, 648 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2680 SdHoareTripleChecker+Valid, 323 SdHoareTripleChecker+Invalid, 7638 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 648 IncrementalHoareTripleChecker+Valid, 6990 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.4s IncrementalHoareTripleChecker+Time [2022-01-10 00:16:00,220 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2680 Valid, 323 Invalid, 7638 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [648 Valid, 6990 Invalid, 0 Unknown, 0 Unchecked, 5.4s Time] [2022-01-10 00:16:00,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10863 states. [2022-01-10 00:16:00,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10863 to 7870. [2022-01-10 00:16:00,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7870 states, 7869 states have (on average 1.069513279959334) internal successors, (8416), 7869 states have internal predecessors, (8416), 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 00:16:00,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7870 states to 7870 states and 8416 transitions. [2022-01-10 00:16:00,291 INFO L78 Accepts]: Start accepts. Automaton has 7870 states and 8416 transitions. Word has length 586 [2022-01-10 00:16:00,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 00:16:00,291 INFO L470 AbstractCegarLoop]: Abstraction has 7870 states and 8416 transitions. [2022-01-10 00:16:00,291 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 80.77777777777777) internal successors, (727), 8 states have internal predecessors, (727), 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 00:16:00,291 INFO L276 IsEmpty]: Start isEmpty. Operand 7870 states and 8416 transitions. [2022-01-10 00:16:00,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 629 [2022-01-10 00:16:00,295 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 00:16:00,295 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 00:16:00,334 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-01-10 00:16:00,511 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-01-10 00:16:00,511 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 00:16:00,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 00:16:00,512 INFO L85 PathProgramCache]: Analyzing trace with hash 444051116, now seen corresponding path program 1 times [2022-01-10 00:16:00,512 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 00:16:00,512 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [719250713] [2022-01-10 00:16:00,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 00:16:00,512 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 00:16:00,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 00:16:00,650 INFO L134 CoverageAnalysis]: Checked inductivity of 736 backedges. 373 proven. 0 refuted. 0 times theorem prover too weak. 363 trivial. 0 not checked. [2022-01-10 00:16:00,651 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 00:16:00,651 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [719250713] [2022-01-10 00:16:00,651 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [719250713] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 00:16:00,651 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 00:16:00,651 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 00:16:00,651 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [635424782] [2022-01-10 00:16:00,651 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 00:16:00,652 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 00:16:00,652 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 00:16:00,652 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 00:16:00,652 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 00:16:00,652 INFO L87 Difference]: Start difference. First operand 7870 states and 8416 transitions. Second operand has 3 states, 3 states have (on average 124.66666666666667) internal successors, (374), 3 states have internal predecessors, (374), 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 00:16:01,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 00:16:01,515 INFO L93 Difference]: Finished difference Result 15437 states and 16527 transitions. [2022-01-10 00:16:01,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 00:16:01,515 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 124.66666666666667) internal successors, (374), 3 states have internal predecessors, (374), 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 628 [2022-01-10 00:16:01,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 00:16:01,524 INFO L225 Difference]: With dead ends: 15437 [2022-01-10 00:16:01,524 INFO L226 Difference]: Without dead ends: 7868 [2022-01-10 00:16:01,529 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 00:16:01,529 INFO L933 BasicCegarLoop]: 64 mSDtfsCounter, 437 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 736 mSolverCounterSat, 94 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 437 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 830 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 94 IncrementalHoareTripleChecker+Valid, 736 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-10 00:16:01,530 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [437 Valid, 69 Invalid, 830 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [94 Valid, 736 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-10 00:16:01,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7868 states. [2022-01-10 00:16:01,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7868 to 7868. [2022-01-10 00:16:01,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7868 states, 7867 states have (on average 1.0692767255624762) internal successors, (8412), 7867 states have internal predecessors, (8412), 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 00:16:01,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7868 states to 7868 states and 8412 transitions. [2022-01-10 00:16:01,604 INFO L78 Accepts]: Start accepts. Automaton has 7868 states and 8412 transitions. Word has length 628 [2022-01-10 00:16:01,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 00:16:01,604 INFO L470 AbstractCegarLoop]: Abstraction has 7868 states and 8412 transitions. [2022-01-10 00:16:01,604 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 124.66666666666667) internal successors, (374), 3 states have internal predecessors, (374), 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 00:16:01,604 INFO L276 IsEmpty]: Start isEmpty. Operand 7868 states and 8412 transitions. [2022-01-10 00:16:01,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 657 [2022-01-10 00:16:01,613 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 00:16:01,614 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, 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, 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, 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, 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] [2022-01-10 00:16:01,614 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-01-10 00:16:01,614 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 00:16:01,614 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 00:16:01,614 INFO L85 PathProgramCache]: Analyzing trace with hash -1737174082, now seen corresponding path program 1 times [2022-01-10 00:16:01,614 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 00:16:01,614 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1801197567] [2022-01-10 00:16:01,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 00:16:01,615 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 00:16:01,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 00:16:01,797 INFO L134 CoverageAnalysis]: Checked inductivity of 546 backedges. 86 proven. 0 refuted. 0 times theorem prover too weak. 460 trivial. 0 not checked. [2022-01-10 00:16:01,797 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 00:16:01,797 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1801197567] [2022-01-10 00:16:01,797 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1801197567] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 00:16:01,797 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 00:16:01,797 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 00:16:01,798 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [676282348] [2022-01-10 00:16:01,798 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 00:16:01,798 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 00:16:01,798 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 00:16:01,799 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 00:16:01,799 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 00:16:01,799 INFO L87 Difference]: Start difference. First operand 7868 states and 8412 transitions. Second operand has 3 states, 3 states have (on average 101.33333333333333) internal successors, (304), 3 states have internal predecessors, (304), 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 00:16:02,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 00:16:02,725 INFO L93 Difference]: Finished difference Result 17826 states and 19195 transitions. [2022-01-10 00:16:02,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 00:16:02,725 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 101.33333333333333) internal successors, (304), 3 states have internal predecessors, (304), 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 656 [2022-01-10 