/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/seq-mthreaded-reduced/pals_floodmax.3.4.ufo.BOUNDED-6.pals.c.v+nlh-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-a10ec3b [2022-01-10 01:24:26,729 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-10 01:24:26,731 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-10 01:24:26,778 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-01-10 01:24:26,850 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-01-10 01:24:26,851 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-01-10 01:24:26,851 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-01-10 01:24:26,854 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 01:24:26,878 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-10 01:24:26,878 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-10 01:24:26,879 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-01-10 01:24:26,879 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-01-10 01:24:26,879 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-01-10 01:24:26,880 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-01-10 01:24:26,880 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-01-10 01:24:26,880 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-01-10 01:24:26,880 INFO L138 SettingsManager]: * Use SBE=true [2022-01-10 01:24:26,880 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-10 01:24:26,881 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-10 01:24:26,881 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-10 01:24:26,881 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-10 01:24:26,881 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-10 01:24:26,881 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-10 01:24:26,881 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-01-10 01:24:26,881 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-10 01:24:26,881 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-10 01:24:26,881 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-10 01:24:26,882 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-10 01:24:26,882 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-10 01:24:26,882 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-10 01:24:26,882 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-10 01:24:26,882 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-01-10 01:24:26,882 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-01-10 01:24:26,882 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-01-10 01:24:26,882 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-01-10 01:24:26,883 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-01-10 01:24:26,883 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-01-10 01:24:26,883 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-01-10 01:24:26,883 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-01-10 01:24:27,087 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-10 01:24:27,114 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-10 01:24:27,118 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-10 01:24:27,119 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-10 01:24:27,119 INFO L275 PluginConnector]: CDTParser initialized [2022-01-10 01:24:27,121 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_floodmax.3.4.ufo.BOUNDED-6.pals.c.v+nlh-reducer.c [2022-01-10 01:24:27,172 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ec06056f0/9afe46f3cba5408ca8b7fe2becd872b6/FLAG8c74bff1e [2022-01-10 01:24:27,596 INFO L306 CDTParser]: Found 1 translation units. [2022-01-10 01:24:27,596 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/seq-mthreaded-reduced/pals_floodmax.3.4.ufo.BOUNDED-6.pals.c.v+nlh-reducer.c [2022-01-10 01:24:27,609 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ec06056f0/9afe46f3cba5408ca8b7fe2becd872b6/FLAG8c74bff1e [2022-01-10 01:24:27,621 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ec06056f0/9afe46f3cba5408ca8b7fe2becd872b6 [2022-01-10 01:24:27,625 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-10 01:24:27,626 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-01-10 01:24:27,631 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-10 01:24:27,631 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-10 01:24:27,634 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-10 01:24:27,635 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.01 01:24:27" (1/1) ... [2022-01-10 01:24:27,636 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@774f15a2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 01:24:27, skipping insertion in model container [2022-01-10 01:24:27,636 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.01 01:24:27" (1/1) ... [2022-01-10 01:24:27,641 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-10 01:24:27,697 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-10 01:24:27,943 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/seq-mthreaded-reduced/pals_floodmax.3.4.ufo.BOUNDED-6.pals.c.v+nlh-reducer.c[14145,14158] [2022-01-10 01:24:27,998 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-10 01:24:28,010 INFO L203 MainTranslator]: Completed pre-run [2022-01-10 01:24:28,110 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/seq-mthreaded-reduced/pals_floodmax.3.4.ufo.BOUNDED-6.pals.c.v+nlh-reducer.c[14145,14158] [2022-01-10 01:24:28,146 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-10 01:24:28,161 INFO L208 MainTranslator]: Completed translation [2022-01-10 01:24:28,162 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 01:24:28 WrapperNode [2022-01-10 01:24:28,162 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-10 01:24:28,163 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-01-10 01:24:28,163 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-01-10 01:24:28,163 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-01-10 01:24:28,169 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 01:24:28" (1/1) ... [2022-01-10 01:24:28,184 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 01:24:28" (1/1) ... [2022-01-10 01:24:28,235 INFO L137 Inliner]: procedures = 22, calls = 7, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 1157 [2022-01-10 01:24:28,236 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-01-10 01:24:28,237 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-10 01:24:28,237 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-10 01:24:28,237 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-10 01:24:28,244 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 01:24:28" (1/1) ... [2022-01-10 01:24:28,245 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 01:24:28" (1/1) ... [2022-01-10 01:24:28,250 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 01:24:28" (1/1) ... [2022-01-10 01:24:28,250 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 01:24:28" (1/1) ... [2022-01-10 01:24:28,263 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 01:24:28" (1/1) ... [2022-01-10 01:24:28,280 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 01:24:28" (1/1) ... [2022-01-10 01:24:28,283 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 01:24:28" (1/1) ... [2022-01-10 01:24:28,288 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-10 01:24:28,289 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-10 01:24:28,289 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-10 01:24:28,289 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-10 01:24:28,290 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 01:24:28" (1/1) ... [2022-01-10 01:24:28,304 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-10 01:24:28,315 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 01:24:28,332 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 01:24:28,355 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 01:24:28,375 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-10 01:24:28,376 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-01-10 01:24:28,377 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-10 01:24:28,377 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-10 01:24:28,510 INFO L234 CfgBuilder]: Building ICFG [2022-01-10 01:24:28,511 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-10 01:24:29,407 INFO L275 CfgBuilder]: Performing block encoding [2022-01-10 01:24:29,417 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-10 01:24:29,417 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2022-01-10 01:24:29,419 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 01:24:29 BoogieIcfgContainer [2022-01-10 01:24:29,419 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-10 01:24:29,421 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-10 01:24:29,421 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-10 01:24:29,427 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-10 01:24:29,427 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 10.01 01:24:27" (1/3) ... [2022-01-10 01:24:29,428 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5ad77cf4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.01 01:24:29, skipping insertion in model container [2022-01-10 01:24:29,428 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 01:24:28" (2/3) ... [2022-01-10 01:24:29,428 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5ad77cf4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.01 01:24:29, skipping insertion in model container [2022-01-10 01:24:29,428 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 01:24:29" (3/3) ... [2022-01-10 01:24:29,430 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_floodmax.3.4.ufo.BOUNDED-6.pals.c.v+nlh-reducer.c [2022-01-10 01:24:29,434 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-01-10 01:24:29,434 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-10 01:24:29,485 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-10 01:24:29,491 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 01:24:29,492 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-01-10 01:24:29,509 INFO L276 IsEmpty]: Start isEmpty. Operand has 294 states, 292 states have (on average 1.7945205479452055) internal successors, (524), 293 states have internal predecessors, (524), 0 states have call successors, (0), 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 01:24:29,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2022-01-10 01:24:29,520 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 01:24:29,520 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:24:29,521 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 01:24:29,526 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 01:24:29,526 INFO L85 PathProgramCache]: Analyzing trace with hash -37487086, now seen corresponding path program 1 times [2022-01-10 01:24:29,533 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 01:24:29,534 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1990545434] [2022-01-10 01:24:29,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 01:24:29,535 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 01:24:29,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 01:24:30,021 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 01:24:30,022 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 01:24:30,022 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1990545434] [2022-01-10 01:24:30,023 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1990545434] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 01:24:30,023 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 01:24:30,023 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 01:24:30,025 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2071890040] [2022-01-10 01:24:30,025 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 01:24:30,029 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 01:24:30,030 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 01:24:30,062 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 01:24:30,064 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 01:24:30,067 INFO L87 Difference]: Start difference. First operand has 294 states, 292 states have (on average 1.7945205479452055) internal successors, (524), 293 states have internal predecessors, (524), 0 states have call