/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/AutomizerC.xml -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationQvasr_64.epf -i ../../../trunk/examples/svcomp/loops-crafted-1/nested3-1.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-b030c9e [2022-03-20 19:01:12,257 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-20 19:01:12,258 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-20 19:01:12,316 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-03-20 19:01:12,346 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-03-20 19:01:12,347 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-03-20 19:01:12,351 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-03-20 19:01:12,352 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationQvasr_64.epf [2022-03-20 19:01:12,359 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-20 19:01:12,359 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-20 19:01:12,360 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-20 19:01:12,360 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-20 19:01:12,360 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-20 19:01:12,361 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-20 19:01:12,361 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-20 19:01:12,361 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-20 19:01:12,361 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-20 19:01:12,361 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-20 19:01:12,361 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-20 19:01:12,362 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-20 19:01:12,362 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-20 19:01:12,362 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-03-20 19:01:12,362 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-20 19:01:12,362 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-20 19:01:12,363 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-20 19:01:12,363 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=Craig_NestedInterpolation [2022-03-20 19:01:12,367 INFO L138 SettingsManager]: * Trace refinement strategy=ACCELERATED_INTERPOLATION [2022-03-20 19:01:12,367 INFO L138 SettingsManager]: * Trace refinement strategy used in Accelerated Interpolation=CAMEL [2022-03-20 19:01:12,367 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-03-20 19:01:12,368 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=QVASR [2022-03-20 19:01:12,368 INFO L138 SettingsManager]: * Use separate solver for trace checks=false 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-03-20 19:01:12,598 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-20 19:01:12,621 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-20 19:01:12,623 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-20 19:01:12,623 INFO L271 PluginConnector]: Initializing CDTParser... [2022-03-20 19:01:12,626 INFO L275 PluginConnector]: CDTParser initialized [2022-03-20 19:01:12,627 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops-crafted-1/nested3-1.c [2022-03-20 19:01:12,675 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5c6a6c8c3/8b27ceb1d754441e806b2eec4f517543/FLAG59fdc741d [2022-03-20 19:01:13,057 INFO L306 CDTParser]: Found 1 translation units. [2022-03-20 19:01:13,060 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops-crafted-1/nested3-1.c [2022-03-20 19:01:13,067 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5c6a6c8c3/8b27ceb1d754441e806b2eec4f517543/FLAG59fdc741d [2022-03-20 19:01:13,081 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5c6a6c8c3/8b27ceb1d754441e806b2eec4f517543 [2022-03-20 19:01:13,083 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-20 19:01:13,085 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-03-20 19:01:13,087 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-03-20 19:01:13,087 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-03-20 19:01:13,090 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-03-20 19:01:13,091 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.03 07:01:13" (1/1) ... [2022-03-20 19:01:13,092 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@71ef1634 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 07:01:13, skipping insertion in model container [2022-03-20 19:01:13,092 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.03 07:01:13" (1/1) ... [2022-03-20 19:01:13,098 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-03-20 19:01:13,109 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-03-20 19:01:13,248 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loops-crafted-1/nested3-1.c[321,334] [2022-03-20 19:01:13,269 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-20 19:01:13,277 INFO L203 MainTranslator]: Completed pre-run [2022-03-20 19:01:13,290 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loops-crafted-1/nested3-1.c[321,334] [2022-03-20 19:01:13,298 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-20 19:01:13,308 INFO L208 MainTranslator]: Completed translation [2022-03-20 19:01:13,308 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 07:01:13 WrapperNode [2022-03-20 19:01:13,308 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-03-20 19:01:13,311 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-20 19:01:13,311 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-20 19:01:13,311 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-20 19:01:13,320 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 07:01:13" (1/1) ... [2022-03-20 19:01:13,320 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 07:01:13" (1/1) ... [2022-03-20 19:01:13,326 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 07:01:13" (1/1) ... [2022-03-20 19:01:13,326 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 07:01:13" (1/1) ... [2022-03-20 19:01:13,338 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 07:01:13" (1/1) ... [2022-03-20 19:01:13,343 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 07:01:13" (1/1) ... [2022-03-20 19:01:13,349 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 07:01:13" (1/1) ... [2022-03-20 19:01:13,350 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-20 19:01:13,351 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-20 19:01:13,351 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-20 19:01:13,351 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-20 19:01:13,355 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 07:01:13" (1/1) ... [2022-03-20 19:01:13,360 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-20 19:01:13,369 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 19:01:13,388 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) [2022-03-20 19:01:13,401 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 [2022-03-20 19:01:13,426 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-03-20 19:01:13,426 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-20 19:01:13,426 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-03-20 19:01:13,427 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-03-20 19:01:13,427 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-03-20 19:01:13,427 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-03-20 19:01:13,428 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-03-20 19:01:13,428 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-03-20 19:01:13,428 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-03-20 19:01:13,428 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-03-20 19:01:13,428 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-03-20 19:01:13,428 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-03-20 19:01:13,428 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-03-20 19:01:13,429 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-20 19:01:13,429 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-03-20 19:01:13,430 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-03-20 19:01:13,430 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-03-20 19:01:13,477 INFO L234 CfgBuilder]: Building ICFG [2022-03-20 19:01:13,479 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-20 19:01:13,637 INFO L275 CfgBuilder]: Performing block encoding [2022-03-20 19:01:13,642 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-20 19:01:13,642 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2022-03-20 19:01:13,644 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.03 07:01:13 BoogieIcfgContainer [2022-03-20 19:01:13,644 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-20 19:01:13,645 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-20 19:01:13,645 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-20 19:01:13,648 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-20 19:01:13,648 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.03 07:01:13" (1/3) ... [2022-03-20 19:01:13,649 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@20fb9e2d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.03 07:01:13, skipping insertion in model container [2022-03-20 19:01:13,649 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 07:01:13" (2/3) ... [2022-03-20 19:01:13,649 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@20fb9e2d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.03 07:01:13, skipping insertion in model container [2022-03-20 19:01:13,649 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.03 07:01:13" (3/3) ... [2022-03-20 19:01:13,650 INFO L111 eAbstractionObserver]: Analyzing ICFG nested3-1.c [2022-03-20 19:01:13,654 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2022-03-20 19:01:13,654 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-20 19:01:13,689 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-20 19:01:13,694 INFO L340 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=Craig_NestedInterpolation, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, 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 [2022-03-20 19:01:13,695 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-03-20 19:01:13,721 INFO L276 IsEmpty]: Start isEmpty. Operand has 25 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 16 states have internal predecessors, (23), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-03-20 19:01:13,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-03-20 19:01:13,727 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 19:01:13,727 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 19:01:13,728 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 19:01:13,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 19:01:13,732 INFO L85 PathProgramCache]: Analyzing trace with hash -1794590667, now seen corresponding path program 1 times [2022-03-20 19:01:13,744 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 19:01:13,746 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [203492487] [2022-03-20 19:01:13,759 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 19:01:13,759 INFO L85 PathProgramCache]: Analyzing trace with hash -1794590667, now seen corresponding path program 2 times [2022-03-20 19:01:13,761 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:01:13,762 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1774530558] [2022-03-20 19:01:13,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:01:13,763 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:01:13,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:01:13,910 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 19:01:13,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:01:13,930 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 19:01:13,931 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 19:01:13,931 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1774530558] [2022-03-20 19:01:13,932 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1774530558] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:01:13,932 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:01:13,932 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-20 19:01:13,934 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 19:01:13,935 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [203492487] [2022-03-20 19:01:13,935 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [203492487] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:01:13,935 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:01:13,935 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-20 19:01:13,935 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [444680631] [2022-03-20 19:01:13,936 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 19:01:13,940 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-03-20 19:01:13,940 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 19:01:13,963 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-03-20 19:01:13,964 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-20 19:01:13,966 INFO L87 Difference]: Start difference. First operand has 25 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 16 states have internal predecessors, (23), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Second operand has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 19:01:14,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 19:01:14,029 INFO L93 Difference]: Finished difference Result 44 states and 63 transitions. [2022-03-20 19:01:14,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-03-20 19:01:14,031 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2022-03-20 19:01:14,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 19:01:14,040 INFO L225 Difference]: With dead ends: 44 [2022-03-20 19:01:14,040 INFO L226 Difference]: Without dead ends: 20 [2022-03-20 19:01:14,043 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-20 19:01:14,049 INFO L913 BasicCegarLoop]: 26 mSDtfsCounter, 16 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 19:01:14,050 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 29 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 19:01:14,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2022-03-20 19:01:14,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2022-03-20 19:01:14,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 12 states have (on average 1.3333333333333333) internal successors, (16), 13 states have internal predecessors, (16), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-20 19:01:14,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 24 transitions. [2022-03-20 19:01:14,094 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 24 transitions. Word has length 11 [2022-03-20 19:01:14,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 19:01:14,094 INFO L478 AbstractCegarLoop]: Abstraction has 20 states and 24 transitions. [2022-03-20 19:01:14,096 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 19:01:14,096 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 24 transitions. [2022-03-20 19:01:14,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-03-20 19:01:14,097 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 19:01:14,097 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 19:01:14,097 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-20 19:01:14,098 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 19:01:14,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 19:01:14,099 INFO L85 PathProgramCache]: Analyzing trace with hash -1824143339, now seen corresponding path program 1 times [2022-03-20 19:01:14,099 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 19:01:14,099 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1608101846] [2022-03-20 19:01:14,101 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 19:01:14,102 INFO L85 PathProgramCache]: Analyzing trace with hash -1824143339, now seen corresponding path program 2 times [2022-03-20 19:01:14,102 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:01:14,102 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1722891228] [2022-03-20 19:01:14,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:01:14,103 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:01:14,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:01:14,218 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 19:01:14,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:01:14,235 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 19:01:14,235 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 19:01:14,235 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1722891228] [2022-03-20 19:01:14,235 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1722891228] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:01:14,235 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:01:14,236 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 19:01:14,236 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 19:01:14,236 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1608101846] [2022-03-20 19:01:14,236 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1608101846] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:01:14,236 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:01:14,236 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 19:01:14,237 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [643089337] [2022-03-20 19:01:14,237 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 19:01:14,237 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-20 19:01:14,237 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 19:01:14,238 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-20 19:01:14,238 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-20 19:01:14,238 INFO L87 Difference]: Start difference. First operand 20 states and 24 transitions. Second operand has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 19:01:14,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 19:01:14,311 INFO L93 Difference]: Finished difference Result 34 states and 42 transitions. [2022-03-20 19:01:14,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-20 19:01:14,312 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2022-03-20 19:01:14,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 19:01:14,314 INFO L225 Difference]: With dead ends: 34 [2022-03-20 19:01:14,314 INFO L226 Difference]: Without dead ends: 27 [2022-03-20 19:01:14,314 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-20 19:01:14,316 INFO L913 BasicCegarLoop]: 20 mSDtfsCounter, 26 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 19:01:14,317 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 27 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 19:01:14,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2022-03-20 19:01:14,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 21. [2022-03-20 19:01:14,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 13 states have (on average 1.3076923076923077) internal successors, (17), 14 states have internal predecessors, (17), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-20 19:01:14,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 25 transitions. [2022-03-20 19:01:14,340 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 25 transitions. Word has length 11 [2022-03-20 19:01:14,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 19:01:14,341 INFO L478 AbstractCegarLoop]: Abstraction has 21 states and 25 transitions. [2022-03-20 19:01:14,341 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 19:01:14,341 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 25 transitions. [2022-03-20 19:01:14,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-03-20 19:01:14,342 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 19:01:14,342 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 19:01:14,342 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-03-20 19:01:14,342 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 19:01:14,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 19:01:14,343 INFO L85 PathProgramCache]: Analyzing trace with hash -699512288, now seen corresponding path program 1 times [2022-03-20 19:01:14,343 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 19:01:14,346 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2584382] [2022-03-20 19:01:14,347 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 19:01:14,347 INFO L85 PathProgramCache]: Analyzing trace with hash -699512288, now seen corresponding path program 2 times [2022-03-20 19:01:14,347 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:01:14,348 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [185957506] [2022-03-20 19:01:14,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:01:14,348 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:01:14,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:01:14,430 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 19:01:14,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:01:14,446 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 19:01:14,446 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 19:01:14,446 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [185957506] [2022-03-20 19:01:14,446 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [185957506] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:01:14,446 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:01:14,447 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 19:01:14,447 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 19:01:14,447 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2584382] [2022-03-20 19:01:14,447 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2584382] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:01:14,447 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:01:14,447 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 19:01:14,448 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [747076744] [2022-03-20 19:01:14,448 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 19:01:14,448 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-20 19:01:14,448 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 19:01:14,449 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-20 19:01:14,449 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-20 19:01:14,449 INFO L87 Difference]: Start difference. First operand 21 states and 25 transitions. Second operand has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 19:01:14,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 19:01:14,512 INFO L93 Difference]: Finished difference Result 39 states and 50 transitions. [2022-03-20 19:01:14,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-20 19:01:14,513 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2022-03-20 19:01:14,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 19:01:14,516 INFO L225 Difference]: With dead ends: 39 [2022-03-20 19:01:14,516 INFO L226 Difference]: Without dead ends: 25 [2022-03-20 19:01:14,517 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-20 19:01:14,519 INFO L913 BasicCegarLoop]: 20 mSDtfsCounter, 21 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 19:01:14,523 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 27 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 19:01:14,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2022-03-20 19:01:14,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 22. [2022-03-20 19:01:14,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 14 states have (on average 1.2857142857142858) internal successors, (18), 15 states have internal predecessors, (18), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-20 19:01:14,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 26 transitions. [2022-03-20 19:01:14,536 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 26 transitions. Word has length 12 [2022-03-20 19:01:14,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 19:01:14,537 INFO L478 AbstractCegarLoop]: Abstraction has 22 states and 26 transitions. [2022-03-20 19:01:14,537 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 19:01:14,537 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 26 transitions. [2022-03-20 19:01:14,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-03-20 19:01:14,537 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 19:01:14,538 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 19:01:14,538 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-03-20 19:01:14,540 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 19:01:14,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 19:01:14,540 INFO L85 PathProgramCache]: Analyzing trace with hash -185588926, now seen corresponding path program 1 times [2022-03-20 19:01:14,540 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 19:01:14,543 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [266836475] [2022-03-20 19:01:14,544 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 19:01:14,544 INFO L85 PathProgramCache]: Analyzing trace with hash -185588926, now seen corresponding path program 2 times [2022-03-20 19:01:14,544 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:01:14,544 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1118720437] [2022-03-20 19:01:14,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:01:14,545 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:01:14,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:01:14,610 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 19:01:14,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:01:14,620 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 19:01:14,620 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 19:01:14,620 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1118720437] [2022-03-20 19:01:14,620 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1118720437] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:01:14,620 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:01:14,621 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 19:01:14,621 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 19:01:14,621 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [266836475] [2022-03-20 19:01:14,621 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [266836475] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:01:14,621 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:01:14,621 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 19:01:14,621 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1001749177] [2022-03-20 19:01:14,621 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 19:01:14,622 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-20 19:01:14,622 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 19:01:14,622 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-20 19:01:14,623 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-20 19:01:14,623 INFO L87 Difference]: Start difference. First operand 22 states and 26 transitions. Second operand has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 19:01:14,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 19:01:14,669 INFO L93 Difference]: Finished difference Result 39 states and 48 transitions. [2022-03-20 19:01:14,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-20 19:01:14,670 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 13 [2022-03-20 19:01:14,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 19:01:14,671 INFO L225 Difference]: With dead ends: 39 [2022-03-20 19:01:14,671 INFO L226 Difference]: Without dead ends: 24 [2022-03-20 19:01:14,672 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-20 19:01:14,674 INFO L913 BasicCegarLoop]: 21 mSDtfsCounter, 17 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 19:01:14,675 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 28 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 19:01:14,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2022-03-20 19:01:14,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 23. [2022-03-20 19:01:14,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 15 states have (on average 1.2666666666666666) internal successors, (19), 16 states have internal predecessors, (19), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-20 19:01:14,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 27 transitions. [2022-03-20 19:01:14,684 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 27 transitions. Word has length 13 [2022-03-20 19:01:14,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 19:01:14,684 INFO L478 AbstractCegarLoop]: Abstraction has 23 states and 27 transitions. [2022-03-20 19:01:14,684 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 19:01:14,685 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 27 transitions. [2022-03-20 19:01:14,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-03-20 19:01:14,685 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 19:01:14,686 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 19:01:14,686 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-03-20 19:01:14,686 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 19:01:14,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 19:01:14,686 INFO L85 PathProgramCache]: Analyzing trace with hash -1431986846, now seen corresponding path program 1 times [2022-03-20 19:01:14,686 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 19:01:14,686 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1595999693] [2022-03-20 19:01:14,765 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 19:01:14,771 INFO L85 PathProgramCache]: Analyzing trace with hash -278509117, now seen corresponding path program 1 times [2022-03-20 19:01:14,771 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:01:14,772 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2118069823] [2022-03-20 19:01:14,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:01:14,773 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:01:14,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:01:14,996 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 19:01:14,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:01:15,004 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 19:01:15,005 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 19:01:15,005 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2118069823] [2022-03-20 19:01:15,005 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2118069823] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:01:15,005 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:01:15,005 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-03-20 19:01:15,094 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 19:01:15,094 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1595999693] [2022-03-20 19:01:15,094 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1595999693] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:01:15,094 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:01:15,095 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-03-20 19:01:15,095 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [773101003] [2022-03-20 19:01:15,095 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 19:01:15,095 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-20 19:01:15,095 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 19:01:15,095 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-20 19:01:15,096 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2022-03-20 19:01:15,096 INFO L87 Difference]: Start difference. First operand 23 states and 27 transitions. Second operand has 8 states, 7 states have (on average 1.4285714285714286) internal successors, (10), 6 states have internal predecessors, (10), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 19:01:15,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 19:01:15,335 INFO L93 Difference]: Finished difference Result 30 states and 33 transitions. [2022-03-20 19:01:15,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-20 19:01:15,336 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 1.4285714285714286) internal successors, (10), 6 states have internal predecessors, (10), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 14 [2022-03-20 19:01:15,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 19:01:15,336 INFO L225 Difference]: With dead ends: 30 [2022-03-20 19:01:15,336 INFO L226 Difference]: Without dead ends: 28 [2022-03-20 19:01:15,337 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2022-03-20 19:01:15,337 INFO L913 BasicCegarLoop]: 20 mSDtfsCounter, 35 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 95 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 109 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 95 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 19:01:15,337 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [35 Valid, 47 Invalid, 109 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 95 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 19:01:15,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2022-03-20 19:01:15,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 27. [2022-03-20 19:01:15,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 18 states have (on average 1.2222222222222223) internal successors, (22), 19 states have internal predecessors, (22), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-20 19:01:15,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 30 transitions. [2022-03-20 19:01:15,345 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 30 transitions. Word has length 14 [2022-03-20 19:01:15,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 19:01:15,345 INFO L478 AbstractCegarLoop]: Abstraction has 27 states and 30 transitions. [2022-03-20 19:01:15,346 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 1.4285714285714286) internal successors, (10), 6 states have internal predecessors, (10), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 19:01:15,346 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 30 transitions. [2022-03-20 19:01:15,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-03-20 19:01:15,346 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 19:01:15,346 INFO L499 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 19:01:15,346 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-03-20 19:01:15,347 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 19:01:15,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 19:01:15,347 INFO L85 PathProgramCache]: Analyzing trace with hash -413054462, now seen corresponding path program 1 times [2022-03-20 19:01:15,347 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 19:01:15,347 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1682755966] [2022-03-20 19:01:15,570 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 19:01:15,570 INFO L85 PathProgramCache]: Analyzing trace with hash 1284716088, now seen corresponding path program 1 times [2022-03-20 19:01:15,570 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:01:15,570 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [753909741] [2022-03-20 19:01:15,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:01:15,571 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:01:15,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:01:15,605 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 19:01:15,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:01:15,610 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 19:01:15,610 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 19:01:15,610 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [753909741] [2022-03-20 19:01:15,610 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [753909741] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:01:15,611 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:01:15,611 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 19:01:15,649 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 19:01:15,649 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1682755966] [2022-03-20 19:01:15,649 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1682755966] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:01:15,649 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:01:15,649 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-20 19:01:15,649 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [765905165] [2022-03-20 19:01:15,649 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 19:01:15,650 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-20 19:01:15,650 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 19:01:15,650 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-20 19:01:15,650 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-03-20 19:01:15,650 INFO L87 Difference]: Start difference. First operand 27 states and 30 transitions. Second operand has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 19:01:15,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 19:01:15,747 INFO L93 Difference]: Finished difference Result 53 states and 62 transitions. [2022-03-20 19:01:15,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-20 19:01:15,748 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 21 [2022-03-20 19:01:15,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 19:01:15,748 INFO L225 Difference]: With dead ends: 53 [2022-03-20 19:01:15,748 INFO L226 Difference]: Without dead ends: 33 [2022-03-20 19:01:15,749 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2022-03-20 19:01:15,749 INFO L913 BasicCegarLoop]: 19 mSDtfsCounter, 20 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 53 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 19:01:15,750 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 26 Invalid, 53 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 19:01:15,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2022-03-20 19:01:15,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 28. [2022-03-20 19:01:15,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 19 states have (on average 1.2105263157894737) internal successors, (23), 20 states have internal predecessors, (23), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-20 19:01:15,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 31 transitions. [2022-03-20 19:01:15,758 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 31 transitions. Word has length 21 [2022-03-20 19:01:15,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 19:01:15,758 INFO L478 AbstractCegarLoop]: Abstraction has 28 states and 31 transitions. [2022-03-20 19:01:15,758 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 19:01:15,758 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 31 transitions. [2022-03-20 19:01:15,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-20 19:01:15,759 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 19:01:15,759 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 19:01:15,759 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-03-20 19:01:15,759 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 19:01:15,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 19:01:15,760 INFO L85 PathProgramCache]: Analyzing trace with hash 1032496162, now seen corresponding path program 2 times [2022-03-20 19:01:15,760 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 19:01:15,760 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1324840215] [2022-03-20 19:01:15,950 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 19:01:15,951 INFO L85 PathProgramCache]: Analyzing trace with hash 1343821432, now seen corresponding path program 1 times [2022-03-20 19:01:15,951 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:01:15,951 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1128738530] [2022-03-20 19:01:15,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:01:15,951 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:01:15,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:01:16,021 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 19:01:16,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:01:16,027 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 19:01:16,027 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 19:01:16,027 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1128738530] [2022-03-20 19:01:16,028 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1128738530] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:01:16,028 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:01:16,028 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 19:01:16,067 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 19:01:16,067 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1324840215] [2022-03-20 19:01:16,068 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1324840215] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:01:16,068 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:01:16,068 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-03-20 19:01:16,068 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [179801288] [2022-03-20 19:01:16,068 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 19:01:16,069 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-03-20 19:01:16,069 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 19:01:16,069 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-03-20 19:01:16,070 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2022-03-20 19:01:16,070 INFO L87 Difference]: Start difference. First operand 28 states and 31 transitions. Second operand has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 6 states have internal predecessors, (15), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 19:01:16,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 19:01:16,157 INFO L93 Difference]: Finished difference Result 55 states and 64 transitions. [2022-03-20 19:01:16,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-20 19:01:16,158 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 6 states have internal predecessors, (15), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 22 [2022-03-20 19:01:16,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 19:01:16,159 INFO L225 Difference]: With dead ends: 55 [2022-03-20 19:01:16,160 INFO L226 Difference]: Without dead ends: 34 [2022-03-20 19:01:16,160 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2022-03-20 19:01:16,161 INFO L913 BasicCegarLoop]: 19 mSDtfsCounter, 20 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 19:01:16,161 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 26 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 19:01:16,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2022-03-20 19:01:16,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 29. [2022-03-20 19:01:16,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 20 states have (on average 1.2) internal successors, (24), 21 states have internal predecessors, (24), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-20 19:01:16,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 32 transitions. [2022-03-20 19:01:16,172 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 32 transitions. Word has length 22 [2022-03-20 19:01:16,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 19:01:16,173 INFO L478 AbstractCegarLoop]: Abstraction has 29 states and 32 transitions. [2022-03-20 19:01:16,173 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 6 states have internal predecessors, (15), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 19:01:16,173 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 32 transitions. [2022-03-20 19:01:16,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-20 19:01:16,173 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 19:01:16,173 INFO L499 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 19:01:16,173 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-03-20 19:01:16,174 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 19:01:16,178 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 19:01:16,179 INFO L85 PathProgramCache]: Analyzing trace with hash -1400074750, now seen corresponding path program 3 times [2022-03-20 19:01:16,179 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 19:01:16,179 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [858228248] [2022-03-20 19:01:16,347 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 19:01:16,347 INFO L85 PathProgramCache]: Analyzing trace with hash 1402926776, now seen corresponding path program 1 times [2022-03-20 19:01:16,347 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:01:16,348 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [418874846] [2022-03-20 19:01:16,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:01:16,348 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:01:16,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:01:16,393 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 19:01:16,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:01:16,396 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 19:01:16,397 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 19:01:16,397 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [418874846] [2022-03-20 19:01:16,397 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [418874846] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:01:16,397 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:01:16,397 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 19:01:16,460 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 19:01:16,460 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [858228248] [2022-03-20 19:01:16,461 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [858228248] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:01:16,461 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:01:16,461 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-03-20 19:01:16,461 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [478183492] [2022-03-20 19:01:16,461 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 19:01:16,461 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-20 19:01:16,461 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 19:01:16,462 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-20 19:01:16,462 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-03-20 19:01:16,462 INFO L87 Difference]: Start difference. First operand 29 states and 32 transitions. Second operand has 8 states, 8 states have (on average 2.0) internal successors, (16), 7 states have internal predecessors, (16), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 19:01:16,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 19:01:16,592 INFO L93 Difference]: Finished difference Result 57 states and 66 transitions. [2022-03-20 19:01:16,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-20 19:01:16,594 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.0) internal successors, (16), 7 states have internal predecessors, (16), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 23 [2022-03-20 19:01:16,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 19:01:16,594 INFO L225 Difference]: With dead ends: 57 [2022-03-20 19:01:16,594 INFO L226 Difference]: Without dead ends: 35 [2022-03-20 19:01:16,595 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2022-03-20 19:01:16,595 INFO L913 BasicCegarLoop]: 19 mSDtfsCounter, 20 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 101 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 121 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 101 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 19:01:16,596 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 41 Invalid, 121 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 101 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 19:01:16,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2022-03-20 19:01:16,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 30. [2022-03-20 19:01:16,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 21 states have (on average 1.1904761904761905) internal successors, (25), 22 states have internal predecessors, (25), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-20 19:01:16,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 33 transitions. [2022-03-20 19:01:16,604 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 33 transitions. Word has length 23 [2022-03-20 19:01:16,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 19:01:16,604 INFO L478 AbstractCegarLoop]: Abstraction has 30 states and 33 transitions. [2022-03-20 19:01:16,604 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.0) internal successors, (16), 7 states have internal predecessors, (16), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 19:01:16,604 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 33 transitions. [2022-03-20 19:01:16,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-20 19:01:16,605 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 19:01:16,605 INFO L499 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 19:01:16,605 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-03-20 19:01:16,605 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 19:01:16,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 19:01:16,606 INFO L85 PathProgramCache]: Analyzing trace with hash 499638306, now seen corresponding path program 4 times [2022-03-20 19:01:16,606 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 19:01:16,606 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [621914693] [2022-03-20 19:01:16,767 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 19:01:16,768 INFO L85 PathProgramCache]: Analyzing trace with hash 1462032120, now seen corresponding path program 1 times [2022-03-20 19:01:16,768 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:01:16,768 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1529506956] [2022-03-20 19:01:16,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:01:16,768 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:01:16,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:01:16,803 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 19:01:16,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:01:16,812 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 19:01:16,812 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 19:01:16,812 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1529506956] [2022-03-20 19:01:16,812 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1529506956] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:01:16,812 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:01:16,813 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 19:01:16,880 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 19:01:16,880 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [621914693] [2022-03-20 19:01:16,880 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [621914693] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:01:16,880 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:01:16,880 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-03-20 19:01:16,880 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [991251803] [2022-03-20 19:01:16,880 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 19:01:16,881 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-20 19:01:16,881 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 19:01:16,881 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-20 19:01:16,881 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2022-03-20 19:01:16,881 INFO L87 Difference]: Start difference. First operand 30 states and 33 transitions. Second operand has 9 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 8 states have internal predecessors, (17), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 19:01:17,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 19:01:17,034 INFO L93 Difference]: Finished difference Result 59 states and 68 transitions. [2022-03-20 19:01:17,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-20 19:01:17,035 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 8 states have internal predecessors, (17), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 24 [2022-03-20 19:01:17,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 19:01:17,036 INFO L225 Difference]: With dead ends: 59 [2022-03-20 19:01:17,036 INFO L226 Difference]: Without dead ends: 36 [2022-03-20 19:01:17,037 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2022-03-20 19:01:17,039 INFO L913 BasicCegarLoop]: 19 mSDtfsCounter, 20 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 128 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 151 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 128 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 19:01:17,039 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 46 Invalid, 151 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 128 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 19:01:17,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2022-03-20 19:01:17,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 31. [2022-03-20 19:01:17,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 22 states have (on average 1.1818181818181819) internal successors, (26), 23 states have internal predecessors, (26), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-20 19:01:17,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 34 transitions. [2022-03-20 19:01:17,054 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 34 transitions. Word has length 24 [2022-03-20 19:01:17,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 19:01:17,054 INFO L478 AbstractCegarLoop]: Abstraction has 31 states and 34 transitions. [2022-03-20 19:01:17,054 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 8 states have internal predecessors, (17), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 19:01:17,054 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 34 transitions. [2022-03-20 19:01:17,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-03-20 19:01:17,055 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 19:01:17,055 INFO L499 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 19:01:17,055 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-03-20 19:01:17,055 INFO L403 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 19:01:17,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 19:01:17,056 INFO L85 PathProgramCache]: Analyzing trace with hash -738799102, now seen corresponding path program 5 times [2022-03-20 19:01:17,056 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 19:01:17,056 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2107942572] [2022-03-20 19:01:17,201 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 19:01:17,202 INFO L85 PathProgramCache]: Analyzing trace with hash 1521137464, now seen corresponding path program 1 times [2022-03-20 19:01:17,202 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:01:17,202 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [368485193] [2022-03-20 19:01:17,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:01:17,202 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:01:17,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:01:17,293 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 19:01:17,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:01:17,298 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 19:01:17,298 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 19:01:17,298 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [368485193] [2022-03-20 19:01:17,298 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [368485193] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:01:17,298 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:01:17,298 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 19:01:17,368 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 19:01:17,368 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2107942572] [2022-03-20 19:01:17,368 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2107942572] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:01:17,368 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:01:17,368 