00:16:02,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 00:16:02,736 INFO L225 Difference]: With dead ends: 17826 [2022-01-10 00:16:02,736 INFO L226 Difference]: Without dead ends: 9960 [2022-01-10 00:16:02,743 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 00:16:02,745 INFO L933 BasicCegarLoop]: 157 mSDtfsCounter, 299 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 799 mSolverCounterSat, 115 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 299 SdHoareTripleChecker+Valid, 190 SdHoareTripleChecker+Invalid, 914 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 115 IncrementalHoareTripleChecker+Valid, 799 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-10 00:16:02,745 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [299 Valid, 190 Invalid, 914 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [115 Valid, 799 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-01-10 00:16:02,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9960 states. [2022-01-10 00:16:02,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9960 to 9660. [2022-01-10 00:16:02,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9660 states, 9659 states have (on average 1.0658453256030644) internal successors, (10295), 9659 states have internal predecessors, (10295), 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 00:16:02,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9660 states to 9660 states and 10295 transitions. [2022-01-10 00:16:02,870 INFO L78 Accepts]: Start accepts. Automaton has 9660 states and 10295 transitions. Word has length 656 [2022-01-10 00:16:02,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 00:16:02,870 INFO L470 AbstractCegarLoop]: Abstraction has 9660 states and 10295 transitions. [2022-01-10 00:16:02,871 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 101.33333333333333) internal successors, (304), 3 states have internal predecessors, (304), 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 00:16:02,871 INFO L276 IsEmpty]: Start isEmpty. Operand 9660 states and 10295 transitions. [2022-01-10 00:16:02,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 663 [2022-01-10 00:16:02,875 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 00:16:02,875 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 00:16:02,875 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-01-10 00:16:02,876 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 00:16:02,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 00:16:02,876 INFO L85 PathProgramCache]: Analyzing trace with hash -297771134, now seen corresponding path program 1 times [2022-01-10 00:16:02,876 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 00:16:02,876 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [435078245] [2022-01-10 00:16:02,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 00:16:02,876 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 00:16:02,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 00:16:03,041 INFO L134 CoverageAnalysis]: Checked inductivity of 721 backedges. 382 proven. 0 refuted. 0 times theorem prover too weak. 339 trivial. 0 not checked. [2022-01-10 00:16:03,041 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 00:16:03,042 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [435078245] [2022-01-10 00:16:03,042 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [435078245] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 00:16:03,042 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 00:16:03,042 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 00:16:03,042 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [124391494] [2022-01-10 00:16:03,042 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 00:16:03,043 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 00:16:03,043 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 00:16:03,043 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 00:16:03,043 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 00:16:03,043 INFO L87 Difference]: Start difference. First operand 9660 states and 10295 transitions. Second operand has 3 states, 3 states have (on average 133.33333333333334) internal successors, (400), 3 states have internal predecessors, (400), 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 00:16:03,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 00:16:03,878 INFO L93 Difference]: Finished difference Result 20516 states and 21979 transitions. [2022-01-10 00:16:03,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 00:16:03,878 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 133.33333333333334) internal successors, (400), 3 states have internal predecessors, (400), 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 662 [2022-01-10 00:16:03,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 00:16:03,887 INFO L225 Difference]: With dead ends: 20516 [2022-01-10 00:16:03,888 INFO L226 Difference]: Without dead ends: 11157 [2022-01-10 00:16:03,893 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 00:16:03,893 INFO L933 BasicCegarLoop]: 482 mSDtfsCounter, 225 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 754 mSolverCounterSat, 100 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 225 SdHoareTripleChecker+Valid, 516 SdHoareTripleChecker+Invalid, 854 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 100 IncrementalHoareTripleChecker+Valid, 754 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-10 00:16:03,894 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [225 Valid, 516 Invalid, 854 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [100 Valid, 754 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-10 00:16:03,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11157 states. [2022-01-10 00:16:03,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11157 to 11157. [2022-01-10 00:16:03,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11157 states, 11156 states have (on average 1.056830405163141) internal successors, (11790), 11156 states have internal predecessors, (11790), 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 00:16:03,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11157 states to 11157 states and 11790 transitions. [2022-01-10 00:16:03,987 INFO L78 Accepts]: Start accepts. Automaton has 11157 states and 11790 transitions. Word has length 662 [2022-01-10 00:16:03,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 00:16:03,988 INFO L470 AbstractCegarLoop]: Abstraction has 11157 states and 11790 transitions. [2022-01-10 00:16:03,988 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 133.33333333333334) internal successors, (400), 3 states have internal predecessors, (400), 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 00:16:03,988 INFO L276 IsEmpty]: Start isEmpty. Operand 11157 states and 11790 transitions. [2022-01-10 00:16:03,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 664 [2022-01-10 00:16:03,993 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 00:16:03,993 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 00:16:03,993 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-01-10 00:16:03,993 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 00:16:03,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 00:16:03,993 INFO L85 PathProgramCache]: Analyzing trace with hash -1894546033, now seen corresponding path program 1 times [2022-01-10 00:16:03,994 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 00:16:03,994 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [491410715] [2022-01-10 00:16:03,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 00:16:03,994 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 00:16:04,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 00:16:04,205 INFO L134 CoverageAnalysis]: Checked inductivity of 749 backedges. 530 proven. 190 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2022-01-10 00:16:04,205 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 00:16:04,205 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [491410715] [2022-01-10 00:16:04,205 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [491410715] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-10 00:16:04,205 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [678565997] [2022-01-10 00:16:04,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 00:16:04,205 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 00:16:04,205 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 00:16:04,206 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 00:16:04,207 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 00:16:04,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 00:16:04,363 INFO L263 TraceCheckSpWp]: Trace formula consists of 816 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-10 00:16:04,369 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 00:16:05,175 INFO L134 CoverageAnalysis]: Checked inductivity of 749 backedges. 635 proven. 85 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2022-01-10 00:16:05,175 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 00:16:05,891 INFO L134 CoverageAnalysis]: Checked inductivity of 749 backedges. 635 proven. 