successors, (0), 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 47.0) internal successors, (141), 3 states have internal predecessors, (141), 0 states have call successors, (0), 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 01:24:30,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 01:24:30,211 INFO L93 Difference]: Finished difference Result 590 states and 1044 transitions. [2022-01-10 01:24:30,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 01:24:30,214 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 47.0) internal successors, (141), 3 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 141 [2022-01-10 01:24:30,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 01:24:30,226 INFO L225 Difference]: With dead ends: 590 [2022-01-10 01:24:30,226 INFO L226 Difference]: Without dead ends: 473 [2022-01-10 01:24:30,229 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 01:24:30,235 INFO L933 BasicCegarLoop]: 499 mSDtfsCounter, 347 mSDsluCounter, 374 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 347 SdHoareTripleChecker+Valid, 873 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 01:24:30,236 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [347 Valid, 873 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-10 01:24:30,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 473 states. [2022-01-10 01:24:30,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 473 to 471. [2022-01-10 01:24:30,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 471 states, 470 states have (on average 1.4936170212765958) internal successors, (702), 470 states have internal predecessors, (702), 0 states have call successors, (0), 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 01:24:30,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 471 states to 471 states and 702 transitions. [2022-01-10 01:24:30,332 INFO L78 Accepts]: Start accepts. Automaton has 471 states and 702 transitions. Word has length 141 [2022-01-10 01:24:30,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 01:24:30,333 INFO L470 AbstractCegarLoop]: Abstraction has 471 states and 702 transitions. [2022-01-10 01:24:30,334 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 47.0) internal successors, (141), 3 states have internal predecessors, (141), 0 states have call successors, (0), 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 01:24:30,335 INFO L276 IsEmpty]: Start isEmpty. Operand 471 states and 702 transitions. [2022-01-10 01:24:30,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2022-01-10 01:24:30,342 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 01:24:30,343 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:24:30,343 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-01-10 01:24:30,343 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 01:24:30,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 01:24:30,345 INFO L85 PathProgramCache]: Analyzing trace with hash -106858572, now seen corresponding path program 1 times [2022-01-10 01:24:30,346 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 01:24:30,346 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [111942302] [2022-01-10 01:24:30,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 01:24:30,346 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 01:24:30,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 01:24:30,625 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 01:24:30,625 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 01:24:30,626 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [111942302] [2022-01-10 01:24:30,626 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [111942302] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 01:24:30,626 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 01:24:30,626 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 01:24:30,627 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [599386660] [2022-01-10 01:24:30,627 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 01:24:30,629 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-10 01:24:30,629 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 01:24:30,630 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-10 01:24:30,630 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-10 01:24:30,631 INFO L87 Difference]: Start difference. First operand 471 states and 702 transitions. Second operand has 4 states, 4 states have (on average 35.25) internal successors, (141), 4 states have internal predecessors, (141), 0 states have call successors, (0), 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 01:24:30,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 01:24:30,803 INFO L93 Difference]: Finished difference Result 1380 states and 2051 transitions. [2022-01-10 01:24:30,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-10 01:24:30,804 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 35.25) internal successors, (141), 4 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 141 [2022-01-10 01:24:30,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 01:24:30,809 INFO L225 Difference]: With dead ends: 1380 [2022-01-10 01:24:30,809 INFO L226 Difference]: Without dead ends: 918 [2022-01-10 01:24:30,816 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-01-10 01:24:30,818 INFO L933 BasicCegarLoop]: 733 mSDtfsCounter, 853 mSDsluCounter, 388 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 853 SdHoareTripleChecker+Valid, 1121 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 01:24:30,818 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [853 Valid, 1121 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 01:24:30,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 918 states. [2022-01-10 01:24:30,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 918 to 916. [2022-01-10 01:24:30,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 916 states, 915 states have (on average 1.4775956284153005) internal successors, (1352), 915 states have internal predecessors, (1352), 0 states have call successors, (0), 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 01:24:30,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 916 states to 916 states and 1352 transitions. [2022-01-10 01:24:30,889 INFO L78 Accepts]: Start accepts. Automaton has 916 states and 1352 transitions. Word has length 141 [2022-01-10 01:24:30,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 01:24:30,891 INFO L470 AbstractCegarLoop]: Abstraction has 916 states and 1352 transitions. [2022-01-10 01:24:30,891 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 35.25) internal successors, (141), 4 states have internal predecessors, (141), 0 states have call successors, (0), 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 01:24:30,891 INFO L276 IsEmpty]: Start isEmpty. Operand 916 states and 1352 transitions. [2022-01-10 01:24:30,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2022-01-10 01:24:30,893 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 01:24:30,893 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:24:30,893 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-01-10 01:24:30,893 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 01:24:30,894 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 01:24:30,894 INFO L85 PathProgramCache]: Analyzing trace with hash -1746789024, now seen corresponding path program 1 times [2022-01-10 01:24:30,894 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 01:24:30,894 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [580739410] [2022-01-10 01:24:30,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 01:24:30,895 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 01:24:30,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 01:24:30,964 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 01:24:30,964 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 01:24:30,967 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [580739410] [2022-01-10 01:24:30,968 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [580739410] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 01:24:30,973 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 01:24:30,973 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 01:24:30,974 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [545747330] [2022-01-10 01:24:30,974 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 01:24:30,974 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 01:24:30,975 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 01:24:30,975 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 01:24:30,975 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 01:24:30,976 INFO L87 Difference]: Start difference. First operand 916 states and 1352 transitions. Second operand has 3 states, 3 states have (on average 47.333333333333336) internal successors, (142), 3 states have internal predecessors, (142), 0 states have call successors, (0), 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 01:24:31,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 01:24:31,095 INFO L93 Difference]: Finished difference Result 2710 states and 3994 transitions. [2022-01-10 01:24:31,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 01:24:31,096 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 47.333333333333336) internal successors, (142), 3 states have internal predecessors, (142), 0 states have call successors, (0), 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 142 [2022-01-10 01:24:31,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 01:24:31,102 INFO L225 Difference]: With dead ends: 2710 [2022-01-10 01:24:31,103 INFO L226 Difference]: Without dead ends: 1822 [2022-01-10 01:24:31,104 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 01:24:31,110 INFO L933 BasicCegarLoop]: 838 mSDtfsCounter, 415 mSDsluCounter, 417 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 415 SdHoareTripleChecker+Valid, 1255 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 01:24:31,111 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [415 Valid, 1255 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 01:24:31,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1822 states. [2022-01-10 01:24:31,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1822 to 918. [2022-01-10 01:24:31,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 918 states, 917 states have (on average 1.4765539803707743) internal successors, (1354), 917 states have internal predecessors, (1354), 0 states have call successors, (0), 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 01:24:31,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 918 states to 918 states and 1354 transitions. [2022-01-10 01:24:31,191 INFO L78 Accepts]: Start accepts. Automaton has 918 states and 1354 transitions. Word has length 142 [2022-01-10 01:24:31,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 01:24:31,192 INFO L470 AbstractCegarLoop]: Abstraction has 918 states and 1354 transitions. [2022-01-10 01:24:31,192 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 47.333333333333336) internal successors, (142), 3 states have internal predecessors, (142), 0 states have call successors, (0), 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 01:24:31,192 INFO L276 IsEmpty]: Start isEmpty. Operand 918 states and 1354 transitions. [2022-01-10 01:24:31,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2022-01-10 01:24:31,194 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 01:24:31,194 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:24:31,194 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-01-10 01:24:31,195 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 01:24:31,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 01:24:31,196 INFO L85 PathProgramCache]: Analyzing trace with hash 463094692, now seen corresponding path program 1 times [2022-01-10 01:24:31,196 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 01:24:31,196 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1854743618] [2022-01-10 01:24:31,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 01:24:31,197 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 01:24:31,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 01:24:31,272 