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-03-20 19:01:17,368 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1353629945] [2022-03-20 19:01:17,369 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 19:01:17,369 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-20 19:01:17,369 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 19:01:17,369 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-20 19:01:17,369 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2022-03-20 19:01:17,369 INFO L87 Difference]: Start difference. First operand 31 states and 34 transitions. Second operand has 10 states, 10 states have (on average 1.8) internal successors, (18), 9 states have internal predecessors, (18), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 19:01:17,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 19:01:17,503 INFO L93 Difference]: Finished difference Result 61 states and 70 transitions. [2022-03-20 19:01:17,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-20 19:01:17,503 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.8) internal successors, (18), 9 states have internal predecessors, (18), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 25 [2022-03-20 19:01:17,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 19:01:17,505 INFO L225 Difference]: With dead ends: 61 [2022-03-20 19:01:17,505 INFO L226 Difference]: Without dead ends: 37 [2022-03-20 19:01:17,508 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2022-03-20 19:01:17,509 INFO L913 BasicCegarLoop]: 19 mSDtfsCounter, 20 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 102 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 127 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 102 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 19:01:17,509 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 31 Invalid, 127 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 102 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 19:01:17,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2022-03-20 19:01:17,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 32. [2022-03-20 19:01:17,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 23 states have (on average 1.173913043478261) internal successors, (27), 24 states have internal predecessors, (27), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-20 19:01:17,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 35 transitions. [2022-03-20 19:01:17,529 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 35 transitions. Word has length 25 [2022-03-20 19:01:17,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 19:01:17,531 INFO L478 AbstractCegarLoop]: Abstraction has 32 states and 35 transitions. [2022-03-20 19:01:17,532 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 1.8) internal successors, (18), 9 states have internal predecessors, (18), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 19:01:17,532 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 35 transitions. [2022-03-20 19:01:17,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-20 19:01:17,534 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 19:01:17,534 INFO L499 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 19:01:17,534 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-03-20 19:01:17,534 INFO L403 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 19:01:17,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 19:01:17,535 INFO L85 PathProgramCache]: Analyzing trace with hash -475653086, now seen corresponding path program 6 times [2022-03-20 19:01:17,535 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 19:01:17,535 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2104830482] [2022-03-20 19:01:17,689 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 19:01:17,689 INFO L85 PathProgramCache]: Analyzing trace with hash 1580242808, now seen corresponding path program 1 times [2022-03-20 19:01:17,689 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:01:17,689 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [190900748] [2022-03-20 19:01:17,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:01:17,690 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:01:17,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:01:17,722 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 19:01:17,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:01:17,726 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 19:01:17,726 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 19:01:17,726 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [190900748] [2022-03-20 19:01:17,726 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [190900748] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:01:17,726 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:01:17,726 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 19:01:17,810 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 19:01:17,810 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2104830482] [2022-03-20 19:01:17,811 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2104830482] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:01:17,811 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:01:17,811 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-03-20 19:01:17,811 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1276326094] [2022-03-20 19:01:17,811 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 19:01:17,811 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-20 19:01:17,811 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 19:01:17,812 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-20 19:01:17,812 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2022-03-20 19:01:17,812 INFO L87 Difference]: Start difference. First operand 32 states and 35 transitions. Second operand has 11 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 10 states have internal predecessors, (19), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 19:01:17,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 19:01:17,993 INFO L93 Difference]: Finished difference Result 63 states and 72 transitions. [2022-03-20 19:01:17,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-20 19:01:17,993 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 10 states have internal predecessors, (19), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 26 [2022-03-20 19:01:17,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 19:01:17,994 INFO L225 Difference]: With dead ends: 63 [2022-03-20 19:01:17,994 INFO L226 Difference]: Without dead ends: 38 [2022-03-20 19:01:17,995 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=72, Invalid=270, Unknown=0, NotChecked=0, Total=342 [2022-03-20 19:01:17,995 INFO L913 BasicCegarLoop]: 19 mSDtfsCounter, 20 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 205 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 231 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 205 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 19:01:17,996 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 61 Invalid, 231 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 205 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 19:01:17,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2022-03-20 19:01:18,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 33. [2022-03-20 19:01:18,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 24 states have (on average 1.1666666666666667) internal successors, (28), 25 states have internal predecessors, (28), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-20 19:01:18,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 36 transitions. [2022-03-20 19:01:18,007 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 36 transitions. Word has length 26 [2022-03-20 19:01:18,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 19:01:18,007 INFO L478 AbstractCegarLoop]: Abstraction has 33 states and 36 transitions. [2022-03-20 19:01:18,007 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 10 states have internal predecessors, (19), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 19:01:18,008 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 36 transitions. [2022-03-20 19:01:18,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-03-20 19:01:18,012 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 19:01:18,013 INFO L499 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 19:01:18,013 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-03-20 19:01:18,013 INFO L403 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 19:01:18,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 19:01:18,013 INFO L85 PathProgramCache]: Analyzing trace with hash -908061182, now seen corresponding path program 7 times [2022-03-20 19:01:18,013 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 19:01:18,013 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1049242469] [2022-03-20 19:01:18,159 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 19:01:18,160 INFO L85 PathProgramCache]: Analyzing trace with hash 1639348152, now seen corresponding path program 1 times [2022-03-20 19:01:18,160 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:01:18,160 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [359284231] [2022-03-20 19:01:18,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:01:18,161 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:01:18,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:01:18,198 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 19:01:18,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:01:18,204 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 19:01:18,205 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 19:01:18,205 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [359284231] [2022-03-20 19:01:18,205 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [359284231] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:01:18,205 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:01:18,205 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 19:01:18,310 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 19:01:18,311 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1049242469] [2022-03-20 19:01:18,311 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1049242469] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:01:18,311 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:01:18,311 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-03-20 19:01:18,311 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1419440129] [2022-03-20 19:01:18,311 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 19:01:18,312 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-20 19:01:18,312 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 19:01:18,312 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-20 19:01:18,312 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2022-03-20 19:01:18,312 INFO L87 Difference]: Start difference. First operand 33 states and 36 transitions. Second operand has 12 states, 12 states have (on average 1.6666666666666667) internal successors, (20), 11 states have internal predecessors, (20), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 19:01:18,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 19:01:18,486 INFO L93 Difference]: Finished difference Result 65 states and 74 transitions. [2022-03-20 19:01:18,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-20 19:01:18,487 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.6666666666666667) internal successors, (20), 11 states have internal predecessors, (20), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 27 [2022-03-20 19:01:18,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 19:01:18,487 INFO L225 Difference]: With dead ends: 65 [2022-03-20 19:01:18,487 INFO L226 Difference]: Without dead ends: 39 [2022-03-20 19:01:18,488 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=81, Invalid=339, Unknown=0, NotChecked=0, Total=420 [2022-03-20 19:01:18,488 INFO L913 BasicCegarLoop]: 19 mSDtfsCounter, 20 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 140 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 169 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 140 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 19:01:18,489 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 31 Invalid, 169 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 140 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 19:01:18,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2022-03-20 19:01:18,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 34. [2022-03-20 19:01:18,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 25 states have (on average 1.16) internal successors, (29), 26 states have internal predecessors, (29), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-20 19:01:18,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 37 transitions. [2022-03-20 19:01:18,496 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 37 transitions. Word has length 27 [2022-03-20 19:01:18,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 19:01:18,496 INFO L478 AbstractCegarLoop]: Abstraction has 34 states and 37 transitions. [2022-03-20 19:01:18,497 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.6666666666666667) internal successors, (20), 11 states have internal predecessors, (20), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 19:01:18,497 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 37 transitions. [2022-03-20 19:01:18,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-20 19:01:18,497 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 19:01:18,497 INFO L499 BasicCegarLoop]: trace histogram [8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 19:01:18,497 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-03-20 19:01:18,497 INFO L403 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 19:01:18,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 19:01:18,498 INFO L85 PathProgramCache]: Analyzing trace with hash -1427810270, now seen corresponding path program 8 times [2022-03-20 19:01:18,498 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 19:01:18,498 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1935977144] [2022-03-20 19:01:18,649 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 19:01:18,650 INFO L85 PathProgramCache]: Analyzing trace with hash 1698453496, now seen corresponding path program 1 times [2022-03-20 19:01:18,650 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:01:18,650 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [216754156] [2022-03-20 19:01:18,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:01:18,650 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:01:18,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:01:18,689 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 19:01:18,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:01:18,699 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 19:01:18,699 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 19:01:18,700 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [216754156] [2022-03-20 19:01:18,700 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [216754156] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:01:18,700 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:01:18,700 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 19:01:18,821 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 19:01:18,822 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1935977144] [2022-03-20 19:01:18,822 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1935977144] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:01:18,822 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:01:18,822 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-03-20 19:01:18,822 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [36009221] [2022-03-20 19:01:18,822 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 19:01:18,823 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-20 19:01:18,823 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 19:01:18,824 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-20 19:01:18,824 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2022-03-20 19:01:18,824 INFO L87 Difference]: Start difference. First operand 34 states and 37 transitions. Second operand has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 12 states have internal predecessors, (21), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 19:01:19,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 19:01:19,028 INFO L93 Difference]: Finished difference Result 67 states and 76 transitions. [2022-03-20 19:01:19,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-20 19:01:19,029 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 12 states have internal predecessors, (21), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 28 [2022-03-20 19:01:19,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 19:01:19,029 INFO L225 Difference]: With dead ends: 67 [2022-03-20 19:01:19,029 INFO L226 Difference]: Without dead ends: 40 [2022-03-20 19:01:19,030 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=90, Invalid=416, Unknown=0, NotChecked=0, Total=506 [2022-03-20 19:01:19,031 INFO L913 BasicCegarLoop]: 19 mSDtfsCounter, 20 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 233 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 263 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 233 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 19:01:19,031 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 56 Invalid, 263 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 233 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 19:01:19,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2022-03-20 19:01:19,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 35. [2022-03-20 19:01:19,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 26 states have (on average 1.1538461538461537) internal successors, (30), 27 states have internal predecessors, (30), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-20 19:01:19,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 38 transitions. [2022-03-20 19:01:19,046 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 38 transitions. Word has length 28 [2022-03-20 19:01:19,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 19:01:19,046 INFO L478 AbstractCegarLoop]: Abstraction has 35 states and 38 transitions. [2022-03-20 19:01:19,046 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 12 states have internal predecessors, (21), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 19:01:19,046 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 38 transitions. [2022-03-20 19:01:19,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-03-20 19:01:19,047 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 19:01:19,047 INFO L499 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 19:01:19,047 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-03-20 19:01:19,047 INFO L403 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 19:01:19,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 19:01:19,047 INFO L85 PathProgramCache]: Analyzing trace with hash -360162814, now seen corresponding path program 9 times [2022-03-20 19:01:19,047 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 19:01:19,048 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [72458758] [2022-03-20 19:01:19,181 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 19:01:19,182 INFO L85 PathProgramCache]: Analyzing trace with hash 1757558840, now seen corresponding path program 1 times [2022-03-20 19:01:19,182 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:01:19,182 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [315846935] [2022-03-20 19:01:19,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:01:19,183 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:01:19,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:01:19,215 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 19:01:19,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:01:19,220 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 19:01:19,220 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 19:01:19,220 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [315846935] [2022-03-20 19:01:19,221 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [315846935] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:01:19,221 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:01:19,221 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 19:01:19,331 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 19:01:19,331 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [72458758] [2022-03-20 19:01:19,331 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [72458758] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:01:19,331 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:01:19,331 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-03-20 19:01:19,331 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [882077946] [2022-03-20 19:01:19,331 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 19:01:19,332 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-20 19:01:19,333 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 19:01:19,333 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-20 19:01:19,333 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2022-03-20 19:01:19,333 INFO L87 Difference]: Start difference. First operand 35 states and 38 transitions. Second operand has 14 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 13 states have internal predecessors, (22), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 19:01:19,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 19:01:19,567 INFO L93 Difference]: Finished difference Result 69 states and 78 transitions. [2022-03-20 19:01:19,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-20 19:01:19,567 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 13 states have internal predecessors, (22), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 29 [2022-03-20 19:01:19,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 19:01:19,568 INFO L225 Difference]: With dead ends: 69 [2022-03-20 19:01:19,568 INFO L226 Difference]: Without dead ends: 41 [2022-03-20 19:01:19,569 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=99, Invalid=501, Unknown=0, NotChecked=0, Total=600 [2022-03-20 19:01:19,569 INFO L913 BasicCegarLoop]: 19 mSDtfsCounter, 20 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 299 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 71 SdHoareTripleChecker+Invalid, 331 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 299 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 19:01:19,570 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 71 Invalid, 331 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 299 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 19:01:19,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2022-03-20 19:01:19,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 36. [2022-03-20 19:01:19,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 27 states have (on average 1.1481481481481481) internal successors, (31), 28 states have internal predecessors, (31), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-20 19:01:19,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 39 transitions. [2022-03-20 19:01:19,578 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 39 transitions. Word has length 29 [2022-03-20 19:01:19,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 19:01:19,578 INFO L478 AbstractCegarLoop]: Abstraction has 36 states and 39 transitions. [2022-03-20 19:01:19,579 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 13 states have internal predecessors, (22), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 19:01:19,579 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 39 transitions. [2022-03-20 19:01:19,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-20 19:01:19,580 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 19:01:19,580 INFO L499 BasicCegarLoop]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 19:01:19,580 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-03-20 19:01:19,580 INFO L403 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 19:01:19,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 19:01:19,581 INFO L85 PathProgramCache]: Analyzing trace with hash -1622830046, now seen corresponding path program 10 times [2022-03-20 19:01:19,582 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 19:01:19,582 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1219618552] [2022-03-20 19:01:19,717 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 19:01:19,717 INFO L85 PathProgramCache]: Analyzing trace with hash 1816664184, now seen corresponding path program 1 times [2022-03-20 19:01:19,718 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:01:19,718 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1557808701] [2022-03-20 19:01:19,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:01:19,718 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:01:19,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:01:19,757 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 19:01:19,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:01:19,762 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 19:01:19,762 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 19:01:19,763 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1557808701] [2022-03-20 19:01:19,763 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1557808701] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:01:19,763 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:01:19,763 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 19:01:19,900 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 19:01:19,900 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1219618552] [2022-03-20 19:01:19,900 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1219618552] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:01:19,900 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:01:19,900 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-03-20 19:01:19,900 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [596694633] [2022-03-20 19:01:19,900 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 19:01:19,900 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-20 19:01:19,901 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 19:01:19,901 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-20 19:01:19,901 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2022-03-20 19:01:19,901 INFO L87 Difference]: Start difference. First operand 36 states and 39 transitions. Second operand has 15 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 14 states have internal predecessors, (23), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 19:01:20,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 19:01:20,218 INFO L93 Difference]: Finished difference Result 71 states and 80 transitions. [2022-03-20 19:01:20,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-20 19:01:20,218 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 14 states have internal predecessors, (23), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 30 [2022-03-20 19:01:20,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 19:01:20,219 INFO L225 Difference]: With dead ends: 71 [2022-03-20 19:01:20,219 INFO L226 Difference]: Without dead ends: 42 [2022-03-20 19:01:20,220 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=108, Invalid=594, Unknown=0, NotChecked=0, Total=702 [2022-03-20 19:01:20,220 INFO L913 BasicCegarLoop]: 19 mSDtfsCounter, 20 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 297 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 331 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 297 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 19:01:20,220 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 61 Invalid, 331 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 297 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-20 19:01:20,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2022-03-20 19:01:20,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 37. [2022-03-20 19:01:20,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 28 states have (on average 1.1428571428571428) internal successors, (32), 29 states have internal predecessors, (32), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-20 19:01:20,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 40 transitions. [2022-03-20 19:01:20,229 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 40 transitions. Word has length 30 [2022-03-20 19:01:20,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 19:01:20,229 INFO L478 AbstractCegarLoop]: Abstraction has 37 states and 40 transitions. [2022-03-20 19:01:20,229 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 14 states have internal predecessors, (23), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 19:01:20,229 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 40 transitions. [2022-03-20 19:01:20,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-03-20 19:01:20,230 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 19:01:20,230 INFO L499 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 19:01:20,230 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-03-20 19:01:20,230 INFO L403 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 19:01:20,230 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 19:01:20,230 INFO L85 PathProgramCache]: Analyzing trace with hash -2110808574, now seen corresponding path program 11 times [2022-03-20 19:01:20,231 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 19:01:20,231 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [833059124] [2022-03-20 19:01:20,386 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 19:01:20,387 INFO L85 PathProgramCache]: Analyzing trace with hash 1875769528, now seen corresponding path program 1 times [2022-03-20 19:01:20,387 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:01:20,387 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1754434197] [2022-03-20 19:01:20,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:01:20,388 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:01:20,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:01:20,436 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 19:01:20,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:01:20,441 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 19:01:20,441 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 19:01:20,441 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1754434197] [2022-03-20 19:01:20,443 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1754434197] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:01:20,443 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:01:20,443 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 19:01:20,609 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 19:01:20,609 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [833059124] [2022-03-20 19:01:20,609 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [833059124] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:01:20,609 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:01:20,609 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-03-20 19:01:20,609 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [958849755] [2022-03-20 19:01:20,610 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 19:01:20,610 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-20 19:01:20,610 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 19:01:20,610 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-20 19:01:20,610 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2022-03-20 19:01:20,610 INFO L87 Difference]: Start difference. First operand 37 states and 40 transitions. Second operand has 16 states, 16 states have (on average 1.5) internal successors, (24), 15 states have internal predecessors, (24), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 19:01:20,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 19:01:20,884 INFO L93 Difference]: Finished difference Result 73 states and 82 transitions. [2022-03-20 19:01:20,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-20 19:01:20,884 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5) internal successors, (24), 15 states have internal predecessors, (24), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 31 [2022-03-20 19:01:20,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 19:01:20,885 INFO L225 Difference]: With dead ends: 73 [2022-03-20 19:01:20,885 INFO L226 Difference]: Without dead ends: 43 [2022-03-20 19:01:20,885 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=117, Invalid=695, Unknown=0, NotChecked=0, Total=812 [2022-03-20 19:01:20,886 INFO L913 BasicCegarLoop]: 19 mSDtfsCounter, 20 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 226 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 263 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 226 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 19:01:20,886 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 26 Invalid, 263 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 226 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 19:01:20,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2022-03-20 19:01:20,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 38. [2022-03-20 19:01:20,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 29 states have (on average 1.1379310344827587) internal successors, (33), 30 states have internal predecessors, (33), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-20 19:01:20,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 41 transitions. [2022-03-20 19:01:20,897 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 41 transitions. Word has length 31 [2022-03-20 19:01:20,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 19:01:20,897 INFO L478 AbstractCegarLoop]: Abstraction has 38 states and 41 transitions. [2022-03-20 19:01:20,897 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.5) internal successors, (24), 15 states have internal predecessors, (24), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 19:01:20,897 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 41 transitions. [2022-03-20 19:01:20,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-03-20 19:01:20,899 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 19:01:20,899 INFO L499 BasicCegarLoop]: trace histogram [12, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 19:01:20,899 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-03-20 19:01:20,899 INFO L403 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 19:01:20,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 19:01:20,900 INFO L85 PathProgramCache]: Analyzing trace with hash -58273758, now seen corresponding path program 12 times [2022-03-20 19:01:20,900 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 19:01:20,900 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1397778027] [2022-03-20 19:01:21,058 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 19:01:21,058 INFO L85 PathProgramCache]: Analyzing trace with hash 1934874872, now seen corresponding path program 1 times [2022-03-20 19:01:21,058 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:01:21,058 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [496564743] [2022-03-20 19:01:21,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:01:21,059 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:01:21,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:01:21,111 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 19:01:21,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:01:21,114 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 19:01:21,115 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 19:01:21,115 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [496564743] [2022-03-20 19:01:21,115 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [496564743] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:01:21,115 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:01:21,115 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 19:01:21,304 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 19:01:21,304 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1397778027] [2022-03-20 19:01:21,304 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1397778027] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:01:21,304 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:01:21,304 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-03-20 19:01:21,305 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1788146238] [2022-03-20 19:01:21,305 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 19:01:21,305 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-20 19:01:21,305 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 19:01:21,305 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-20 19:01:21,305 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2022-03-20 19:01:21,306 INFO L87 Difference]: Start difference. First operand 38 states and 41 transitions. Second operand has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 19:01:21,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 19:01:21,603 INFO L93 Difference]: Finished difference Result 75 states and 84 transitions. [2022-03-20 19:01:21,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-20 19:01:21,604 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 32 [2022-03-20 19:01:21,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 19:01:21,604 INFO L225 Difference]: With dead ends: 75 [2022-03-20 19:01:21,604 INFO L226 Difference]: Without dead ends: 44 [2022-03-20 19:01:21,605 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=126, Invalid=804, Unknown=0, NotChecked=0, Total=930 [2022-03-20 19:01:21,605 INFO L913 BasicCegarLoop]: 19 mSDtfsCounter, 20 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 284 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 323 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 284 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 19:01:21,606 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 36 Invalid, 323 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 284 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 19:01:21,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2022-03-20 19:01:21,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 39. [2022-03-20 19:01:21,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 30 states have (on average 1.1333333333333333) internal successors, (34), 31 states have internal predecessors, (34), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-20 19:01:21,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 42 transitions. [2022-03-20 19:01:21,629 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 42 transitions. Word has length 32 [2022-03-20 19:01:21,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 19:01:21,630 INFO L478 AbstractCegarLoop]: Abstraction has 39 states and 42 transitions. [2022-03-20 19:01:21,630 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 19:01:21,630 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 42 transitions. [2022-03-20 19:01:21,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-20 19:01:21,631 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 19:01:21,631 INFO L499 BasicCegarLoop]: trace histogram [13, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 19:01:21,631 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-03-20 19:01:21,632 INFO L403 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 19:01:21,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 19:01:21,632 INFO L85 PathProgramCache]: Analyzing trace with hash -854203902, now seen corresponding path program 13 times [2022-03-20 19:01:21,632 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 19:01:21,632 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [531644587] [2022-03-20 19:01:21,781 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 19:01:21,782 INFO L85 PathProgramCache]: Analyzing trace with hash 1993980216, now seen corresponding path program 1 times [2022-03-20 19:01:21,782 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:01:21,782 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1593680587] [2022-03-20 19:01:21,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:01:21,782 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:01:21,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:01:21,820 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 19:01:21,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:01:21,823 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 19:01:21,823 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 19:01:21,823 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1593680587] [2022-03-20 19:01:21,823 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1593680587] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:01:21,823 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:01:21,823 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 19:01:22,035 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 19:01:22,035 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [531644587] [2022-03-20 19:01:22,035 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [531644587] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:01:22,035 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:01:22,035 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-03-20 19:01:22,035 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [573564062] [2022-03-20 19:01:22,036 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 19:01:22,036 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-20 19:01:22,036 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 19:01:22,036 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-20 19:01:22,036 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2022-03-20 19:01:22,037 INFO L87 Difference]: Start difference. First operand 39 states and 42 transitions. Second operand has 18 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 17 states have internal predecessors, (26), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 19:01:22,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 19:01:22,369 INFO L93 Difference]: Finished difference Result 77 states and 86 transitions. [2022-03-20 19:01:22,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-03-20 19:01:22,370 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 17 states have internal predecessors, (26), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 33 [2022-03-20 19:01:22,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 19:01:22,371 INFO L225 Difference]: With dead ends: 77 [2022-03-20 19:01:22,371 INFO L226 Difference]: Without dead ends: 45 [2022-03-20 19:01:22,372 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=135, Invalid=921, Unknown=0, NotChecked=0, Total=1056 [2022-03-20 19:01:22,372 INFO L913 BasicCegarLoop]: 19 mSDtfsCounter, 20 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 302 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 343 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 302 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 19:01:22,372 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 31 Invalid, 343 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 302 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 19:01:22,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2022-03-20 19:01:22,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 40. [2022-03-20 19:01:22,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 31 states have (on average 1.1290322580645162) internal successors, (35), 32 states have internal predecessors, (35), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-20 19:01:22,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 43 transitions. [2022-03-20 19:01:22,383 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 43 transitions. Word has length 33 [2022-03-20 19:01:22,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 19:01:22,383 INFO L478 AbstractCegarLoop]: Abstraction has 40 states and 43 transitions. [2022-03-20 19:01:22,383 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 17 states have internal predecessors, (26), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 19:01:22,383 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 43 transitions. [2022-03-20 19:01:22,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-03-20 19:01:22,383 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 19:01:22,384 INFO L499 BasicCegarLoop]: trace histogram [14, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 19:01:22,384 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-03-20 19:01:22,384 INFO L403 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 19:01:22,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 19:01:22,384 INFO L85 PathProgramCache]: Analyzing trace with hash 241765410, now seen corresponding path program 14 times [2022-03-20 19:01:22,384 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 19:01:22,384 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [174496310] [2022-03-20 19:01:22,535 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 19:01:22,536 INFO L85 PathProgramCache]: Analyzing trace with hash 2053085560, now seen corresponding path program 1 times [2022-03-20 19:01:22,536 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:01:22,536 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [796801570] [2022-03-20 19:01:22,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:01:22,536 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:01:22,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:01:22,575 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 19:01:22,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:01:22,579 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 19:01:22,579 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 19:01:22,579 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [796801570] [2022-03-20 19:01:22,581 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [796801570] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:01:22,581 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:01:22,581 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 19:01:22,784 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 19:01:22,785 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [174496310] [2022-03-20 19:01:22,785 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [174496310] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:01:22,785 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:01:22,785 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-03-20 19:01:22,785 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [36416228] [2022-03-20 19:01:22,785 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 19:01:22,785 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-20 19:01:22,785 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 19:01:22,786 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-20 19:01:22,786 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=292, Unknown=0, NotChecked=0, Total=342 [2022-03-20 19:01:22,786 INFO L87 Difference]: Start difference. First operand 40 states and 43 transitions. Second operand has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 states have internal predecessors, (27), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 19:01:23,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 19:01:23,161 INFO L93 Difference]: Finished difference Result 79 states and 88 transitions. [2022-03-20 19:01:23,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-03-20 19:01:23,163 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 states have internal predecessors, (27), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 34 [2022-03-20 19:01:23,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 19:01:23,163 INFO L225 Difference]: With dead ends: 79 [2022-03-20 19:01:23,164 INFO L226 Difference]: Without dead ends: 46 [2022-03-20 19:01:23,164 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=144, Invalid=1046, Unknown=0, NotChecked=0, Total=1190 [2022-03-20 19:01:23,165 INFO L913 BasicCegarLoop]: 19 mSDtfsCounter, 20 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 378 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 421 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 378 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 19:01:23,165 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 46 Invalid, 421 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 378 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-20 19:01:23,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2022-03-20 19:01:23,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 41. [2022-03-20 19:01:23,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 32 states have (on average 1.125) internal successors, (36), 33 states have internal predecessors, (36), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-20 19:01:23,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 44 transitions. [2022-03-20 19:01:23,176 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 44 transitions. Word has length 34 [2022-03-20 19:01:23,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 19:01:23,176 INFO L478 AbstractCegarLoop]: Abstraction has 41 states and 44 transitions. [2022-03-20 19:01:23,176 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 states have internal predecessors, (27), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 19:01:23,176 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 44 transitions. [2022-03-20 19:01:23,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-03-20 19:01:23,177 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 19:01:23,177 INFO L499 BasicCegarLoop]: trace histogram [15, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 19:01:23,177 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-03-20 19:01:23,177 INFO L403 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 19:01:23,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 19:01:23,177 INFO L85 PathProgramCache]: Analyzing trace with hash -142924286, now seen corresponding path program 15 times [2022-03-20 19:01:23,178 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 19:01:23,178 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [716294933] [2022-03-20 19:01:23,330 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 19:01:23,330 INFO L85 PathProgramCache]: Analyzing trace with hash 2112190904, now seen corresponding path program 1 times [2022-03-20 19:01:23,330 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:01:23,331 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [319922028] [2022-03-20 19:01:23,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:01:23,331 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:01:23,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:01:23,383 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 19:01:23,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:01:23,388 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 19:01:23,389 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 19:01:23,389 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [319922028] [2022-03-20 19:01:23,389 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [319922028] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:01:23,389 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:01:23,389 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 19:01:23,582 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 19:01:23,582 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [716294933] [2022-03-20 19:01:23,582 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [716294933] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:01:23,582 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:01:23,582 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-03-20 19:01:23,582 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1489337208] [2022-03-20 19:01:23,582 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 19:01:23,583 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-20 19:01:23,583 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 19:01:23,583 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-20 19:01:23,583 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=327, Unknown=0, NotChecked=0, Total=380 [2022-03-20 19:01:23,583 INFO L87 Difference]: Start difference. First operand 41 states and 44 transitions. Second operand has 20 states, 20 states have (on average 1.4) internal successors, (28), 19 states have internal predecessors, (28), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 19:01:24,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 19:01:24,048 INFO L93 Difference]: Finished difference Result 81 states and 90 transitions. [2022-03-20 19:01:24,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-03-20 19:01:24,048 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.4) internal successors, (28), 19 states have internal predecessors, (28), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 35 [2022-03-20 19:01:24,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 19:01:24,049 INFO L225 Difference]: With dead ends: 81 [2022-03-20 19:01:24,049 INFO L226 Difference]: Without dead ends: 47 [2022-03-20 19:01:24,049 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=153, Invalid=1179, Unknown=0, NotChecked=0, Total=1332 [2022-03-20 19:01:24,050 INFO L913 BasicCegarLoop]: 19 mSDtfsCounter, 20 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 555 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 96 SdHoareTripleChecker+Invalid, 599 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 555 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 19:01:24,050 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 96 Invalid, 599 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 555 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-20 19:01:24,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2022-03-20 19:01:24,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 42. [2022-03-20 19:01:24,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 33 states have (on average 1.121212121212121) internal successors, (37), 34 states have internal predecessors, (37), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-20 19:01:24,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 45 transitions. [2022-03-20 19:01:24,061 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 45 transitions. Word has length 35 [2022-03-20 19:01:24,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 19:01:24,061 INFO L478 AbstractCegarLoop]: Abstraction has 42 states and 45 transitions. [2022-03-20 19:01:24,061 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.4) internal successors, (28), 19 states have internal predecessors, (28), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 19:01:24,061 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 45 transitions. [2022-03-20 19:01:24,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-03-20 19:01:24,062 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 19:01:24,062 INFO L499 BasicCegarLoop]: trace histogram [16, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 19:01:24,062 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-03-20 19:01:24,062 INFO L403 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 19:01:24,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 19:01:24,062 INFO L85 PathProgramCache]: Analyzing trace with hash 816597026, now