85 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2022-01-10 00:16:05,892 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [678565997] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 00:16:05,892 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-10 00:16:05,892 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 9 [2022-01-10 00:16:05,894 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [700311106] [2022-01-10 00:16:05,894 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-10 00:16:05,895 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-01-10 00:16:05,895 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 00:16:05,895 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-01-10 00:16:05,895 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2022-01-10 00:16:05,895 INFO L87 Difference]: Start difference. First operand 11157 states and 11790 transitions. Second operand has 9 states, 9 states have (on average 143.66666666666666) internal successors, (1293), 9 states have internal predecessors, (1293), 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 00:16:12,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 00:16:12,088 INFO L93 Difference]: Finished difference Result 36760 states and 39153 transitions. [2022-01-10 00:16:12,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-01-10 00:16:12,088 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 143.66666666666666) internal successors, (1293), 9 states have internal predecessors, (1293), 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 663 [2022-01-10 00:16:12,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 00:16:12,110 INFO L225 Difference]: With dead ends: 36760 [2022-01-10 00:16:12,110 INFO L226 Difference]: Without dead ends: 25904 [2022-01-10 00:16:12,116 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1352 GetRequests, 1333 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=120, Invalid=300, Unknown=0, NotChecked=0, Total=420 [2022-01-10 00:16:12,117 INFO L933 BasicCegarLoop]: 67 mSDtfsCounter, 3800 mSDsluCounter, 247 mSDsCounter, 0 mSdLazyCounter, 8454 mSolverCounterSat, 943 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3800 SdHoareTripleChecker+Valid, 314 SdHoareTripleChecker+Invalid, 9397 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 943 IncrementalHoareTripleChecker+Valid, 8454 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.8s IncrementalHoareTripleChecker+Time [2022-01-10 00:16:12,117 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3800 Valid, 314 Invalid, 9397 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [943 Valid, 8454 Invalid, 0 Unknown, 0 Unchecked, 5.8s Time] [2022-01-10 00:16:12,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25904 states. [2022-01-10 00:16:12,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25904 to 16547. [2022-01-10 00:16:12,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16547 states, 16546 states have (on average 1.0505258068415326) internal successors, (17382), 16546 states have internal predecessors, (17382), 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 00:16:12,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16547 states to 16547 states and 17382 transitions. [2022-01-10 00:16:12,290 INFO L78 Accepts]: Start accepts. Automaton has 16547 states and 17382 transitions. Word has length 663 [2022-01-10 00:16:12,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 00:16:12,290 INFO L470 AbstractCegarLoop]: Abstraction has 16547 states and 17382 transitions. [2022-01-10 00:16:12,290 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 143.66666666666666) internal successors, (1293), 9 states have internal predecessors, (1293), 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 00:16:12,290 INFO L276 IsEmpty]: Start isEmpty. Operand 16547 states and 17382 transitions. [2022-01-10 00:16:12,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 710 [2022-01-10 00:16:12,297 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 00:16:12,297 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, 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, 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, 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, 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, 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] [2022-01-10 00:16:12,314 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 00:16:12,514 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,SelfDestructingSolverStorable14 [2022-01-10 00:16:12,514 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 00:16:12,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 00:16:12,515 INFO L85 PathProgramCache]: Analyzing trace with hash -2143864280, now seen corresponding path program 1 times [2022-01-10 00:16:12,515 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 00:16:12,515 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [942928168] [2022-01-10 00:16:12,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 00:16:12,515 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 00:16:12,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 00:16:12,748 INFO L134 CoverageAnalysis]: Checked inductivity of 580 backedges. 474 proven. 0 refuted. 0 times theorem prover too weak. 106 trivial. 0 not checked. [2022-01-10 00:16:12,749 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 00:16:12,749 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [942928168] [2022-01-10 00:16:12,749 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [942928168] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 00:16:12,749 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 00:16:12,749 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 00:16:12,749 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [997906614] [2022-01-10 00:16:12,749 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 00:16:12,749 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 00:16:12,750 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 00:16:12,750 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 00:16:12,750 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 00:16:12,750 INFO L87 Difference]: Start difference. First operand 16547 states and 17382 transitions. Second operand has 3 states, 3 states have (on average 201.33333333333334) internal successors, (604), 3 states have internal predecessors, (604), 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 00:16:13,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 00:16:13,749 INFO L93 Difference]: Finished difference Result 37577 states and 39545 transitions. [2022-01-10 00:16:13,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 00:16:13,749 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 201.33333333333334) internal successors, (604), 3 states have internal predecessors, (604), 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 709 [2022-01-10 00:16:13,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 00:16:13,770 INFO L225 Difference]: With dead ends: 37577 [2022-01-10 00:16:13,770 INFO L226 Difference]: Without dead ends: 21032 [2022-01-10 00:16:13,782 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 00:16:13,783 INFO L933 BasicCegarLoop]: 132 mSDtfsCounter, 61 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 801 mSolverCounterSat, 114 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 161 SdHoareTripleChecker+Invalid, 915 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 114 IncrementalHoareTripleChecker+Valid, 801 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-10 00:16:13,783 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [61 Valid, 161 Invalid, 915 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [114 Valid, 801 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-01-10 00:16:13,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21032 states. [2022-01-10 00:16:13,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21032 to 20135. [2022-01-10 00:16:13,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20135 states, 20134 states have (on average 1.046687195788219) internal successors, (21074), 20134 states have internal predecessors, (21074), 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 00:16:13,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20135 states to 20135 states and 21074 transitions. [2022-01-10 00:16:13,981 INFO L78 Accepts]: Start accepts. Automaton has 20135 states and 21074 transitions. Word has length 709 [2022-01-10 00:16:13,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 00:16:13,982 INFO L470 AbstractCegarLoop]: Abstraction has 20135 states and 21074 transitions. [2022-01-10 00:16:13,982 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 201.33333333333334) internal successors, (604), 3 states have internal predecessors, (604), 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 00:16:13,982 INFO L276 IsEmpty]: Start isEmpty. Operand 20135 states and 21074 transitions. [2022-01-10 00:16:13,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 713 [2022-01-10 00:16:13,990 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 00:16:13,991 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 00:16:13,991 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-01-10 00:16:13,991 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 00:16:13,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 00:16:13,991 INFO L85 PathProgramCache]: Analyzing trace with hash -1049992847, now seen corresponding path program 1 times [2022-01-10 00:16:13,991 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 00:16:13,992 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [603217335] [2022-01-10 00:16:13,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 00:16:13,992 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 00:16:14,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 00:16:14,232 INFO L134 CoverageAnalysis]: Checked inductivity of 845 backedges. 