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 01:24:31,272 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 01:24:31,272 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1854743618] [2022-01-10 01:24:31,272 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1854743618] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 01:24:31,272 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 01:24:31,273 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 01:24:31,273 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1729621606] [2022-01-10 01:24:31,273 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 01:24:31,273 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 01:24:31,273 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 01:24:31,274 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 01:24:31,274 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 01:24:31,275 INFO L87 Difference]: Start difference. First operand 918 states and 1354 transitions. Second operand has 3 states, 3 states have (on average 47.666666666666664) internal successors, (143), 3 states have internal predecessors, (143), 0 states have call successors, (0), 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 01:24:31,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 01:24:31,472 INFO L93 Difference]: Finished difference Result 2514 states and 3723 transitions. [2022-01-10 01:24:31,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 01:24:31,473 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 47.666666666666664) internal successors, (143), 3 states have internal predecessors, (143), 0 states have call successors, (0), 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 143 [2022-01-10 01:24:31,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 01:24:31,482 INFO L225 Difference]: With dead ends: 2514 [2022-01-10 01:24:31,482 INFO L226 Difference]: Without dead ends: 1774 [2022-01-10 01:24:31,483 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 01:24:31,489 INFO L933 BasicCegarLoop]: 767 mSDtfsCounter, 354 mSDsluCounter, 386 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 354 SdHoareTripleChecker+Valid, 1153 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 01:24:31,490 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [354 Valid, 1153 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 01:24:31,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1774 states. [2022-01-10 01:24:31,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1774 to 1772. [2022-01-10 01:24:31,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1772 states, 1771 states have (on average 1.460756634669678) internal successors, (2587), 1771 states have internal predecessors, (2587), 0 states have call successors, (0), 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 01:24:31,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1772 states to 1772 states and 2587 transitions. [2022-01-10 01:24:31,651 INFO L78 Accepts]: Start accepts. Automaton has 1772 states and 2587 transitions. Word has length 143 [2022-01-10 01:24:31,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 01:24:31,651 INFO L470 AbstractCegarLoop]: Abstraction has 1772 states and 2587 transitions. [2022-01-10 01:24:31,652 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 47.666666666666664) internal successors, (143), 3 states have internal predecessors, (143), 0 states have call successors, (0), 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 01:24:31,652 INFO L276 IsEmpty]: Start isEmpty. Operand 1772 states and 2587 transitions. [2022-01-10 01:24:31,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2022-01-10 01:24:31,654 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 01:24:31,655 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:24:31,655 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-01-10 01:24:31,655 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 01:24:31,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 01:24:31,656 INFO L85 PathProgramCache]: Analyzing trace with hash 2076257255, now seen corresponding path program 1 times [2022-01-10 01:24:31,656 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 01:24:31,656 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1436659178] [2022-01-10 01:24:31,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 01:24:31,656 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 01:24:31,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 01:24:31,841 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 01:24:31,841 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 01:24:31,841 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1436659178] [2022-01-10 01:24:31,841 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1436659178] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 01:24:31,841 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 01:24:31,842 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-10 01:24:31,842 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1160399816] [2022-01-10 01:24:31,842 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 01:24:31,842 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 01:24:31,842 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 01:24:31,843 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 01:24:31,843 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-01-10 01:24:31,843 INFO L87 Difference]: Start difference. First operand 1772 states and 2587 transitions. Second operand has 5 states, 5 states have (on average 28.6) internal successors, (143), 5 states have internal predecessors, (143), 0 states have call successors, (0), 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 01:24:32,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 01:24:32,179 INFO L93 Difference]: Finished difference Result 5046 states and 7368 transitions. [2022-01-10 01:24:32,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-10 01:24:32,180 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 28.6) internal successors, (143), 5 states have internal predecessors, (143), 0 states have call successors, (0), 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 143 [2022-01-10 01:24:32,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 01:24:32,194 INFO L225 Difference]: With dead ends: 5046 [2022-01-10 01:24:32,194 INFO L226 Difference]: Without dead ends: 3288 [2022-01-10 01:24:32,197 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-01-10 01:24:32,198 INFO L933 BasicCegarLoop]: 726 mSDtfsCounter, 1256 mSDsluCounter, 388 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1256 SdHoareTripleChecker+Valid, 1114 SdHoareTripleChecker+Invalid, 53 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 01:24:32,198 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1256 Valid, 1114 Invalid, 53 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 01:24:32,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3288 states. [2022-01-10 01:24:32,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3288 to 3286. [2022-01-10 01:24:32,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3286 states, 3285 states have (on average 1.4487062404870623) internal successors, (4759), 3285 states have internal predecessors, (4759), 0 states have call successors, (0), 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 01:24:32,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3286 states to 3286 states and 4759 transitions. [2022-01-10 01:24:32,517 INFO L78 Accepts]: Start accepts. Automaton has 3286 states and 4759 transitions. Word has length 143 [2022-01-10 01:24:32,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 01:24:32,519 INFO L470 AbstractCegarLoop]: Abstraction has 3286 states and 4759 transitions. [2022-01-10 01:24:32,519 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 28.6) internal successors, (143), 5 states have internal predecessors, (143), 0 states have call successors, (0), 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 01:24:32,519 INFO L276 IsEmpty]: Start isEmpty. Operand 3286 states and 4759 transitions. [2022-01-10 01:24:32,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2022-01-10 01:24:32,524 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 01:24:32,524 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:24:32,524 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-01-10 01:24:32,524 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 01:24:32,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 01:24:32,525 INFO L85 PathProgramCache]: Analyzing trace with hash 407122579, now seen corresponding path program 1 times [2022-01-10 01:24:32,525 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 01:24:32,526 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1896045717] [2022-01-10 01:24:32,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 01:24:32,529 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 01:24:32,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 01:24:32,630 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 01:24:32,630 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 01:24:32,630 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1896045717] [2022-01-10 01:24:32,630 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1896045717] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 01:24:32,631 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 01:24:32,631 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 01:24:32,631 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1514141864] [2022-01-10 01:24:32,631 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 01:24:32,631 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-10 01:24:32,632 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 01:24:32,632 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-10 01:24:32,632 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-10 01:24:32,632 INFO L87 Difference]: Start difference. First operand 3286 states and 4759 transitions. Second operand has 4 states, 4 states have (on average 35.75) internal successors, (143), 4 states have internal predecessors, (143), 0 states have call successors, (0), 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 01:24:33,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 01:24:33,228 INFO L93 Difference]: Finished difference Result 9553 states and 13784 transitions. [2022-01-10 01:24:33,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-10 01:24:33,229 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 35.75) internal successors, (143), 4 states have internal predecessors, (143), 0 states have call successors, (0), 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 143 [2022-01-10 01:24:33,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 01:24:33,250 INFO L225 Difference]: With dead ends: 9553 [2022-01-10 01:24:33,250 INFO L226 Difference]: Without dead ends: 6323 [2022-01-10 01:24:33,258 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-01-10 01:24:33,259 INFO L933 BasicCegarLoop]: 704 mSDtfsCounter, 835 mSDsluCounter, 380 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 835 SdHoareTripleChecker+Valid, 1084 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 01:24:33,259 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [835 Valid, 1084 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 01:24:33,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6323 states. [2022-01-10 01:24:33,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6323 to 6321. [2022-01-10 01:24:33,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6321 states, 6320 states have (on average 1.428006329113924) internal successors, (9025), 6320 states have internal predecessors, (9025), 0 states have call successors, (0), 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 01:24:33,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6321 states to 6321 states and 9025 transitions. [2022-01-10 01:24:33,833 INFO L78 Accepts]: Start accepts. Automaton has 6321 states and 9025 transitions. Word has length 143 [2022-01-10 01:24:33,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 01:24:33,833 INFO L470 AbstractCegarLoop]: Abstraction has 6321 states and 9025 transitions. [2022-01-10 01:24:33,833 