seen corresponding path program 16 times [2022-03-20 19:01:24,062 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 19:01:24,063 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1436242948] [2022-03-20 19:01:24,213 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 19:01:24,214 INFO L85 PathProgramCache]: Analyzing trace with hash -2123671048, now seen corresponding path program 1 times [2022-03-20 19:01:24,214 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:01:24,214 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1676067805] [2022-03-20 19:01:24,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:01:24,214 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:01:24,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:01:24,242 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 19:01:24,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:01:24,244 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 19:01:24,245 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 19:01:24,245 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1676067805] [2022-03-20 19:01:24,245 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1676067805] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:01:24,245 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:01:24,245 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 19:01:24,480 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 19:01:24,481 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1436242948] [2022-03-20 19:01:24,481 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1436242948] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:01:24,481 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:01:24,481 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2022-03-20 19:01:24,481 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1399431376] [2022-03-20 19:01:24,481 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 19:01:24,481 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-20 19:01:24,481 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 19:01:24,481 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-20 19:01:24,482 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=364, Unknown=0, NotChecked=0, Total=420 [2022-03-20 19:01:24,482 INFO L87 Difference]: Start difference. First operand 42 states and 45 transitions. Second operand has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 20 states have internal predecessors, (29), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 19:01:24,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 19:01:24,899 INFO L93 Difference]: Finished difference Result 83 states and 92 transitions. [2022-03-20 19:01:24,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-03-20 19:01:24,899 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 20 states have internal predecessors, (29), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 36 [2022-03-20 19:01:24,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 19:01:24,900 INFO L225 Difference]: With dead ends: 83 [2022-03-20 19:01:24,900 INFO L226 Difference]: Without dead ends: 48 [2022-03-20 19:01:24,900 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=162, Invalid=1320, Unknown=0, NotChecked=0, Total=1482 [2022-03-20 19:01:24,901 INFO L913 BasicCegarLoop]: 19 mSDtfsCounter, 20 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 593 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 96 SdHoareTripleChecker+Invalid, 639 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 593 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 19:01:24,901 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 96 Invalid, 639 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 593 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-20 19:01:24,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2022-03-20 19:01:24,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 43. [2022-03-20 19:01:24,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 34 states have (on average 1.1176470588235294) internal successors, (38), 35 states have internal predecessors, (38), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-20 19:01:24,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 46 transitions. [2022-03-20 19:01:24,914 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 46 transitions. Word has length 36 [2022-03-20 19:01:24,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 19:01:24,915 INFO L478 AbstractCegarLoop]: Abstraction has 43 states and 46 transitions. [2022-03-20 19:01:24,915 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 20 states have internal predecessors, (29), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 19:01:24,915 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 46 transitions. [2022-03-20 19:01:24,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-03-20 19:01:24,915 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 19:01:24,915 INFO L499 BasicCegarLoop]: trace histogram [17, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 19:01:24,915 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2022-03-20 19:01:24,915 INFO L403 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 19:01:24,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 19:01:24,916 INFO L85 PathProgramCache]: Analyzing trace with hash 496986626, now seen corresponding path program 17 times [2022-03-20 19:01:24,916 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 19:01:24,916 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2046480052] [2022-03-20 19:01:25,094 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 19:01:25,095 INFO L85 PathProgramCache]: Analyzing trace with hash -2064565704, now seen corresponding path program 1 times [2022-03-20 19:01:25,095 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:01:25,096 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1580476768] [2022-03-20 19:01:25,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:01:25,096 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:01:25,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:01:25,137 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 19:01:25,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:01:25,142 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 19:01:25,142 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 19:01:25,142 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1580476768] [2022-03-20 19:01:25,142 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1580476768] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:01:25,142 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:01:25,142 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 19:01:25,399 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 19:01:25,399 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2046480052] [2022-03-20 19:01:25,399 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2046480052] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:01:25,399 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:01:25,399 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2022-03-20 19:01:25,399 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [713106117] [2022-03-20 19:01:25,399 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 19:01:25,400 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-20 19:01:25,400 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 19:01:25,400 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-20 19:01:25,400 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=403, Unknown=0, NotChecked=0, Total=462 [2022-03-20 19:01:25,401 INFO L87 Difference]: Start difference. First operand 43 states and 46 transitions. Second operand has 22 states, 22 states have (on average 1.3636363636363635) internal successors, (30), 21 states have internal predecessors, (30), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 19:01:25,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 19:01:25,898 INFO L93 Difference]: Finished difference Result 85 states and 94 transitions. [2022-03-20 19:01:25,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-03-20 19:01:25,898 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.3636363636363635) internal successors, (30), 21 states have internal predecessors, (30), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 37 [2022-03-20 19:01:25,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 19:01:25,899 INFO L225 Difference]: With dead ends: 85 [2022-03-20 19:01:25,899 INFO L226 Difference]: Without dead ends: 49 [2022-03-20 19:01:25,900 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 171 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=171, Invalid=1469, Unknown=0, NotChecked=0, Total=1640 [2022-03-20 19:01:25,900 INFO L913 BasicCegarLoop]: 19 mSDtfsCounter, 20 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 577 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 76 SdHoareTripleChecker+Invalid, 625 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 577 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-20 19:01:25,900 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 76 Invalid, 625 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 577 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-20 19:01:25,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2022-03-20 19:01:25,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 44. [2022-03-20 19:01:25,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 35 states have (on average 1.1142857142857143) internal successors, (39), 36 states have internal predecessors, (39), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-20 19:01:25,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 47 transitions. [2022-03-20 19:01:25,913 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 47 transitions. Word has length 37 [2022-03-20 19:01:25,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 19:01:25,913 INFO L478 AbstractCegarLoop]: Abstraction has 44 states and 47 transitions. [2022-03-20 19:01:25,913 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.3636363636363635) internal successors, (30), 21 states have internal predecessors, (30), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 19:01:25,913 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 47 transitions. [2022-03-20 19:01:25,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-03-20 19:01:25,914 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 19:01:25,914 INFO L499 BasicCegarLoop]: trace histogram [18, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 19:01:25,914 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2022-03-20 19:01:25,914 INFO L403 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 19:01:25,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 19:01:25,914 INFO L85 PathProgramCache]: Analyzing trace with hash -821001182, now seen corresponding path program 18 times [2022-03-20 19:01:25,914 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 19:01:25,914 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1130256252] [2022-03-20 19:01:26,075 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 19:01:26,075 INFO L85 PathProgramCache]: Analyzing trace with hash -2005460360, now seen corresponding path program 1 times [2022-03-20 19:01:26,075 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:01:26,076 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1517613384] [2022-03-20 19:01:26,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:01:26,076 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:01:26,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:01:26,107 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 19:01:26,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:01:26,110 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 19:01:26,110 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 19:01:26,110 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1517613384] [2022-03-20 19:01:26,110 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1517613384] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:01:26,110 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:01:26,110 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 19:01:26,371 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 19:01:26,372 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1130256252] [2022-03-20 19:01:26,372 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1130256252] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:01:26,372 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:01:26,372 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2022-03-20 19:01:26,372 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [132755350] [2022-03-20 19:01:26,372 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 19:01:26,372 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-03-20 19:01:26,372 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 19:01:26,372 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-03-20 19:01:26,372 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=444, Unknown=0, NotChecked=0, Total=506 [2022-03-20 19:01:26,373 INFO L87 Difference]: Start difference. First operand 44 states and 47 transitions. Second operand has 23 states, 23 states have (on average 1.3478260869565217) internal successors, (31), 22 states have internal predecessors, (31), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 19:01:26,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 19:01:26,912 INFO L93 Difference]: Finished difference Result 87 states and 96 transitions. [2022-03-20 19:01:26,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-03-20 19:01:26,912 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.3478260869565217) internal successors, (31), 22 states have internal predecessors, (31), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 38 [2022-03-20 19:01:26,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 19:01:26,916 INFO L225 Difference]: With dead ends: 87 [2022-03-20 19:01:26,916 INFO L226 Difference]: Without dead ends: 50 [2022-03-20 19:01:26,917 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=180, Invalid=1626, Unknown=0, NotChecked=0, Total=1806 [2022-03-20 19:01:26,921 INFO L913 BasicCegarLoop]: 19 mSDtfsCounter, 20 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 703 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 106 SdHoareTripleChecker+Invalid, 753 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 703 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-20 19:01:26,921 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 106 Invalid, 753 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 703 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-20 19:01:26,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2022-03-20 19:01:26,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 45. [2022-03-20 19:01:26,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 36 states have (on average 1.1111111111111112) internal successors, (40), 37 states have internal predecessors, (40), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-20 19:01:26,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 48 transitions. [2022-03-20 19:01:26,931 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 48 transitions. Word has length 38 [2022-03-20 19:01:26,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 19:01:26,931 INFO L478 AbstractCegarLoop]: Abstraction has 45 states and 48 transitions. [2022-03-20 19:01:26,932 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.3478260869565217) internal successors, (31), 22 states have internal predecessors, (31), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 19:01:26,932 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 48 transitions. [2022-03-20 19:01:26,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-03-20 19:01:26,932 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 19:01:26,932 INFO L499 BasicCegarLoop]: trace histogram [19, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 19:01:26,932 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2022-03-20 19:01:26,932 INFO L403 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 19:01:26,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 19:01:26,933 INFO L85 PathProgramCache]: Analyzing trace with hash 1271049730, now seen corresponding path program 19 times [2022-03-20 19:01:26,933 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 19:01:26,933 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [156818780] [2022-03-20 19:01:27,077 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 19:01:27,077 INFO L85 PathProgramCache]: Analyzing trace with hash -1946355016, now seen corresponding path program 1 times [2022-03-20 19:01:27,078 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:01:27,078 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2126080134] [2022-03-20 19:01:27,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:01:27,078 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:01:27,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:01:27,115 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 19:01:27,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:01:27,118 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 19:01:27,118 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 19:01:27,118 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2126080134] [2022-03-20 19:01:27,119 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2126080134] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:01:27,119 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:01:27,119 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 19:01:27,398 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 19:01:27,399 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [156818780] [2022-03-20 19:01:27,399 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [156818780] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:01:27,399 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:01:27,399 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2022-03-20 19:01:27,399 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [849308160] [2022-03-20 19:01:27,399 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 19:01:27,399 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-20 19:01:27,399 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 19:01:27,399 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-20 19:01:27,400 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=487, Unknown=0, NotChecked=0, Total=552 [2022-03-20 19:01:27,400 INFO L87 Difference]: Start difference. First operand 45 states and 48 transitions. Second operand has 24 states, 24 states have (on average 1.3333333333333333) internal successors, (32), 23 states have internal predecessors, (32), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 19:01:28,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 19:01:28,000 INFO L93 Difference]: Finished difference Result 89 states and 98 transitions. [2022-03-20 19:01:28,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-03-20 19:01:28,001 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.3333333333333333) internal successors, (32), 23 states have internal predecessors, (32), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 39 [2022-03-20 19:01:28,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 19:01:28,001 INFO L225 Difference]: With dead ends: 89 [2022-03-20 19:01:28,001 INFO L226 Difference]: Without dead ends: 51 [2022-03-20 19:01:28,002 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 210 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=189, Invalid=1791, Unknown=0, NotChecked=0, Total=1980 [2022-03-20 19:01:28,002 INFO L913 BasicCegarLoop]: 19 mSDtfsCounter, 20 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 775 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 116 SdHoareTripleChecker+Invalid, 827 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 775 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-20 19:01:28,002 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 116 Invalid, 827 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 775 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-20 19:01:28,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2022-03-20 19:01:28,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 46. [2022-03-20 19:01:28,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 37 states have (on average 1.1081081081081081) internal successors, (41), 38 states have internal predecessors, (41), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-20 19:01:28,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 49 transitions. [2022-03-20 19:01:28,015 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 49 transitions. Word has length 39 [2022-03-20 19:01:28,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 19:01:28,015 INFO L478 AbstractCegarLoop]: Abstraction has 46 states and 49 transitions. [2022-03-20 19:01:28,015 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.3333333333333333) internal successors, (32), 23 states have internal predecessors, (32), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 19:01:28,015 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 49 transitions. [2022-03-20 19:01:28,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-03-20 19:01:28,015 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 19:01:28,015 INFO L499 BasicCegarLoop]: trace histogram [20, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 19:01:28,015 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2022-03-20 19:01:28,015 INFO L403 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 19:01:28,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 19:01:28,016 INFO L85 PathProgramCache]: Analyzing trace with hash 1700118562, now seen corresponding path program 20 times [2022-03-20 19:01:28,016 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 19:01:28,016 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1267571395] [2022-03-20 19:01:28,152 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 19:01:28,153 INFO L85 PathProgramCache]: Analyzing trace with hash -1887249672, now seen corresponding path program 1 times [2022-03-20 19:01:28,153 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:01:28,153 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [961677118] [2022-03-20 19:01:28,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:01:28,153 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:01:28,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:01:28,192 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 19:01:28,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:01:28,195 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 19:01:28,195 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 19:01:28,195 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [961677118] [2022-03-20 19:01:28,195 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [961677118] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:01:28,195 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:01:28,195 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 19:01:28,514 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 19:01:28,514 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1267571395] [2022-03-20 19:01:28,514 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1267571395] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:01:28,514 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:01:28,514 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2022-03-20 19:01:28,514 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [345658896] [2022-03-20 19:01:28,514 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 19:01:28,514 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-20 19:01:28,514 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 19:01:28,515 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-20 19:01:28,515 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=532, Unknown=0, NotChecked=0, Total=600 [2022-03-20 19:01:28,515 INFO L87 Difference]: Start difference. First operand 46 states and 49 transitions. Second operand has 25 states, 25 states have (on average 1.32) internal successors, (33), 24 states have internal predecessors, (33), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 19:01:29,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 19:01:29,055 INFO L93 Difference]: Finished difference Result 91 states and 100 transitions. [2022-03-20 19:01:29,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-03-20 19:01:29,056 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.32) internal successors, (33), 24 states have internal predecessors, (33), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 40 [2022-03-20 19:01:29,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 19:01:29,056 INFO L225 Difference]: With dead ends: 91 [2022-03-20 19:01:29,056 INFO L226 Difference]: Without dead ends: 52 [2022-03-20 19:01:29,057 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 231 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=198, Invalid=1964, Unknown=0, NotChecked=0, Total=2162 [2022-03-20 19:01:29,057 INFO L913 BasicCegarLoop]: 19 mSDtfsCounter, 20 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 680 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 735 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 680 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-20 19:01:29,058 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 66 Invalid, 735 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 680 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-20 19:01:29,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2022-03-20 19:01:29,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 47. [2022-03-20 19:01:29,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 38 states have (on average 1.105263157894737) internal successors, (42), 39 states have internal predecessors, (42), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-20 19:01:29,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 50 transitions. [2022-03-20 19:01:29,072 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 50 transitions. Word has length 40 [2022-03-20 19:01:29,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 19:01:29,072 INFO L478 AbstractCegarLoop]: Abstraction has 47 states and 50 transitions. [2022-03-20 19:01:29,072 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.32) internal successors, (33), 24 states have internal predecessors, (33), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 19:01:29,072 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 50 transitions. [2022-03-20 19:01:29,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-03-20 19:01:29,073 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 19:01:29,073 INFO L499 BasicCegarLoop]: trace histogram [21, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 19:01:29,073 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2022-03-20 19:01:29,073 INFO L403 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 19:01:29,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 19:01:29,073 INFO L85 PathProgramCache]: Analyzing trace with hash 2116350466, now seen corresponding path program 21 times [2022-03-20 19:01:29,073 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 19:01:29,073 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1187662030] [2022-03-20 19:01:29,237 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 19:01:29,237 INFO L85 PathProgramCache]: Analyzing trace with hash -1828144328, now seen corresponding path program 1 times [2022-03-20 19:01:29,238 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:01:29,238 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1459365480] [2022-03-20 19:01:29,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:01:29,238 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:01:29,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:01:29,266 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 19:01:29,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:01:29,277 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 19:01:29,278 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 19:01:29,278 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1459365480] [2022-03-20 19:01:29,278 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1459365480] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:01:29,278 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:01:29,278 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 19:01:29,647 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 19:01:29,647 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1187662030] [2022-03-20 19:01:29,647 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1187662030] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:01:29,647 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:01:29,647 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [26] imperfect sequences [] total 26 [2022-03-20 19:01:29,647 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [635265579] [2022-03-20 19:01:29,647 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 19:01:29,647 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-20 19:01:29,647 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 19:01:29,648 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-20 19:01:29,648 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=579, Unknown=0, NotChecked=0, Total=650 [2022-03-20 19:01:29,648 INFO L87 Difference]: Start difference. First operand 47 states and 50 transitions. Second operand has 26 states, 26 states have (on average 1.3076923076923077) internal successors, (34), 25 states have internal predecessors, (34), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 19:01:30,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 19:01:30,244 INFO L93 Difference]: Finished difference Result 93 states and 102 transitions. [2022-03-20 19:01:30,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-03-20 19:01:30,244 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.3076923076923077) internal successors, (34), 25 states have internal predecessors, (34), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 41 [2022-03-20 19:01:30,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 19:01:30,245 INFO L225 Difference]: With dead ends: 93 [2022-03-20 19:01:30,245 INFO L226 Difference]: Without dead ends: 53 [2022-03-20 19:01:30,245 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 253 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=207, Invalid=2145, Unknown=0, NotChecked=0, Total=2352 [2022-03-20 19:01:30,246 INFO L913 BasicCegarLoop]: 19 mSDtfsCounter, 20 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 911 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 131 SdHoareTripleChecker+Invalid, 967 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 911 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-20 19:01:30,246 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 131 Invalid, 967 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 911 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-20 19:01:30,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2022-03-20 19:01:30,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 48. [2022-03-20 19:01:30,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 39 states have (on average 1.1025641025641026) internal successors, (43), 40 states have internal predecessors, (43), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-20 19:01:30,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 51 transitions. [2022-03-20 19:01:30,259 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 51 transitions. Word has length 41 [2022-03-20 19:01:30,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 19:01:30,259 INFO L478 AbstractCegarLoop]: Abstraction has 48 states and 51 transitions. [2022-03-20 19:01:30,259 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.3076923076923077) internal successors, (34), 25 states have internal predecessors, (34), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 19:01:30,260 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 51 transitions. [2022-03-20 19:01:30,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-03-20 19:01:30,260 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 19:01:30,260 INFO L499 BasicCegarLoop]: trace histogram [22, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 19:01:30,260 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2022-03-20 19:01:30,260 INFO L403 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 19:01:30,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 19:01:30,261 INFO L85 PathProgramCache]: Analyzing trace with hash 2134637602, now seen corresponding path program 22 times [2022-03-20 19:01:30,261 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 19:01:30,261 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [275730936] [2022-03-20 19:01:30,396 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 19:01:30,397 INFO L85 PathProgramCache]: Analyzing trace with hash -1769038984, now seen corresponding path program 1 times [2022-03-20 19:01:30,397 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:01:30,397 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1709021763] [2022-03-20 19:01:30,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:01:30,397 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:01:30,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:01:30,433 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 19:01:30,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:01:30,436 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 19:01:30,436 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 19:01:30,436 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1709021763] [2022-03-20 19:01:30,436 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1709021763] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:01:30,436 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:01:30,436 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 19:01:30,792 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 19:01:30,792 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [275730936] [2022-03-20 19:01:30,792 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [275730936] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:01:30,792 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:01:30,792 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [27] imperfect sequences [] total 27 [2022-03-20 19:01:30,792 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1043036720] [2022-03-20 19:01:30,793 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 19:01:30,793 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-03-20 19:01:30,793 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 19:01:30,793 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-03-20 19:01:30,793 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=628, Unknown=0, NotChecked=0, Total=702 [2022-03-20 19:01:30,794 INFO L87 Difference]: Start difference. First operand 48 states and 51 transitions. Second operand has 27 states, 27 states have (on average 1.2962962962962963) internal successors, (35), 26 states have internal predecessors, (35), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 19:01:31,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 19:01:31,399 INFO L93 Difference]: Finished difference Result 95 states and 104 transitions. [2022-03-20 19:01:31,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-03-20 19:01:31,400 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.2962962962962963) internal successors, (35), 26 states have internal predecessors, (35), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 42 [2022-03-20 19:01:31,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 19:01:31,400 INFO L225 Difference]: With dead ends: 95 [2022-03-20 19:01:31,400 INFO L226 Difference]: Without dead ends: 54 [2022-03-20 19:01:31,401 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 276 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=216, Invalid=2334, Unknown=0, NotChecked=0, Total=2550 [2022-03-20 19:01:31,401 INFO L913 BasicCegarLoop]: 19 mSDtfsCounter, 20 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 876 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 101 SdHoareTripleChecker+Invalid, 935 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 876 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-20 19:01:31,402 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 101 Invalid, 935 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 876 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-20 19:01:31,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2022-03-20 19:01:31,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 49. [2022-03-20 19:01:31,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 40 states have (on average 1.1) internal successors, (44), 41 states have internal predecessors, (44), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-20 19:01:31,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 52 transitions. [2022-03-20 19:01:31,432 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 52 transitions. Word has length 42 [2022-03-20 19:01:31,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 19:01:31,432 INFO L478 AbstractCegarLoop]: Abstraction has 49 states and 52 transitions. [2022-03-20 19:01:31,432 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.2962962962962963) internal successors, (35), 26 states have internal predecessors, (35), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 19:01:31,432 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 52 transitions. [2022-03-20 19:01:31,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-03-20 19:01:31,432 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 19:01:31,432 INFO L499 BasicCegarLoop]: trace histogram [23, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 19:01:31,432 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2022-03-20 19:01:31,433 INFO L403 AbstractCegarLoop]: === Iteration 28 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 19:01:31,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 19:01:31,433 INFO L85 PathProgramCache]: Analyzing trace with hash -1593428478, now seen corresponding path program 23 times [2022-03-20 19:01:31,434 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 19:01:31,434 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1205257609] [2022-03-20 19:01:31,586 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 19:01:31,586 INFO L85 PathProgramCache]: Analyzing trace with hash -1709933640, now seen corresponding path program 1 times [2022-03-20 19:01:31,586 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:01:31,587 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [721951557] [2022-03-20 19:01:31,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:01:31,587 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:01:31,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:01:31,618 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 19:01:31,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:01:31,621 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 19:01:31,621 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 19:01:31,621 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [721951557] [2022-03-20 19:01:31,622 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [721951557] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:01:31,622 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:01:31,622 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 19:01:31,995 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 19:01:31,995 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1205257609] [2022-03-20 19:01:31,995 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1205257609] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:01:31,995 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:01:31,996 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [28] imperfect sequences [] total 28 [2022-03-20 19:01:31,996 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [523393100] [2022-03-20 19:01:31,996 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 19:01:31,996 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-03-20 19:01:31,996 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 19:01:31,996 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-03-20 19:01:31,996 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=679, Unknown=0, NotChecked=0, Total=756 [2022-03-20 19:01:31,997 INFO L87 Difference]: Start difference. First operand 49 states and 52 transitions. Second operand has 28 states, 28 states have (on average 1.2857142857142858) internal successors, (36), 27 states have internal predecessors, (36), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 19:01:32,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 19:01:32,575 INFO L93 Difference]: Finished difference Result 97 states and 106 transitions. [2022-03-20 19:01:32,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-03-20 19:01:32,575 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.2857142857142858) internal successors, (36), 27 states have internal predecessors, (36), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 43 [2022-03-20 19:01:32,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 19:01:32,576 INFO L225 Difference]: With dead ends: 97 [2022-03-20 19:01:32,576 INFO L226 Difference]: Without dead ends: 55 [2022-03-20 19:01:32,577 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 300 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=225, Invalid=2531, Unknown=0, NotChecked=0, Total=2756 [2022-03-20 19:01:32,577 INFO L913 BasicCegarLoop]: 19 mSDtfsCounter, 20 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 746 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 807 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 746 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 19:01:32,577 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 36 Invalid, 807 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 746 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-20 19:01:32,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2022-03-20 19:01:32,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 50. [2022-03-20 19:01:32,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 41 states have (on average 1.0975609756097562) internal successors, (45), 42 states have internal predecessors, (45), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-20 19:01:32,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 53 transitions. [2022-03-20 19:01:32,590 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 53 transitions. Word has length 43 [2022-03-20 19:01:32,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 19:01:32,590 INFO L478 AbstractCegarLoop]: Abstraction has 50 states and 53 transitions. [2022-03-20 19:01:32,590 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.2857142857142858) internal successors, (36), 27 states have internal predecessors, (36), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 19:01:32,590 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 53 transitions. [2022-03-20 19:01:32,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-03-20 19:01:32,591 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 19:01:32,591 INFO L499 BasicCegarLoop]: trace histogram [24, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 19:01:32,591 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2022-03-20 19:01:32,591 INFO L403 AbstractCegarLoop]: === Iteration 29 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 19:01:32,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 19:01:32,591 INFO L85 PathProgramCache]: Analyzing trace with hash -1199359966, now seen corresponding path program 24 times [2022-03-20 19:01:32,591 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 19:01:32,591 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1900239350] [2022-03-20 19:01:32,715 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 19:01:32,715 INFO L85 PathProgramCache]: Analyzing trace with hash -1650828296, now seen corresponding path program 1 times [2022-03-20 19:01:32,715 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:01:32,715 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1804158037] [2022-03-20 19:01:32,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:01:32,716 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:01:32,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:01:32,751 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 19:01:32,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:01:32,754 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 19:01:32,754 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 19:01:32,754 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1804158037] [2022-03-20 19:01:32,754 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1804158037] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:01:32,754 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:01:32,754 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 19:01:33,146 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 19:01:33,147 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1900239350] [2022-03-20 19:01:33,147 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1900239350] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:01:33,147 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:01:33,147 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [29] imperfect sequences [] total 29 [2022-03-20 19:01:33,147 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1917809545] [2022-03-20 19:01:33,147 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 19:01:33,147 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-03-20 19:01:33,147 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 19:01:33,148 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-03-20 19:01:33,148 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=732, Unknown=0, NotChecked=0, Total=812 [2022-03-20 19:01:33,148 INFO L87 Difference]: Start difference. First operand 50 states and 53 transitions. Second operand has 29 states, 29 states have (on average 1.2758620689655173) internal successors, (37), 28 states have internal predecessors, (37), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 19:01:33,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 19:01:33,850 INFO L93 Difference]: Finished difference Result 99 states and 108 transitions. [2022-03-20 19:01:33,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-03-20 19:01:33,850 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.2758620689655173) internal successors, (37), 28 states have internal predecessors, (37), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 44 [2022-03-20 19:01:33,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 19:01:33,850 INFO L225 Difference]: With dead ends: 99 [2022-03-20 19:01:33,850 INFO L226 Difference]: Without dead ends: 56 [2022-03-20 19:01:33,852 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 325 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=234, Invalid=2736, Unknown=0, NotChecked=0, Total=2970 [2022-03-20 19:01:33,852 INFO L913 BasicCegarLoop]: 19 mSDtfsCounter, 20 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 1011 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 111 SdHoareTripleChecker+Invalid, 1073 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 1011 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-20 19:01:33,852 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 111 Invalid, 1073 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 1011 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-20 19:01:33,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2022-03-20 19:01:33,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 51. [2022-03-20 19:01:33,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 42 states have (on average 1.0952380952380953) internal successors, (46), 43 states have internal predecessors, (46), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-20 19:01:33,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 54 transitions. [2022-03-20 19:01:33,866 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 54 transitions. Word has length 44 [2022-03-20 19:01:33,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 19:01:33,866 INFO L478 AbstractCegarLoop]: Abstraction has 51 states and 54 transitions. [2022-03-20 19:01:33,866 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.2758620689655173) internal successors, (37), 28 states have internal predecessors, (37), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 19:01:33,866 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 54 transitions. [2022-03-20 19:01:33,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-03-20 19:01:33,866 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 19:01:33,867 INFO L499 BasicCegarLoop]: trace histogram [25, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 19:01:33,867 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2022-03-20 19:01:33,867 INFO L403 AbstractCegarLoop]: === Iteration 30 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 19:01:33,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 19:01:33,867 INFO L85 PathProgramCache]: Analyzing trace with hash -1868137982, now seen corresponding path program 25 times [2022-03-20 19:01:33,867 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 19:01:33,867 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [906201187] [2022-03-20 19:01:34,001 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 19:01:34,001 INFO L85 PathProgramCache]: Analyzing trace with hash -1591722952, now seen corresponding path program 1 times [2022-03-20 19:01:34,001 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:01:34,001 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1258465038] [2022-03-20 19:01:34,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:01:34,001 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:01:34,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:01:34,037 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 19:01:34,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:01:34,040 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 19:01:34,040 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 19:01:34,041 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1258465038] [2022-03-20 19:01:34,041 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1258465038] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:01:34,041 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:01:34,041 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 19:01:34,441 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 19:01:34,441 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [906201187] [2022-03-20 19:01:34,442 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [906201187] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:01:34,442 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:01:34,442 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [30] imperfect sequences [] total 30 [2022-03-20 19:01:34,442 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2126089404] [2022-03-20 19:01:34,442 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 19:01:34,442 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-03-20 19:01:34,442 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 19:01:34,442 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-03-20 19:01:34,442 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=787, Unknown=0, NotChecked=0, Total=870 [2022-03-20 19:01:34,443 INFO L87 Difference]: Start difference. First operand 51 states and 54 transitions. Second operand has 30 states, 30 states have (on average 1.2666666666666666) internal successors, (38), 29 states have internal predecessors, (38), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 19:01:35,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 19:01:35,100 INFO L93 Difference]: Finished difference Result 101 states and 110 transitions. [2022-03-20 19:01:35,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-03-20 19:01:35,101 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.2666666666666666) internal successors, (38), 29 states have internal predecessors, (38), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 45 [2022-03-20 19:01:35,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 19:01:35,101 INFO L225 Difference]: With dead ends: 101 [2022-03-20 19:01:35,101 INFO L226 Difference]: Without dead ends: 57 [2022-03-20 19:01:35,102 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 351 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=243, Invalid=2949, Unknown=0, NotChecked=0, Total=3192 [2022-03-20 19:01:35,103 INFO L913 BasicCegarLoop]: 19 mSDtfsCounter, 20 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 842 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 907 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 842 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-20 19:01:35,103 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 31 Invalid, 907 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 842 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-20 19:01:35,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2022-03-20 19:01:35,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 52. [2022-03-20 19:01:35,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 43 states have (on average 1.0930232558139534) internal successors, (47), 44 states have internal predecessors, (47), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-20 19:01:35,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 55 transitions. [2022-03-20 19:01:35,117 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 55 transitions. Word has length 45 [2022-03-20 19:01:35,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 19:01:35,117 INFO L478 AbstractCegarLoop]: Abstraction has 52 states and 55 transitions. [2022-03-20 19:01:35,117 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.2666666666666666) internal successors, (38), 29 states have internal predecessors, (38), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 19:01:35,117 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 55 transitions. [2022-03-20 19:01:35,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-03-20 19:01:35,117 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 19:01:35,117 INFO L499 BasicCegarLoop]: trace histogram [26, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 19:01:35,117 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2022-03-20 19:01:35,117 INFO L403 AbstractCegarLoop]: === Iteration 31 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 19:01:35,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 19:01:35,118 INFO L85 PathProgramCache]: Analyzing trace with hash -1125419998, now seen corresponding path program 26 times [2022-03-20 19:01:35,118 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 19:01:35,118 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1643946358] [2022-03-20 19:01:35,252 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 19:01:35,253 INFO L85 PathProgramCache]: Analyzing trace with hash -1532617608, now seen corresponding path program 1 times [2022-03-20 19:01:35,253 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:01:35,253 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [223070577] [2022-03-20 19:01:35,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:01:35,253 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:01:35,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:01:35,278 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 