511 proven. 0 refuted. 0 times theorem prover too weak. 334 trivial. 0 not checked. [2022-01-10 00:16:14,232 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 00:16:14,233 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [603217335] [2022-01-10 00:16:14,233 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [603217335] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 00:16:14,233 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 00:16:14,233 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 00:16:14,233 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [403580998] [2022-01-10 00:16:14,233 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 00:16:14,234 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-10 00:16:14,234 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 00:16:14,234 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-10 00:16:14,234 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-01-10 00:16:14,235 INFO L87 Difference]: Start difference. First operand 20135 states and 21074 transitions. Second operand has 4 states, 4 states have (on average 121.5) internal successors, (486), 4 states have internal predecessors, (486), 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 00:16:15,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 00:16:15,512 INFO L93 Difference]: Finished difference Result 43861 states and 45930 transitions. [2022-01-10 00:16:15,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-10 00:16:15,512 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 121.5) internal successors, (486), 4 states have internal predecessors, (486), 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 712 [2022-01-10 00:16:15,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 00:16:15,532 INFO L225 Difference]: With dead ends: 43861 [2022-01-10 00:16:15,533 INFO L226 Difference]: Without dead ends: 24027 [2022-01-10 00:16:15,544 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-01-10 00:16:15,545 INFO L933 BasicCegarLoop]: 110 mSDtfsCounter, 652 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 1143 mSolverCounterSat, 152 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 652 SdHoareTripleChecker+Valid, 150 SdHoareTripleChecker+Invalid, 1295 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 152 IncrementalHoareTripleChecker+Valid, 1143 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-01-10 00:16:15,545 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [652 Valid, 150 Invalid, 1295 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [152 Valid, 1143 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-01-10 00:16:15,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24027 states. [2022-01-10 00:16:15,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24027 to 20135. [2022-01-10 00:16:15,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20135 states, 20134 states have (on average 1.046687195788219) internal successors, (21074), 20134 states have internal predecessors, (21074), 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 00:16:15,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20135 states to 20135 states and 21074 transitions. [2022-01-10 00:16:15,721 INFO L78 Accepts]: Start accepts. Automaton has 20135 states and 21074 transitions. Word has length 712 [2022-01-10 00:16:15,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 00:16:15,721 INFO L470 AbstractCegarLoop]: Abstraction has 20135 states and 21074 transitions. [2022-01-10 00:16:15,721 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 121.5) internal successors, (486), 4 states have internal predecessors, (486), 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 00:16:15,722 INFO L276 IsEmpty]: Start isEmpty. Operand 20135 states and 21074 transitions. [2022-01-10 00:16:15,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 726 [2022-01-10 00:16:15,729 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 00:16:15,729 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 00:16:15,729 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-01-10 00:16:15,729 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 00:16:15,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 00:16:15,730 INFO L85 PathProgramCache]: Analyzing trace with hash 255775377, now seen corresponding path program 1 times [2022-01-10 00:16:15,730 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 00:16:15,730 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [361365465] [2022-01-10 00:16:15,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 00:16:15,730 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 00:16:15,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 00:16:15,941 INFO L134 CoverageAnalysis]: Checked inductivity of 823 backedges. 115 proven. 0 refuted. 0 times theorem prover too weak. 708 trivial. 0 not checked. [2022-01-10 00:16:15,941 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 00:16:15,941 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [361365465] [2022-01-10 00:16:15,942 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [361365465] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 00:16:15,942 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 00:16:15,942 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 00:16:15,942 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [129846705] [2022-01-10 00:16:15,942 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 00:16:15,942 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 00:16:15,942 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 00:16:15,942 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 00:16:15,943 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 00:16:15,943 INFO L87 Difference]: Start difference. First operand 20135 states and 21074 transitions. Second operand has 3 states, 3 states have (on average 105.66666666666667) internal successors, (317), 3 states have internal predecessors, (317), 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 00:16:16,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 00:16:16,893 INFO L93 Difference]: Finished difference Result 40274 states and 42148 transitions. [2022-01-10 00:16:16,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 00:16:16,894 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 105.66666666666667) internal successors, (317), 3 states have internal predecessors, (317), 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 725 [2022-01-10 00:16:16,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 00:16:16,911 INFO L225 Difference]: With dead ends: 40274 [2022-01-10 00:16:16,911 INFO L226 Difference]: Without dead ends: 20141 [2022-01-10 00:16:16,924 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 00:16:16,925 INFO L933 BasicCegarLoop]: 495 mSDtfsCounter, 292 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 832 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 292 SdHoareTripleChecker+Valid, 533 SdHoareTripleChecker+Invalid, 868 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 832 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-10 00:16:16,925 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [292 Valid, 533 Invalid, 868 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 832 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-01-10 00:16:16,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20141 states. [2022-01-10 00:16:17,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20141 to 19834. [2022-01-10 00:16:17,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19834 states, 19833 states have (on average 1.0454293349468058) internal successors, (20734), 19833 states have internal predecessors, (20734), 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 00:16:17,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19834 states to 19834 states and 20734 transitions. [2022-01-10 00:16:17,087 INFO L78 Accepts]: Start accepts. Automaton has 19834 states and 20734 transitions. Word has length 725 [2022-01-10 00:16:17,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 00:16:17,087 INFO L470 AbstractCegarLoop]: Abstraction has 19834 states and 20734 transitions. [2022-01-10 00:16:17,088 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 105.66666666666667) internal successors, (317), 3 states have internal predecessors, (317), 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 00:16:17,088 INFO L276 IsEmpty]: Start isEmpty. Operand 19834 states and 20734 transitions. [2022-01-10 00:16:17,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 740 [2022-01-10 00:16:17,095 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 00:16:17,095 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 00:16:17,095 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-01-10 00:16:17,095 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 00:16:17,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 00:16:17,096 INFO L85 PathProgramCache]: Analyzing trace with hash -1001674660, now seen corresponding path program 1 times [2022-01-10 00:16:17,096 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 00:16:17,096 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1140373884] [2022-01-10 00:16:17,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 00:16:17,096 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 00:16:17,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 00:16:17,311 INFO L134 CoverageAnalysis]: Checked inductivity of 901 backedges. 