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 35.75) internal successors, (143), 4 states have internal predecessors, (143), 0 states have call successors, (0), 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 01:24:33,833 INFO L276 IsEmpty]: Start isEmpty. Operand 6321 states and 9025 transitions. [2022-01-10 01:24:33,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2022-01-10 01:24:33,841 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 01:24:33,841 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:24:33,841 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-01-10 01:24:33,841 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 01:24:33,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 01:24:33,842 INFO L85 PathProgramCache]: Analyzing trace with hash -1881733921, now seen corresponding path program 1 times [2022-01-10 01:24:33,842 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 01:24:33,842 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [63155049] [2022-01-10 01:24:33,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 01:24:33,843 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 01:24:33,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 01:24:33,889 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 01:24:33,889 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 01:24:33,889 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [63155049] [2022-01-10 01:24:33,890 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [63155049] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 01:24:33,890 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 01:24:33,890 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 01:24:33,890 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [871570720] [2022-01-10 01:24:33,890 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 01:24:33,891 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 01:24:33,891 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 01:24:33,891 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 01:24:33,891 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 01:24:33,892 INFO L87 Difference]: Start difference. First operand 6321 states and 9025 transitions. Second operand has 3 states, 3 states have (on average 48.0) internal successors, (144), 3 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 01:24:34,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 01:24:34,768 INFO L93 Difference]: Finished difference Result 18811 states and 26842 transitions. [2022-01-10 01:24:34,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 01:24:34,769 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 48.0) internal successors, (144), 3 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 144 [2022-01-10 01:24:34,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 01:24:34,831 INFO L225 Difference]: With dead ends: 18811 [2022-01-10 01:24:34,831 INFO L226 Difference]: Without dead ends: 12581 [2022-01-10 01:24:34,843 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 01:24:34,845 INFO L933 BasicCegarLoop]: 498 mSDtfsCounter, 401 mSDsluCounter, 417 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 401 SdHoareTripleChecker+Valid, 915 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 01:24:34,845 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [401 Valid, 915 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 01:24:34,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12581 states. [2022-01-10 01:24:35,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12581 to 6331. [2022-01-10 01:24:35,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6331 states, 6330 states have (on average 1.4273301737756714) internal successors, (9035), 6330 states have internal predecessors, (9035), 0 states have call successors, (0), 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 01:24:35,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6331 states to 6331 states and 9035 transitions. [2022-01-10 01:24:35,491 INFO L78 Accepts]: Start accepts. Automaton has 6331 states and 9035 transitions. Word has length 144 [2022-01-10 01:24:35,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 01:24:35,491 INFO L470 AbstractCegarLoop]: Abstraction has 6331 states and 9035 transitions. [2022-01-10 01:24:35,491 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 48.0) internal successors, (144), 3 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 01:24:35,492 INFO L276 IsEmpty]: Start isEmpty. Operand 6331 states and 9035 transitions. [2022-01-10 01:24:35,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2022-01-10 01:24:35,501 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 01:24:35,502 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:24:35,502 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-01-10 01:24:35,502 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 01:24:35,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 01:24:35,503 INFO L85 PathProgramCache]: Analyzing trace with hash 1026353394, now seen corresponding path program 1 times [2022-01-10 01:24:35,503 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 01:24:35,503 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [897617367] [2022-01-10 01:24:35,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 01:24:35,503 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 01:24:35,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 01:24:35,592 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 01:24:35,593 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 01:24:35,593 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [897617367] [2022-01-10 01:24:35,593 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [897617367] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 01:24:35,593 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 01:24:35,593 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 01:24:35,593 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [932729214] [2022-01-10 01:24:35,593 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 01:24:35,594 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-10 01:24:35,594 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 01:24:35,594 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-10 01:24:35,595 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-10 01:24:35,595 INFO L87 Difference]: Start difference. First operand 6331 states and 9035 transitions. Second operand has 4 states, 4 states have (on average 36.25) internal successors, (145), 4 states have internal predecessors, (145), 0 states have call successors, (0), 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 01:24:36,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 01:24:36,647 INFO L93 Difference]: Finished difference Result 17179 states and 24404 transitions. [2022-01-10 01:24:36,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-10 01:24:36,648 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 36.25) internal successors, (145), 4 states have internal predecessors, (145), 0 states have call successors, (0), 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 145 [2022-01-10 01:24:36,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 01:24:36,674 INFO L225 Difference]: With dead ends: 17179 [2022-01-10 01:24:36,674 INFO L226 Difference]: Without dead ends: 10949 [2022-01-10 01:24:36,687 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-01-10 01:24:36,688 INFO L933 BasicCegarLoop]: 691 mSDtfsCounter, 831 mSDsluCounter, 380 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 831 SdHoareTripleChecker+Valid, 1071 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 01:24:36,688 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [831 Valid, 1071 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 01:24:36,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10949 states. [2022-01-10 01:24:37,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10949 to 10947. [2022-01-10 01:24:37,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10947 states, 10946 states have (on average 1.4007856751324685) internal successors, (15333), 10946 states have internal predecessors, (15333), 0 states have call successors, (0), 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 01:24:37,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10947 states to 10947 states and 15333 transitions. [2022-01-10 01:24:37,791 INFO L78 Accepts]: Start accepts. Automaton has 10947 states and 15333 transitions. Word has length 145 [2022-01-10 01:24:37,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 01:24:37,791 INFO L470 AbstractCegarLoop]: Abstraction has 10947 states and 15333 transitions. [2022-01-10 01:24:37,792 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 36.25) internal successors, (145), 4 states have internal predecessors, (145), 0 states have call successors, (0), 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 01:24:37,792 INFO L276 IsEmpty]: Start isEmpty. Operand 10947 states and 15333 transitions. [2022-01-10 01:24:37,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2022-01-10 01:24:37,806 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 01:24:37,806 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:24:37,806 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-01-10 01:24:37,807 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 01:24:37,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 01:24:37,807 INFO L85 PathProgramCache]: Analyzing trace with hash 972165086, now seen corresponding path program 1 times [2022-01-10 01:24:37,807 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 01:24:37,807 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [388334739] [2022-01-10 01:24:37,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 01:24:37,807 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 01:24:37,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 01:24:37,839 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 01:24:37,840 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 01:24:37,840 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [388334739] [2022-01-10 01:24:37,840 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [388334739] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 01:24:37,840 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 01:24:37,840 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 01:24:37,840 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1321867582] [2022-01-10 01:24:37,840 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 01:24:37,841 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 01:24:37,841 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 01:24:37,841 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 01:24:37,841 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 01:24:37,842 INFO L87 Difference]: Start difference. First operand 10947 states and 15333 transitions. Second operand has 3 states, 3 states have (on average 48.666666666666664) internal successors, (146), 3 states have internal predecessors, (146), 0 states have call successors, (0), 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 01:24:39,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 01:24:39,414 INFO L93 Difference]: Finished difference Result 31689 states and 44543 transitions. [2022-01-10 01:24:39,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 01:24:39,415 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 48.666666666666664) internal successors, (146), 3 states have internal predecessors, (146), 0 states have call successors, (0), 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 146 [2022-01-10 01:24:39,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 01:24:39,464 INFO L225 Difference]: With dead ends: 31689 [2022-01-10 01:24:39,464 INFO L226 Difference]: Without dead ends: 21617 [2022-01-10 01:24:39,486 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 01:24:39,487 INFO L933 BasicCegarLoop]: 810 mSDtfsCounter, 387 mSDsluCounter, 417 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 387 SdHoareTripleChecker+Valid, 1227 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 01:24:39,487 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [387 