19:01:35,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:01:35,280 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 19:01:35,280 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 19:01:35,280 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [223070577] [2022-03-20 19:01:35,281 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [223070577] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:01:35,281 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:01:35,281 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 19:01:35,682 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 19:01:35,682 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1643946358] [2022-03-20 19:01:35,682 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1643946358] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:01:35,683 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:01:35,683 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [31] imperfect sequences [] total 31 [2022-03-20 19:01:35,683 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1094506352] [2022-03-20 19:01:35,683 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 19:01:35,683 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-03-20 19:01:35,683 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 19:01:35,683 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-03-20 19:01:35,684 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=844, Unknown=0, NotChecked=0, Total=930 [2022-03-20 19:01:35,684 INFO L87 Difference]: Start difference. First operand 52 states and 55 transitions. Second operand has 31 states, 31 states have (on average 1.2580645161290323) internal successors, (39), 30 states have internal predecessors, (39), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 19:01:36,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 19:01:36,511 INFO L93 Difference]: Finished difference Result 103 states and 112 transitions. [2022-03-20 19:01:36,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-03-20 19:01:36,512 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.2580645161290323) internal successors, (39), 30 states have internal predecessors, (39), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 46 [2022-03-20 19:01:36,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 19:01:36,514 INFO L225 Difference]: With dead ends: 103 [2022-03-20 19:01:36,514 INFO L226 Difference]: Without dead ends: 58 [2022-03-20 19:01:36,515 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 378 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=252, Invalid=3170, Unknown=0, NotChecked=0, Total=3422 [2022-03-20 19:01:36,516 INFO L913 BasicCegarLoop]: 19 mSDtfsCounter, 20 mSDsluCounter, 117 mSDsCounter, 0 mSdLazyCounter, 1195 mSolverCounterSat, 66 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 136 SdHoareTripleChecker+Invalid, 1261 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 1195 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-20 19:01:36,516 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 136 Invalid, 1261 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [66 Valid, 1195 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-20 19:01:36,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2022-03-20 19:01:36,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 53. [2022-03-20 19:01:36,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 44 states have (on average 1.0909090909090908) internal successors, (48), 45 states have internal predecessors, (48), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-20 19:01:36,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 56 transitions. [2022-03-20 19:01:36,529 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 56 transitions. Word has length 46 [2022-03-20 19:01:36,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 19:01:36,529 INFO L478 AbstractCegarLoop]: Abstraction has 53 states and 56 transitions. [2022-03-20 19:01:36,529 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.2580645161290323) internal successors, (39), 30 states have internal predecessors, (39), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 19:01:36,529 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 56 transitions. [2022-03-20 19:01:36,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-03-20 19:01:36,530 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 19:01:36,530 INFO L499 BasicCegarLoop]: trace histogram [27, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 19:01:36,530 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2022-03-20 19:01:36,530 INFO L403 AbstractCegarLoop]: === Iteration 32 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 19:01:36,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 19:01:36,530 INFO L85 PathProgramCache]: Analyzing trace with hash 424001026, now seen corresponding path program 27 times [2022-03-20 19:01:36,530 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 19:01:36,530 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1360169117] [2022-03-20 19:01:36,675 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 19:01:36,675 INFO L85 PathProgramCache]: Analyzing trace with hash -1473512264, now seen corresponding path program 1 times [2022-03-20 19:01:36,676 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:01:36,676 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [284827723] [2022-03-20 19:01:36,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:01:36,676 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:01:36,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:01:36,703 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 19:01:36,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:01:36,706 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 19:01:36,706 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 19:01:36,706 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [284827723] [2022-03-20 19:01:36,706 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [284827723] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:01:36,706 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:01:36,706 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 19:01:37,166 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 19:01:37,167 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1360169117] [2022-03-20 19:01:37,167 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1360169117] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:01:37,167 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:01:37,167 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [32] imperfect sequences [] total 32 [2022-03-20 19:01:37,167 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1202197658] [2022-03-20 19:01:37,167 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 19:01:37,167 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-03-20 19:01:37,167 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 19:01:37,168 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-03-20 19:01:37,168 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=903, Unknown=0, NotChecked=0, Total=992 [2022-03-20 19:01:37,168 INFO L87 Difference]: Start difference. First operand 53 states and 56 transitions. Second operand has 32 states, 32 states have (on average 1.25) internal successors, (40), 31 states have internal predecessors, (40), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 19:01:38,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 19:01:38,117 INFO L93 Difference]: Finished difference Result 105 states and 114 transitions. [2022-03-20 19:01:38,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-03-20 19:01:38,118 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.25) internal successors, (40), 31 states have internal predecessors, (40), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 47 [2022-03-20 19:01:38,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 19:01:38,118 INFO L225 Difference]: With dead ends: 105 [2022-03-20 19:01:38,119 INFO L226 Difference]: Without dead ends: 59 [2022-03-20 19:01:38,120 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 406 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=261, Invalid=3399, Unknown=0, NotChecked=0, Total=3660 [2022-03-20 19:01:38,120 INFO L913 BasicCegarLoop]: 19 mSDtfsCounter, 20 mSDsluCounter, 142 mSDsCounter, 0 mSdLazyCounter, 1325 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 161 SdHoareTripleChecker+Invalid, 1393 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 1325 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-20 19:01:38,120 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 161 Invalid, 1393 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 1325 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-20 19:01:38,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2022-03-20 19:01:38,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 54. [2022-03-20 19:01:38,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 45 states have (on average 1.0888888888888888) internal successors, (49), 46 states have internal predecessors, (49), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-20 19:01:38,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 57 transitions. [2022-03-20 19:01:38,136 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 57 transitions. Word has length 47 [2022-03-20 19:01:38,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 19:01:38,136 INFO L478 AbstractCegarLoop]: Abstraction has 54 states and 57 transitions. [2022-03-20 19:01:38,136 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 1.25) internal successors, (40), 31 states have internal predecessors, (40), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 19:01:38,136 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 57 transitions. [2022-03-20 19:01:38,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-03-20 19:01:38,136 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 19:01:38,137 INFO L499 BasicCegarLoop]: trace histogram [28, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 19:01:38,137 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2022-03-20 19:01:38,137 INFO L403 AbstractCegarLoop]: === Iteration 33 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 19:01:38,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 19:01:38,137 INFO L85 PathProgramCache]: Analyzing trace with hash 1211412514, now seen corresponding path program 28 times [2022-03-20 19:01:38,137 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 19:01:38,137 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1945207156] [2022-03-20 19:01:38,293 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 19:01:38,294 INFO L85 PathProgramCache]: Analyzing trace with hash -1414406920, now seen corresponding path program 1 times [2022-03-20 19:01:38,294 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:01:38,294 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [863995838] [2022-03-20 19:01:38,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:01:38,294 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:01:38,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:01:38,327 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 19:01:38,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:01:38,329 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 19:01:38,330 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 19:01:38,330 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [863995838] [2022-03-20 19:01:38,330 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [863995838] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:01:38,330 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:01:38,330 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 19:01:38,830 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 19:01:38,831 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1945207156] [2022-03-20 19:01:38,831 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1945207156] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:01:38,831 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:01:38,831 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [33] imperfect sequences [] total 33 [2022-03-20 19:01:38,831 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [663412618] [2022-03-20 19:01:38,831 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 19:01:38,831 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-03-20 19:01:38,831 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 19:01:38,831 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-03-20 19:01:38,832 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=964, Unknown=0, NotChecked=0, Total=1056 [2022-03-20 19:01:38,832 INFO L87 Difference]: Start difference. First operand 54 states and 57 transitions. Second operand has 33 states, 33 states have (on average 1.2424242424242424) internal successors, (41), 32 states have internal predecessors, (41), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 19:01:39,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 19:01:39,749 INFO L93 Difference]: Finished difference Result 107 states and 116 transitions. [2022-03-20 19:01:39,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-03-20 19:01:39,749 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.2424242424242424) internal successors, (41), 32 states have internal predecessors, (41), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 48 [2022-03-20 19:01:39,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 19:01:39,750 INFO L225 Difference]: With dead ends: 107 [2022-03-20 19:01:39,750 INFO L226 Difference]: Without dead ends: 60 [2022-03-20 19:01:39,751 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 435 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=270, Invalid=3636, Unknown=0, NotChecked=0, Total=3906 [2022-03-20 19:01:39,751 INFO L913 BasicCegarLoop]: 19 mSDtfsCounter, 20 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 1303 mSolverCounterSat, 70 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 131 SdHoareTripleChecker+Invalid, 1373 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 70 IncrementalHoareTripleChecker+Valid, 1303 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-20 19:01:39,751 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 131 Invalid, 1373 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [70 Valid, 1303 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-20 19:01:39,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2022-03-20 19:01:39,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 55. [2022-03-20 19:01:39,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 46 states have (on average 1.0869565217391304) internal successors, (50), 47 states have internal predecessors, (50), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-20 19:01:39,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 58 transitions. [2022-03-20 19:01:39,766 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 58 transitions. Word has length 48 [2022-03-20 19:01:39,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 19:01:39,766 INFO L478 AbstractCegarLoop]: Abstraction has 55 states and 58 transitions. [2022-03-20 19:01:39,766 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 1.2424242424242424) internal successors, (41), 32 states have internal predecessors, (41), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 19:01:39,766 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 58 transitions. [2022-03-20 19:01:39,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-03-20 19:01:39,767 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 19:01:39,767 INFO L499 BasicCegarLoop]: trace histogram [29, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 19:01:39,767 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2022-03-20 19:01:39,767 INFO L403 AbstractCegarLoop]: === Iteration 34 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 19:01:39,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 19:01:39,767 INFO L85 PathProgramCache]: Analyzing trace with hash -148635134, now seen corresponding path program 29 times [2022-03-20 19:01:39,768 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 19:01:39,768 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [107831198] [2022-03-20 19:01:39,922 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 19:01:39,923 INFO L85 PathProgramCache]: Analyzing trace with hash -1355301576, now seen corresponding path program 1 times [2022-03-20 19:01:39,923 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:01:39,923 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [196098096] [2022-03-20 19:01:39,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:01:39,923 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:01:39,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:01:39,950 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 19:01:39,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:01:39,958 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 19:01:39,958 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 19:01:39,958 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [196098096] [2022-03-20 19:01:39,958 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [196098096] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:01:39,958 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:01:39,959 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 19:01:40,476 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 19:01:40,477 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [107831198] [2022-03-20 19:01:40,477 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [107831198] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:01:40,477 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:01:40,477 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [34] imperfect sequences [] total 34 [2022-03-20 19:01:40,477 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [213835617] [2022-03-20 19:01:40,477 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 19:01:40,477 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-03-20 19:01:40,477 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 19:01:40,477 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-03-20 19:01:40,478 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=1027, Unknown=0, NotChecked=0, Total=1122 [2022-03-20 19:01:40,478 INFO L87 Difference]: Start difference. First operand 55 states and 58 transitions. Second operand has 34 states, 34 states have (on average 1.2352941176470589) internal successors, (42), 33 states have internal predecessors, (42), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 19:01:41,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 19:01:41,488 INFO L93 Difference]: Finished difference Result 109 states and 118 transitions. [2022-03-20 19:01:41,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-03-20 19:01:41,488 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 1.2352941176470589) internal successors, (42), 33 states have internal predecessors, (42), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 49 [2022-03-20 19:01:41,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 19:01:41,489 INFO L225 Difference]: With dead ends: 109 [2022-03-20 19:01:41,489 INFO L226 Difference]: Without dead ends: 61 [2022-03-20 19:01:41,490 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 465 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=279, Invalid=3881, Unknown=0, NotChecked=0, Total=4160 [2022-03-20 19:01:41,490 INFO L913 BasicCegarLoop]: 19 mSDtfsCounter, 20 mSDsluCounter, 137 mSDsCounter, 0 mSdLazyCounter, 1437 mSolverCounterSat, 72 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 156 SdHoareTripleChecker+Invalid, 1509 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 1437 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-20 19:01:41,490 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 156 Invalid, 1509 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [72 Valid, 1437 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-20 19:01:41,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2022-03-20 19:01:41,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 56. [2022-03-20 19:01:41,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 47 states have (on average 1.0851063829787233) internal successors, (51), 48 states have internal predecessors, (51), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-20 19:01:41,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 59 transitions. [2022-03-20 19:01:41,511 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 59 transitions. Word has length 49 [2022-03-20 19:01:41,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 19:01:41,511 INFO L478 AbstractCegarLoop]: Abstraction has 56 states and 59 transitions. [2022-03-20 19:01:41,511 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 1.2352941176470589) internal successors, (42), 33 states have internal predecessors, (42), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 19:01:41,511 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 59 transitions. [2022-03-20 19:01:41,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-03-20 19:01:41,511 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 19:01:41,511 INFO L499 BasicCegarLoop]: trace histogram [30, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 19:01:41,512 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2022-03-20 19:01:41,512 INFO L403 AbstractCegarLoop]: === Iteration 35 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 19:01:41,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 19:01:41,512 INFO L85 PathProgramCache]: Analyzing trace with hash 639560738, now seen corresponding path program 30 times [2022-03-20 19:01:41,512 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 19:01:41,512 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1922234838] [2022-03-20 19:01:41,634 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 19:01:41,634 INFO L85 PathProgramCache]: Analyzing trace with hash -1296196232, now seen corresponding path program 1 times [2022-03-20 19:01:41,634 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:01:41,634 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [990235856] [2022-03-20 19:01:41,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:01:41,634 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:01:41,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:01:41,663 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 19:01:41,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:01:41,671 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 19:01:41,671 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 19:01:41,671 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [990235856] [2022-03-20 19:01:41,671 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [990235856] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:01:41,671 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:01:41,672 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 19:01:42,211 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 19:01:42,212 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1922234838] [2022-03-20 19:01:42,212 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1922234838] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:01:42,212 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:01:42,212 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [35] imperfect sequences [] total 35 [2022-03-20 19:01:42,212 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1389798543] [2022-03-20 19:01:42,212 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 19:01:42,213 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-03-20 19:01:42,213 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 19:01:42,213 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-03-20 19:01:42,214 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=1092, Unknown=0, NotChecked=0, Total=1190 [2022-03-20 19:01:42,214 INFO L87 Difference]: Start difference. First operand 56 states and 59 transitions. Second operand has 35 states, 35 states have (on average 1.2285714285714286) internal successors, (43), 34 states have internal predecessors, (43), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 19:01:43,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 19:01:43,170 INFO L93 Difference]: Finished difference Result 111 states and 120 transitions. [2022-03-20 19:01:43,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-03-20 19:01:43,171 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.2285714285714286) internal successors, (43), 34 states have internal predecessors, (43), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 50 [2022-03-20 19:01:43,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 19:01:43,171 INFO L225 Difference]: With dead ends: 111 [2022-03-20 19:01:43,171 INFO L226 Difference]: Without dead ends: 62 [2022-03-20 19:01:43,173 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 496 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=288, Invalid=4134, Unknown=0, NotChecked=0, Total=4422 [2022-03-20 19:01:43,173 INFO L913 BasicCegarLoop]: 19 mSDtfsCounter, 20 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 1307 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 86 SdHoareTripleChecker+Invalid, 1381 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 1307 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-20 19:01:43,173 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 86 Invalid, 1381 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 1307 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-20 19:01:43,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2022-03-20 19:01:43,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 57. [2022-03-20 19:01:43,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 48 states have (on average 1.0833333333333333) internal successors, (52), 49 states have internal predecessors, (52), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-20 19:01:43,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 60 transitions. [2022-03-20 19:01:43,189 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 60 transitions. Word has length 50 [2022-03-20 19:01:43,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 19:01:43,189 INFO L478 AbstractCegarLoop]: Abstraction has 57 states and 60 transitions. [2022-03-20 19:01:43,189 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 1.2285714285714286) internal successors, (43), 34 states have internal predecessors, (43), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 19:01:43,189 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 60 transitions. [2022-03-20 19:01:43,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-03-20 19:01:43,190 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 19:01:43,190 INFO L499 BasicCegarLoop]: trace histogram [31, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 19:01:43,190 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2022-03-20 19:01:43,190 INFO L403 AbstractCegarLoop]: === Iteration 36 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 19:01:43,190 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 19:01:43,190 INFO L85 PathProgramCache]: Analyzing trace with hash -696171006, now seen corresponding path program 31 times [2022-03-20 19:01:43,190 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 19:01:43,190 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [297776525] [2022-03-20 19:01:43,320 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 19:01:43,321 INFO L85 PathProgramCache]: Analyzing trace with hash -1237090888, now seen corresponding path program 1 times [2022-03-20 19:01:43,321 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:01:43,321 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1490170988] [2022-03-20 19:01:43,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:01:43,321 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:01:43,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:01:43,361 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 19:01:43,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:01:43,364 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 19:01:43,364 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 19:01:43,364 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1490170988] [2022-03-20 19:01:43,365 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1490170988] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:01:43,365 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:01:43,365 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 19:01:43,921 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 19:01:43,921 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [297776525] [2022-03-20 19:01:43,921 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [297776525] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:01:43,922 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:01:43,922 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [36] imperfect sequences [] total 36 [2022-03-20 19:01:43,922 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1180251417] [2022-03-20 19:01:43,922 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 19:01:43,922 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-03-20 19:01:43,922 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 19:01:43,922 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-03-20 19:01:43,922 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=1159, Unknown=0, NotChecked=0, Total=1260 [2022-03-20 19:01:43,923 INFO L87 Difference]: Start difference. First operand 57 states and 60 transitions. Second operand has 36 states, 36 states have (on average 1.2222222222222223) internal successors, (44), 35 states have internal predecessors, (44), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 19:01:44,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 19:01:44,837 INFO L93 Difference]: Finished difference Result 113 states and 122 transitions. [2022-03-20 19:01:44,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-03-20 19:01:44,838 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.2222222222222223) internal successors, (44), 35 states have internal predecessors, (44), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 51 [2022-03-20 19:01:44,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 19:01:44,838 INFO L225 Difference]: With dead ends: 113 [2022-03-20 19:01:44,838 INFO L226 Difference]: Without dead ends: 63 [2022-03-20 19:01:44,839 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 528 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=297, Invalid=4395, Unknown=0, NotChecked=0, Total=4692 [2022-03-20 19:01:44,839 INFO L913 BasicCegarLoop]: 19 mSDtfsCounter, 20 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 1206 mSolverCounterSat, 77 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 1283 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 77 IncrementalHoareTripleChecker+Valid, 1206 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-20 19:01:44,839 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 26 Invalid, 1283 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [77 Valid, 1206 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-20 19:01:44,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2022-03-20 19:01:44,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 58. [2022-03-20 19:01:44,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 49 states have (on average 1.0816326530612246) internal successors, (53), 50 states have internal predecessors, (53), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-20 19:01:44,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 61 transitions. [2022-03-20 19:01:44,856 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 61 transitions. Word has length 51 [2022-03-20 19:01:44,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 19:01:44,856 INFO L478 AbstractCegarLoop]: Abstraction has 58 states and 61 transitions. [2022-03-20 19:01:44,857 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 1.2222222222222223) internal successors, (44), 35 states have internal predecessors, (44), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 19:01:44,857 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 61 transitions. [2022-03-20 19:01:44,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-03-20 19:01:44,857 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 19:01:44,857 INFO L499 BasicCegarLoop]: trace histogram [32, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 19:01:44,857 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2022-03-20 19:01:44,857 INFO L403 AbstractCegarLoop]: === Iteration 37 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 19:01:44,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 19:01:44,857 INFO L85 PathProgramCache]: Analyzing trace with hash 845817890, now seen corresponding path program 32 times [2022-03-20 19:01:44,857 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 19:01:44,857 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1974845091] [2022-03-20 19:01:45,033 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 19:01:45,033 INFO L85 PathProgramCache]: Analyzing trace with hash -1177985544, now seen corresponding path program 1 times [2022-03-20 19:01:45,034 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:01:45,034 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [155082289] [2022-03-20 19:01:45,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:01:45,034 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:01:45,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:01:45,066 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 19:01:45,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:01:45,069 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 19:01:45,069 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 19:01:45,069 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [155082289] [2022-03-20 19:01:45,069 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [155082289] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:01:45,069 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:01:45,069 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 19:01:45,670 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 19:01:45,670 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1974845091] [2022-03-20 19:01:45,671 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1974845091] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:01:45,671 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:01:45,671 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [37] imperfect sequences [] total 37 [2022-03-20 19:01:45,671 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [61089407] [2022-03-20 19:01:45,671 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 19:01:45,671 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-03-20 19:01:45,671 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 19:01:45,671 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-03-20 19:01:45,672 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=1228, Unknown=0, NotChecked=0, Total=1332 [2022-03-20 19:01:45,672 INFO L87 Difference]: Start difference. First operand 58 states and 61 transitions. Second operand has 37 states, 37 states have (on average 1.2162162162162162) internal successors, (45), 36 states have internal predecessors, (45), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 19:01:46,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 19:01:46,744 INFO L93 Difference]: Finished difference Result 115 states and 124 transitions. [2022-03-20 19:01:46,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-03-20 19:01:46,744 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.2162162162162162) internal successors, (45), 36 states have internal predecessors, (45), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 52 [2022-03-20 19:01:46,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 19:01:46,745 INFO L225 Difference]: With dead ends: 115 [2022-03-20 19:01:46,745 INFO L226 Difference]: Without dead ends: 64 [2022-03-20 19:01:46,745 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 561 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=306, Invalid=4664, Unknown=0, NotChecked=0, Total=4970 [2022-03-20 19:01:46,746 INFO L913 BasicCegarLoop]: 19 mSDtfsCounter, 20 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 1514 mSolverCounterSat, 79 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 111 SdHoareTripleChecker+Invalid, 1593 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 79 IncrementalHoareTripleChecker+Valid, 1514 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-20 19:01:46,746 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 111 Invalid, 1593 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [79 Valid, 1514 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-20 19:01:46,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2022-03-20 19:01:46,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 59. [2022-03-20 19:01:46,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 50 states have (on average 1.08) internal successors, (54), 51 states have internal predecessors, (54), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-20 19:01:46,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 62 transitions. [2022-03-20 19:01:46,765 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 62 transitions. Word has length 52 [2022-03-20 19:01:46,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 19:01:46,765 INFO L478 AbstractCegarLoop]: Abstraction has 59 states and 62 transitions. [2022-03-20 19:01:46,765 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 1.2162162162162162) internal successors, (45), 36 states have internal predecessors, (45), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 19:01:46,765 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 62 transitions. [2022-03-20 19:01:46,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-03-20 19:01:46,765 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 19:01:46,765 INFO L499 BasicCegarLoop]: trace histogram [33, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 19:01:46,765 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2022-03-20 19:01:46,766 INFO L403 AbstractCegarLoop]: === Iteration 38 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 19:01:46,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 19:01:46,766 INFO L85 PathProgramCache]: Analyzing trace with hash 1402833410, now seen corresponding path program 33 times [2022-03-20 19:01:46,766 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 19:01:46,766 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [502941043] [2022-03-20 19:01:46,935 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 19:01:46,936 INFO L85 PathProgramCache]: Analyzing trace with hash -1118880200, now seen corresponding path program 1 times [2022-03-20 19:01:46,936 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:01:46,936 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [990196049] [2022-03-20 19:01:46,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:01:46,936 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:01:46,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:01:47,006 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 19:01:47,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:01:47,008 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 19:01:47,008 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 19:01:47,009 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [990196049] [2022-03-20 19:01:47,009 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [990196049] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:01:47,009 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:01:47,009 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 19:01:47,655 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 19:01:47,655 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [502941043] [2022-03-20 19:01:47,655 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [502941043] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:01:47,655 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:01:47,655 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [38] imperfect sequences [] total 38 [2022-03-20 19:01:47,655 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1309679967] [2022-03-20 19:01:47,655 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 19:01:47,656 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-03-20 19:01:47,656 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 19:01:47,656 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-03-20 19:01:47,656 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=1299, Unknown=0, NotChecked=0, Total=1406 [2022-03-20 19:01:47,656 INFO L87 Difference]: Start difference. First operand 59 states and 62 transitions. Second operand has 38 states, 38 states have (on average 1.2105263157894737) internal successors, (46), 37 states have internal predecessors, (46), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 19:01:48,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 19:01:48,848 INFO L93 Difference]: Finished difference Result 117 states and 126 transitions. [2022-03-20 19:01:48,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-03-20 19:01:48,849 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 1.2105263157894737) internal successors, (46), 37 states have internal predecessors, (46), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 53 [2022-03-20 19:01:48,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 19:01:48,849 INFO L225 Difference]: With dead ends: 117 [2022-03-20 19:01:48,849 INFO L226 Difference]: Without dead ends: 65 [2022-03-20 19:01:48,850 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 595 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=315, Invalid=4941, Unknown=0, NotChecked=0, Total=5256 [2022-03-20 19:01:48,851 INFO L913 BasicCegarLoop]: 19 mSDtfsCounter, 20 mSDsluCounter, 117 mSDsCounter, 0 mSdLazyCounter, 1656 mSolverCounterSat, 81 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 136 SdHoareTripleChecker+Invalid, 1737 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 81 IncrementalHoareTripleChecker+Valid, 1656 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-20 19:01:48,851 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 136 Invalid, 1737 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [81 Valid, 1656 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-20 19:01:48,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2022-03-20 19:01:48,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 60. [2022-03-20 19:01:48,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 51 states have (on average 1.0784313725490196) internal successors, (55), 52 states have internal predecessors, (55), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-20 19:01:48,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 63 transitions. [2022-03-20 19:01:48,870 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 63 transitions. Word has length 53 [2022-03-20 19:01:48,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 19:01:48,870 INFO L478 AbstractCegarLoop]: Abstraction has 60 states and 63 transitions. [2022-03-20 19:01:48,870 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 1.2105263157894737) internal successors, (46), 37 states have internal predecessors, (46), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 19:01:48,870 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 63 transitions. [2022-03-20 19:01:48,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-03-20 19:01:48,870 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 19:01:48,870 INFO L499 BasicCegarLoop]: trace histogram [34, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 19:01:48,870 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2022-03-20 19:01:48,871 INFO L403 AbstractCegarLoop]: === Iteration 39 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 19:01:48,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 19:01:48,871 INFO L85 PathProgramCache]: Analyzing trace with hash 1490445346, now seen corresponding path program 34 times [2022-03-20 19:01:48,871 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 19:01:48,871 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1109648125] [2022-03-20 19:01:49,018 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 19:01:49,018 INFO L85 PathProgramCache]: Analyzing trace with hash -1059774856, now seen corresponding path program 1 times [2022-03-20 19:01:49,019 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:01:49,019 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1509283601] [2022-03-20 19:01:49,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:01:49,019 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:01:49,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:01:49,048 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 19:01:49,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:01:49,050 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 19:01:49,050 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 19:01:49,051 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1509283601] [2022-03-20 19:01:49,051 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1509283601] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:01:49,051 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:01:49,051 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 19:01:49,712 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 19:01:49,712 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1109648125] [2022-03-20 19:01:49,712 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1109648125] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:01:49,712 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:01:49,712 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [39] imperfect sequences [] total 39 [2022-03-20 19:01:49,713 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [516350808] [2022-03-20 19:01:49,713 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 19:01:49,713 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-03-20 19:01:49,713 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 19:01:49,713 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-03-20 19:01:49,713 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=1372, Unknown=0, NotChecked=0, Total=1482 [2022-03-20 19:01:49,713 INFO L87 Difference]: Start difference. First operand 60 states and 63 transitions. Second operand has 39 states, 39 states have (on average 1.205128205128205) internal successors, (47), 38 states have internal predecessors, (47), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 19:01:50,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 19:01:50,930 INFO L93 Difference]: Finished difference Result 119 states and 128 transitions. [2022-03-20 19:01:50,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-03-20 19:01:50,931 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.205128205128205) internal successors, (47), 38 states have internal predecessors, (47), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 54 [2022-03-20 19:01:50,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 19:01:50,932 INFO L225 Difference]: With dead ends: 119 [2022-03-20 19:01:50,932 INFO L226 Difference]: Without dead ends: 66 [2022-03-20 19:01:50,933 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 630 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=324, Invalid=5226, Unknown=0, NotChecked=0, Total=5550 [2022-03-20 19:01:50,933 INFO L913 BasicCegarLoop]: 19 mSDtfsCounter, 20 mSDsluCounter, 132 mSDsCounter, 0 mSdLazyCounter, 1772 mSolverCounterSat, 83 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 151 SdHoareTripleChecker+Invalid, 1855 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 83 IncrementalHoareTripleChecker+Valid, 1772 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-20 19:01:50,934 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 151 Invalid, 1855 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [83 Valid, 1772 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-20 19:01:50,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2022-03-20 19:01:50,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 61. [2022-03-20 19:01:50,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 52 states have (on average 1.0769230769230769) internal successors, (56), 53 states have internal predecessors, (56), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-20 19:01:50,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 64 transitions. [2022-03-20 19:01:50,969 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 64 transitions. Word has length 54 [2022-03-20 19:01:50,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 19:01:50,969 INFO L478 AbstractCegarLoop]: Abstraction has 61 states and 64 transitions. [2022-03-20 19:01:50,969 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 1.205128205128205) internal successors, (47), 38 states have internal predecessors, (47), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 19:01:50,969 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 64 transitions. [2022-03-20 19:01:50,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-03-20 19:01:50,969 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 19:01:50,970 INFO L499 BasicCegarLoop]: trace histogram [35, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 19:01:50,970 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2022-03-20 19:01:50,970 INFO L403 AbstractCegarLoop]: === Iteration 40 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 19:01:50,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 19:01:50,970 INFO L85 PathProgramCache]: Analyzing trace with hash -88551934, now seen corresponding path program 35 times [2022-03-20 19:01:50,970 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 19:01:50,970 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [146031942] [2022-03-20 19:01:51,125 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 19:01:51,125 INFO L85 PathProgramCache]: Analyzing trace with hash -1000669512, now seen corresponding path program 1 times [2022-03-20 19:01:51,126 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:01:51,126 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1285778582] [2022-03-20 19:01:51,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:01:51,126 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:01:51,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:01:51,156 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 19:01:51,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:01:51,160 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 19:01:51,160 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 19:01:51,160 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1285778582] [2022-03-20 19:01:51,160 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1285778582] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:01:51,160 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:01:51,160 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 19:01:51,830 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 19:01:51,831 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [146031942] [2022-03-20 19:01:51,831 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [146031942] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:01:51,831 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:01:51,831 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [40] imperfect sequences [] total 40 [2022-03-20 19:01:51,831 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1236198926] [2022-03-20 19:01:51,831 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 19:01:51,831 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-03-20 19:01:51,831 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 19:01:51,831 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-03-20 19:01:51,832 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=1447, Unknown=0, NotChecked=0, Total=1560 [2022-03-20 19:01:51,832 INFO L87 Difference]: Start difference. First operand 61 states and 64 transitions. Second operand has 40 states, 40 states have (on average 1.2) internal successors, (48), 39 states have internal predecessors, (48), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 19:01:53,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 19:01:53,007 INFO L93 Difference]: Finished difference Result 121 states and 130 transitions. [2022-03-20 19:01:53,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-03-20 19:01:53,008 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 1.2) internal successors, (48), 39 states have internal predecessors, (48), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 55 [2022-03-20 19:01:53,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 19:01:53,008 INFO L225 Difference]: With dead ends: 121 [2022-03-20 19:01:53,008 INFO L226 Difference]: Without dead ends: 67 [2022-03-20 19:01:53,009 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 666 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=333, Invalid=5519, Unknown=0, NotChecked=0, Total=5852 [2022-03-20 19:01:53,009 INFO L913 BasicCegarLoop]: 19 mSDtfsCounter, 20 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 1596 mSolverCounterSat, 85 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 1681 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 85 IncrementalHoareTripleChecker+Valid, 1596 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-20 19:01:53,009 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 61 Invalid, 1681 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [85 Valid, 1596 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-20 19:01:53,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2022-03-20 19:01:53,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 62. [2022-03-20 19:01:53,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 53 states have (on average 1.0754716981132075) internal successors, (57), 54 states have internal predecessors, (57), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-20 19:01:53,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 65 transitions. [2022-03-20 19:01:53,033 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 65 transitions. Word has length 55 [2022-03-20 19:01:53,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 19:01:53,033 INFO L478 AbstractCegarLoop]: Abstraction has 62 states and 65 transitions. [2022-03-20 19:01:53,033 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 1.2) internal successors, (48), 39 states have internal predecessors, (48), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 19:01:53,033 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 65 transitions. [2022-03-20 19:01:53,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-03-20 19:01:53,033 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 19:01:53,033 INFO L499 BasicCegarLoop]: trace histogram [36, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 19:01:53,033 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2022-03-20 19:01:53,033 INFO L403 AbstractCegarLoop]: === Iteration 41 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 19:01:53,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 19:01:53,034 INFO L85 PathProgramCache]: Analyzing trace with hash -1792827358, now seen corresponding path program 36 times [2022-03-20 19:01:53,034 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 19:01:53,034 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [143196944] [2022-03-20 19:01:53,178 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 19:01:53,178 INFO L85 PathProgramCache]: Analyzing trace with hash -941564168, now seen corresponding path program 1 times [2022-03-20 19:01:53,178 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:01:53,178 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1096264129] [2022-03-20 19:01:53,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:01:53,179 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:01:53,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:01:53,220 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 19:01:53,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:01:53,223 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 19:01:53,223 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 19:01:53,223 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1096264129] [2022-03-20 19:01:53,223 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1096264129] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:01:53,223 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:01:53,223 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 19:01:53,942 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 19:01:53,942 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [143196944] [2022-03-20 19:01:53,942 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [143196944] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:01:53,942 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:01:53,943 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [41] imperfect sequences [] total 41 [2022-03-20 19:01:53,943 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [821444065] [2022-03-20 19:01:53,943 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 19:01:53,943 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-03-20 19:01:53,943 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 19:01:53,943 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-03-20 19:01:53,943 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=1524, Unknown=0, NotChecked=0, Total=1640 [2022-03-20 19:01:53,944 INFO L87 Difference]: Start difference. First operand 62 states and 65 transitions. Second operand has 41 states, 41 states have (on average 1.1951219512195121) internal successors, (49), 40 states have internal predecessors, (49), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 19:01:55,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 19:01:55,166 INFO L93 Difference]: Finished difference Result 123 states and 132 transitions. [2022-03-20 19:01:55,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-03-20 19:01:55,167 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.1951219512195121) internal successors, (49), 40 states have internal predecessors, (49), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 56 [2022-03-20 19:01:55,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 19:01:55,167 INFO L225 Difference]: With dead ends: 123 [2022-03-20 19:01:55,167 INFO L226 Difference]: Without dead ends: 68 [2022-03-20 19:01:55,168 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 703 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=342, Invalid=5820, Unknown=0, NotChecked=0, Total=6162 [2022-03-20 19:01:55,169 INFO L913 BasicCegarLoop]: 19 mSDtfsCounter, 20 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 1688 mSolverCounterSat, 87 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 1775 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 87 IncrementalHoareTripleChecker+Valid, 1688 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-20 19:01:55,169 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 66 Invalid, 1775 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [87 Valid, 1688 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-20 19:01:55,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2022-03-20 19:01:55,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 63. [2022-03-20 19:01:55,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 54 states have (on average 1.0740740740740742) internal successors, (58), 55 states have internal predecessors, (58), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-20 19:01:55,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 66 transitions. [2022-03-20 19:01:55,193 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 66 transitions. Word has length 56 [2022-03-20 19:01:55,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 19:01:55,193 INFO L478 AbstractCegarLoop]: Abstraction has 63 states and 66 transitions. [2022-03-20 19:01:55,193 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.1951219512195121) internal successors, (49), 40 states have internal predecessors, (49), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 19:01:55,193 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 66 transitions. [2022-03-20 19:01:55,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-03-20 19:01:55,193 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 19:01:55,194 INFO L499 BasicCegarLoop]: trace histogram [37, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 19:01:55,194 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2022-03-20 19:01:55,194 INFO L403 AbstractCegarLoop]: === Iteration 42 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 19:01:55,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 19:01:55,194 INFO L85 PathProgramCache]: Analyzing trace with hash 1209209346, now seen corresponding path program 37 times [2022-03-20 19:01:55,194 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 19:01:55,194 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1086295854] [2022-03-20 19:01:55,358 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 19:01:55,358 INFO L85 PathProgramCache]: Analyzing trace with hash -882458824, now seen corresponding path program 1 times [2022-03-20 19:01:55,359 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:01:55,359 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1798034421] [2022-03-20 19:01:55,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:01:55,359 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:01:55,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:01:55,392 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 19:01:55,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:01:55,395 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 19:01:55,395 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 19:01:55,395 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1798034421] [2022-03-20 19:01:55,395 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1798034421] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:01:55,395 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:01:55,395 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 19:01:56,146 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 19:01:56,146 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1086295854] [2022-03-20 19:01:56,146 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1086295854] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:01:56,146 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:01:56,146 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [42] imperfect sequences [] total 42 [2022-03-20 19:01:56,146 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1875169380] [2022-03-20 19:01:56,146 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 19:01:56,146 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-03-20 19:01:56,146 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 19:01:56,147 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-03-20 19:01:56,147 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=1603, Unknown=0, NotChecked=0, Total=1722 [2022-03-20 19:01:56,147 INFO L87 Difference]: Start difference. First operand 63 states and 66 transitions. Second operand has 42 states, 42 states have (on average 1.1904761904761905) internal successors, (50), 41 states have internal predecessors, (50), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 19:01:57,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 19:01:57,544 INFO L93 Difference]: Finished difference Result 125 states and 134 transitions. [2022-03-20 19:01:57,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-03-20 19:01:57,545 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 1.1904761904761905) internal successors, (50), 41 states have internal predecessors, (50), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 57 [2022-03-20 19:01:57,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 19:01:57,545 INFO L225 Difference]: With dead ends: 125 [2022-03-20 19:01:57,545 INFO L226 Difference]: Without dead ends: 69 [2022-03-20 19:01:57,546 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 741 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=351, Invalid=6129, Unknown=0, NotChecked=0, Total=6480 [2022-03-20 19:01:57,547 INFO L913 BasicCegarLoop]: 19 mSDtfsCounter, 20 mSDsluCounter, 182 mSDsCounter, 0 mSdLazyCounter, 2147 mSolverCounterSat, 88 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 201 SdHoareTripleChecker+Invalid, 2235 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 88 IncrementalHoareTripleChecker+Valid, 2147 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-20 19:01:57,547 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 201 Invalid, 2235 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [88 Valid, 2147 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-03-20 19:01:57,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2022-03-20 19:01:57,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 64. [2022-03-20 19:01:57,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 55 states have (on average 1.0727272727272728) internal successors, (59), 56 states have internal predecessors, (59), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-20 19:01:57,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 67 transitions. [2022-03-20 19:01:57,573 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 67 transitions. Word has length 57 [2022-03-20 19:01:57,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 19:01:57,574 INFO L478 AbstractCegarLoop]: Abstraction has 64 states and 67 transitions. [2022-03-20 19:01:57,574 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 1.1904761904761905) internal successors, (50), 41 states have internal predecessors, (50), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 19:01:57,574 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 67 transitions. [2022-03-20 19:01:57,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-03-20 19:01:57,574 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 19:01:57,574 INFO L499 BasicCegarLoop]: trace histogram [38, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 19:01:57,574 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2022-03-20 19:01:57,574 INFO L403 AbstractCegarLoop]: === Iteration 43 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 19:01:57,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 19:01:57,575 INFO L85 PathProgramCache]: Analyzing trace with hash -216933342, now seen corresponding path program 38 times [2022-03-20 19:01:57,575 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 19:01:57,575 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [82300684] [2022-03-20 19:01:57,722 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 19:01:57,723 INFO L85 PathProgramCache]: Analyzing trace with hash -823353480, now seen corresponding path program 1 times [2022-03-20 19:01:57,723 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:01:57,723 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1708354633] [2022-03-20 19:01:57,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:01:57,723 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:01:57,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:01:57,750 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 19:01:57,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:01:57,753 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 19:01:57,753 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 19:01:57,754 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1708354633] [2022-03-20 19:01:57,754 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1708354633] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:01:57,754 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:01:57,754 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 19:01:58,474 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 19:01:58,474 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [82300684] [2022-03-20 19:01:58,474 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [82300684] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:01:58,474 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:01:58,474 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [43] imperfect sequences [] total 43 [2022-03-20 19:01:58,474 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [297024978] [2022-03-20 19:01:58,474 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 19:01:58,475 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-03-20 19:01:58,475 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 19:01:58,475 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-03-20 19:01:58,475 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=1684, Unknown=0, NotChecked=0, Total=1806 [2022-03-20 19:01:58,475 INFO L87 Difference]: Start difference. First operand 64 states and 67 transitions. Second operand has 43 states, 43 states have (on average 1.186046511627907) internal successors, (51), 42 states have internal predecessors, (51), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 19:01:59,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 19:01:59,818 INFO L93 Difference]: Finished difference Result 127 states and 136 transitions. [2022-03-20 19:01:59,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-03-20 19:01:59,818 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.186046511627907) internal successors, (51), 42 states have internal predecessors, (51), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 58 [2022-03-20 19:01:59,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 19:01:59,819 INFO L225 Difference]: With dead ends: 127 [2022-03-20 19:01:59,819 INFO L226 Difference]: Without dead ends: 70 [2022-03-20 19:01:59,820 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 780 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=360, Invalid=6446, Unknown=0, NotChecked=0, Total=6806 [2022-03-20 19:01:59,821 INFO L913 BasicCegarLoop]: 19 mSDtfsCounter, 20 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 1864 mSolverCounterSat, 91 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 71 SdHoareTripleChecker+Invalid, 1955 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 91 IncrementalHoareTripleChecker+Valid, 1864 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-20 19:01:59,821 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 71 Invalid, 1955 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [91 Valid, 1864 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-20 19:01:59,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2022-03-20 19:01:59,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 65. [2022-03-20 19:01:59,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 56 states have (on average 1.0714285714285714) internal successors, (60), 57 states have internal predecessors, (60), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-20 19:01:59,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 68 transitions. [2022-03-20 19:01:59,848 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 68 transitions. Word has length 58 [2022-03-20 19:01:59,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 19:01:59,848 INFO L478 AbstractCegarLoop]: Abstraction has 65 states and 68 transitions. [2022-03-20 19:01:59,848 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 1.186046511627907) internal successors, (51), 42 states have internal predecessors, (51), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 19:01:59,848 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 68 transitions. [2022-03-20 19:01:59,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-03-20 19:01:59,849 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 19:01:59,849 INFO L499 BasicCegarLoop]: trace histogram [39, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 19:01:59,849 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2022-03-20 19:01:59,849 INFO L403 AbstractCegarLoop]: === Iteration 44 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 19:01:59,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 19:01:59,849 INFO L85 PathProgramCache]: Analyzing trace with hash -1477683710, now seen corresponding path program 39 times [2022-03-20 19:01:59,849 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 19:01:59,850 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1536082065] [2022-03-20 19:01:59,997 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 19:01:59,998 INFO L85 PathProgramCache]: Analyzing trace with hash -764248136, now seen corresponding path program 1 times [2022-03-20 19:01:59,998 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:01:59,998 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1938527237] [2022-03-20 19:01:59,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:01:59,998 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:02:00,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:02:00,041 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 19:02:00,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:02:00,043 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 19:02:00,044 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 19:02:00,044 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1938527237] [2022-03-20 19:02:00,044 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1938527237] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:02:00,044 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:02:00,044 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 19:02:00,831 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 19:02:00,831 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1536082065] [2022-03-20 19:02:00,831 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1536082065] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:02:00,831 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:02:00,831 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [44] imperfect sequences [] total 44 [2022-03-20 19:02:00,831 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [550709981] [2022-03-20 19:02:00,831 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 19:02:00,831 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-03-20 19:02:00,831 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 19:02:00,832 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-03-20 19:02:00,832 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=1767, Unknown=0, NotChecked=0, Total=1892 [2022-03-20 19:02:00,832 INFO L87 Difference]: Start difference. First operand 65 states and 68 transitions. Second operand has 44 states, 44 states have (on average 1.1818181818181819) internal successors, (52), 43 states have internal predecessors, (52), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 19:02:02,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 19:02:02,470 INFO L93 Difference]: Finished difference Result 129 states and 138 transitions. [2022-03-20 19:02:02,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-03-20 19:02:02,471 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 1.1818181818181819) internal successors, (52), 43 states have internal predecessors, (52), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 59 [2022-03-20 19:02:02,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 19:02:02,471 INFO L225 Difference]: With dead ends: 129 [2022-03-20 19:02:02,471 INFO L226 Difference]: Without dead ends: 71 [2022-03-20 19:02:02,472 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 820 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=369, Invalid=6771, Unknown=0, NotChecked=0, Total=7140 [2022-03-20 19:02:02,472 INFO L913 BasicCegarLoop]: 19 mSDtfsCounter, 20 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 1850 mSolverCounterSat, 93 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 1943 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 93 IncrementalHoareTripleChecker+Valid, 1850 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-20 19:02:02,472 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 36 Invalid, 1943 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [93 Valid, 1850 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-03-20 19:02:02,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2022-03-20 19:02:02,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 66. [2022-03-20 19:02:02,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 57 states have (on average 1.0701754385964912) internal successors, (61), 58 states have internal predecessors, (61), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-20 19:02:02,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 69 transitions. [2022-03-20 19:02:02,500 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 69 transitions. Word has length 59 [2022-03-20 19:02:02,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 19:02:02,500 INFO L478 AbstractCegarLoop]: Abstraction has 66 states and 69 transitions. [2022-03-20 19:02:02,501 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 1.1818181818181819) internal successors, (52), 43 states have internal predecessors, (52), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 19:02:02,501 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 69 transitions. [2022-03-20 19:02:02,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-03-20 19:02:02,501 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 19:02:02,501 INFO L499 BasicCegarLoop]: trace histogram [40, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 19:02:02,501 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2022-03-20 19:02:02,501 INFO L403 AbstractCegarLoop]: === Iteration 45 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 19:02:02,502 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 19:02:02,502 INFO L85 PathProgramCache]: Analyzing trace with hash -1906239454, now seen corresponding path program 40 times [2022-03-20 19:02:02,502 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 19:02:02,502 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [517409982] [2022-03-20 19:02:02,668 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 19:02:02,668 INFO L85 PathProgramCache]: Analyzing trace with hash -705142792, now seen corresponding path program 1 times [2022-03-20 19:02:02,668 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:02:02,668 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [687635086] [2022-03-20 19:02:02,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:02:02,668 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:02:02,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:02:02,694 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 19:02:02,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:02:02,697 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 19:02:02,697 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 19:02:02,697 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [687635086] [2022-03-20 19:02:02,697 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [687635086] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:02:02,697 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:02:02,697 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 19:02:03,558 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 19:02:03,558 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [517409982] [2022-03-20 19:02:03,558 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [517409982] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:02:03,558 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:02:03,558 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [45] imperfect sequences [] total 45 [2022-03-20 19:02:03,558 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1795354904] [2022-03-20 19:02:03,558 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 19:02:03,558 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-03-20 19:02:03,558 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 19:02:03,559 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-03-20 19:02:03,559 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=1852, Unknown=0, NotChecked=0, Total=1980 [2022-03-20 19:02:03,559 INFO L87 Difference]: Start difference. First operand 66 states and 69 transitions. Second operand has 45 states, 45 states have (on average 1.1777777777777778) internal successors, (53), 44 states have internal predecessors, (53), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 19:02:04,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 19:02:04,969 INFO L93 Difference]: Finished difference Result 131 states and 140 transitions. [2022-03-20 19:02:04,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-03-20 19:02:04,969 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 1.1777777777777778) internal successors, (53), 44 states have internal predecessors, (53), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 60 [2022-03-20 19:02:04,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 19:02:04,970 INFO L225 Difference]: With dead ends: 131 [2022-03-20 19:02:04,970 INFO L226 Difference]: Without dead ends: 72 [2022-03-20 19:02:04,971 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 861 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=378, Invalid=7104, Unknown=0, NotChecked=0, Total=7482 [2022-03-20 19:02:04,971 INFO L913 BasicCegarLoop]: 19 mSDtfsCounter, 20 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 1964 mSolverCounterSat, 95 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 2059 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 95 IncrementalHoareTripleChecker+Valid, 1964 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-20 19:02:04,971 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 46 Invalid, 2059 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [95 Valid, 1964 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-20 19:02:04,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2022-03-20 19:02:05,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 67. [2022-03-20 19:02:05,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 58 states have (on average 1.0689655172413792) internal successors, (62), 59 states have internal predecessors, (62), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-20 19:02:05,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 70 transitions. [2022-03-20 19:02:05,005 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 70 transitions. Word has length 60 [2022-03-20 19:02:05,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 19:02:05,006 INFO L478 AbstractCegarLoop]: Abstraction has 67 states and 70 transitions. [2022-03-20 19:02:05,006 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 1.1777777777777778) internal successors, (53), 44 states have internal predecessors, (53), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 19:02:05,006 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 70 transitions. [2022-03-20 19:02:05,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-03-20 19:02:05,006 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 19:02:05,006 INFO L499 BasicCegarLoop]: trace histogram [41, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 19:02:05,006 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2022-03-20 19:02:05,006 INFO L403 AbstractCegarLoop]: === Iteration 46 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 19:02:05,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 19:02:05,007 INFO L85 PathProgramCache]: Analyzing trace with hash 1988401666, now seen corresponding path program 41 times [2022-03-20 19:02:05,007 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 19:02:05,007 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1311951946] [2022-03-20 19:02:05,150 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 19:02:05,151 INFO L85 PathProgramCache]: Analyzing trace with hash -646037448, now seen corresponding path program 1 times [2022-03-20 19:02:05,151 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:02:05,151 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [698686455] [2022-03-20 19:02:05,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:02:05,151 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:02:05,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:02:05,180 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 19:02:05,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:02:05,182 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 19:02:05,182 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 19:02:05,182 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [698686455] [2022-03-20 19:02:05,182 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [698686455] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:02:05,182 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:02:05,182 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 19:02:06,060 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 19:02:06,060 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1311951946] [2022-03-20 19:02:06,060 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1311951946] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:02:06,060 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:02:06,060 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [46] imperfect sequences [] total 46 [2022-03-20 19:02:06,060 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1746650867] [2022-03-20 19:02:06,060 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 19:02:06,060 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-03-20 19:02:06,060 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 19:02:06,061 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-03-20 19:02:06,061 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=1939, Unknown=0, NotChecked=0, Total=2070 [2022-03-20 19:02:06,061 INFO L87 Difference]: Start difference. First operand 67 states and 70 transitions. Second operand has 46 states, 46 states have (on average 1.173913043478261) internal successors, (54), 45 states have internal predecessors, (54), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 19:02:07,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 19:02:07,563 INFO L93 Difference]: Finished difference Result 133 states and 142 transitions. [2022-03-20 19:02:07,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-03-20 19:02:07,563 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 1.173913043478261) internal successors, (54), 45 states have internal predecessors, (54), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 61 [2022-03-20 19:02:07,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 19:02:07,564 INFO L225 Difference]: With dead ends: 133 [2022-03-20 19:02:07,564 INFO L226 Difference]: Without dead ends: 73 [2022-03-20 19:02:07,565 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 903 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=387, Invalid=7445, Unknown=0, NotChecked=0, Total=7832 [2022-03-20 19:02:07,566 INFO L913 BasicCegarLoop]: 19 mSDtfsCounter, 20 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 1996 mSolverCounterSat, 97 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 2093 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 97 IncrementalHoareTripleChecker+Valid, 1996 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-20 19:02:07,566 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 26 Invalid, 2093 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [97 Valid, 1996 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-20 19:02:07,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2022-03-20 19:02:07,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 68. [2022-03-20 19:02:07,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 59 states have (on average 1.0677966101694916) internal successors, (63), 60 states have internal predecessors, (63), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-20 19:02:07,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 71 transitions. [2022-03-20 19:02:07,593 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 71 transitions. Word has length 61 [2022-03-20 19:02:07,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 19:02:07,593 INFO L478 AbstractCegarLoop]: Abstraction has 68 states and 71 transitions. [2022-03-20 19:02:07,594 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 1.173913043478261) internal successors, (54), 45 states have internal predecessors, (54), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 19:02:07,594 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 71 transitions. [2022-03-20 19:02:07,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-03-20 19:02:07,594 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 19:02:07,594 INFO L499 BasicCegarLoop]: trace histogram [42, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 19:02:07,594 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2022-03-20 19:02:07,594 INFO L403 AbstractCegarLoop]: === Iteration 47 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 19:02:07,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 19:02:07,594 INFO L85 PathProgramCache]: Analyzing trace with hash -1831775198, now seen corresponding path program 42 times [2022-03-20 19:02:07,595 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 19:02:07,595 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1481309320] [2022-03-20 19:02:07,777 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 19:02:07,777 INFO L85 PathProgramCache]: Analyzing trace with hash -586932104, now seen corresponding path program 1 times [2022-03-20 19:02:07,778 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:02:07,778 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1466657014] [2022-03-20 19:02:07,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:02:07,778 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:02:07,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:02:07,817 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 19:02:07,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:02:07,821 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 19:02:07,821 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 19:02:07,821 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1466657014] [2022-03-20 19:02:07,821 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1466657014] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:02:07,821 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:02:07,821 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 19:02:08,723 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 19:02:08,723 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1481309320] [2022-03-20 19:02:08,723 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1481309320] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:02:08,723 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:02:08,723 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [47] imperfect sequences [] total 47 [2022-03-20 19:02:08,724 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1219883800] [2022-03-20 19:02:08,724 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 19:02:08,724 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2022-03-20 19:02:08,724 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 19:02:08,724 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2022-03-20 19:02:08,725 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=2028, Unknown=0, NotChecked=0, Total=2162 [2022-03-20 19:02:08,725 INFO L87 Difference]: Start difference. First operand 68 states and 71 transitions. Second operand has 47 states, 47 states have (on average 1.1702127659574468) internal successors, (55), 46 states have internal predecessors, (55), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 19:02:10,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 19:02:10,335 INFO L93 Difference]: Finished difference Result 135 states and 144 transitions. [2022-03-20 19:02:10,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2022-03-20 19:02:10,335 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 1.1702127659574468) internal successors, (55), 46 states have internal predecessors, (55), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 62 [2022-03-20 19:02:10,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 19:02:10,336 INFO L225 Difference]: With dead ends: 135 [2022-03-20 19:02:10,336 INFO L226 Difference]: Without dead ends: 74 [2022-03-20 19:02:10,340 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 946 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=396, Invalid=7794, Unknown=0, NotChecked=0, Total=8190 [2022-03-20 19:02:10,341 INFO L913 BasicCegarLoop]: 19 mSDtfsCounter, 20 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 2269 mSolverCounterSat, 98 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 91 SdHoareTripleChecker+Invalid, 2367 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 98 IncrementalHoareTripleChecker+Valid, 2269 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-20 19:02:10,342 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 91 Invalid, 2367 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [98 Valid, 2269 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-03-20 19:02:10,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2022-03-20 19:02:10,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 69. [2022-03-20 19:02:10,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 60 states have (on average 1.0666666666666667) internal successors, (64), 61 states have internal predecessors, (64), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-20 19:02:10,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 72 transitions. [2022-03-20 19:02:10,372 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 72 transitions. Word has length 62 [2022-03-20 19:02:10,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 19:02:10,372 INFO L478 AbstractCegarLoop]: Abstraction has 69 states and 72 transitions. [2022-03-20 19:02:10,373 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 1.1702127659574468) internal successors, (55), 46 states have internal predecessors, (55), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 19:02:10,373 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 72 transitions. [2022-03-20 19:02:10,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-03-20 19:02:10,373 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 19:02:10,373 INFO L499 BasicCegarLoop]: trace histogram [43, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 19:02:10,373 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2022-03-20 19:02:10,373 INFO L403 AbstractCegarLoop]: === Iteration 48 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 19:02:10,374 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 19:02:10,374 INFO L85 PathProgramCache]: Analyzing trace with hash 1826306, now seen corresponding path program 43 times [2022-03-20 19:02:10,374 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 19:02:10,374 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1546852665] [2022-03-20 19:02:10,583 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 19:02:10,584 INFO L85 PathProgramCache]: Analyzing trace with hash -527826760, now seen corresponding path program 1 times [2022-03-20 19:02:10,584 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:02:10,584 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [701720948] [2022-03-20 19:02:10,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:02:10,585 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:02:10,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:02:10,619 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 19:02:10,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:02:10,623 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 19:02:10,623 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 19:02:10,623 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [701720948] [2022-03-20 19:02:10,624 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [701720948] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:02:10,624 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:02:10,624 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 19:02:11,563 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 19:02:11,563 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1546852665] [2022-03-20 19:02:11,563 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1546852665] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:02:11,563 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:02:11,563 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [48] imperfect sequences [] total 48 [2022-03-20 19:02:11,563 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [853527517] [2022-03-20 19:02:11,563 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 19:02:11,564 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2022-03-20 19:02:11,564 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 19:02:11,564 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2022-03-20 19:02:11,564 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=2119, Unknown=0, NotChecked=0, Total=2256 [2022-03-20 19:02:11,564 INFO L87 Difference]: Start difference. First operand 69 states and 72 transitions. Second operand has 48 states, 48 states have (on average 1.1666666666666667) internal successors, (56), 47 states have internal predecessors, (56), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 19:02:13,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 19:02:13,225 INFO L93 Difference]: Finished difference Result 137 states and 146 transitions. [2022-03-20 19:02:13,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-03-20 19:02:13,225 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 1.1666666666666667) internal successors, (56), 47 states have internal predecessors, (56), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 63 [2022-03-20 19:02:13,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 19:02:13,226 INFO L225 Difference]: With dead ends: 137 [2022-03-20 19:02:13,226 INFO L226 Difference]: Without dead ends: 75 [2022-03-20 19:02:13,227 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 990 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=405, Invalid=8151, Unknown=0, NotChecked=0, Total=8556 [2022-03-20 19:02:13,227 INFO L913 BasicCegarLoop]: 19 mSDtfsCounter, 20 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 2346 mSolverCounterSat, 101 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 86 SdHoareTripleChecker+Invalid, 2447 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 101 IncrementalHoareTripleChecker+Valid, 2346 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-03-20 19:02:13,227 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 86 Invalid, 2447 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [101 Valid, 2346 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-03-20 19:02:13,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2022-03-20 19:02:13,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 70. [2022-03-20 19:02:13,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 61 states have (on average 1.0655737704918034) internal successors, (65), 62 states have internal predecessors, (65), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-20 19:02:13,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 73 transitions. [2022-03-20 19:02:13,262 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 73 transitions. Word has length 63 [2022-03-20 19:02:13,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 19:02:13,262 INFO L478 AbstractCegarLoop]: Abstraction has 70 states and 73 transitions. [2022-03-20 19:02:13,262 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 1.1666666666666667) internal successors, (56), 47 states have internal predecessors, (56), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 19:02:13,262 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 73 transitions. [2022-03-20 19:02:13,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-03-20 19:02:13,262 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 19:02:13,262 INFO L499 BasicCegarLoop]: trace histogram [44, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 19:02:13,262 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2022-03-20 19:02:13,263 INFO L403 AbstractCegarLoop]: === Iteration 49 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 19:02:13,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 19:02:13,263 INFO L85 PathProgramCache]: Analyzing trace with hash 1008898082, now seen corresponding path program 44 times [2022-03-20 19:02:13,263 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 19:02:13,263 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1830953967] [2022-03-20 19:02:13,435 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 19:02:13,435 INFO L85 PathProgramCache]: Analyzing trace with hash -468721416, now seen corresponding path program 1 times [2022-03-20 19:02:13,435 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:02:13,435 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1140960952] [2022-03-20 19:02:13,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:02:13,436 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:02:13,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:02:13,475 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 19:02:13,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:02:13,478 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 19:02:13,478 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 19:02:13,478 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1140960952] [2022-03-20 19:02:13,478 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1140960952] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:02:13,478 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:02:13,478 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 19:02:14,448 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 19:02:14,448 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1830953967] [2022-03-20 19:02:14,448 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1830953967] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:02:14,448 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:02:14,448 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [49] imperfect sequences [] total 49 [2022-03-20 19:02:14,448 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1207960329] [2022-03-20 19:02:14,448 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 19:02:14,448 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2022-03-20 19:02:14,448 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 19:02:14,449 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2022-03-20 19:02:14,449 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=2212, Unknown=0, NotChecked=0, Total=2352 [2022-03-20 19:02:14,449 INFO L87 Difference]: Start difference. First operand 70 states and 73 transitions. Second operand has 49 states, 49 states have (on average 1.163265306122449) internal successors, (57), 48 states have internal predecessors, (57), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 19:02:16,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 19:02:16,294 INFO L93 Difference]: Finished difference Result 139 states and 148 transitions. [2022-03-20 19:02:16,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-03-20 19:02:16,295 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 1.163265306122449) internal successors, (57), 48 states have internal predecessors, (57), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 64 [2022-03-20 19:02:16,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 19:02:16,296 INFO L225 Difference]: With dead ends: 139 [2022-03-20 19:02:16,296 INFO L226 Difference]: Without dead ends: 76 [2022-03-20 19:02:16,297 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1035 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=414, Invalid=8516, Unknown=0, NotChecked=0, Total=8930 [2022-03-20 19:02:16,297 INFO L913 BasicCegarLoop]: 19 mSDtfsCounter, 20 mSDsluCounter, 197 mSDsCounter, 0 mSdLazyCounter, 2805 mSolverCounterSat, 102 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 216 SdHoareTripleChecker+Invalid, 2907 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 102 IncrementalHoareTripleChecker+Valid, 2805 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-03-20 19:02:16,298 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 216 Invalid, 2907 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [102 Valid, 2805 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-03-20 19:02:16,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2022-03-20 19:02:16,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 71. [2022-03-20 19:02:16,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 62 states have (on average 1.064516129032258) internal successors, (66), 63 states have internal predecessors, (66), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-20 19:02:16,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 74 transitions. [2022-03-20 19:02:16,330 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 74 transitions. Word has length 64 [2022-03-20 19:02:16,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 19:02:16,330 INFO L478 AbstractCegarLoop]: Abstraction has 71 states and 74 transitions. [2022-03-20 19:02:16,330 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 1.163265306122449) internal successors, (57), 48 states have internal predecessors, (57), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 19:02:16,331 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 74 transitions. [2022-03-20 19:02:16,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-03-20 19:02:16,331 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 19:02:16,331 INFO L499 BasicCegarLoop]: trace histogram [45, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 19:02:16,331 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2022-03-20 19:02:16,331 INFO L403 AbstractCegarLoop]: === Iteration 50 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 19:02:16,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 19:02:16,332 INFO L85 PathProgramCache]: Analyzing trace with hash -2131615230, now seen corresponding path program 45 times [2022-03-20 19:02:16,332 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 19:02:16,332 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [603814408] [2022-03-20 19:02:16,490 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 19:02:16,490 INFO L85 PathProgramCache]: Analyzing trace with hash -409616072, now seen corresponding path program 1 times [2022-03-20 19:02:16,490 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:02:16,490 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1789771944] [2022-03-20 19:02:16,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:02:16,490 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:02:16,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:02:16,530 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 19:02:16,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:02:16,533 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 19:02:16,533 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 19:02:16,533 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1789771944] [2022-03-20 19:02:16,533 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1789771944] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:02:16,533 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:02:16,533 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 19:02:17,554 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 19:02:17,554 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [603814408] [2022-03-20 19:02:17,554 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [603814408] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:02:17,554 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:02:17,554 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [50] imperfect sequences [] total 50 [2022-03-20 19:02:17,555 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [24905110] [2022-03-20 19:02:17,555 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 19:02:17,555 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2022-03-20 19:02:17,555 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 19:02:17,555 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2022-03-20 19:02:17,555 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=2307, Unknown=0, NotChecked=0, Total=2450 [2022-03-20 19:02:17,555 INFO L87 Difference]: Start difference. First operand 71 states and 74 transitions. Second operand has 50 states, 50 states have (on average 1.16) internal successors, (58), 49 states have internal predecessors, (58), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 19:02:19,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 19:02:19,344 INFO L93 Difference]: Finished difference Result 141 states and 150 transitions. [2022-03-20 19:02:19,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-03-20 19:02:19,344 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 1.16) internal successors, (58), 49 states have internal predecessors, (58), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 65 [2022-03-20 19:02:19,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 19:02:19,345 INFO L225 Difference]: With dead ends: 141 [2022-03-20 19:02:19,345 INFO L226 Difference]: Without dead ends: 77 [2022-03-20 19:02:19,346 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1081 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=423, Invalid=8889, Unknown=0, NotChecked=0, Total=9312 [2022-03-20 19:02:19,346 INFO L913 BasicCegarLoop]: 19 mSDtfsCounter, 20 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 2509 mSolverCounterSat, 104 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 76 SdHoareTripleChecker+Invalid, 2613 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 104 IncrementalHoareTripleChecker+Valid, 2509 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-03-20 19:02:19,346 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 76 Invalid, 2613 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [104 Valid, 2509 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-03-20 19:02:19,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2022-03-20 19:02:19,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 72. [2022-03-20 19:02:19,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 63 states have (on average 1.0634920634920635) internal successors, (67), 64 states have internal predecessors, (67), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-20 19:02:19,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 75 transitions. [2022-03-20 19:02:19,386 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 75 transitions. Word has length 65 [2022-03-20 19:02:19,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 19:02:19,386 INFO L478 AbstractCegarLoop]: Abstraction has 72 states and 75 transitions. [2022-03-20 19:02:19,386 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 1.16) internal successors, (58), 49 states have internal predecessors, (58), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 19:02:19,386 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 75 transitions. [2022-03-20 19:02:19,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-03-20 19:02:19,386 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 19:02:19,387 INFO L499 BasicCegarLoop]: trace histogram [46, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 19:02:19,387 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2022-03-20 19:02:19,387 INFO L403 AbstractCegarLoop]: === Iteration 51 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 19:02:19,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 19:02:19,387 INFO L85 PathProgramCache]: Analyzing trace with hash -703280094, now seen corresponding path program 46 times [2022-03-20 19:02:19,387 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 19:02:19,387 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1024546735] [2022-03-20 19:02:19,585 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 19:02:19,586 INFO L85 PathProgramCache]: Analyzing trace with hash -350510728, now seen corresponding path program 1 times [2022-03-20 19:02:19,586 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:02:19,586 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1916727848] [2022-03-20 19:02:19,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:02:19,586 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:02:19,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:02:19,630 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 19:02:19,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:02:19,632 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 19:02:19,633 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 19:02:19,633 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1916727848] [2022-03-20 19:02:19,633 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1916727848] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:02:19,633 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:02:19,633 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 19:02:20,673 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 19:02:20,673 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1024546735] [2022-03-20 19:02:20,673 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1024546735] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:02:20,673 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:02:20,674 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [51] imperfect sequences [] total 51 [2022-03-20 19:02:20,674 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1362948842] [2022-03-20 19:02:20,674 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 19:02:20,674 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2022-03-20 19:02:20,674 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 19:02:20,674 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2022-03-20 19:02:20,675 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=2404, Unknown=0, NotChecked=0, Total=2550 [2022-03-20 19:02:20,675 INFO L87 Difference]: Start difference. First operand 72 states and 75 transitions. Second operand has 51 states, 51 states have (on average 1.1568627450980393) internal successors, (59), 50 states have internal predecessors, (59), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 19:02:22,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 19:02:22,536 INFO L93 Difference]: Finished difference Result 143 states and 152 transitions. [2022-03-20 19:02:22,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-03-20 19:02:22,537 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 1.1568627450980393) internal successors, (59), 50 states have internal predecessors, (59), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 66 [2022-03-20 19:02:22,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 19:02:22,539 INFO L225 Difference]: With dead ends: 143 [2022-03-20 19:02:22,539 INFO L226 Difference]: Without dead ends: 78 [2022-03-20 19:02:22,540 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1128 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=432, Invalid=9270, Unknown=0, NotChecked=0, Total=9702 [2022-03-20 19:02:22,541 INFO L913 BasicCegarLoop]: 19 mSDtfsCounter, 20 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 2649 mSolverCounterSat, 106 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 91 SdHoareTripleChecker+Invalid, 2755 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 106 IncrementalHoareTripleChecker+Valid, 2649 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-03-20 19:02:22,541 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 91 Invalid, 2755 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [106 Valid, 2649 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-03-20 19:02:22,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2022-03-20 19:02:22,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 73. [2022-03-20 19:02:22,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 64 states have (on average 1.0625) internal successors, (68), 65 states have internal predecessors, (68), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-20 19:02:22,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 76 transitions. [2022-03-20 19:02:22,584 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 76 transitions. Word has length 66 [2022-03-20 19:02:22,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 19:02:22,584 INFO L478 AbstractCegarLoop]: Abstraction has 73 states and 76 transitions. [2022-03-20 19:02:22,584 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 1.1568627450980393) internal successors, (59), 50 states have internal predecessors, (59), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 19:02:22,584 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 76 transitions. [2022-03-20 19:02:22,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-03-20 19:02:22,584 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 19:02:22,584 INFO L499 BasicCegarLoop]: trace histogram [47, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 19:02:22,585 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2022-03-20 19:02:22,585 INFO L403 AbstractCegarLoop]: === Iteration 52 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 19:02:22,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 19:02:22,585 INFO L85 PathProgramCache]: Analyzing trace with hash 625436162, now seen corresponding path program 47 times [2022-03-20 19:02:22,585 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 19:02:22,585 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [625206220] [2022-03-20 19:02:22,723 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 19:02:22,723 INFO L85 PathProgramCache]: Analyzing trace with hash -291405384, now seen corresponding path program 1 times [2022-03-20 19:02:22,723 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:02:22,723 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [563496159] [2022-03-20 19:02:22,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:02:22,724 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:02:22,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:02:22,747 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 19:02:22,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:02:22,750 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 19:02:22,750 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 19:02:22,750 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [563496159] [2022-03-20 19:02:22,750 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [563496159] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:02:22,750 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:02:22,750 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 19:02:23,825 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 19:02:23,825 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [625206220] [2022-03-20 19:02:23,825 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [625206220] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:02:23,825 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:02:23,825 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [52] imperfect sequences [] total 52 [2022-03-20 19:02:23,826 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1405023291] [2022-03-20 19:02:23,826 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 19:02:23,826 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2022-03-20 19:02:23,826 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 19:02:23,826 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2022-03-20 19:02:23,827 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=2503, Unknown=0, NotChecked=0, Total=2652 [2022-03-20 19:02:23,827 INFO L87 Difference]: Start difference. First operand 73 states and 76 transitions. Second operand has 52 states, 52 states have (on average 1.1538461538461537) internal successors, (60), 51 states have internal predecessors, (60), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 19:02:25,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 19:02:25,839 INFO L93 Difference]: Finished difference Result 145 states and 154 transitions. [2022-03-20 19:02:25,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2022-03-20 19:02:25,840 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 1.1538461538461537) internal successors, (60), 51 states have internal predecessors, (60), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 67 [2022-03-20 19:02:25,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 19:02:25,840 INFO L225 Difference]: With dead ends: 145 [2022-03-20 19:02:25,840 INFO L226 Difference]: Without dead ends: 79 [2022-03-20 19:02:25,841 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1176 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=441, Invalid=9659, Unknown=0, NotChecked=0, Total=10100 [2022-03-20 19:02:25,842 INFO L913 BasicCegarLoop]: 19 mSDtfsCounter, 20 mSDsluCounter, 142 mSDsCounter, 0 mSdLazyCounter, 2944 mSolverCounterSat, 109 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 161 SdHoareTripleChecker+Invalid, 3053 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 109 IncrementalHoareTripleChecker+Valid, 2944 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-03-20 19:02:25,842 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 161 Invalid, 3053 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [109 Valid, 2944 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-03-20 19:02:25,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2022-03-20 19:02:25,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 74. [2022-03-20 19:02:25,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 65 states have (on average 1.0615384615384615) internal successors, (69), 66 states have internal predecessors, (69), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-20 19:02:25,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 77 transitions. [2022-03-20 19:02:25,880 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 77 transitions. Word has length 67 [2022-03-20 19:02:25,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 19:02:25,880 INFO L478 AbstractCegarLoop]: Abstraction has 74 states and 77 transitions. [2022-03-20 19:02:25,880 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 52 states have (on average 1.1538461538461537) internal successors, (60), 51 states have internal predecessors, (60), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 19:02:25,880 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 77 transitions. [2022-03-20 19:02:25,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-03-20 19:02:25,880 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 19:02:25,880 INFO L499 BasicCegarLoop]: trace histogram [48, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 19:02:25,880 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2022-03-20 19:02:25,880 INFO L403 AbstractCegarLoop]: === Iteration 53 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 19:02:25,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 19:02:25,881 INFO L85 PathProgramCache]: Analyzing trace with hash -1134032862, now seen corresponding path program 48 times [2022-03-20 19:02:25,881 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 19:02:25,881 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1583802456] [2022-03-20 19:02:26,051 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 19:02:26,052 INFO L85 PathProgramCache]: Analyzing trace with hash -232300040, now seen corresponding path program 1 times [2022-03-20 19:02:26,052 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:02:26,052 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [765723983] [2022-03-20 19:02:26,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:02:26,052 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:02:26,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:02:26,080 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 19:02:26,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:02:26,083 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 19:02:26,083 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 19:02:26,083 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [765723983] [2022-03-20 19:02:26,083 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [765723983] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:02:26,083 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:02:26,083 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 19:02:27,233 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 19:02:27,234 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1583802456] [2022-03-20 19:02:27,234 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1583802456] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:02:27,234 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:02:27,234 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [53] imperfect sequences [] total 53 [2022-03-20 19:02:27,234 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2008340911] [2022-03-20 19:02:27,234 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 19:02:27,234 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2022-03-20 19:02:27,234 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 19:02:27,234 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2022-03-20 19:02:27,234 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=152, Invalid=2604, Unknown=0, NotChecked=0, Total=2756 [2022-03-20 19:02:27,235 INFO L87 Difference]: Start difference. First operand 74 states and 77 transitions. Second operand has 53 states, 53 states have (on average 1.150943396226415) internal successors, (61), 52 states have internal predecessors, (61), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 19:02:29,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 19:02:29,424 INFO L93 Difference]: Finished difference Result 147 states and 156 transitions. [2022-03-20 19:02:29,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-03-20 19:02:29,424 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 1.150943396226415) internal successors, (61), 52 states have internal predecessors, (61), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 68 [2022-03-20 19:02:29,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 19:02:29,425 INFO L225 Difference]: With dead ends: 147 [2022-03-20 19:02:29,425 INFO L226 Difference]: Without dead ends: 80 [2022-03-20 19:02:29,426 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1225 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=450, Invalid=10056, Unknown=0, NotChecked=0, Total=10506 [2022-03-20 19:02:29,426 INFO L913 BasicCegarLoop]: 19 mSDtfsCounter, 20 mSDsluCounter, 242 mSDsCounter, 0 mSdLazyCounter, 3326 mSolverCounterSat, 111 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 261 SdHoareTripleChecker+Invalid, 3437 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 111 IncrementalHoareTripleChecker+Valid, 3326 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-03-20 19:02:29,426 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 261 Invalid, 3437 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [111 Valid, 3326 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-03-20 19:02:29,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2022-03-20 19:02:29,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 75. [2022-03-20 19:02:29,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 66 states have (on average 1.0606060606060606) internal successors, (70), 67 states have internal predecessors, (70), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-20 19:02:29,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 78 transitions. [2022-03-20 19:02:29,460 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 78 transitions. Word has length 68 [2022-03-20 19:02:29,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 19:02:29,460 INFO L478 AbstractCegarLoop]: Abstraction has 75 states and 78 transitions. [2022-03-20 19:02:29,460 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 1.150943396226415) internal successors, (61), 52 states have internal predecessors, (61), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 19:02:29,460 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 78 transitions. [2022-03-20 19:02:29,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-03-20 19:02:29,460 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 19:02:29,460 INFO L499 BasicCegarLoop]: trace histogram [49, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 19:02:29,461 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2022-03-20 19:02:29,461 INFO L403 AbstractCegarLoop]: === Iteration 54 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 19:02:29,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 19:02:29,461 INFO L85 PathProgramCache]: Analyzing trace with hash 157002242, now seen corresponding path program 49 times [2022-03-20 19:02:29,461 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 19:02:29,461 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [373795471] [2022-03-20 19:02:29,602 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 19:02:29,602 INFO L85 PathProgramCache]: Analyzing trace with hash -173194696, now seen corresponding path program 1 times [2022-03-20 19:02:29,602 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:02:29,602 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1521793115] [2022-03-20 19:02:29,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:02:29,602 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:02:29,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:02:29,630 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 19:02:29,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:02:29,632 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 19:02:29,632 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 19:02:29,632 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1521793115] [2022-03-20 19:02:29,632 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1521793115] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:02:29,632 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:02:29,632 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 19:02:30,754 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 19:02:30,755 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [373795471] [2022-03-20 19:02:30,755 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [373795471] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:02:30,755 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:02:30,755 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [54] imperfect sequences [] total 54 [2022-03-20 19:02:30,755 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [553679783] [2022-03-20 19:02:30,757 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 19:02:30,758 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2022-03-20 19:02:30,758 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 19:02:30,758 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2022-03-20 19:02:30,759 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=2707, Unknown=0, NotChecked=0, Total=2862 [2022-03-20 19:02:30,759 INFO L87 Difference]: Start difference. First operand 75 states and 78 transitions. Second operand has 54 states, 54 states have (on average 1.1481481481481481) internal successors, (62), 53 states have internal predecessors, (62), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 19:02:32,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 19:02:32,802 INFO L93 Difference]: Finished difference Result 149 states and 158 transitions. [2022-03-20 19:02:32,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2022-03-20 19:02:32,803 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 1.1481481481481481) internal successors, (62), 53 states have internal predecessors, (62), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 69 [2022-03-20 19:02:32,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 19:02:32,803 INFO L225 Difference]: With dead ends: 149 [2022-03-20 19:02:32,803 INFO L226 Difference]: Without dead ends: 81 [2022-03-20 19:02:32,804 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1275 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=459, Invalid=10461, Unknown=0, NotChecked=0, Total=10920 [2022-03-20 19:02:32,805 INFO L913 BasicCegarLoop]: 19 mSDtfsCounter, 20 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 2870 mSolverCounterSat, 113 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 2983 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 113 IncrementalHoareTripleChecker+Valid, 2870 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-03-20 19:02:32,805 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 61 Invalid, 2983 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [113 Valid, 2870 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-03-20 19:02:32,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2022-03-20 19:02:32,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 76. [2022-03-20 19:02:32,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 67 states have (on average 1.0597014925373134) internal successors, (71), 68 states have internal predecessors, (71), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-20 19:02:32,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 79 transitions. [2022-03-20 19:02:32,842 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 79 transitions. Word has length 69 [2022-03-20 19:02:32,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 19:02:32,843 INFO L478 AbstractCegarLoop]: Abstraction has 76 states and 79 transitions. [2022-03-20 19:02:32,843 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 54 states have (on average 1.1481481481481481) internal successors, (62), 53 states have internal predecessors, (62), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 19:02:32,843 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 79 transitions. [2022-03-20 19:02:32,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-03-20 19:02:32,843 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 19:02:32,843 INFO L499 BasicCegarLoop]: trace histogram [50, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 19:02:32,843 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2022-03-20 19:02:32,843 INFO L403 AbstractCegarLoop]: === Iteration 55 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 19:02:32,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 19:02:32,843 INFO L85 PathProgramCache]: Analyzing trace with hash 1524384802, now seen corresponding path program 50 times [2022-03-20 19:02:32,843 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 19:02:32,844 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2066023714] [2022-03-20 19:02:33,027 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 19:02:33,028 INFO L85 PathProgramCache]: Analyzing trace with hash -114089352, now seen corresponding path program 1 times [2022-03-20 19:02:33,028 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:02:33,028 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1949128604] [2022-03-20 19:02:33,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:02:33,028 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:02:33,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:02:33,071 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 19:02:33,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:02:33,074 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 19:02:33,074 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 19:02:33,074 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1949128604] [2022-03-20 19:02:33,074 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1949128604] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:02:33,074 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:02:33,074 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 19:02:34,494 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 19:02:34,494 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2066023714] [2022-03-20 19:02:34,494 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2066023714] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:02:34,494 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:02:34,494 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [55] imperfect sequences [] total 55 [2022-03-20 19:02:34,494 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1497861258] [2022-03-20 19:02:34,495 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 19:02:34,495 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2022-03-20 19:02:34,495 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 19:02:34,495 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2022-03-20 19:02:34,495 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=2812, Unknown=0, NotChecked=0, Total=2970 [2022-03-20 19:02:34,496 INFO L87 Difference]: Start difference. First operand 76 states and 79 transitions. Second operand has 55 states, 55 states have (on average 1.1454545454545455) internal successors, (63), 54 states have internal predecessors, (63), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 19:02:36,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 19:02:36,768 INFO L93 Difference]: Finished difference Result 151 states and 160 transitions. [2022-03-20 19:02:36,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-03-20 19:02:36,768 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 55 states have (on average 1.1454545454545455) internal successors, (63), 54 states have internal predecessors, (63), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 70 [2022-03-20 19:02:36,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 19:02:36,769 INFO L225 Difference]: With dead ends: 151 [2022-03-20 19:02:36,769 INFO L226 Difference]: Without dead ends: 82 [2022-03-20 19:02:36,769 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1326 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=468, Invalid=10874, Unknown=0, NotChecked=0, Total=11342 [2022-03-20 19:02:36,769 INFO L913 BasicCegarLoop]: 19 mSDtfsCounter, 20 mSDsluCounter, 187 mSDsCounter, 0 mSdLazyCounter, 3383 mSolverCounterSat, 114 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 206 SdHoareTripleChecker+Invalid, 3497 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 114 IncrementalHoareTripleChecker+Valid, 3383 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-03-20 19:02:36,770 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 206 Invalid, 3497 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [114 Valid, 3383 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-03-20 19:02:36,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2022-03-20 19:02:36,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 77. [2022-03-20 19:02:36,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 68 states have (on average 1.0588235294117647) internal successors, (72), 69 states have internal predecessors, (72), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-20 19:02:36,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 80 transitions. [2022-03-20 19:02:36,823 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 80 transitions. Word has length 70 [2022-03-20 19:02:36,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 19:02:36,824 INFO L478 AbstractCegarLoop]: Abstraction has 77 states and 80 transitions. [2022-03-20 19:02:36,824 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 55 states have (on average 1.1454545454545455) internal successors, (63), 54 states have internal predecessors, (63), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 19:02:36,824 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 80 transitions. [2022-03-20 19:02:36,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-03-20 19:02:36,824 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 19:02:36,824 INFO L499 BasicCegarLoop]: trace histogram [51, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 19:02:36,824 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2022-03-20 19:02:36,825 INFO L403 AbstractCegarLoop]: === Iteration 56 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 19:02:36,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 19:02:36,825 INFO L85 PathProgramCache]: Analyzing trace with hash 963571202, now seen corresponding path program 51 times [2022-03-20 19:02:36,825 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 19:02:36,825 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1368740013] [2022-03-20 19:02:37,020 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 19:02:37,021 INFO L85 PathProgramCache]: Analyzing trace with hash -54984008, now seen corresponding path program 1 times [2022-03-20 19:02:37,021 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:02:37,021 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1162131512] [2022-03-20 19:02:37,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:02:37,021 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:02:37,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:02:37,054 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 19:02:37,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:02:37,057 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 19:02:37,057 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 19:02:37,057 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1162131512] [2022-03-20 19:02:37,058 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1162131512] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:02:37,058 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:02:37,058 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 19:02:38,315 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 19:02:38,316 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1368740013] [2022-03-20 19:02:38,316 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1368740013] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:02:38,316 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:02:38,316 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [56] imperfect sequences [] total 56 [2022-03-20 19:02:38,316 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2145702811] [2022-03-20 19:02:38,316 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 19:02:38,316 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2022-03-20 19:02:38,316 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 19:02:38,316 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2022-03-20 19:02:38,317 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=161, Invalid=2919, Unknown=0, NotChecked=0, Total=3080 [2022-03-20 19:02:38,317 INFO L87 Difference]: Start difference. First operand 77 states and 80 transitions. Second operand has 56 states, 56 states have (on average 1.1428571428571428) internal successors, (64), 55 states have internal predecessors, (64), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 19:02:40,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 19:02:40,529 INFO L93 Difference]: Finished difference Result 153 states and 162 transitions. [2022-03-20 19:02:40,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2022-03-20 19:02:40,530 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 56 states have (on average 1.1428571428571428) internal successors, (64), 55 states have internal predecessors, (64), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 71 [2022-03-20 19:02:40,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 19:02:40,530 INFO L225 Difference]: With dead ends: 153 [2022-03-20 19:02:40,530 INFO L226 Difference]: Without dead ends: 83 [2022-03-20 19:02:40,531 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1378 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=477, Invalid=11295, Unknown=0, NotChecked=0, Total=11772 [2022-03-20 19:02:40,532 INFO L913 BasicCegarLoop]: 19 mSDtfsCounter, 20 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 3113 mSolverCounterSat, 116 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 71 SdHoareTripleChecker+Invalid, 3229 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 116 IncrementalHoareTripleChecker+Valid, 3113 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-03-20 19:02:40,532 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 71 Invalid, 3229 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [116 Valid, 3113 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-03-20 19:02:40,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2022-03-20 19:02:40,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 78. [2022-03-20 19:02:40,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 69 states have (on average 1.0579710144927537) internal successors, (73), 70 states have internal predecessors, (73), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-20 19:02:40,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 81 transitions. [2022-03-20 19:02:40,570 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 81 transitions. Word has length 71 [2022-03-20 19:02:40,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 19:02:40,570 INFO L478 AbstractCegarLoop]: Abstraction has 78 states and 81 transitions. [2022-03-20 19:02:40,570 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 56 states have (on average 1.1428571428571428) internal successors, (64), 55 states have internal predecessors, (64), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 19:02:40,570 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 81 transitions. [2022-03-20 19:02:40,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-03-20 19:02:40,570 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 19:02:40,570 INFO L499 BasicCegarLoop]: trace histogram [52, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 19:02:40,570 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2022-03-20 19:02:40,571 INFO L403 AbstractCegarLoop]: === Iteration 57 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 19:02:40,571 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 19:02:40,571 INFO L85 PathProgramCache]: Analyzing trace with hash 758218786, now seen corresponding path program 52 times [2022-03-20 19:02:40,571 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 19:02:40,571 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [382540938] [2022-03-20 19:02:40,735 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 19:02:40,736 INFO L85 PathProgramCache]: Analyzing trace with hash 4121336, now seen corresponding path program 1 times [2022-03-20 19:02:40,736 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:02:40,736 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2096144462] [2022-03-20 19:02:40,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:02:40,736 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:02:40,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:02:40,766 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 19:02:40,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:02:40,768 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 19:02:40,769 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 19:02:40,769 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2096144462] [2022-03-20 19:02:40,769 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2096144462] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:02:40,769 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:02:40,769 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 19:02:42,095 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 19:02:42,096 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [382540938] [2022-03-20 19:02:42,096 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [382540938] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:02:42,096 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:02:42,096 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [57] imperfect sequences [] total 57 [2022-03-20 19:02:42,096 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1386785585] [2022-03-20 19:02:42,096 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 19:02:42,096 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2022-03-20 19:02:42,096 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 19:02:42,096 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2022-03-20 19:02:42,097 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=164, Invalid=3028, Unknown=0, NotChecked=0, Total=3192 [2022-03-20 19:02:42,097 INFO L87 Difference]: Start difference. First operand 78 states and 81 transitions. Second operand has 57 states, 57 states have (on average 1.1403508771929824) internal successors, (65), 56 states have internal predecessors, (65), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 19:02:44,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 19:02:44,428 INFO L93 Difference]: Finished difference Result 155 states and 164 transitions. [2022-03-20 19:02:44,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2022-03-20 19:02:44,428 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 57 states have (on average 1.1403508771929824) internal successors, (65), 56 states have internal predecessors, (65), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 72 [2022-03-20 19:02:44,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 19:02:44,429 INFO L225 Difference]: With dead ends: 155 [2022-03-20 19:02:44,429 INFO L226 Difference]: Without dead ends: 84 [2022-03-20 19:02:44,430 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1431 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=486, Invalid=11724, Unknown=0, NotChecked=0, Total=12210 [2022-03-20 19:02:44,430 INFO L913 BasicCegarLoop]: 19 mSDtfsCounter, 20 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 3390 mSolverCounterSat, 119 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 131 SdHoareTripleChecker+Invalid, 3509 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 119 IncrementalHoareTripleChecker+Valid, 3390 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-03-20 19:02:44,430 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 131 Invalid, 3509 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [119 Valid, 3390 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-03-20 19:02:44,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2022-03-20 19:02:44,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 79. [2022-03-20 19:02:44,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 70 states have (on average 1.0571428571428572) internal successors, (74), 71 states have internal predecessors, (74), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-20 19:02:44,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 82 transitions. [2022-03-20 19:02:44,478 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 82 transitions. Word has length 72 [2022-03-20 19:02:44,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 19:02:44,478 INFO L478 AbstractCegarLoop]: Abstraction has 79 states and 82 transitions. [2022-03-20 19:02:44,478 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 57 states have (on average 1.1403508771929824) internal successors, (65), 56 states have internal predecessors, (65), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 19:02:44,478 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 82 transitions. [2022-03-20 19:02:44,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-03-20 19:02:44,479 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 19:02:44,479 INFO L499 BasicCegarLoop]: trace histogram [53, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 19:02:44,479 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2022-03-20 19:02:44,479 INFO L403 AbstractCegarLoop]: === Iteration 58 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 19:02:44,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 19:02:44,479 INFO L85 PathProgramCache]: Analyzing trace with hash -1312738814, now seen corresponding path program 53 times [2022-03-20 19:02:44,479 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 19:02:44,479 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [678432731] [2022-03-20 19:02:44,617 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 19:02:44,617 INFO L85 PathProgramCache]: Analyzing trace with hash 63226680, now seen corresponding path program 1 times [2022-03-20 19:02:44,617 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:02:44,617 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2040690832] [2022-03-20 19:02:44,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:02:44,618 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:02:44,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:02:44,642 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 19:02:44,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:02:44,645 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 19:02:44,645 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 19:02:44,645 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2040690832] [2022-03-20 19:02:44,645 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2040690832] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:02:44,645 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:02:44,645 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 19:02:46,008 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 19:02:46,008 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [678432731] [2022-03-20 19:02:46,008 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [678432731] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:02:46,008 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:02:46,009 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [58] imperfect sequences [] total 58 [2022-03-20 19:02:46,009 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [812148070] [2022-03-20 19:02:46,009 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 19:02:46,009 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2022-03-20 19:02:46,009 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 19:02:46,009 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2022-03-20 19:02:46,009 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=167, Invalid=3139, Unknown=0, NotChecked=0, Total=3306 [2022-03-20 19:02:46,010 INFO L87 Difference]: Start difference. First operand 79 states and 82 transitions. Second operand has 58 states, 58 states have (on average 1.1379310344827587) internal successors, (66), 57 states have internal predecessors, (66), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 19:02:48,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 19:02:48,541 INFO L93 Difference]: Finished difference Result 157 states and 166 transitions. [2022-03-20 19:02:48,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2022-03-20 19:02:48,541 INFO L78 Accepts]: Start accepts. Automaton has has 58 states, 58 states have (on average 1.1379310344827587) internal successors, (66), 57 states have internal predecessors, (66), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 73 [2022-03-20 19:02:48,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 19:02:48,542 INFO L225 Difference]: With dead ends: 157 [2022-03-20 19:02:48,542 INFO L226 Difference]: Without dead ends: 85 [2022-03-20 19:02:48,543 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 111 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1485 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=495, Invalid=12161, Unknown=0, NotChecked=0, Total=12656 [2022-03-20 19:02:48,543 INFO L913 BasicCegarLoop]: 19 mSDtfsCounter, 20 mSDsluCounter, 262 mSDsCounter, 0 mSdLazyCounter, 3923 mSolverCounterSat, 120 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 281 SdHoareTripleChecker+Invalid, 4043 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 120 IncrementalHoareTripleChecker+Valid, 3923 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-03-20 19:02:48,544 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 281 Invalid, 4043 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [120 Valid, 3923 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-03-20 19:02:48,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2022-03-20 19:02:48,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 80. [2022-03-20 19:02:48,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 71 states have (on average 1.056338028169014) internal successors, (75), 72 states have internal predecessors, (75), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-20 19:02:48,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 83 transitions. [2022-03-20 19:02:48,604 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 83 transitions. Word has length 73 [2022-03-20 19:02:48,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 19:02:48,604 INFO L478 AbstractCegarLoop]: Abstraction has 80 states and 83 transitions. [2022-03-20 19:02:48,604 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 58 states, 58 states have (on average 1.1379310344827587) internal successors, (66), 57 states have internal predecessors, (66), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 19:02:48,604 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 83 transitions. [2022-03-20 19:02:48,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-03-20 19:02:48,604 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 19:02:48,604 INFO L499 BasicCegarLoop]: trace histogram [54, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 19:02:48,604 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2022-03-20 19:02:48,605 INFO L403 AbstractCegarLoop]: === Iteration 59 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 19:02:48,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 19:02:48,605 INFO L85 PathProgramCache]: Analyzing trace with hash -1087914974, now seen corresponding path program 54 times [2022-03-20 19:02:48,605 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 19:02:48,605 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1875038729] [2022-03-20 19:02:48,749 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 19:02:48,749 INFO L85 PathProgramCache]: Analyzing trace with hash 122332024, now seen corresponding path program 1 times [2022-03-20 19:02:48,749 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:02:48,749 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [302734529] [2022-03-20 19:02:48,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:02:48,750 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:02:48,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:02:48,781 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 19:02:48,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:02:48,784 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 19:02:48,784 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 19:02:48,784 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [302734529] [2022-03-20 19:02:48,784 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [302734529] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:02:48,784 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:02:48,784 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 19:02:50,067 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 19:02:50,067 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1875038729] [2022-03-20 19:02:50,067 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1875038729] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:02:50,067 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:02:50,067 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [59] imperfect sequences [] total 59 [2022-03-20 19:02:50,067 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1937547640] [2022-03-20 19:02:50,067 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 19:02:50,067 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2022-03-20 19:02:50,067 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 19:02:50,067 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2022-03-20 19:02:50,068 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=170, Invalid=3252, Unknown=0, NotChecked=0, Total=3422 [2022-03-20 19:02:50,068 INFO L87 Difference]: Start difference. First operand 80 states and 83 transitions. Second operand has 59 states, 59 states have (on average 1.1355932203389831) internal successors, (67), 58 states have internal predecessors, (67), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 19:02:52,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 19:02:52,558 INFO L93 Difference]: Finished difference Result 159 states and 168 transitions. [2022-03-20 19:02:52,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2022-03-20 19:02:52,559 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 59 states have (on average 1.1355932203389831) internal successors, (67), 58 states have internal predecessors, (67), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 74 [2022-03-20 19:02:52,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 19:02:52,559 INFO L225 Difference]: With dead ends: 159 [2022-03-20 19:02:52,559 INFO L226 Difference]: Without dead ends: 86 [2022-03-20 19:02:52,561 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 113 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1540 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=504, Invalid=12606, Unknown=0, NotChecked=0, Total=13110 [2022-03-20 19:02:52,561 INFO L913 BasicCegarLoop]: 19 mSDtfsCounter, 20 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 3532 mSolverCounterSat, 123 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 101 SdHoareTripleChecker+Invalid, 3655 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 123 IncrementalHoareTripleChecker+Valid, 3532 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-03-20 19:02:52,561 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 101 Invalid, 3655 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [123 Valid, 3532 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-03-20 19:02:52,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2022-03-20 19:02:52,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 81. [2022-03-20 19:02:52,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 72 states have (on average 1.0555555555555556) internal successors, (76), 73 states have internal predecessors, (76), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-20 19:02:52,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 84 transitions. [2022-03-20 19:02:52,609 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 84 transitions. Word has length 74 [2022-03-20 19:02:52,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 19:02:52,609 INFO L478 AbstractCegarLoop]: Abstraction has 81 states and 84 transitions. [2022-03-20 19:02:52,609 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 59 states have (on average 1.1355932203389831) internal successors, (67), 58 states have internal predecessors, (67), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 19:02:52,609 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 84 transitions. [2022-03-20 19:02:52,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2022-03-20 19:02:52,610 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 19:02:52,610 INFO L499 BasicCegarLoop]: trace histogram [55, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 19:02:52,610 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2022-03-20 19:02:52,610 INFO L403 AbstractCegarLoop]: === Iteration 60 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 19:02:52,610 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 19:02:52,610 INFO L85 PathProgramCache]: Analyzing trace with hash 1586656770, now seen corresponding path program 55 times [2022-03-20 19:02:52,610 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 19:02:52,610 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [522620412] [2022-03-20 19:02:52,796 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 19:02:52,796 INFO L85 PathProgramCache]: Analyzing trace with hash 181437368, now seen corresponding path program 1 times [2022-03-20 19:02:52,796 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:02:52,796 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1685515643] [2022-03-20 19:02:52,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:02:52,797 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:02:52,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:02:52,832 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 19:02:52,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:02:52,834 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 19:02:52,835 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 19:02:52,835 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1685515643] [2022-03-20 19:02:52,835 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1685515643] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:02:52,835 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:02:52,835 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 19:02:54,243 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 19:02:54,243 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [522620412] [2022-03-20 19:02:54,243 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [522620412] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:02:54,243 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:02:54,243 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [60] imperfect sequences [] total 60 [2022-03-20 19:02:54,243 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1374274517] [2022-03-20 19:02:54,243 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 19:02:54,243 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 60 states [2022-03-20 19:02:54,243 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 19:02:54,244 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2022-03-20 19:02:54,244 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=3367, Unknown=0, NotChecked=0, Total=3540 [2022-03-20 19:02:54,244 INFO L87 Difference]: Start difference. First operand 81 states and 84 transitions. Second operand has 60 states, 60 states have (on average 1.1333333333333333) internal successors, (68), 59 states have internal predecessors, (68), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 19:02:56,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 19:02:56,848 INFO L93 Difference]: Finished difference Result 161 states and 170 transitions. [2022-03-20 19:02:56,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2022-03-20 19:02:56,848 INFO L78 Accepts]: Start accepts. Automaton has has 60 states, 60 states have (on average 1.1333333333333333) internal successors, (68), 59 states have internal predecessors, (68), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 75 [2022-03-20 19:02:56,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 19:02:56,849 INFO L225 Difference]: With dead ends: 161 [2022-03-20 19:02:56,849 INFO L226 Difference]: Without dead ends: 87 [2022-03-20 19:02:56,850 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 115 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1596 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=513, Invalid=13059, Unknown=0, NotChecked=0, Total=13572 [2022-03-20 19:02:56,850 INFO L913 BasicCegarLoop]: 19 mSDtfsCounter, 20 mSDsluCounter, 117 mSDsCounter, 0 mSdLazyCounter, 3747 mSolverCounterSat, 124 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 136 