519 proven. 0 refuted. 0 times theorem prover too weak. 382 trivial. 0 not checked. [2022-01-10 00:16:17,311 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 00:16:17,311 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1140373884] [2022-01-10 00:16:17,311 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1140373884] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 00:16:17,311 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 00:16:17,311 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 00:16:17,311 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [288936491] [2022-01-10 00:16:17,311 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 00:16:17,312 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 00:16:17,312 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 00:16:17,313 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 00:16:17,313 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 00:16:17,313 INFO L87 Difference]: Start difference. First operand 19834 states and 20734 transitions. Second operand has 3 states, 3 states have (on average 155.0) internal successors, (465), 3 states have internal predecessors, (465), 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 00:16:18,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 00:16:18,286 INFO L93 Difference]: Finished difference Result 42667 states and 44700 transitions. [2022-01-10 00:16:18,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 00:16:18,287 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 155.0) internal successors, (465), 3 states have internal predecessors, (465), 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 739 [2022-01-10 00:16:18,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 00:16:18,308 INFO L225 Difference]: With dead ends: 42667 [2022-01-10 00:16:18,308 INFO L226 Difference]: Without dead ends: 23134 [2022-01-10 00:16:18,318 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 00:16:18,319 INFO L933 BasicCegarLoop]: 502 mSDtfsCounter, 173 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 775 mSolverCounterSat, 72 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 173 SdHoareTripleChecker+Valid, 545 SdHoareTripleChecker+Invalid, 847 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 775 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-10 00:16:18,320 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [173 Valid, 545 Invalid, 847 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [72 Valid, 775 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-10 00:16:18,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23134 states. [2022-01-10 00:16:18,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23134 to 22536. [2022-01-10 00:16:18,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22536 states, 22535 states have (on average 1.0402928777457288) internal successors, (23443), 22535 states have internal predecessors, (23443), 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 00:16:18,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22536 states to 22536 states and 23443 transitions. [2022-01-10 00:16:18,511 INFO L78 Accepts]: Start accepts. Automaton has 22536 states and 23443 transitions. Word has length 739 [2022-01-10 00:16:18,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 00:16:18,511 INFO L470 AbstractCegarLoop]: Abstraction has 22536 states and 23443 transitions. [2022-01-10 00:16:18,511 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 155.0) internal successors, (465), 3 states have internal predecessors, (465), 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 00:16:18,512 INFO L276 IsEmpty]: Start isEmpty. Operand 22536 states and 23443 transitions. [2022-01-10 00:16:18,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 766 [2022-01-10 00:16:18,521 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 00:16:18,521 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 00:16:18,521 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-01-10 00:16:18,521 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 00:16:18,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 00:16:18,522 INFO L85 PathProgramCache]: Analyzing trace with hash 1052138887, now seen corresponding path program 1 times [2022-01-10 00:16:18,522 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 00:16:18,522 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1802314513] [2022-01-10 00:16:18,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 00:16:18,522 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 00:16:18,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 00:16:18,784 INFO L134 CoverageAnalysis]: Checked inductivity of 922 backedges. 115 proven. 0 refuted. 0 times theorem prover too weak. 807 trivial. 0 not checked. [2022-01-10 00:16:18,784 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 00:16:18,785 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1802314513] [2022-01-10 00:16:18,785 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1802314513] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 00:16:18,785 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 00:16:18,785 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 00:16:18,786 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [907507987] [2022-01-10 00:16:18,786 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 00:16:18,786 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 00:16:18,786 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 00:16:18,786 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 00:16:18,786 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 00:16:18,787 INFO L87 Difference]: Start difference. First operand 22536 states and 23443 transitions. Second operand has 3 states, 3 states have (on average 105.66666666666667) internal successors, (317), 3 states have internal predecessors, (317), 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 00:16:19,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 00:16:19,693 INFO L93 Difference]: Finished difference Result 51058 states and 53155 transitions. [2022-01-10 00:16:19,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 00:16:19,694 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 105.66666666666667) internal successors, (317), 3 states have internal predecessors, (317), 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 765 [2022-01-10 00:16:19,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 00:16:19,722 INFO L225 Difference]: With dead ends: 51058 [2022-01-10 00:16:19,722 INFO L226 Difference]: Without dead ends: 28823 [2022-01-10 00:16:19,735 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 00:16:19,736 INFO L933 BasicCegarLoop]: 396 mSDtfsCounter, 312 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 780 mSolverCounterSat, 126 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 312 SdHoareTripleChecker+Valid, 420 SdHoareTripleChecker+Invalid, 906 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 126 IncrementalHoareTripleChecker+Valid, 780 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-10 00:16:19,736 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [312 Valid, 420 Invalid, 906 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [126 Valid, 780 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-10 00:16:19,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28823 states. [2022-01-10 00:16:19,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28823 to 25821. [2022-01-10 00:16:19,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25821 states, 25820 states have (on average 1.039697908597986) internal successors, (26845), 25820 states have internal predecessors, (26845), 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 00:16:19,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25821 states to 25821 states and 26845 transitions. [2022-01-10 00:16:19,983 INFO L78 Accepts]: Start accepts. Automaton has 25821 states and 26845 transitions. Word has length 765 [2022-01-10 00:16:19,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 00:16:19,984 INFO L470 AbstractCegarLoop]: Abstraction has 25821 states and 26845 transitions. [2022-01-10 00:16:19,984 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 105.66666666666667) internal successors, (317), 3 states have internal predecessors, (317), 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 00:16:19,984 INFO L276 IsEmpty]: Start isEmpty. Operand 25821 states and 26845 transitions. [2022-01-10 00:16:19,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 802 [2022-01-10 00:16:19,995 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 00:16:19,995 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 00:16:19,995 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-01-10 00:16:19,995 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 00:16:19,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 00:16:19,996 INFO L85 PathProgramCache]: Analyzing trace with hash -713777869, now seen corresponding path program 1 times [2022-01-10 00:16:19,996 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 00:16:19,996 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [210102538] [2022-01-10 00:16:19,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 00:16:19,996 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 00:16:20,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 00:16:20,270 INFO L134 CoverageAnalysis]: Checked inductivity of 1285 backedges. 