Valid, 1227 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 01:24:39,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21617 states. [2022-01-10 01:24:40,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21617 to 10967. [2022-01-10 01:24:40,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10967 states, 10966 states have (on average 1.4000547145723143) internal successors, (15353), 10966 states have internal predecessors, (15353), 0 states have call successors, (0), 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 01:24:40,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10967 states to 10967 states and 15353 transitions. [2022-01-10 01:24:40,541 INFO L78 Accepts]: Start accepts. Automaton has 10967 states and 15353 transitions. Word has length 146 [2022-01-10 01:24:40,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 01:24:40,541 INFO L470 AbstractCegarLoop]: Abstraction has 10967 states and 15353 transitions. [2022-01-10 01:24:40,542 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 48.666666666666664) internal successors, (146), 3 states have internal predecessors, (146), 0 states have call successors, (0), 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 01:24:40,542 INFO L276 IsEmpty]: Start isEmpty. Operand 10967 states and 15353 transitions. [2022-01-10 01:24:40,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2022-01-10 01:24:40,556 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 01:24:40,556 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:24:40,556 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-01-10 01:24:40,556 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 01:24:40,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 01:24:40,557 INFO L85 PathProgramCache]: Analyzing trace with hash -1548655907, now seen corresponding path program 1 times [2022-01-10 01:24:40,557 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 01:24:40,557 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1876438717] [2022-01-10 01:24:40,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 01:24:40,557 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 01:24:40,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 01:24:40,654 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 01:24:40,654 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 01:24:40,654 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1876438717] [2022-01-10 01:24:40,654 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1876438717] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 01:24:40,654 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 01:24:40,654 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-10 01:24:40,655 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1565689411] [2022-01-10 01:24:40,655 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 01:24:40,655 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 01:24:40,655 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 01:24:40,655 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 01:24:40,656 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-01-10 01:24:40,656 INFO L87 Difference]: Start difference. First operand 10967 states and 15353 transitions. Second operand has 5 states, 5 states have (on average 29.4) internal successors, (147), 5 states have internal predecessors, (147), 0 states have call successors, (0), 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 01:24:41,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 01:24:41,726 INFO L93 Difference]: Finished difference Result 22531 states and 31363 transitions. [2022-01-10 01:24:41,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-10 01:24:41,727 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 29.4) internal successors, (147), 5 states have internal predecessors, (147), 0 states have call successors, (0), 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 147 [2022-01-10 01:24:41,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 01:24:41,751 INFO L225 Difference]: With dead ends: 22531 [2022-01-10 01:24:41,751 INFO L226 Difference]: Without dead ends: 11789 [2022-01-10 01:24:41,770 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-01-10 01:24:41,771 INFO L933 BasicCegarLoop]: 696 mSDtfsCounter, 1231 mSDsluCounter, 380 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1231 SdHoareTripleChecker+Valid, 1076 SdHoareTripleChecker+Invalid, 56 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 01:24:41,771 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1231 Valid, 1076 Invalid, 56 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-10 01:24:41,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11789 states. [2022-01-10 01:24:42,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11789 to 11449. [2022-01-10 01:24:42,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11449 states, 11448 states have (on average 1.3874912648497555) internal successors, (15884), 11448 states have internal predecessors, (15884), 0 states have call successors, (0), 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 01:24:42,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11449 states to 11449 states and 15884 transitions. [2022-01-10 01:24:42,884 INFO L78 Accepts]: Start accepts. Automaton has 11449 states and 15884 transitions. Word has length 147 [2022-01-10 01:24:42,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 01:24:42,885 INFO L470 AbstractCegarLoop]: Abstraction has 11449 states and 15884 transitions. [2022-01-10 01:24:42,885 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 29.4) internal successors, (147), 5 states have internal predecessors, (147), 0 states have call successors, (0), 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 01:24:42,885 INFO L276 IsEmpty]: Start isEmpty. Operand 11449 states and 15884 transitions. [2022-01-10 01:24:42,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2022-01-10 01:24:42,901 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 01:24:42,901 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:24:42,901 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-01-10 01:24:42,902 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 01:24:42,902 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 01:24:42,902 INFO L85 PathProgramCache]: Analyzing trace with hash -1691329839, now seen corresponding path program 1 times [2022-01-10 01:24:42,902 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 01:24:42,902 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [429188386] [2022-01-10 01:24:42,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 01:24:42,903 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 01:24:42,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 01:24:43,004 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 01:24:43,005 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 01:24:43,005 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [429188386] [2022-01-10 01:24:43,005 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [429188386] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 01:24:43,005 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 01:24:43,005 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 01:24:43,005 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [897392563] [2022-01-10 01:24:43,006 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 01:24:43,006 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-10 01:24:43,006 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 01:24:43,007 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-10 01:24:43,007 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-10 01:24:43,007 INFO L87 Difference]: Start difference. First operand 11449 states and 15884 transitions. Second operand has 4 states, 4 states have (on average 36.75) internal successors, (147), 4 states have internal predecessors, (147), 0 states have call successors, (0), 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 01:24:43,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 01:24:43,868 INFO L93 Difference]: Finished difference Result 18605 states and 25810 transitions. [2022-01-10 01:24:43,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-10 01:24:43,869 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 36.75) internal successors, (147), 4 states have internal predecessors, (147), 0 states have call successors, (0), 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 147 [2022-01-10 01:24:43,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 01:24:43,884 INFO L225 Difference]: With dead ends: 18605 [2022-01-10 01:24:43,884 INFO L226 Difference]: Without dead ends: 7328 [2022-01-10 01:24:43,901 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-01-10 01:24:43,902 INFO L933 BasicCegarLoop]: 467 mSDtfsCounter, 65 mSDsluCounter, 839 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 1306 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 01:24:43,902 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [65 Valid, 1306 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 01:24:43,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7328 states. [2022-01-10 01:24:44,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7328 to 7328. [2022-01-10 01:24:44,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7328 states, 7327 states have (on average 1.3816022928893135) internal successors, (10123), 7327 states have internal predecessors, (10123), 0 states have call successors, (0), 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 01:24:44,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7328 states to 7328 states and 10123 transitions. [2022-01-10 01:24:44,771 INFO L78 Accepts]: Start accepts. Automaton has 7328 states and 10123 transitions. Word has length 147 [2022-01-10 01:24:44,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 01:24:44,772 INFO L470 AbstractCegarLoop]: Abstraction has 7328 states and 10123 transitions. [2022-01-10 01:24:44,772 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 36.75) internal successors, (147), 4 states have internal predecessors, (147), 0 states have call successors, (0), 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 01:24:44,772 INFO L276 IsEmpty]: Start isEmpty. Operand 7328 states and 10123 transitions. [2022-01-10 01:24:44,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2022-01-10 01:24:44,780 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 01:24:44,780 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:24:44,781 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-01-10 01:24:44,781 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 01:24:44,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 01:24:44,781 INFO L85 PathProgramCache]: Analyzing trace with hash 477794436, now seen corresponding path program 1 times [2022-01-10 01:24:44,781 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 01:24:44,781 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [222518729] [2022-01-10 01:24:44,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 01:24:44,782 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 01:24:44,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 01:24:44,832 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 01:24:44,832 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 01:24:44,833 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [222518729] [2022-01-10 01:24:44,833 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [222518729] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 01:24:44,833 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 01:24:44,833 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 01:24:44,833 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [819304805] [2022-01-10 01:24:44,833 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 01:24:44,833 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 01:24:44,834 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 01:24:44,834 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 01:24:44,834 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 01:24:44,834 INFO L87 Difference]: Start difference. First operand 7328 states and 10123 transitions. Second operand has 3 states, 3 states have (on average 50.666666666666664) internal successors, (152), 3 states have internal predecessors, (152), 0 states have call successors, (0), 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 01:24:45,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 01:24:45,950 INFO L93 Difference]: Finished difference Result 19761 states and 27537 transitions. [2022-01-10 01:24:45,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 01:24:45,951 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 50.666666666666664) internal successors, (152), 3 states have internal predecessors, (152), 0 states have call successors, (0), 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 152 [2022-01-10 01:24:45,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 01:24:45,972 INFO L225 Difference]: With dead ends: 19761 [2022-01-10 01:24:45,973 INFO L226 Difference]: Without dead ends: 13779 [2022-01-10 01:24:45,983 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 01:24:45,983 INFO L933 BasicCegarLoop]: 793 mSDtfsCounter, 344 mSDsluCounter, 382 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 344 SdHoareTripleChecker+Valid, 1175 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 01:24:45,984 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [344 Valid, 1175 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 01:24:45,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13779 states. [2022-01-10 01:24:47,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13779 to 13777. [2022-01-10 01:24:47,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13777 states, 13776 states have (on average 1.367232868757259) internal successors, (18835), 13776 states have internal predecessors, (18835), 0 states have call successors, (0), 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 01:24:47,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13777 states to 13777 states and 18835 transitions. [2022-01-10 01:24:47,193 INFO L78 Accepts]: Start accepts. Automaton has 13777 states and 18835 transitions. Word has length 152 [2022-01-10 01:24:47,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 01:24:47,194 INFO L470 AbstractCegarLoop]: Abstraction has 13777 states and 18835 transitions. [2022-01-10 01:24:47,194 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 50.666666666666664) internal successors, (152), 3 states have internal predecessors, (152), 0 states have call successors, (0), 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 01:24:47,194 INFO L276 IsEmpty]: Start isEmpty. Operand 13777 states and 18835 transitions. [2022-01-10 01:24:47,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2022-01-10 01:24:47,210 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 01:24:47,211 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:24:47,211 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-01-10 01:24:47,211 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 01:24:47,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 01:24:47,212 INFO L85 PathProgramCache]: Analyzing trace with hash -1506973983, now seen corresponding path program 1 times [2022-01-10 01:24:47,212 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 01:24:47,212 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1680110864] [2022-01-10 01:24:47,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 01:24:47,212 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 01:24:47,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 01:24:47,279 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 01:24:47,279 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 01:24:47,279 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1680110864] [2022-01-10 01:24:47,279 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1680110864] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 01:24:47,279 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 01:24:47,279 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 01:24:47,280 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [438976883] [2022-01-10 01:24:47,280 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 01:24:47,280 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 01:24:47,280 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 01:24:47,280 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 01:24:47,281 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-10 01:24:47,281 INFO L87 Difference]: Start difference. First operand 13777 states and 18835 transitions. Second operand has 5 states, 5 states have (on average 30.4) internal successors, (152), 4 states have internal predecessors, (152), 0 states have call successors, (0), 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 01:24:48,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 01:24:48,563 INFO L93 Difference]: Finished difference Result 26226 states and 36201 transitions. [2022-01-10 01:24:48,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-10 01:24:48,564 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 30.4) internal successors, (152), 4 states have internal predecessors, (152), 0 states have call successors, (0), 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 152 [2022-01-10 01:24:48,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 01:24:48,645 INFO L225 Difference]: With dead ends: 26226 [2022-01-10 01:24:48,645 INFO L226 Difference]: Without dead ends: 13777 [2022-01-10 01:24:48,658 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-01-10 01:24:48,659 INFO L933 BasicCegarLoop]: 317 mSDtfsCounter, 1086 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 105 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1086 SdHoareTripleChecker+Valid, 409 SdHoareTripleChecker+Invalid, 128 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 105 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 01:24:48,659 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1086 Valid, 409 Invalid, 128 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 105 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-10 01:24:48,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13777 states. [2022-01-10 01:24:49,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13777 to 13777. [2022-01-10 01:24:49,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13777 states, 13776 states have (on average 1.3566347270615564) internal successors, (18689), 13776 states have internal predecessors, (18689), 0 states have call successors, (0), 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 01:24:49,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13777 states to 13777 states and 18689 transitions. [2022-01-10 01:24:49,733 INFO L78 Accepts]: Start accepts. Automaton has 13777 states and 18689 transitions. Word has length 152 [2022-01-10 01:24:49,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 01:24:49,734 INFO L470 AbstractCegarLoop]: Abstraction has 13777 states and 18689 transitions. [2022-01-10 01:24:49,734 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 30.4) internal successors, (152), 4 states have internal predecessors, (152), 0 states have call successors, (0), 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 01:24:49,734 INFO L276 IsEmpty]: Start isEmpty. Operand 13777 states and 18689 transitions. [2022-01-10 01:24:49,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2022-01-10 01:24:49,749 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 01:24:49,750 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:24:49,750 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-01-10 01:24:49,750 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 01:24:49,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 01:24:49,751 INFO L85 PathProgramCache]: Analyzing trace with hash 211573798, now seen corresponding path program 1 times [2022-01-10 01:24:49,751 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 01:24:49,751 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1965009165] [2022-01-10 01:24:49,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 01:24:49,751 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 01:24:49,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 01:24:49,913 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 01:24:49,913 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 01:24:49,913 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1965009165] [2022-01-10 01:24:49,913 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1965009165] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 01:24:49,914 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 01:24:49,914 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 01:24:49,914 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [241691596] [2022-01-10 01:24:49,914 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 01:24:49,914 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-10 01:24:49,915 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 01:24:49,915 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-10 01:24:49,915 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-01-10 01:24:49,915 INFO L87 Difference]: Start difference. First operand 13777 states and 18689 transitions. Second operand has 4 states, 4 states have (on average 38.0) internal successors, (152), 4 states have internal predecessors, (152), 0 states have call successors, (0), 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 01:24:52,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 01:24:52,181 INFO L93 Difference]: Finished difference Result 30332 states and 42929 transitions. [2022-01-10 01:24:52,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-10 01:24:52,181 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 38.0) internal successors, (152), 4 states have internal predecessors, (152), 0 states have call successors, (0), 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 152 [2022-01-10 01:24:52,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 01:24:52,207 INFO L225 Difference]: With dead ends: 30332 [2022-01-10 01:24:52,207 INFO L226 Difference]: Without dead ends: 24358 [2022-01-10 01:24:52,215 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 5 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 01:24:52,216 INFO L933 BasicCegarLoop]: 384 mSDtfsCounter, 774 mSDsluCounter, 378 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 774 SdHoareTripleChecker+Valid, 762 SdHoareTripleChecker+Invalid, 91 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 01:24:52,216 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [774 Valid, 762 Invalid, 91 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 66 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-10 01:24:52,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24358 states. [2022-01-10 01:24:54,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24358 to 24356. [2022-01-10 01:24:54,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24356 states, 24355 states have (on average 1.3745842742763292) internal successors, (33478), 24355 states have internal predecessors, (33478), 0 states have call successors, (0), 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 01:24:54,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24356 states to 24356 states and 33478 transitions. [2022-01-10 01:24:54,396 INFO L78 Accepts]: Start accepts. Automaton has 24356 states and 33478 transitions. Word has length 152 [2022-01-10 01:24:54,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 01:24:54,396 INFO L470 AbstractCegarLoop]: Abstraction has 24356 states and 33478 transitions. [2022-01-10 01:24:54,396 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 38.0) internal successors, (152), 4 states have internal predecessors, (152), 0 states have call successors, (0), 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 01:24:54,396 INFO L276 IsEmpty]: Start isEmpty. Operand 24356 states and 33478 transitions. [2022-01-10 01:24:54,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2022-01-10 01:24:54,414 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 01:24:54,414 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:24:54,414 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-01-10 01:24:54,414 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 