SdHoareTripleChecker+Invalid, 3871 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 124 IncrementalHoareTripleChecker+Valid, 3747 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-03-20 19:02:56,850 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 136 Invalid, 3871 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [124 Valid, 3747 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-03-20 19:02:56,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2022-03-20 19:02:56,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 82. [2022-03-20 19:02:56,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 73 states have (on average 1.0547945205479452) internal successors, (77), 74 states have internal predecessors, (77), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-20 19:02:56,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 85 transitions. [2022-03-20 19:02:56,892 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 85 transitions. Word has length 75 [2022-03-20 19:02:56,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 19:02:56,892 INFO L478 AbstractCegarLoop]: Abstraction has 82 states and 85 transitions. [2022-03-20 19:02:56,892 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 60 states, 60 states have (on average 1.1333333333333333) internal successors, (68), 59 states have internal predecessors, (68), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 19:02:56,892 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 85 transitions. [2022-03-20 19:02:56,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2022-03-20 19:02:56,892 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 19:02:56,892 INFO L499 BasicCegarLoop]: trace histogram [56, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 19:02:56,892 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2022-03-20 19:02:56,893 INFO L403 AbstractCegarLoop]: === Iteration 61 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 19:02:56,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 19:02:56,893 INFO L85 PathProgramCache]: Analyzing trace with hash -1400965086, now seen corresponding path program 56 times [2022-03-20 19:02:56,893 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 19:02:56,893 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1986532518] [2022-03-20 19:02:57,077 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 19:02:57,077 INFO L85 PathProgramCache]: Analyzing trace with hash 240542712, now seen corresponding path program 1 times [2022-03-20 19:02:57,077 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:02:57,078 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1200941793] [2022-03-20 19:02:57,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:02:57,078 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:02:57,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:02:57,122 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 19:02:57,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:02:57,125 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 19:02:57,125 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 19:02:57,125 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1200941793] [2022-03-20 19:02:57,125 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1200941793] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:02:57,125 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:02:57,125 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 19:02:58,618 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 19:02:58,618 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1986532518] [2022-03-20 19:02:58,618 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1986532518] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:02:58,618 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:02:58,618 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [61] imperfect sequences [] total 61 [2022-03-20 19:02:58,618 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [688163324] [2022-03-20 19:02:58,618 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 19:02:58,619 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 61 states [2022-03-20 19:02:58,619 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 19:02:58,619 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2022-03-20 19:02:58,619 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=176, Invalid=3484, Unknown=0, NotChecked=0, Total=3660 [2022-03-20 19:02:58,620 INFO L87 Difference]: Start difference. First operand 82 states and 85 transitions. Second operand has 61 states, 61 states have (on average 1.1311475409836065) internal successors, (69), 60 states have internal predecessors, (69), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 19:03:01,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 19:03:01,237 INFO L93 Difference]: Finished difference Result 163 states and 172 transitions. [2022-03-20 19:03:01,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2022-03-20 19:03:01,237 INFO L78 Accepts]: Start accepts. Automaton has has 61 states, 61 states have (on average 1.1311475409836065) internal successors, (69), 60 states have internal predecessors, (69), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 76 [2022-03-20 19:03:01,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 19:03:01,238 INFO L225 Difference]: With dead ends: 163 [2022-03-20 19:03:01,238 INFO L226 Difference]: Without dead ends: 88 [2022-03-20 19:03:01,239 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 117 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1653 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=522, Invalid=13520, Unknown=0, NotChecked=0, Total=14042 [2022-03-20 19:03:01,239 INFO L913 BasicCegarLoop]: 19 mSDtfsCounter, 20 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 3710 mSolverCounterSat, 127 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 3837 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 127 IncrementalHoareTripleChecker+Valid, 3710 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-03-20 19:03:01,239 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 81 Invalid, 3837 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [127 Valid, 3710 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-03-20 19:03:01,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2022-03-20 19:03:01,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 83. [2022-03-20 19:03:01,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 74 states have (on average 1.054054054054054) internal successors, (78), 75 states have internal predecessors, (78), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-20 19:03:01,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 86 transitions. [2022-03-20 19:03:01,293 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 86 transitions. Word has length 76 [2022-03-20 19:03:01,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 19:03:01,293 INFO L478 AbstractCegarLoop]: Abstraction has 83 states and 86 transitions. [2022-03-20 19:03:01,294 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 61 states, 61 states have (on average 1.1311475409836065) internal successors, (69), 60 states have internal predecessors, (69), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 19:03:01,294 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 86 transitions. [2022-03-20 19:03:01,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2022-03-20 19:03:01,294 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 19:03:01,294 INFO L499 BasicCegarLoop]: trace histogram [57, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 19:03:01,294 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2022-03-20 19:03:01,294 INFO L403 AbstractCegarLoop]: === Iteration 62 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 19:03:01,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 19:03:01,294 INFO L85 PathProgramCache]: Analyzing trace with hash 472037890, now seen corresponding path program 57 times [2022-03-20 19:03:01,294 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 19:03:01,295 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [458463619] [2022-03-20 19:03:01,499 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 19:03:01,500 INFO L85 PathProgramCache]: Analyzing trace with hash 299648056, now seen corresponding path program 1 times [2022-03-20 19:03:01,500 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:03:01,500 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1240201104] [2022-03-20 19:03:01,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:03:01,500 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:03:01,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:03:01,536 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 19:03:01,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:03:01,539 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 19:03:01,539 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 19:03:01,539 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1240201104] [2022-03-20 19:03:01,539 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1240201104] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:03:01,539 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:03:01,539 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 19:03:03,055 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 19:03:03,055 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [458463619] [2022-03-20 19:03:03,055 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [458463619] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:03:03,055 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:03:03,055 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [62] imperfect sequences [] total 62 [2022-03-20 19:03:03,055 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [210937195] [2022-03-20 19:03:03,055 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 19:03:03,055 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 62 states [2022-03-20 19:03:03,055 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 19:03:03,056 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2022-03-20 19:03:03,056 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=179, Invalid=3603, Unknown=0, NotChecked=0, Total=3782 [2022-03-20 19:03:03,057 INFO L87 Difference]: Start difference. First operand 83 states and 86 transitions. Second operand has 62 states, 62 states have (on average 1.1290322580645162) internal successors, (70), 61 states have internal predecessors, (70), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 19:03:05,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 19:03:05,829 INFO L93 Difference]: Finished difference Result 165 states and 174 transitions. [2022-03-20 19:03:05,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2022-03-20 19:03:05,830 INFO L78 Accepts]: Start accepts. Automaton has has 62 states, 62 states have (on average 1.1290322580645162) internal successors, (70), 61 states have internal predecessors, (70), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 77 [2022-03-20 19:03:05,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 19:03:05,830 INFO L225 Difference]: With dead ends: 165 [2022-03-20 19:03:05,830 INFO L226 Difference]: Without dead ends: 89 [2022-03-20 19:03:05,832 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 119 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1711 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=531, Invalid=13989, Unknown=0, NotChecked=0, Total=14520 [2022-03-20 19:03:05,832 INFO L913 BasicCegarLoop]: 19 mSDtfsCounter, 20 mSDsluCounter, 182 mSDsCounter, 0 mSdLazyCounter, 4167 mSolverCounterSat, 128 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 201 SdHoareTripleChecker+Invalid, 4295 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 128 IncrementalHoareTripleChecker+Valid, 4167 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-03-20 19:03:05,832 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 201 Invalid, 4295 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [128 Valid, 4167 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-03-20 19:03:05,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2022-03-20 19:03:05,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 84. [2022-03-20 19:03:05,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 75 states have (on average 1.0533333333333332) internal successors, (79), 76 states have internal predecessors, (79), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-20 19:03:05,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 87 transitions. [2022-03-20 19:03:05,901 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 87 transitions. Word has length 77 [2022-03-20 19:03:05,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 19:03:05,901 INFO L478 AbstractCegarLoop]: Abstraction has 84 states and 87 transitions. [2022-03-20 19:03:05,901 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 62 states, 62 states have (on average 1.1290322580645162) internal successors, (70), 61 states have internal predecessors, (70), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 19:03:05,901 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 87 transitions. [2022-03-20 19:03:05,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2022-03-20 19:03:05,902 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 19:03:05,902 INFO L499 BasicCegarLoop]: trace histogram [58, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 19:03:05,902 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2022-03-20 19:03:05,902 INFO L403 AbstractCegarLoop]: === Iteration 63 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 19:03:05,902 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 19:03:05,902 INFO L85 PathProgramCache]: Analyzing trace with hash -1594411998, now seen corresponding path program 58 times [2022-03-20 19:03:05,902 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 19:03:05,902 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1444853083] [2022-03-20 19:03:06,083 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 19:03:06,084 INFO L85 PathProgramCache]: Analyzing trace with hash 358753400, now seen corresponding path program 1 times [2022-03-20 19:03:06,084 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:03:06,084 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [205022235] [2022-03-20 19:03:06,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:03:06,084 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:03:06,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:03:06,118 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 19:03:06,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:03:06,121 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 19:03:06,122 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 19:03:06,122 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [205022235] [2022-03-20 19:03:06,122 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [205022235] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:03:06,122 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:03:06,122 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 19:03:07,657 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 19:03:07,658 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1444853083] [2022-03-20 19:03:07,658 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1444853083] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:03:07,658 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:03:07,658 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [63] imperfect sequences [] total 63 [2022-03-20 19:03:07,658 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1165102453] [2022-03-20 19:03:07,658 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 19:03:07,658 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2022-03-20 19:03:07,658 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 19:03:07,658 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2022-03-20 19:03:07,659 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=182, Invalid=3724, Unknown=0, NotChecked=0, Total=3906 [2022-03-20 19:03:07,659 INFO L87 Difference]: Start difference. First operand 84 states and 87 transitions. Second operand has 63 states, 63 states have (on average 1.126984126984127) internal successors, (71), 62 states have internal predecessors, (71), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 19:03:10,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 19:03:10,594 INFO L93 Difference]: Finished difference Result 167 states and 176 transitions. [2022-03-20 19:03:10,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2022-03-20 19:03:10,595 INFO L78 Accepts]: Start accepts. Automaton has has 63 states, 63 states have (on average 1.126984126984127) internal successors, (71), 62 states have internal predecessors, (71), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 78 [2022-03-20 19:03:10,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 19:03:10,595 INFO L225 Difference]: With dead ends: 167 [2022-03-20 19:03:10,595 INFO L226 Difference]: Without dead ends: 90 [2022-03-20 19:03:10,596 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 121 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1770 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=540, Invalid=14466, Unknown=0, NotChecked=0, Total=15006 [2022-03-20 19:03:10,597 INFO L913 BasicCegarLoop]: 19 mSDtfsCounter, 20 mSDsluCounter, 212 mSDsCounter, 0 mSdLazyCounter, 4373 mSolverCounterSat, 130 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 231 SdHoareTripleChecker+Invalid, 4503 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 130 IncrementalHoareTripleChecker+Valid, 4373 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-03-20 19:03:10,597 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 231 Invalid, 4503 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [130 Valid, 4373 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-03-20 19:03:10,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2022-03-20 19:03:10,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 85. [2022-03-20 19:03:10,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 76 states have (on average 1.0526315789473684) internal successors, (80), 77 states have internal predecessors, (80), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-20 19:03:10,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 88 transitions. [2022-03-20 19:03:10,643 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 88 transitions. Word has length 78 [2022-03-20 19:03:10,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 19:03:10,643 INFO L478 AbstractCegarLoop]: Abstraction has 85 states and 88 transitions. [2022-03-20 19:03:10,643 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 63 states, 63 states have (on average 1.126984126984127) internal successors, (71), 62 states have internal predecessors, (71), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 19:03:10,643 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 88 transitions. [2022-03-20 19:03:10,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2022-03-20 19:03:10,644 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 19:03:10,644 INFO L499 BasicCegarLoop]: trace histogram [59, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 19:03:10,644 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2022-03-20 19:03:10,644 INFO L403 AbstractCegarLoop]: === Iteration 64 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 19:03:10,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 19:03:10,644 INFO L85 PathProgramCache]: Analyzing trace with hash -1229849086, now seen corresponding path program 59 times [2022-03-20 19:03:10,644 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 19:03:10,645 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1032088712] [2022-03-20 19:03:10,815 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 19:03:10,815 INFO L85 PathProgramCache]: Analyzing trace with hash 417858744, now seen corresponding path program 1 times [2022-03-20 19:03:10,815 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:03:10,815 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1992571458] [2022-03-20 19:03:10,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:03:10,815 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:03:10,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:03:10,845 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 19:03:10,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:03:10,847 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 19:03:10,847 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 19:03:10,848 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1992571458] [2022-03-20 19:03:10,848 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1992571458] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:03:10,848 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:03:10,848 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 19:03:12,504 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 19:03:12,504 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1032088712] [2022-03-20 19:03:12,505 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1032088712] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:03:12,505 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:03:12,505 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [64] imperfect sequences [] total 64 [2022-03-20 19:03:12,505 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1924700483] [2022-03-20 19:03:12,505 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 19:03:12,505 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 64 states [2022-03-20 19:03:12,505 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 19:03:12,505 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2022-03-20 19:03:12,506 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=185, Invalid=3847, Unknown=0, NotChecked=0, Total=4032 [2022-03-20 19:03:12,506 INFO L87 Difference]: Start difference. First operand 85 states and 88 transitions. Second operand has 64 states, 64 states have (on average 1.125) internal successors, (72), 63 states have internal predecessors, (72), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 19:03:15,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 19:03:15,433 INFO L93 Difference]: Finished difference Result 169 states and 178 transitions. [2022-03-20 19:03:15,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2022-03-20 19:03:15,433 INFO L78 Accepts]: Start accepts. Automaton has has 64 states, 64 states have (on average 1.125) internal successors, (72), 63 states have internal predecessors, (72), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 79 [2022-03-20 19:03:15,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 19:03:15,434 INFO L225 Difference]: With dead ends: 169 [2022-03-20 19:03:15,434 INFO L226 Difference]: Without dead ends: 91 [2022-03-20 19:03:15,435 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 123 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1830 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=549, Invalid=14951, Unknown=0, NotChecked=0, Total=15500 [2022-03-20 19:03:15,435 INFO L913 BasicCegarLoop]: 19 mSDtfsCounter, 20 mSDsluCounter, 162 mSDsCounter, 0 mSdLazyCounter, 4356 mSolverCounterSat, 133 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 181 SdHoareTripleChecker+Invalid, 4489 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 133 IncrementalHoareTripleChecker+Valid, 4356 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-03-20 19:03:15,436 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 181 Invalid, 4489 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [133 Valid, 4356 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-03-20 19:03:15,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2022-03-20 19:03:15,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 86. [2022-03-20 19:03:15,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 77 states have (on average 1.051948051948052) internal successors, (81), 78 states have internal predecessors, (81), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-20 19:03:15,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 89 transitions. [2022-03-20 19:03:15,489 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 89 transitions. Word has length 79 [2022-03-20 19:03:15,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 19:03:15,489 INFO L478 AbstractCegarLoop]: Abstraction has 86 states and 89 transitions. [2022-03-20 19:03:15,489 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 64 states, 64 states have (on average 1.125) internal successors, (72), 63 states have internal predecessors, (72), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 19:03:15,489 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 89 transitions. [2022-03-20 19:03:15,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-03-20 19:03:15,490 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 19:03:15,490 INFO L499 BasicCegarLoop]: trace histogram [60, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 19:03:15,490 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2022-03-20 19:03:15,490 INFO L403 AbstractCegarLoop]: === Iteration 65 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 19:03:15,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 19:03:15,490 INFO L85 PathProgramCache]: Analyzing trace with hash 1481666594, now seen corresponding path program 60 times [2022-03-20 19:03:15,490 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 19:03:15,490 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [647167826] [2022-03-20 19:03:15,686 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 19:03:15,687 INFO L85 PathProgramCache]: Analyzing trace with hash 476964088, now seen corresponding path program 1 times [2022-03-20 19:03:15,687 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:03:15,687 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1656135648] [2022-03-20 19:03:15,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:03:15,687 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:03:15,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:03:15,726 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 19:03:15,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:03:15,729 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 19:03:15,729 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 19:03:15,729 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1656135648] [2022-03-20 19:03:15,729 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1656135648] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:03:15,729 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:03:15,729 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 19:03:17,327 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 19:03:17,328 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [647167826] [2022-03-20 19:03:17,328 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [647167826] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:03:17,328 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:03:17,328 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [65] imperfect sequences [] total 65 [2022-03-20 19:03:17,328 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1016989330] [2022-03-20 19:03:17,328 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 19:03:17,328 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 65 states [2022-03-20 19:03:17,328 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 19:03:17,328 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2022-03-20 19:03:17,329 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=188, Invalid=3972, Unknown=0, NotChecked=0, Total=4160 [2022-03-20 19:03:17,329 INFO L87 Difference]: Start difference. First operand 86 states and 89 transitions. Second operand has 65 states, 65 states have (on average 1.123076923076923) internal successors, (73), 64 states have internal predecessors, (73), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 19:03:20,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 19:03:20,452 INFO L93 Difference]: Finished difference Result 171 states and 180 transitions. [2022-03-20 19:03:20,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2022-03-20 19:03:20,453 INFO L78 Accepts]: Start accepts. Automaton has has 65 states, 65 states have (on average 1.123076923076923) internal successors, (73), 64 states have internal predecessors, (73), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 80 [2022-03-20 19:03:20,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 19:03:20,454 INFO L225 Difference]: With dead ends: 171 [2022-03-20 19:03:20,454 INFO L226 Difference]: Without dead ends: 92 [2022-03-20 19:03:20,455 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 125 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1891 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=558, Invalid=15444, Unknown=0, NotChecked=0, Total=16002 [2022-03-20 19:03:20,455 INFO L913 BasicCegarLoop]: 19 mSDtfsCounter, 20 mSDsluCounter, 257 mSDsCounter, 0 mSdLazyCounter, 4749 mSolverCounterSat, 134 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 276 SdHoareTripleChecker+Invalid, 4883 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 134 IncrementalHoareTripleChecker+Valid, 4749 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-03-20 19:03:20,455 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 276 Invalid, 4883 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [134 Valid, 4749 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-03-20 19:03:20,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2022-03-20 19:03:20,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 87. [2022-03-20 19:03:20,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 78 states have (on average 1.0512820512820513) internal successors, (82), 79 states have internal predecessors, (82), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-20 19:03:20,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 90 transitions. [2022-03-20 19:03:20,504 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 90 transitions. Word has length 80 [2022-03-20 19:03:20,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 19:03:20,504 INFO L478 AbstractCegarLoop]: Abstraction has 87 states and 90 transitions. [2022-03-20 19:03:20,504 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 65 states, 65 states have (on average 1.123076923076923) internal successors, (73), 64 states have internal predecessors, (73), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 19:03:20,505 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 90 transitions. [2022-03-20 19:03:20,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2022-03-20 19:03:20,505 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 19:03:20,505 INFO L499 BasicCegarLoop]: trace histogram [61, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 19:03:20,505 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2022-03-20 19:03:20,505 INFO L403 AbstractCegarLoop]: === Iteration 66 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 19:03:20,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 19:03:20,505 INFO L85 PathProgramCache]: Analyzing trace with hash -360693246, now seen corresponding path program 61 times [2022-03-20 19:03:20,505 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 19:03:20,505 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1821675747] [2022-03-20 19:03:20,667 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 19:03:20,667 INFO L85 PathProgramCache]: Analyzing trace with hash 536069432, now seen corresponding path program 1 times [2022-03-20 19:03:20,668 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:03:20,668 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [397749857] [2022-03-20 19:03:20,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:03:20,668 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:03:20,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:03:20,694 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 19:03:20,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:03:20,697 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 19:03:20,697 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 19:03:20,697 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [397749857] [2022-03-20 19:03:20,697 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [397749857] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:03:20,697 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:03:20,697 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 19:03:22,426 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 19:03:22,427 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1821675747] [2022-03-20 19:03:22,427 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1821675747] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:03:22,427 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:03:22,427 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [66] imperfect sequences [] total 66 [2022-03-20 19:03:22,427 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [278955882] [2022-03-20 19:03:22,427 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 19:03:22,427 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2022-03-20 19:03:22,427 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 19:03:22,427 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2022-03-20 19:03:22,428 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=191, Invalid=4099, Unknown=0, NotChecked=0, Total=4290 [2022-03-20 19:03:22,428 INFO L87 Difference]: Start difference. First operand 87 states and 90 transitions. Second operand has 66 states, 66 states have (on average 1.121212121212121) internal successors, (74), 65 states have internal predecessors, (74), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 19:03:25,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 19:03:25,720 INFO L93 Difference]: Finished difference Result 173 states and 182 transitions. [2022-03-20 19:03:25,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2022-03-20 19:03:25,721 INFO L78 Accepts]: Start accepts. Automaton has has 66 states, 66 states have (on average 1.121212121212121) internal successors, (74), 65 states have internal predecessors, (74), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 81 [2022-03-20 19:03:25,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 19:03:25,721 INFO L225 Difference]: With dead ends: 173 [2022-03-20 19:03:25,721 INFO L226 Difference]: Without dead ends: 93 [2022-03-20 19:03:25,722 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 127 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1953 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=567, Invalid=15945, Unknown=0, NotChecked=0, Total=16512 [2022-03-20 19:03:25,723 INFO L913 BasicCegarLoop]: 19 mSDtfsCounter, 20 mSDsluCounter, 292 mSDsCounter, 0 mSdLazyCounter, 4975 mSolverCounterSat, 136 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 311 SdHoareTripleChecker+Invalid, 5111 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 136 IncrementalHoareTripleChecker+Valid, 4975 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-03-20 19:03:25,723 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 311 Invalid, 5111 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [136 Valid, 4975 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-03-20 19:03:25,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2022-03-20 19:03:25,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 88. [2022-03-20 19:03:25,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 79 states have (on average 1.0506329113924051) internal successors, (83), 80 states have internal predecessors, (83), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-20 19:03:25,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 91 transitions. [2022-03-20 19:03:25,776 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 91 transitions. Word has length 81 [2022-03-20 19:03:25,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 19:03:25,783 INFO L478 AbstractCegarLoop]: Abstraction has 88 states and 91 transitions. [2022-03-20 19:03:25,783 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 66 states have (on average 1.121212121212121) internal successors, (74), 65 states have internal predecessors, (74), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 19:03:25,783 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 91 transitions. [2022-03-20 19:03:25,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2022-03-20 19:03:25,783 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 19:03:25,783 INFO L499 BasicCegarLoop]: trace histogram [62, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 19:03:25,783 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2022-03-20 19:03:25,783 INFO L403 AbstractCegarLoop]: === Iteration 67 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 19:03:25,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 19:03:25,784 INFO L85 PathProgramCache]: Analyzing trace with hash -1639273438, now seen corresponding path program 62 times [2022-03-20 19:03:25,784 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 19:03:25,784 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2101248322] [2022-03-20 19:03:25,969 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 19:03:25,970 INFO L85 PathProgramCache]: Analyzing trace with hash 595174776, now seen corresponding path program 1 times [2022-03-20 19:03:25,970 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:03:25,970 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2649885] [2022-03-20 19:03:25,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:03:25,970 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:03:25,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:03:25,998 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 19:03:25,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:03:26,000 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 19:03:26,000 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 19:03:26,001 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2649885] [2022-03-20 19:03:26,001 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2649885] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:03:26,001 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:03:26,001 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 19:03:27,697 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 19:03:27,698 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2101248322] [2022-03-20 19:03:27,698 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2101248322] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:03:27,698 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:03:27,698 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [67] imperfect sequences [] total 67 [2022-03-20 19:03:27,698 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1165347552] [2022-03-20 19:03:27,698 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 19:03:27,698 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 67 states [2022-03-20 19:03:27,698 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 19:03:27,699 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2022-03-20 19:03:27,699 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=194, Invalid=4228, Unknown=0, NotChecked=0, Total=4422 [2022-03-20 19:03:27,699 INFO L87 Difference]: Start difference. First operand 88 states and 91 transitions. Second operand has 67 states, 67 states have (on average 1.1194029850746268) internal successors, (75), 66 states have internal predecessors, (75), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 19:03:31,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 19:03:31,049 INFO L93 Difference]: Finished difference Result 175 states and 184 transitions. [2022-03-20 19:03:31,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2022-03-20 19:03:31,049 INFO L78 Accepts]: Start accepts. Automaton has has 67 states, 67 states have (on average 1.1194029850746268) internal successors, (75), 66 states have internal predecessors, (75), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 82 [2022-03-20 19:03:31,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 19:03:31,050 INFO L225 Difference]: With dead ends: 175 [2022-03-20 19:03:31,050 INFO L226 Difference]: Without dead ends: 94 [2022-03-20 19:03:31,051 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 129 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2016 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=576, Invalid=16454, Unknown=0, NotChecked=0, Total=17030 [2022-03-20 19:03:31,051 INFO L913 BasicCegarLoop]: 19 mSDtfsCounter, 20 mSDsluCounter, 247 mSDsCounter, 0 mSdLazyCounter, 4978 mSolverCounterSat, 139 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 266 SdHoareTripleChecker+Invalid, 5117 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 139 IncrementalHoareTripleChecker+Valid, 4978 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-03-20 19:03:31,051 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 266 Invalid, 5117 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [139 Valid, 4978 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-03-20 19:03:31,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2022-03-20 19:03:31,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 89. [2022-03-20 19:03:31,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 80 states have (on average 1.05) internal successors, (84), 81 states have internal predecessors, (84), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-20 19:03:31,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 92 transitions. [2022-03-20 19:03:31,107 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 92 transitions. Word has length 82 [2022-03-20 19:03:31,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 19:03:31,108 INFO L478 AbstractCegarLoop]: Abstraction has 89 states and 92 transitions. [2022-03-20 19:03:31,108 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 67 states, 67 states have (on average 1.1194029850746268) internal successors, (75), 66 states have internal predecessors, (75), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 19:03:31,108 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 92 transitions. [2022-03-20 19:03:31,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2022-03-20 19:03:31,108 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 19:03:31,108 INFO L499 BasicCegarLoop]: trace histogram [63, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 19:03:31,108 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2022-03-20 19:03:31,108 INFO L403 AbstractCegarLoop]: === Iteration 68 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 19:03:31,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 19:03:31,109 INFO L85 PathProgramCache]: Analyzing trace with hash 1674413570, now seen corresponding path program 63 times [2022-03-20 19:03:31,109 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 19:03:31,109 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1906578119] [2022-03-20 19:03:31,297 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 19:03:31,298 INFO L85 PathProgramCache]: Analyzing trace with hash 654280120, now seen corresponding path program 1 times [2022-03-20 19:03:31,298 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:03:31,298 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [709706104] [2022-03-20 19:03:31,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:03:31,298 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:03:31,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:03:31,329 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 19:03:31,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:03:31,341 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 19:03:31,341 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 19:03:31,342 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [709706104] [2022-03-20 19:03:31,342 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [709706104] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:03:31,342 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:03:31,342 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 19:03:33,050 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 19:03:33,051 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1906578119] [2022-03-20 19:03:33,051 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1906578119] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:03:33,051 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:03:33,051 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [68] imperfect sequences [] total 68 [2022-03-20 19:03:33,051 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1748955876] [2022-03-20 19:03:33,051 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 19:03:33,051 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 68 states [2022-03-20 19:03:33,051 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 19:03:33,051 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2022-03-20 19:03:33,052 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=197, Invalid=4359, Unknown=0, NotChecked=0, Total=4556 [2022-03-20 19:03:33,052 INFO L87 Difference]: Start difference. First operand 89 states and 92 transitions. Second operand has 68 states, 68 states have (on average 1.1176470588235294) internal successors, (76), 67 states have internal predecessors, (76), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 19:03:36,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 19:03:36,407 INFO L93 Difference]: Finished difference Result 177 states and 186 transitions. [2022-03-20 19:03:36,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2022-03-20 19:03:36,408 INFO L78 Accepts]: Start accepts. Automaton has has 68 states, 68 states have (on average 1.1176470588235294) internal successors, (76), 67 states have internal predecessors, (76), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 83 [2022-03-20 19:03:36,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 19:03:36,408 INFO L225 Difference]: With dead ends: 177 [2022-03-20 19:03:36,408 INFO L226 Difference]: Without dead ends: 95 [2022-03-20 19:03:36,410 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 131 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2080 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=585, Invalid=16971, Unknown=0, NotChecked=0, Total=17556 [2022-03-20 19:03:36,410 INFO L913 BasicCegarLoop]: 19 mSDtfsCounter, 20 mSDsluCounter, 252 mSDsCounter, 0 mSdLazyCounter, 5125 mSolverCounterSat, 140 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 271 SdHoareTripleChecker+Invalid, 5265 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 140 IncrementalHoareTripleChecker+Valid, 5125 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-03-20 19:03:36,410 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 271 Invalid, 5265 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [140 Valid, 5125 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-03-20 19:03:36,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2022-03-20 19:03:36,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 90. [2022-03-20 19:03:36,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 81 states have (on average 1.0493827160493827) internal successors, (85), 82 states have internal predecessors, (85), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-20 19:03:36,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 93 transitions. [2022-03-20 19:03:36,468 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 93 transitions. Word has length 83 [2022-03-20 19:03:36,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 19:03:36,468 INFO L478 AbstractCegarLoop]: Abstraction has 90 states and 93 transitions. [2022-03-20 19:03:36,468 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 68 states, 68 states have (on average 1.1176470588235294) internal successors, (76), 67 states have internal predecessors, (76), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 19:03:36,468 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 93 transitions. [2022-03-20 19:03:36,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2022-03-20 19:03:36,468 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 19:03:36,468 INFO L499 BasicCegarLoop]: trace histogram [64, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 19:03:36,468 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2022-03-20 19:03:36,469 INFO L403 AbstractCegarLoop]: === Iteration 69 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 19:03:36,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 19:03:36,469 INFO L85 PathProgramCache]: Analyzing trace with hash 1319495714, now seen corresponding path program 64 times [2022-03-20 19:03:36,469 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 19:03:36,469 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2135068896] [2022-03-20 19:03:36,644 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 19:03:36,644 INFO L85 PathProgramCache]: Analyzing trace with hash 713385464, now seen corresponding path program 1 times [2022-03-20 19:03:36,644 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:03:36,644 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [459840470] [2022-03-20 19:03:36,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:03:36,645 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:03:36,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:03:36,672 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 19:03:36,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:03:36,679 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 19:03:36,679 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 19:03:36,679 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [459840470] [2022-03-20 19:03:36,679 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [459840470] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:03:36,679 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:03:36,679 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 19:03:38,435 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 19:03:38,436 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2135068896] [2022-03-20 19:03:38,436 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2135068896] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:03:38,436 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:03:38,436 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [69] imperfect sequences [] total 69 [2022-03-20 19:03:38,436 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [988139511] [2022-03-20 19:03:38,436 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 19:03:38,436 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 69 states [2022-03-20 19:03:38,436 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 19:03:38,436 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2022-03-20 19:03:38,437 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=200, Invalid=4492, Unknown=0, NotChecked=0, Total=4692 [2022-03-20 19:03:38,437 INFO L87 Difference]: Start difference. First operand 90 states and 93 transitions. Second operand has 69 states, 69 states have (on average 1.1159420289855073) internal successors, (77), 68 states have internal predecessors, (77), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 19:03:41,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 19:03:41,727 INFO L93 Difference]: Finished difference Result 179 states and 188 transitions. [2022-03-20 19:03:41,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2022-03-20 19:03:41,727 INFO L78 Accepts]: Start accepts. Automaton has has 69 states, 69 states have (on average 1.1159420289855073) internal successors, (77), 68 states have internal predecessors, (77), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 84 [2022-03-20 19:03:41,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 19:03:41,728 INFO L225 Difference]: With dead ends: 179 [2022-03-20 19:03:41,728 INFO L226 Difference]: Without dead ends: 96 [2022-03-20 19:03:41,729 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 133 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2145 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=594, Invalid=17496, Unknown=0, NotChecked=0, Total=18090 [2022-03-20 19:03:41,729 INFO L913 BasicCegarLoop]: 19 mSDtfsCounter, 20 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 4740 mSolverCounterSat, 143 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 86 SdHoareTripleChecker+Invalid, 4883 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 143 IncrementalHoareTripleChecker+Valid, 4740 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-03-20 19:03:41,729 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 86 Invalid, 4883 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [143 Valid, 4740 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-03-20 19:03:41,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2022-03-20 19:03:41,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 91. [2022-03-20 19:03:41,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 82 states have (on average 1.048780487804878) internal successors, (86), 83 states have internal predecessors, (86), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-20 19:03:41,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 94 transitions. [2022-03-20 19:03:41,796 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 94 transitions. Word has length 84 [2022-03-20 19:03:41,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 19:03:41,797 INFO L478 AbstractCegarLoop]: Abstraction has 91 states and 94 transitions. [2022-03-20 19:03:41,797 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 69 states, 69 states have (on average 1.1159420289855073) internal successors, (77), 68 states have internal predecessors, (77), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 19:03:41,797 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 94 transitions. [2022-03-20 19:03:41,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2022-03-20 19:03:41,797 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 19:03:41,797 INFO L499 BasicCegarLoop]: trace histogram [65, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 19:03:41,797 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2022-03-20 19:03:41,797 INFO L403 AbstractCegarLoop]: === Iteration 70 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 19:03:41,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 19:03:41,798 INFO L85 PathProgramCache]: Analyzing trace with hash -1093023230, now seen corresponding path program 65 times [2022-03-20 19:03:41,798 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 19:03:41,798 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1129328567] [2022-03-20 19:03:42,013 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 19:03:42,014 INFO L85 PathProgramCache]: Analyzing trace with hash 772490808, now seen corresponding path program 1 times [2022-03-20 19:03:42,014 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:03:42,014 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [118489174] [2022-03-20 19:03:42,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:03:42,014 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:03:42,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:03:42,051 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 19:03:42,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:03:42,053 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 19:03:42,053 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 19:03:42,053 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [118489174] [2022-03-20 19:03:42,053 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [118489174] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:03:42,053 