922 proven. 0 refuted. 0 times theorem prover too weak. 363 trivial. 0 not checked. [2022-01-10 00:16:20,270 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 00:16:20,270 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [210102538] [2022-01-10 00:16:20,270 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [210102538] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 00:16:20,270 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 00:16:20,270 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 00:16:20,272 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [166264814] [2022-01-10 00:16:20,273 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 00:16:20,274 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-10 00:16:20,275 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 00:16:20,275 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-10 00:16:20,275 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-01-10 00:16:20,275 INFO L87 Difference]: Start difference. First operand 25821 states and 26845 transitions. Second operand has 4 states, 4 states have (on average 136.75) internal successors, (547), 4 states have internal predecessors, (547), 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 00:16:21,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 00:16:21,664 INFO L93 Difference]: Finished difference Result 52829 states and 54928 transitions. [2022-01-10 00:16:21,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-10 00:16:21,664 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 136.75) internal successors, (547), 4 states have internal predecessors, (547), 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 801 [2022-01-10 00:16:21,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 00:16:21,691 INFO L225 Difference]: With dead ends: 52829 [2022-01-10 00:16:21,692 INFO L226 Difference]: Without dead ends: 27309 [2022-01-10 00:16:21,707 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-01-10 00:16:21,708 INFO L933 BasicCegarLoop]: 392 mSDtfsCounter, 587 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 1713 mSolverCounterSat, 137 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 587 SdHoareTripleChecker+Valid, 433 SdHoareTripleChecker+Invalid, 1850 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 137 IncrementalHoareTripleChecker+Valid, 1713 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-01-10 00:16:21,708 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [587 Valid, 433 Invalid, 1850 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [137 Valid, 1713 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-01-10 00:16:21,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27309 states. [2022-01-10 00:16:22,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27309 to 26710. [2022-01-10 00:16:22,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26710 states, 26709 states have (on average 1.0307387023100827) internal successors, (27530), 26709 states have internal predecessors, (27530), 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 00:16:22,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26710 states to 26710 states and 27530 transitions. [2022-01-10 00:16:22,092 INFO L78 Accepts]: Start accepts. Automaton has 26710 states and 27530 transitions. Word has length 801 [2022-01-10 00:16:22,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 00:16:22,092 INFO L470 AbstractCegarLoop]: Abstraction has 26710 states and 27530 transitions. [2022-01-10 00:16:22,092 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 136.75) internal successors, (547), 4 states have internal predecessors, (547), 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 00:16:22,092 INFO L276 IsEmpty]: Start isEmpty. Operand 26710 states and 27530 transitions. [2022-01-10 00:16:22,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 842 [2022-01-10 00:16:22,108 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 00:16:22,108 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 00:16:22,108 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2022-01-10 00:16:22,108 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 00:16:22,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 00:16:22,109 INFO L85 PathProgramCache]: Analyzing trace with hash 1588513965, now seen corresponding path program 1 times [2022-01-10 00:16:22,109 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 00:16:22,109 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1840761176] [2022-01-10 00:16:22,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 00:16:22,109 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 00:16:22,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 00:16:22,410 INFO L134 CoverageAnalysis]: Checked inductivity of 1271 backedges. 481 proven. 522 refuted. 0 times theorem prover too weak. 268 trivial. 0 not checked. [2022-01-10 00:16:22,411 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 00:16:22,411 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1840761176] [2022-01-10 00:16:22,411 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1840761176] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-10 00:16:22,411 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1289998300] [2022-01-10 00:16:22,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 00:16:22,411 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 00:16:22,411 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 00:16:22,428 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-10 00:16:22,429 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-01-10 00:16:22,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 00:16:22,619 INFO L263 TraceCheckSpWp]: Trace formula consists of 1017 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-10 00:16:22,651 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 00:16:23,759 INFO L134 CoverageAnalysis]: Checked inductivity of 1271 backedges. 629 proven. 0 refuted. 0 times theorem prover too weak. 642 trivial. 0 not checked. [2022-01-10 00:16:23,759 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 00:16:23,760 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1289998300] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 00:16:23,760 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-01-10 00:16:23,760 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2022-01-10 00:16:23,760 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1301634237] [2022-01-10 00:16:23,760 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 00:16:23,760 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 00:16:23,761 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 00:16:23,761 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 00:16:23,761 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-01-10 00:16:23,761 INFO L87 Difference]: Start difference. First operand 26710 states and 27530 transitions. Second operand has 3 states, 3 states have (on average 156.0) internal successors, (468), 3 states have internal predecessors, (468), 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 00:16:24,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 00:16:24,750 INFO L93 Difference]: Finished difference Result 52515 states and 54137 transitions. [2022-01-10 00:16:24,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 00:16:24,750 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 156.0) internal successors, (468), 3 states have internal predecessors, (468), 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 841 [2022-01-10 00:16:24,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 00:16:24,773 INFO L225 Difference]: With dead ends: 52515 [2022-01-10 00:16:24,774 INFO L226 Difference]: Without dead ends: 26106 [2022-01-10 00:16:24,787 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 846 GetRequests, 841 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-01-10 00:16:24,788 INFO L933 BasicCegarLoop]: 462 mSDtfsCounter, 176 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 742 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 176 SdHoareTripleChecker+Valid, 498 SdHoareTripleChecker+Invalid, 805 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 742 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-10 00:16:24,788 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [176 Valid, 498 Invalid, 805 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 742 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-10 00:16:24,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26106 states. [2022-01-10 00:16:24,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26106 to 25508. [2022-01-10 00:16:25,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25508 states, 25507 states have (on average 1.0223076018347905) internal successors, (26076), 25507 states have internal predecessors, (26076), 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 00:16:25,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25508 states to 25508 states and 26076 transitions. [2022-01-10 00:16:25,034 INFO L78 Accepts]: Start accepts. Automaton has 25508 states and 26076 transitions. Word has length 841 [2022-01-10 00:16:25,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 00:16:25,035 INFO L470 AbstractCegarLoop]: Abstraction has 25508 states and 26076 