01:24:54,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 01:24:54,415 INFO L85 PathProgramCache]: Analyzing trace with hash 256672605, now seen corresponding path program 1 times [2022-01-10 01:24:54,415 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 01:24:54,415 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1294024742] [2022-01-10 01:24:54,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 01:24:54,415 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 01:24:54,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 01:24:54,524 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 01:24:54,525 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 01:24:54,525 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1294024742] [2022-01-10 01:24:54,525 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1294024742] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 01:24:54,525 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 01:24:54,525 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 01:24:54,525 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [165587156] [2022-01-10 01:24:54,525 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 01:24:54,526 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-10 01:24:54,526 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 01:24:54,526 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-10 01:24:54,526 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-10 01:24:54,526 INFO L87 Difference]: Start difference. First operand 24356 states and 33478 transitions. Second operand has 4 states, 4 states have (on average 38.0) internal successors, (152), 4 states have internal predecessors, (152), 0 states have call successors, (0), 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 01:24:56,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 01:24:56,365 INFO L93 Difference]: Finished difference Result 38417 states and 52944 transitions. [2022-01-10 01:24:56,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-10 01:24:56,365 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 38.0) internal successors, (152), 4 states have internal predecessors, (152), 0 states have call successors, (0), 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 152 [2022-01-10 01:24:56,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 01:24:56,388 INFO L225 Difference]: With dead ends: 38417 [2022-01-10 01:24:56,388 INFO L226 Difference]: Without dead ends: 19705 [2022-01-10 01:24:56,400 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-01-10 01:24:56,403 INFO L933 BasicCegarLoop]: 455 mSDtfsCounter, 53 mSDsluCounter, 828 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 1283 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 01:24:56,403 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [53 Valid, 1283 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 01:24:56,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19705 states. [2022-01-10 01:24:58,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19705 to 19705. [2022-01-10 01:24:58,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19705 states, 19704 states have (on average 1.371751928542428) internal successors, (27029), 19704 states have internal predecessors, (27029), 0 states have call successors, (0), 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 01:24:58,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19705 states to 19705 states and 27029 transitions. [2022-01-10 01:24:58,121 INFO L78 Accepts]: Start accepts. Automaton has 19705 states and 27029 transitions. Word has length 152 [2022-01-10 01:24:58,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 01:24:58,121 INFO L470 AbstractCegarLoop]: Abstraction has 19705 states and 27029 transitions. [2022-01-10 01:24:58,121 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 38.0) internal successors, (152), 4 states have internal predecessors, (152), 0 states have call successors, (0), 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 01:24:58,121 INFO L276 IsEmpty]: Start isEmpty. Operand 19705 states and 27029 transitions. [2022-01-10 01:24:58,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2022-01-10 01:24:58,132 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 01:24:58,132 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:24:58,132 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-01-10 01:24:58,132 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 01:24:58,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 01:24:58,133 INFO L85 PathProgramCache]: Analyzing trace with hash -1780029436, now seen corresponding path program 1 times [2022-01-10 01:24:58,133 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 01:24:58,133 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [185324911] [2022-01-10 01:24:58,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 01:24:58,133 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 01:24:58,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 01:24:58,238 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 01:24:58,238 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 01:24:58,238 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [185324911] [2022-01-10 01:24:58,240 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [185324911] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 01:24:58,240 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 01:24:58,240 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-01-10 01:24:58,240 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1223886742] [2022-01-10 01:24:58,240 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 01:24:58,240 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-01-10 01:24:58,241 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 01:24:58,241 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-01-10 01:24:58,241 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-01-10 01:24:58,241 INFO L87 Difference]: Start difference. First operand 19705 states and 27029 transitions. Second operand has 8 states, 8 states have (on average 19.375) internal successors, (155), 7 states have internal predecessors, (155), 0 states have call successors, (0), 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 01:25:04,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 01:25:04,184 INFO L93 Difference]: Finished difference Result 62587 states and 90534 transitions. [2022-01-10 01:25:04,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-10 01:25:04,184 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 19.375) internal successors, (155), 7 states have internal predecessors, (155), 0 states have call successors, (0), 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 155 [2022-01-10 01:25:04,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 01:25:04,254 INFO L225 Difference]: With dead ends: 62587 [2022-01-10 01:25:04,254 INFO L226 Difference]: Without dead ends: 45885 [2022-01-10 01:25:04,278 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=96, Invalid=176, Unknown=0, NotChecked=0, Total=272 [2022-01-10 01:25:04,278 INFO L933 BasicCegarLoop]: 363 mSDtfsCounter, 4437 mSDsluCounter, 762 mSDsCounter, 0 mSdLazyCounter, 315 mSolverCounterSat, 170 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4437 SdHoareTripleChecker+Valid, 1125 SdHoareTripleChecker+Invalid, 485 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 170 IncrementalHoareTripleChecker+Valid, 315 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-10 01:25:04,279 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4437 Valid, 1125 Invalid, 485 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [170 Valid, 315 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-10 01:25:04,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45885 states. [2022-01-10 01:25:07,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45885 to 28647. [2022-01-10 01:25:07,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28647 states, 28646 states have (on average 1.4067932695664316) internal successors, (40299), 28646 states have internal predecessors, (40299), 0 states have call successors, (0), 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 01:25:07,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28647 states to 28647 states and 40299 transitions. [2022-01-10 01:25:07,879 INFO L78 Accepts]: Start accepts. Automaton has 28647 states and 40299 transitions. Word has length 155 [2022-01-10 01:25:07,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 01:25:07,879 INFO L470 AbstractCegarLoop]: Abstraction has 28647 states and 40299 transitions. [2022-01-10 01:25:07,880 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.375) internal successors, (155), 7 states have internal predecessors, (155), 0 states have call successors, (0), 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 01:25:07,880 INFO L276 IsEmpty]: Start isEmpty. Operand 28647 states and 40299 transitions. [2022-01-10 01:25:07,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2022-01-10 01:25:07,892 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 01:25:07,892 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:25:07,892 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-01-10 01:25:07,892 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 01:25:07,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 01:25:07,893 INFO L85 PathProgramCache]: Analyzing trace with hash 1190617374, now seen corresponding path program 1 times [2022-01-10 01:25:07,893 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 01:25:07,893 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [832063755] [2022-01-10 01:25:07,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 01:25:07,893 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 01:25:07,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 01:25:07,997 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 01:25:07,998 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 01:25:07,998 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [832063755] [2022-01-10 01:25:07,998 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [832063755] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 01:25:07,998 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 01:25:07,998 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 01:25:07,998 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [381733030] [2022-01-10 01:25:07,998 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 01:25:07,999 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-10 01:25:07,999 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 01:25:07,999 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-10 01:25:08,000 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-10 01:25:08,000 INFO L87 Difference]: Start difference. First operand 28647 states and 40299 transitions. Second operand has 4 states, 4 states have (on average 38.75) internal successors, (155), 4 states have internal predecessors, (155), 0 states have call successors, (0), 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 01:25:10,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 01:25:10,979 INFO L93 Difference]: Finished difference Result 53288 states and 74933 transitions. [2022-01-10 01:25:10,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-10 01:25:10,980 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 38.75) internal successors, (155), 4 states have internal predecessors, (155), 0 states have call successors, (0), 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 155 [2022-01-10 01:25:10,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 01:25:11,013 INFO L225 Difference]: With dead ends: 53288 [2022-01-10 01:25:11,013 INFO L226 Difference]: Without dead ends: 24699 [2022-01-10 01:25:11,117 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-01-10 01:25:11,118 INFO L933 BasicCegarLoop]: 439 mSDtfsCounter, 43 mSDsluCounter, 809 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 1248 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 01:25:11,118 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [43 Valid, 1248 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 01:25:11,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24699 