transitions. [2022-01-10 00:16:25,035 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 156.0) internal successors, (468), 3 states have internal predecessors, (468), 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 00:16:25,035 INFO L276 IsEmpty]: Start isEmpty. Operand 25508 states and 26076 transitions. [2022-01-10 00:16:25,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 940 [2022-01-10 00:16:25,050 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 00:16:25,050 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 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, 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, 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 00:16:25,068 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-01-10 00:16:25,263 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 00:16:25,263 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 00:16:25,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 00:16:25,264 INFO L85 PathProgramCache]: Analyzing trace with hash 1053481153, now seen corresponding path program 1 times [2022-01-10 00:16:25,264 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 00:16:25,264 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1577790052] [2022-01-10 00:16:25,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 00:16:25,264 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 00:16:25,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 00:16:25,642 INFO L134 CoverageAnalysis]: Checked inductivity of 1199 backedges. 738 proven. 0 refuted. 0 times theorem prover too weak. 461 trivial. 0 not checked. [2022-01-10 00:16:25,642 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 00:16:25,643 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1577790052] [2022-01-10 00:16:25,643 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1577790052] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 00:16:25,643 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 00:16:25,643 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 00:16:25,643 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1245381560] [2022-01-10 00:16:25,643 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 00:16:25,643 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-10 00:16:25,643 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 00:16:25,644 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-10 00:16:25,644 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-01-10 00:16:25,644 INFO L87 Difference]: Start difference. First operand 25508 states and 26076 transitions. Second operand has 4 states, 4 states have (on average 146.5) internal successors, (586), 4 states have internal predecessors, (586), 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 00:16:26,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 00:16:26,866 INFO L93 Difference]: Finished difference Result 54309 states and 55527 transitions. [2022-01-10 00:16:26,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-10 00:16:26,867 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 146.5) internal successors, (586), 4 states have internal predecessors, (586), 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 939 [2022-01-10 00:16:26,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 00:16:26,898 INFO L225 Difference]: With dead ends: 54309 [2022-01-10 00:16:26,899 INFO L226 Difference]: Without dead ends: 29102 [2022-01-10 00:16:26,913 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-01-10 00:16:26,913 INFO L933 BasicCegarLoop]: 108 mSDtfsCounter, 462 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 1114 mSolverCounterSat, 111 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 462 SdHoareTripleChecker+Valid, 147 SdHoareTripleChecker+Invalid, 1225 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 111 IncrementalHoareTripleChecker+Valid, 1114 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-01-10 00:16:26,913 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [462 Valid, 147 Invalid, 1225 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [111 Valid, 1114 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-01-10 00:16:26,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29102 states. [2022-01-10 00:16:27,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29102 to 25209. [2022-01-10 00:16:27,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25209 states, 25208 states have (on average 1.0222151697873691) internal successors, (25768), 25208 states have internal predecessors, (25768), 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 00:16:27,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25209 states to 25209 states and 25768 transitions. [2022-01-10 00:16:27,254 INFO L78 Accepts]: Start accepts. Automaton has 25209 states and 25768 transitions. Word has length 939 [2022-01-10 00:16:27,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 00:16:27,255 INFO L470 AbstractCegarLoop]: Abstraction has 25209 states and 25768 transitions. [2022-01-10 00:16:27,255 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 146.5) internal successors, (586), 4 states have internal predecessors, (586), 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 00:16:27,255 INFO L276 IsEmpty]: Start isEmpty. Operand 25209 states and 25768 transitions. [2022-01-10 00:16:27,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 964 [2022-01-10 00:16:27,270 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 00:16:27,271 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 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, 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] [2022-01-10 00:16:27,271 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2022-01-10 00:16:27,271 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 00:16:27,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 00:16:27,271 INFO L85 PathProgramCache]: Analyzing trace with hash -390225527, now seen corresponding path program 1 times [2022-01-10 00:16:27,271 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 00:16:27,272 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [154081010] [2022-01-10 00:16:27,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 00:16:27,272 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 00:16:27,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 00:16:27,512 INFO L134 CoverageAnalysis]: Checked inductivity of 1364 backedges. 776 proven. 0 refuted. 0 times theorem prover too weak. 588 trivial. 0 not checked. [2022-01-10 00:16:27,512 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 00:16:27,512 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [154081010] [2022-01-10 00:16:27,512 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [154081010] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 00:16:27,512 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 00:16:27,512 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 00:16:27,513 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [237319249] [2022-01-10 00:16:27,513 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 00:16:27,513 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 00:16:27,513 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 00:16:27,513 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 00:16:27,514 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 00:16:27,514 INFO L87 Difference]: Start difference. First operand 25209 states and 25768 transitions. Second operand has 3 states, 3 states have (on average 190.66666666666666) internal successors, (572), 3 states have internal predecessors, (572), 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 00:16:28,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 00:16:28,566 INFO L93 Difference]: Finished difference Result 52515 states and 53676 transitions. [2022-01-10 00:16:28,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 00:16:28,567 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 190.66666666666666) internal successors, (572), 3 states have internal predecessors, (572), 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 963 [2022-01-10 00:16:28,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 00:16:28,594 INFO L225 Difference]: With dead ends: 52515 [2022-01-10 00:16:28,594 INFO L226 Difference]: Without dead ends: 27607 [2022-01-10 00:16:28,605 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 00:16:28,605 INFO L933 BasicCegarLoop]: 145 mSDtfsCounter, 64 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 779 mSolverCounterSat, 78 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 174 SdHoareTripleChecker+Invalid, 857 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 78 IncrementalHoareTripleChecker+Valid, 779 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-10 00:16:28,606 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [64 Valid, 174 Invalid, 857 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [78 Valid, 779 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-10 00:16:28,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27607 states. [2022-01-10 00:16:28,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27607 to 25208. [2022-01-10 00:16:28,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25208 states, 25207 states have (on average 1.0211052485420717) internal successors, (25739), 25207 states have internal predecessors, (25739), 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 00:16:28,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25208 states to 25208 states and 25739 transitions. [2022-01-10 00:16:28,911 INFO L78 Accepts]: Start accepts. Automaton has 25208 states and 25739 transitions. Word has length 963 [2022-01-10 00:16:28,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 00:16:28,911 INFO L470 AbstractCegarLoop]: Abstraction has 25208 states and 25739 transitions. [2022-01-10 00:16:28,911 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 190.66666666666666) internal successors, (572), 3 states have internal predecessors, (572), 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 00:16:28,911 INFO L276 IsEmpty]: Start isEmpty. Operand 25208 states and 25739 transitions. [2022-01-10 00:16:28,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1009 [2022-01-10 00:16:28,930 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 00:16:28,931 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 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] [2022-01-10 00:16:28,931 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2022-01-10 00:16:28,931 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 00:16:28,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 00:16:28,931 INFO L85 PathProgramCache]: Analyzing trace with hash 731241581, now seen corresponding path program 1 times [2022-01-10 00:16:28,931 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 00:16:28,931 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [332874718] [2022-01-10 00:16:28,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 00:16:28,932 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 00:16:29,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 00:16:29,282 INFO L134 CoverageAnalysis]: Checked inductivity of 1454 backedges. 115 proven. 706 refuted. 0 times theorem prover too weak. 633 trivial. 0 not checked. [2022-01-10 00:16:29,282 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 00:16:29,282 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [332874718] [2022-01-10 00:16:29,283 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [332874718] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-10 00:16:29,283 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1939806291] [2022-01-10 00:16:29,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 00:16:29,283 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 00:16:29,283 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 00:16:29,284 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-10 00:16:29,285 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-01-10 00:16:29,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 00:16:29,594 INFO L263 TraceCheckSpWp]: Trace formula consists of 1161 conjuncts, 5 conjunts are in the unsatisfiable core [2022-01-10 00:16:29,600 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 00:16:30,970 INFO L134 CoverageAnalysis]: Checked inductivity of 1454 backedges. 29 proven. 792 refuted. 0 times theorem prover too weak. 633 trivial. 0 not checked. [2022-01-10 00:16:30,970 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 00:16:32,772 INFO L134 CoverageAnalysis]: Checked inductivity of 1454 backedges. 115 proven. 706 refuted. 0 times theorem prover too weak. 633 trivial. 0 not checked. [2022-01-10 00:16:32,772 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1939806291] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 00:16:32,772 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-10 00:16:32,773 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 10 [2022-01-10 00:16:32,773 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [672752887] [2022-01-10 00:16:32,773 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-10 00:16:32,774 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-01-10 00:16:32,774 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 00:16:32,775 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-01-10 00:16:32,775 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=57, Unknown=0, NotChecked=0, Total=110 [2022-01-10 00:16:32,775 INFO L87 Difference]: Start difference. First operand 25208 states and 25739 transitions. Second operand has 11 states, 11 states have (on average 155.8181818181818) internal successors, (1714), 10 states have internal predecessors, (1714), 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 00:16:36,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 00:16:36,276 INFO L93 Difference]: Finished difference Result 65104 states and 66482 transitions. [2022-01-10 00:16:36,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-10 00:16:36,277 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 155.8181818181818) internal successors, (1714), 10 states have internal predecessors, (1714), 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 1008 [2022-01-10 00:16:36,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 00:16:36,315 INFO L225 Difference]: With dead ends: 65104 [2022-01-10 00:16:36,316 INFO L226 Difference]: Without dead ends: 40197 [2022-01-10 00:16:36,329 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2018 GetRequests, 2009 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=53, Invalid=57, Unknown=0, NotChecked=0, Total=110 [2022-01-10 00:16:36,329 INFO L933 BasicCegarLoop]: 66 mSDtfsCounter, 1245 mSDsluCounter, 159 mSDsCounter, 0 mSdLazyCounter, 4741 mSolverCounterSat, 257 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1245 SdHoareTripleChecker+Valid, 225 SdHoareTripleChecker+Invalid, 4998 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 257 IncrementalHoareTripleChecker+Valid, 4741 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2022-01-10 00:16:36,330 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1245 Valid, 225 Invalid, 4998 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [257 Valid, 4741 Invalid, 0 Unknown, 0 Unchecked, 3.2s Time] [2022-01-10 00:16:36,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40197 states. [2022-01-10 00:16:36,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40197 to 24909. [2022-01-10 00:16:36,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24909 states, 24908 states have (on average 1.020916974466035) internal successors, (25429), 24908 states have internal predecessors, (25429), 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 00:16:36,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24909 states to 24909 states and 25429 transitions. [2022-01-10 00:16:36,639 INFO L78 Accepts]: Start accepts. Automaton has 24909 states and 25429 transitions. Word has length 1008 [2022-01-10 00:16:36,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 00:16:36,640 INFO L470 AbstractCegarLoop]: Abstraction has 24909 states and 25429 transitions. [2022-01-10 00:16:36,640 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 155.8181818181818) internal successors, (1714), 10 states have internal predecessors, (1714), 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 00:16:36,640 INFO L276 IsEmpty]: Start isEmpty. Operand 24909 states and 25429 transitions. [2022-01-10 00:16:36,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1123 [2022-01-10 00:16:36,661 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 00:16:36,661 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 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, 1, 1, 1, 1, 1, 1, 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 00:16:36,684 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-01-10 00:16:36,875 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 00:16:36,876 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 00:16:36,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 00:16:36,876 INFO L85 PathProgramCache]: Analyzing trace with hash -1144808352, now seen corresponding path program 1 times [2022-01-10 00:16:36,876 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 00:16:36,876 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [546406168] [2022-01-10 00:16:36,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 00:16:36,876 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 00:16:37,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 00:16:37,311 INFO L134 CoverageAnalysis]: Checked inductivity of 2581 backedges. 1474 proven. 0 refuted. 0 times theorem prover too weak. 1107 trivial. 0 not checked. [2022-01-10 00:16:37,311 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 00:16:37,311 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [546406168] [2022-01-10 00:16:37,311 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [546406168] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 00:16:37,312 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 00:16:37,312 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 00:16:37,312 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1913989043] [2022-01-10 00:16:37,312 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 00:16:37,312 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 00:16:37,312 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 00:16:37,313 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 00:16:37,313 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 00:16:37,313 INFO L87 Difference]: Start difference. First operand 24909 states and 25429 transitions. Second operand has 3 states, 3 states have (on average 160.33333333333334) internal successors, (481), 3 states have internal predecessors, (481), 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)