states. [2022-01-10 01:25:14,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24699 to 24699. [2022-01-10 01:25:14,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24699 states, 24698 states have (on average 1.4052554862741922) internal successors, (34707), 24698 states have internal predecessors, (34707), 0 states have call successors, (0), 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 01:25:14,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24699 states to 24699 states and 34707 transitions. [2022-01-10 01:25:14,224 INFO L78 Accepts]: Start accepts. Automaton has 24699 states and 34707 transitions. Word has length 155 [2022-01-10 01:25:14,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 01:25:14,225 INFO L470 AbstractCegarLoop]: Abstraction has 24699 states and 34707 transitions. [2022-01-10 01:25:14,225 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 38.75) internal successors, (155), 4 states have internal predecessors, (155), 0 states have call successors, (0), 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 01:25:14,225 INFO L276 IsEmpty]: Start isEmpty. Operand 24699 states and 34707 transitions. [2022-01-10 01:25:14,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2022-01-10 01:25:14,235 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 01:25:14,235 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:25:14,235 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-01-10 01:25:14,235 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 01:25:14,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 01:25:14,236 INFO L85 PathProgramCache]: Analyzing trace with hash 1407593907, now seen corresponding path program 1 times [2022-01-10 01:25:14,236 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 01:25:14,236 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [987009425] [2022-01-10 01:25:14,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 01:25:14,236 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 01:25:14,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 01:25:14,353 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 01:25:14,353 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 01:25:14,354 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [987009425] [2022-01-10 01:25:14,354 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [987009425] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 01:25:14,354 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 01:25:14,354 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 01:25:14,354 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [602685941] [2022-01-10 01:25:14,354 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 01:25:14,354 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-10 01:25:14,354 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 01:25:14,355 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-10 01:25:14,355 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-10 01:25:14,355 INFO L87 Difference]: Start difference. First operand 24699 states and 34707 transitions. Second operand has 4 states, 4 states have (on average 40.25) internal successors, (161), 4 states have internal predecessors, (161), 0 states have call successors, (0), 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 01:25:17,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 01:25:17,676 INFO L93 Difference]: Finished difference Result 46270 states and 64938 transitions. [2022-01-10 01:25:17,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-10 01:25:17,676 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 40.25) internal successors, (161), 4 states have internal predecessors, (161), 0 states have call successors, (0), 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 161 [2022-01-10 01:25:17,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 01:25:17,700 INFO L225 Difference]: With dead ends: 46270 [2022-01-10 01:25:17,700 INFO L226 Difference]: Without dead ends: 21835 [2022-01-10 01:25:17,715 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-01-10 01:25:17,716 INFO L933 BasicCegarLoop]: 595 mSDtfsCounter, 862 mSDsluCounter, 351 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 862 SdHoareTripleChecker+Valid, 946 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 01:25:17,716 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [862 Valid, 946 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 01:25:17,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21835 states. [2022-01-10 01:25:20,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21835 to 21763. [2022-01-10 01:25:20,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21763 states, 21762 states have (on average 1.3987684955426891) internal successors, (30440), 21762 states have internal predecessors, (30440), 0 states have call successors, (0), 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 01:25:20,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21763 states to 21763 states and 30440 transitions. [2022-01-10 01:25:20,607 INFO L78 Accepts]: Start accepts. Automaton has 21763 states and 30440 transitions. Word has length 161 [2022-01-10 01:25:20,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 01:25:20,608 INFO L470 AbstractCegarLoop]: Abstraction has 21763 states and 30440 transitions. [2022-01-10 01:25:20,608 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 40.25) internal successors, (161), 4 states have internal predecessors, (161), 0 states have call successors, (0), 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 01:25:20,608 INFO L276 IsEmpty]: Start isEmpty. Operand 21763 states and 30440 transitions. [2022-01-10 01:25:20,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2022-01-10 01:25:20,620 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 01:25:20,620 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:25:20,620 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-01-10 01:25:20,620 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 01:25:20,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 01:25:20,621 INFO L85 PathProgramCache]: Analyzing trace with hash 1801353677, now seen corresponding path program 1 times [2022-01-10 01:25:20,621 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 01:25:20,621 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1789769085] [2022-01-10 01:25:20,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 01:25:20,621 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 01:25:20,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 01:25:20,744 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 01:25:20,744 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 01:25:20,744 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1789769085] [2022-01-10 01:25:20,745 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1789769085] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 01:25:20,745 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 01:25:20,745 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 01:25:20,745 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1186526536] [2022-01-10 01:25:20,747 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 01:25:20,748 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-10 01:25:20,748 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 01:25:20,749 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-10 01:25:20,749 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-10 01:25:20,749 INFO L87 Difference]: Start difference. First operand 21763 states and 30440 transitions. Second operand has 4 states, 4 states have (on average 40.75) internal successors, (163), 4 states have internal predecessors, (163), 0 states have call successors, (0), 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 01:25:23,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 01:25:23,338 INFO L93 Difference]: Finished difference Result 30778 states and 43056 transitions. [2022-01-10 01:25:23,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-10 01:25:23,339 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 40.75) internal successors, (163), 4 states have internal predecessors, (163), 0 states have call successors, (0), 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 163 [2022-01-10 01:25:23,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 01:25:23,358 INFO L225 Difference]: With dead ends: 30778 [2022-01-10 01:25:23,358 INFO L226 Difference]: Without dead ends: 18884 [2022-01-10 01:25:23,365 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-01-10 01:25:23,365 INFO L933 BasicCegarLoop]: 422 mSDtfsCounter, 21 mSDsluCounter, 800 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 1222 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 01:25:23,366 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [21 Valid, 1222 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 01:25:23,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18884 states. [2022-01-10 01:25:25,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18884 to 18884. [2022-01-10 01:25:25,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18884 states, 18883 states have (on average 1.3949584282158556) internal successors, (26341), 18883 states have internal predecessors, (26341), 0 states have call successors, (0), 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 01:25:25,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18884 states to 18884 states and 26341 transitions. [2022-01-10 01:25:25,955 INFO L78 Accepts]: Start accepts. Automaton has 18884 states and 26341 transitions. Word has length 163 [2022-01-10 01:25:25,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 01:25:25,956 INFO L470 AbstractCegarLoop]: Abstraction has 18884 states and 26341 transitions. [2022-01-10 01:25:25,956 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 40.75) internal successors, (163), 4 states have internal predecessors, (163), 0 states have call successors, (0), 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 01:25:25,956 INFO L276 IsEmpty]: Start isEmpty. Operand 18884 states and 26341 transitions. [2022-01-10 01:25:25,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2022-01-10 01:25:25,963 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 01:25:25,963 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:25:25,964 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-01-10 01:25:25,964 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 01:25:25,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 01:25:25,964 INFO L85 PathProgramCache]: Analyzing trace with hash 1487758919, now seen corresponding path program 1 times [2022-01-10 01:25:25,964 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 01:25:25,964 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [175859417] [2022-01-10 01:25:25,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 01:25:25,965 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 01:25:26,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 01:25:26,888 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 01:25:26,888 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 01:25:26,888 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [175859417] [2022-01-10 01:25:26,888 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [175859417] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 01:25:26,889 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 01:25:26,889 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2022-01-10 01:25:26,889 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1709719044] [2022-01-10 01:25:26,889 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 01:25:26,889 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-10 01:25:26,889 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 01:25:26,890 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-10 01:25:26,890 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=369, Unknown=0, NotChecked=0, Total=420 [2022-01-10 01:25:26,890 INFO L87 Difference]: Start difference. First operand 18884 states and 26341 transitions. Second operand has 21 states, 21 states have (on average 8.0) internal successors, (168), 21 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)