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:03:42,054 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 19:03:43,929 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 19:03:43,929 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1129328567] [2022-03-20 19:03:43,929 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1129328567] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:03:43,929 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:03:43,929 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [70] imperfect sequences [] total 70 [2022-03-20 19:03:43,929 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1546817075] [2022-03-20 19:03:43,929 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 19:03:43,929 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 70 states [2022-03-20 19:03:43,929 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 19:03:43,930 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2022-03-20 19:03:43,930 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=203, Invalid=4627, Unknown=0, NotChecked=0, Total=4830 [2022-03-20 19:03:43,930 INFO L87 Difference]: Start difference. First operand 91 states and 94 transitions. Second operand has 70 states, 70 states have (on average 1.1142857142857143) internal successors, (78), 69 states have internal predecessors, (78), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 19:03:47,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 19:03:47,246 INFO L93 Difference]: Finished difference Result 181 states and 190 transitions. [2022-03-20 19:03:47,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2022-03-20 19:03:47,246 INFO L78 Accepts]: Start accepts. Automaton has has 70 states, 70 states have (on average 1.1142857142857143) internal successors, (78), 69 states have internal predecessors, (78), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 85 [2022-03-20 19:03:47,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 19:03:47,247 INFO L225 Difference]: With dead ends: 181 [2022-03-20 19:03:47,247 INFO L226 Difference]: Without dead ends: 97 [2022-03-20 19:03:47,248 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 135 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2211 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=603, Invalid=18029, Unknown=0, NotChecked=0, Total=18632 [2022-03-20 19:03:47,248 INFO L913 BasicCegarLoop]: 19 mSDtfsCounter, 20 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 4722 mSolverCounterSat, 145 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 4867 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 145 IncrementalHoareTripleChecker+Valid, 4722 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-03-20 19:03:47,248 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 31 Invalid, 4867 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [145 Valid, 4722 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-03-20 19:03:47,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2022-03-20 19:03:47,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 92. [2022-03-20 19:03:47,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 83 states have (on average 1.0481927710843373) internal successors, (87), 84 states have internal predecessors, (87), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-20 19:03:47,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 95 transitions. [2022-03-20 19:03:47,306 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 95 transitions. Word has length 85 [2022-03-20 19:03:47,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 19:03:47,306 INFO L478 AbstractCegarLoop]: Abstraction has 92 states and 95 transitions. [2022-03-20 19:03:47,306 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 70 states, 70 states have (on average 1.1142857142857143) internal successors, (78), 69 states have internal predecessors, (78), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 19:03:47,306 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 95 transitions. [2022-03-20 19:03:47,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2022-03-20 19:03:47,307 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 19:03:47,307 INFO L499 BasicCegarLoop]: trace histogram [66, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 19:03:47,307 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2022-03-20 19:03:47,307 INFO L403 AbstractCegarLoop]: === Iteration 71 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 19:03:47,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 19:03:47,307 INFO L85 PathProgramCache]: Analyzing trace with hash 1428300834, now seen corresponding path program 66 times [2022-03-20 19:03:47,307 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 19:03:47,307 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1107125064] [2022-03-20 19:03:47,484 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 19:03:47,484 INFO L85 PathProgramCache]: Analyzing trace with hash 831596152, now seen corresponding path program 1 times [2022-03-20 19:03:47,484 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:03:47,485 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1052472661] [2022-03-20 19:03:47,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:03:47,485 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:03:47,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:03:47,511 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 19:03:47,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:03:47,516 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 19:03:47,516 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 19:03:47,516 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1052472661] [2022-03-20 19:03:47,516 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1052472661] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:03:47,516 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:03:47,516 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 19:03:49,387 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 19:03:49,388 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1107125064] [2022-03-20 19:03:49,388 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1107125064] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:03:49,388 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:03:49,388 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [71] imperfect sequences [] total 71 [2022-03-20 19:03:49,388 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1088797371] [2022-03-20 19:03:49,388 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 19:03:49,388 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 71 states [2022-03-20 19:03:49,388 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 19:03:49,388 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2022-03-20 19:03:49,389 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=206, Invalid=4764, Unknown=0, NotChecked=0, Total=4970 [2022-03-20 19:03:49,389 INFO L87 Difference]: Start difference. First operand 92 states and 95 transitions. Second operand has 71 states, 71 states have (on average 1.1126760563380282) internal successors, (79), 70 states have internal predecessors, (79), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 19:03:53,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 19:03:53,080 INFO L93 Difference]: Finished difference Result 183 states and 192 transitions. [2022-03-20 19:03:53,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2022-03-20 19:03:53,081 INFO L78 Accepts]: Start accepts. Automaton has has 71 states, 71 states have (on average 1.1126760563380282) internal successors, (79), 70 states have internal predecessors, (79), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 86 [2022-03-20 19:03:53,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 19:03:53,081 INFO L225 Difference]: With dead ends: 183 [2022-03-20 19:03:53,081 INFO L226 Difference]: Without dead ends: 98 [2022-03-20 19:03:53,082 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 137 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2278 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=612, Invalid=18570, Unknown=0, NotChecked=0, Total=19182 [2022-03-20 19:03:53,082 INFO L913 BasicCegarLoop]: 19 mSDtfsCounter, 20 mSDsluCounter, 262 mSDsCounter, 0 mSdLazyCounter, 5560 mSolverCounterSat, 147 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 281 SdHoareTripleChecker+Invalid, 5707 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 147 IncrementalHoareTripleChecker+Valid, 5560 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-03-20 19:03:53,083 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 281 Invalid, 5707 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [147 Valid, 5560 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2022-03-20 19:03:53,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2022-03-20 19:03:53,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 93. [2022-03-20 19:03:53,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 84 states have (on average 1.0476190476190477) internal successors, (88), 85 states have internal predecessors, (88), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-20 19:03:53,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 96 transitions. [2022-03-20 19:03:53,139 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 96 transitions. Word has length 86 [2022-03-20 19:03:53,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 19:03:53,139 INFO L478 AbstractCegarLoop]: Abstraction has 93 states and 96 transitions. [2022-03-20 19:03:53,140 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 71 states, 71 states have (on average 1.1126760563380282) internal successors, (79), 70 states have internal predecessors, (79), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 19:03:53,140 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 96 transitions. [2022-03-20 19:03:53,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2022-03-20 19:03:53,140 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 19:03:53,140 INFO L499 BasicCegarLoop]: trace histogram [67, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 19:03:53,140 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2022-03-20 19:03:53,140 INFO L403 AbstractCegarLoop]: === Iteration 72 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 19:03:53,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 19:03:53,141 INFO L85 PathProgramCache]: Analyzing trace with hash -2015031806, now seen corresponding path program 67 times [2022-03-20 19:03:53,141 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 19:03:53,141 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [219560278] [2022-03-20 19:03:53,274 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 19:03:53,275 INFO L85 PathProgramCache]: Analyzing trace with hash 890701496, now seen corresponding path program 1 times [2022-03-20 19:03:53,275 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:03:53,275 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [725972737] [2022-03-20 19:03:53,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:03:53,275 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:03:53,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:03:53,295 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 19:03:53,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:03:53,308 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 19:03:53,308 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 19:03:53,308 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [725972737] [2022-03-20 19:03:53,308 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [725972737] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:03:53,308 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:03:53,308 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 19:03:55,223 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 19:03:55,223 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [219560278] [2022-03-20 19:03:55,223 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [219560278] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:03:55,223 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:03:55,223 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [72] imperfect sequences [] total 72 [2022-03-20 19:03:55,223 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [241438475] [2022-03-20 19:03:55,223 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 19:03:55,223 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 72 states [2022-03-20 19:03:55,223 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 19:03:55,224 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2022-03-20 19:03:55,225 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=209, Invalid=4903, Unknown=0, NotChecked=0, Total=5112 [2022-03-20 19:03:55,225 INFO L87 Difference]: Start difference. First operand 93 states and 96 transitions. Second operand has 72 states, 72 states have (on average 1.1111111111111112) internal successors, (80), 71 states have internal predecessors, (80), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 19:03:59,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 19:03:59,156 INFO L93 Difference]: Finished difference Result 185 states and 194 transitions. [2022-03-20 19:03:59,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2022-03-20 19:03:59,157 INFO L78 Accepts]: Start accepts. Automaton has has 72 states, 72 states have (on average 1.1111111111111112) internal successors, (80), 71 states have internal predecessors, (80), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 87 [2022-03-20 19:03:59,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 19:03:59,158 INFO L225 Difference]: With dead ends: 185 [2022-03-20 19:03:59,158 INFO L226 Difference]: Without dead ends: 99 [2022-03-20 19:03:59,159 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 139 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2346 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=621, Invalid=19119, Unknown=0, NotChecked=0, Total=19740 [2022-03-20 19:03:59,159 INFO L913 BasicCegarLoop]: 19 mSDtfsCounter, 20 mSDsluCounter, 337 mSDsCounter, 0 mSdLazyCounter, 5911 mSolverCounterSat, 148 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 356 SdHoareTripleChecker+Invalid, 6059 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 148 IncrementalHoareTripleChecker+Valid, 5911 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-03-20 19:03:59,159 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 356 Invalid, 6059 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [148 Valid, 5911 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2022-03-20 19:03:59,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2022-03-20 19:03:59,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 94. [2022-03-20 19:03:59,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 85 states have (on average 1.0470588235294118) internal successors, (89), 86 states have internal predecessors, (89), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-20 19:03:59,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 97 transitions. [2022-03-20 19:03:59,223 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 97 transitions. Word has length 87 [2022-03-20 19:03:59,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 19:03:59,224 INFO L478 AbstractCegarLoop]: Abstraction has 94 states and 97 transitions. [2022-03-20 19:03:59,224 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 72 states, 72 states have (on average 1.1111111111111112) internal successors, (80), 71 states have internal predecessors, (80), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 19:03:59,224 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 97 transitions. [2022-03-20 19:03:59,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2022-03-20 19:03:59,224 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 19:03:59,224 INFO L499 BasicCegarLoop]: trace histogram [68, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 19:03:59,224 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2022-03-20 19:03:59,224 INFO L403 AbstractCegarLoop]: === Iteration 73 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 19:03:59,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 19:03:59,225 INFO L85 PathProgramCache]: Analyzing trace with hash -1384161246, now seen corresponding path program 68 times [2022-03-20 19:03:59,225 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 19:03:59,225 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1093862609] [2022-03-20 19:03:59,428 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 19:03:59,429 INFO L85 PathProgramCache]: Analyzing trace with hash 949806840, now seen corresponding path program 1 times [2022-03-20 19:03:59,429 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:03:59,429 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1347591929] [2022-03-20 19:03:59,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:03:59,429 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:03:59,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:03:59,463 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 19:03:59,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:03:59,466 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 19:03:59,466 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 19:03:59,466 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1347591929] [2022-03-20 19:03:59,466 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1347591929] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:03:59,466 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:03:59,466 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 19:04:01,474 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 19:04:01,474 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1093862609] [2022-03-20 19:04:01,474 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1093862609] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:04:01,474 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:04:01,474 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [73] imperfect sequences [] total 73 [2022-03-20 19:04:01,474 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1946791535] [2022-03-20 19:04:01,474 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 19:04:01,475 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 73 states [2022-03-20 19:04:01,475 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 19:04:01,475 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2022-03-20 19:04:01,475 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=5044, Unknown=0, NotChecked=0, Total=5256 [2022-03-20 19:04:01,475 INFO L87 Difference]: Start difference. First operand 94 states and 97 transitions. Second operand has 73 states, 73 states have (on average 1.1095890410958904) internal successors, (81), 72 states have internal predecessors, (81), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 19:04:05,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 19:04:05,319 INFO L93 Difference]: Finished difference Result 187 states and 196 transitions. [2022-03-20 19:04:05,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2022-03-20 19:04:05,319 INFO L78 Accepts]: Start accepts. Automaton has has 73 states, 73 states have (on average 1.1095890410958904) internal successors, (81), 72 states have internal predecessors, (81), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 88 [2022-03-20 19:04:05,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 19:04:05,320 INFO L225 Difference]: With dead ends: 187 [2022-03-20 19:04:05,320 INFO L226 Difference]: Without dead ends: 100 [2022-03-20 19:04:05,321 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 141 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2415 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=630, Invalid=19676, Unknown=0, NotChecked=0, Total=20306 [2022-03-20 19:04:05,321 INFO L913 BasicCegarLoop]: 19 mSDtfsCounter, 20 mSDsluCounter, 247 mSDsCounter, 0 mSdLazyCounter, 5801 mSolverCounterSat, 150 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 266 SdHoareTripleChecker+Invalid, 5951 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 150 IncrementalHoareTripleChecker+Valid, 5801 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-03-20 19:04:05,321 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 266 Invalid, 5951 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [150 Valid, 5801 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2022-03-20 19:04:05,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2022-03-20 19:04:05,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 95. [2022-03-20 19:04:05,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 86 states have (on average 1.0465116279069768) internal successors, (90), 87 states have internal predecessors, (90), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-20 19:04:05,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 98 transitions. [2022-03-20 19:04:05,382 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 98 transitions. Word has length 88 [2022-03-20 19:04:05,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 19:04:05,382 INFO L478 AbstractCegarLoop]: Abstraction has 95 states and 98 transitions. [2022-03-20 19:04:05,382 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 73 states, 73 states have (on average 1.1095890410958904) internal successors, (81), 72 states have internal predecessors, (81), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 19:04:05,383 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 98 transitions. [2022-03-20 19:04:05,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2022-03-20 19:04:05,383 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 19:04:05,383 INFO L499 BasicCegarLoop]: trace histogram [69, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 19:04:05,383 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2022-03-20 19:04:05,383 INFO L403 AbstractCegarLoop]: === Iteration 74 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 19:04:05,383 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 19:04:05,383 INFO L85 PathProgramCache]: Analyzing trace with hash 992956930, now seen corresponding path program 69 times [2022-03-20 19:04:05,383 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 19:04:05,383 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1523667119] [2022-03-20 19:04:05,574 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 19:04:05,575 INFO L85 PathProgramCache]: Analyzing trace with hash 1008912184, now seen corresponding path program 1 times [2022-03-20 19:04:05,575 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:04:05,575 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [309426301] [2022-03-20 19:04:05,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:04:05,575 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:04:05,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:04:05,606 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 19:04:05,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:04:05,608 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 19:04:05,608 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 19:04:05,608 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [309426301] [2022-03-20 19:04:05,608 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [309426301] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:04:05,608 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:04:05,608 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 19:04:07,638 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 19:04:07,639 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1523667119] [2022-03-20 19:04:07,639 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1523667119] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:04:07,639 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:04:07,639 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [74] imperfect sequences [] total 74 [2022-03-20 19:04:07,639 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [218959548] [2022-03-20 19:04:07,639 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 19:04:07,639 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 74 states [2022-03-20 19:04:07,639 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 19:04:07,639 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2022-03-20 19:04:07,640 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=215, Invalid=5187, Unknown=0, NotChecked=0, Total=5402 [2022-03-20 19:04:07,640 INFO L87 Difference]: Start difference. First operand 95 states and 98 transitions. Second operand has 74 states, 74 states have (on average 1.1081081081081081) internal successors, (82), 73 states have internal predecessors, (82), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 19:04:11,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 19:04:11,685 INFO L93 Difference]: Finished difference Result 189 states and 198 transitions. [2022-03-20 19:04:11,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2022-03-20 19:04:11,685 INFO L78 Accepts]: Start accepts. Automaton has has 74 states, 74 states have (on average 1.1081081081081081) internal successors, (82), 73 states have internal predecessors, (82), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 89 [2022-03-20 19:04:11,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 19:04:11,686 INFO L225 Difference]: With dead ends: 189 [2022-03-20 19:04:11,686 INFO L226 Difference]: Without dead ends: 101 [2022-03-20 19:04:11,688 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 143 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2485 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=639, Invalid=20241, Unknown=0, NotChecked=0, Total=20880 [2022-03-20 19:04:11,688 INFO L913 BasicCegarLoop]: 19 mSDtfsCounter, 20 mSDsluCounter, 277 mSDsCounter, 0 mSdLazyCounter, 6029 mSolverCounterSat, 152 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 296 SdHoareTripleChecker+Invalid, 6181 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 152 IncrementalHoareTripleChecker+Valid, 6029 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-03-20 19:04:11,688 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 296 Invalid, 6181 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [152 Valid, 6029 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2022-03-20 19:04:11,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2022-03-20 19:04:11,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 96. [2022-03-20 19:04:11,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 87 states have (on average 1.0459770114942528) internal successors, (91), 88 states have internal predecessors, (91), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-20 19:04:11,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 99 transitions. [2022-03-20 19:04:11,749 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 99 transitions. Word has length 89 [2022-03-20 19:04:11,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 19:04:11,749 INFO L478 AbstractCegarLoop]: Abstraction has 96 states and 99 transitions. [2022-03-20 19:04:11,749 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 74 states, 74 states have (on average 1.1081081081081081) internal successors, (82), 73 states have internal predecessors, (82), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 19:04:11,749 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 99 transitions. [2022-03-20 19:04:11,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2022-03-20 19:04:11,749 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 19:04:11,750 INFO L499 BasicCegarLoop]: trace histogram [70, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 19:04:11,750 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2022-03-20 19:04:11,750 INFO L403 AbstractCegarLoop]: === Iteration 75 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 19:04:11,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 19:04:11,750 INFO L85 PathProgramCache]: Analyzing trace with hash 1669176354, now seen corresponding path program 70 times [2022-03-20 19:04:11,750 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 19:04:11,750 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1200682808] [2022-03-20 19:04:11,934 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 19:04:11,935 INFO L85 PathProgramCache]: Analyzing trace with hash 1068017528, now seen corresponding path program 1 times [2022-03-20 19:04:11,935 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:04:11,935 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1387495336] [2022-03-20 19:04:11,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:04:11,935 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:04:11,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:04:11,966 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 19:04:11,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:04:11,968 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 19:04:11,968 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 19:04:11,968 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1387495336] [2022-03-20 19:04:11,968 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1387495336] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:04:11,968 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:04:11,968 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 19:04:14,062 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 19:04:14,062 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1200682808] [2022-03-20 19:04:14,062 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1200682808] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:04:14,062 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:04:14,062 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [75] imperfect sequences [] total 75 [2022-03-20 19:04:14,063 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1480198232] [2022-03-20 19:04:14,063 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 19:04:14,063 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 75 states [2022-03-20 19:04:14,063 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 19:04:14,063 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2022-03-20 19:04:14,063 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=218, Invalid=5332, Unknown=0, NotChecked=0, Total=5550 [2022-03-20 19:04:14,064 INFO L87 Difference]: Start difference. First operand 96 states and 99 transitions. Second operand has 75 states, 75 states have (on average 1.1066666666666667) internal successors, (83), 74 states have internal predecessors, (83), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 19:04:18,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 19:04:18,038 INFO L93 Difference]: Finished difference Result 191 states and 200 transitions. [2022-03-20 19:04:18,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2022-03-20 19:04:18,038 INFO L78 Accepts]: Start accepts. Automaton has has 75 states, 75 states have (on average 1.1066666666666667) internal successors, (83), 74 states have internal predecessors, (83), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 90 [2022-03-20 19:04:18,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 19:04:18,039 INFO L225 Difference]: With dead ends: 191 [2022-03-20 19:04:18,039 INFO L226 Difference]: Without dead ends: 102 [2022-03-20 19:04:18,040 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 145 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2556 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=648, Invalid=20814, Unknown=0, NotChecked=0, Total=21462 [2022-03-20 19:04:18,040 INFO L913 BasicCegarLoop]: 19 mSDtfsCounter, 20 mSDsluCounter, 212 mSDsCounter, 0 mSdLazyCounter, 5993 mSolverCounterSat, 154 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 231 SdHoareTripleChecker+Invalid, 6147 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 154 IncrementalHoareTripleChecker+Valid, 5993 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-03-20 19:04:18,040 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 231 Invalid, 6147 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [154 Valid, 5993 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2022-03-20 19:04:18,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2022-03-20 19:04:18,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 97. [2022-03-20 19:04:18,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 88 states have (on average 1.0454545454545454) internal successors, (92), 89 states have internal predecessors, (92), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-20 19:04:18,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 100 transitions. [2022-03-20 19:04:18,109 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 100 transitions. Word has length 90 [2022-03-20 19:04:18,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 19:04:18,109 INFO L478 AbstractCegarLoop]: Abstraction has 97 states and 100 transitions. [2022-03-20 19:04:18,109 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 75 states, 75 states have (on average 1.1066666666666667) internal successors, (83), 74 states have internal predecessors, (83), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 19:04:18,109 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 100 transitions. [2022-03-20 19:04:18,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2022-03-20 19:04:18,109 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 19:04:18,109 INFO L499 BasicCegarLoop]: trace histogram [71, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 19:04:18,109 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2022-03-20 19:04:18,110 INFO L403 AbstractCegarLoop]: === Iteration 76 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 19:04:18,110 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 19:04:18,110 INFO L85 PathProgramCache]: Analyzing trace with hash 1157142018, now seen corresponding path program 71 times [2022-03-20 19:04:18,110 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 19:04:18,110 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1599232002] [2022-03-20 19:04:18,322 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 19:04:18,323 INFO L85 PathProgramCache]: Analyzing trace with hash 1127122872, now seen corresponding path program 1 times [2022-03-20 19:04:18,323 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:04:18,323 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1051034540] [2022-03-20 19:04:18,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:04:18,323 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:04:18,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:04:18,358 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 19:04:18,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:04:18,360 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 19:04:18,360 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 19:04:18,361 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1051034540] [2022-03-20 19:04:18,361 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1051034540] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:04:18,361 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:04:18,361 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 19:04:20,512 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 19:04:20,512 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1599232002] [2022-03-20 19:04:20,512 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1599232002] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:04:20,512 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:04:20,512 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [76] imperfect sequences [] total 76 [2022-03-20 19:04:20,512 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1504151] [2022-03-20 19:04:20,512 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 19:04:20,512 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 76 states [2022-03-20 19:04:20,512 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 19:04:20,513 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2022-03-20 19:04:20,513 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=221, Invalid=5479, Unknown=0, NotChecked=0, Total=5700 [2022-03-20 19:04:20,513 INFO L87 Difference]: Start difference. First operand 97 states and 100 transitions. Second operand has 76 states, 76 states have (on average 1.105263157894737) internal successors, (84), 75 states have internal predecessors, (84), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 19:04:24,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 19:04:24,444 INFO L93 Difference]: Finished difference Result 193 states and 202 transitions. [2022-03-20 19:04:24,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2022-03-20 19:04:24,445 INFO L78 Accepts]: Start accepts. Automaton has has 76 states, 76 states have (on average 1.105263157894737) internal successors, (84), 75 states have internal predecessors, (84), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 91 [2022-03-20 19:04:24,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 19:04:24,445 INFO L225 Difference]: With dead ends: 193 [2022-03-20 19:04:24,445 INFO L226 Difference]: Without dead ends: 103 [2022-03-20 19:04:24,447 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 147 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2628 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=657, Invalid=21395, Unknown=0, NotChecked=0, Total=22052 [2022-03-20 19:04:24,447 INFO L913 BasicCegarLoop]: 19 mSDtfsCounter, 20 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 5679 mSolverCounterSat, 156 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 5835 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 156 IncrementalHoareTripleChecker+Valid, 5679 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-03-20 19:04:24,447 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 66 Invalid, 5835 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [156 Valid, 5679 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2022-03-20 19:04:24,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2022-03-20 19:04:24,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 98. [2022-03-20 19:04:24,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 89 states have (on average 1.0449438202247192) internal successors, (93), 90 states have internal predecessors, (93), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-20 19:04:24,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 101 transitions. [2022-03-20 19:04:24,511 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 101 transitions. Word has length 91 [2022-03-20 19:04:24,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 19:04:24,511 INFO L478 AbstractCegarLoop]: Abstraction has 98 states and 101 transitions. [2022-03-20 19:04:24,511 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 76 states, 76 states have (on average 1.105263157894737) internal successors, (84), 75 states have internal predecessors, (84), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 19:04:24,511 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 101 transitions. [2022-03-20 19:04:24,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2022-03-20 19:04:24,512 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 19:04:24,512 INFO L499 BasicCegarLoop]: trace histogram [72, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 19:04:24,512 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2022-03-20 19:04:24,512 INFO L403 AbstractCegarLoop]: === Iteration 77 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 19:04:24,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 19:04:24,513 INFO L85 PathProgramCache]: Analyzing trace with hash -1831020510, now seen corresponding path program 72 times [2022-03-20 19:04:24,513 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 19:04:24,513 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1925416962] [2022-03-20 19:04:24,717 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 19:04:24,717 INFO L85 PathProgramCache]: Analyzing trace with hash 1186228216, now seen corresponding path program 1 times [2022-03-20 19:04:24,718 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:04:24,718 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [129203150] [2022-03-20 19:04:24,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:04:24,718 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:04:24,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:04:24,743 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 19:04:24,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:04:24,745 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 19:04:24,745 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 19:04:24,745 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [129203150] [2022-03-20 19:04:24,746 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [129203150] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:04:24,746 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:04:24,746 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 19:04:26,930 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 19:04:26,930 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1925416962] [2022-03-20 19:04:26,931 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1925416962] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:04:26,931 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:04:26,931 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [77] imperfect sequences [] total 77 [2022-03-20 19:04:26,931 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1261851269] [2022-03-20 19:04:26,931 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 19:04:26,931 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 77 states [2022-03-20 19:04:26,931 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 19:04:26,931 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2022-03-20 19:04:26,932 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=224, Invalid=5628, Unknown=0, NotChecked=0, Total=5852 [2022-03-20 19:04:26,932 INFO L87 Difference]: Start difference. First operand 98 states and 101 transitions. Second operand has 77 states, 77 states have (on average 1.103896103896104) internal successors, (85), 76 states have internal predecessors, (85), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 19:04:31,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 19:04:31,278 INFO L93 Difference]: Finished difference Result 195 states and 204 transitions. [2022-03-20 19:04:31,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2022-03-20 19:04:31,279 INFO L78 Accepts]: Start accepts. Automaton has has 77 states, 77 states have (on average 1.103896103896104) internal successors, (85), 76 states have internal predecessors, (85), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 92 [2022-03-20 19:04:31,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 19:04:31,279 INFO L225 Difference]: With dead ends: 195 [2022-03-20 19:04:31,279 INFO L226 Difference]: Without dead ends: 104 [2022-03-20 19:04:31,281 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 149 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2701 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=666, Invalid=21984, Unknown=0, NotChecked=0, Total=22650 [2022-03-20 19:04:31,281 INFO L913 BasicCegarLoop]: 19 mSDtfsCounter, 20 mSDsluCounter, 277 mSDsCounter, 0 mSdLazyCounter, 6472 mSolverCounterSat, 159 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 296 SdHoareTripleChecker+Invalid, 6631 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 159 IncrementalHoareTripleChecker+Valid, 6472 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2022-03-20 19:04:31,281 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 296 Invalid, 6631 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [159 Valid, 6472 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2022-03-20 19:04:31,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2022-03-20 19:04:31,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 99. [2022-03-20 19:04:31,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 90 states have (on average 1.0444444444444445) internal successors, (94), 91 states have internal predecessors, (94), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-20 19:04:31,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 102 transitions. [2022-03-20 19:04:31,355 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 102 transitions. Word has length 92 [2022-03-20 19:04:31,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 19:04:31,355 INFO L478 AbstractCegarLoop]: Abstraction has 99 states and 102 transitions. [2022-03-20 19:04:31,355 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 77 states, 77 states have (on average 1.103896103896104) internal successors, (85), 76 states have internal predecessors, (85), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 19:04:31,356 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 102 transitions. [2022-03-20 19:04:31,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2022-03-20 19:04:31,356 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 19:04:31,356 INFO L499 BasicCegarLoop]: trace histogram [73, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 19:04:31,356 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2022-03-20 19:04:31,356 INFO L403 AbstractCegarLoop]: === Iteration 78 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 19:04:31,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 19:04:31,356 INFO L85 PathProgramCache]: Analyzing trace with hash 25221634, now seen corresponding path program 73 times [2022-03-20 19:04:31,356 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 19:04:31,356 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1927322391] [2022-03-20 19:04:31,533 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 19:04:31,534 INFO L85 PathProgramCache]: Analyzing trace with hash 1245333560, now seen corresponding path program 1 times [2022-03-20 19:04:31,534 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:04:31,534 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [136873511] [2022-03-20 19:04:31,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:04:31,534 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:04:31,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:04:31,560 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 19:04:31,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:04:31,562 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 19:04:31,562 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 19:04:31,562 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [136873511] [2022-03-20 19:04:31,562 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [136873511] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:04:31,562 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:04:31,562 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 19:04:33,787 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 19:04:33,787 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1927322391] [2022-03-20 19:04:33,787 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1927322391] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:04:33,787 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:04:33,788 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [78] imperfect sequences [] total 78 [2022-03-20 19:04:33,788 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [830178873] [2022-03-20 19:04:33,788 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 19:04:33,788 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 78 states [2022-03-20 19:04:33,788 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 19:04:33,788 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2022-03-20 19:04:33,789 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=227, Invalid=5779, Unknown=0, NotChecked=0, Total=6006 [2022-03-20 19:04:33,789 INFO L87 Difference]: Start difference. First operand 99 states and 102 transitions. Second operand has 78 states, 78 states have (on average 1.1025641025641026) internal successors, (86), 77 states have internal predecessors, (86), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 19:04:38,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 19:04:38,391 INFO L93 Difference]: Finished difference Result 197 states and 206 transitions. [2022-03-20 19:04:38,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2022-03-20 19:04:38,391 INFO L78 Accepts]: Start accepts. Automaton has has 78 states, 78 states have (on average 1.1025641025641026) internal successors, (86), 77 states have internal predecessors, (86), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 93 [2022-03-20 19:04:38,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 19:04:38,392 INFO L225 Difference]: With dead ends: 197 [2022-03-20 19:04:38,392 INFO L226 Difference]: Without dead ends: 105 [2022-03-20 19:04:38,393 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 151 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2775 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=675, Invalid=22581, Unknown=0, NotChecked=0, Total=23256 [2022-03-20 19:04:38,393 INFO L913 BasicCegarLoop]: 19 mSDtfsCounter, 20 mSDsluCounter, 367 mSDsCounter, 0 mSdLazyCounter, 6877 mSolverCounterSat, 160 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 386 SdHoareTripleChecker+Invalid, 7037 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 160 IncrementalHoareTripleChecker+Valid, 6877 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-03-20 19:04:38,393 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 386 Invalid, 7037 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [160 Valid, 6877 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2022-03-20 19:04:38,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2022-03-20 19:04:38,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 100. [2022-03-20 19:04:38,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 91 states have (on average 1.043956043956044) internal successors, (95), 92 states have internal predecessors, (95), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-20 19:04:38,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 103 transitions. [2022-03-20 19:04:38,460 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 103 transitions. Word has length 93 [2022-03-20 19:04:38,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 19:04:38,460 INFO L478 AbstractCegarLoop]: Abstraction has 100 states and 103 transitions. [2022-03-20 19:04:38,461 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 78 states, 78 states have (on average 1.1025641025641026) internal successors, (86), 77 states have internal predecessors, (86), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 19:04:38,461 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 103 transitions. [2022-03-20 19:04:38,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2022-03-20 19:04:38,461 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 19:04:38,461 INFO L499 BasicCegarLoop]: trace histogram [74, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 19:04:38,461 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2022-03-20 19:04:38,461 INFO L403 AbstractCegarLoop]: === Iteration 79 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 19:04:38,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 19:04:38,462 INFO L85 PathProgramCache]: Analyzing trace with hash 1734153250, now seen corresponding path program 74 times [2022-03-20 19:04:38,462 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 19:04:38,462 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [745818391] [2022-03-20 19:04:38,669 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 19:04:38,669 INFO L85 PathProgramCache]: Analyzing trace with hash 1304438904, now seen corresponding path program 1 times [2022-03-20 19:04:38,670 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:04:38,670 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1453631700] [2022-03-20 19:04:38,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:04:38,670 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:04:38,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:04:38,699 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 19:04:38,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:04:38,710 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 19:04:38,710 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 19:04:38,710 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1453631700] [2022-03-20 19:04:38,710 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1453631700] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:04:38,710 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:04:38,710 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 19:04:41,030 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 19:04:41,030 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [745818391] [2022-03-20 19:04:41,030 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [745818391] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:04:41,031 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:04:41,031 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [79] imperfect sequences [] total 79 [2022-03-20 19:04:41,031 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [221432625] [2022-03-20 19:04:41,031 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 19:04:41,031 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 79 states [2022-03-20 19:04:41,031 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 19:04:41,031 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 79 interpolants. [2022-03-20 19:04:41,032 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=230, Invalid=5932, Unknown=0, NotChecked=0, Total=6162 [2022-03-20 19:04:41,032 INFO L87 Difference]: Start difference. First operand 100 states and 103 transitions. Second operand has 79 states, 79 states have (on average 1.1012658227848102) internal successors, (87), 78 states have internal predecessors, (87), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 19:04:45,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 19:04:45,426 INFO L93 Difference]: Finished difference Result 199 states and 208 transitions. [2022-03-20 19:04:45,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2022-03-20 19:04:45,426 INFO L78 Accepts]: Start accepts. Automaton has has 79 states, 79 states have (on average 1.1012658227848102) internal successors, (87), 78 states have internal predecessors, (87), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 94 [2022-03-20 19:04:45,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 19:04:45,427 INFO L225 Difference]: With dead ends: 199 [2022-03-20 19:04:45,427 INFO L226 Difference]: Without dead ends: 106 [2022-03-20 19:04:45,428 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 153 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2850 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=684, Invalid=23186, Unknown=0, NotChecked=0, Total=23870 [2022-03-20 19:04:45,428 INFO L913 BasicCegarLoop]: 19 mSDtfsCounter, 20 mSDsluCounter, 192 mSDsCounter, 0 mSdLazyCounter, 6540 mSolverCounterSat, 163 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 211 SdHoareTripleChecker+Invalid, 6703 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 163 IncrementalHoareTripleChecker+Valid, 6540 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2022-03-20 19:04:45,428 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 211 Invalid, 6703 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [163 Valid, 6540 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2022-03-20 19:04:45,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2022-03-20 19:04:45,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 101. [2022-03-20 19:04:45,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 92 states have (on average 1.0434782608695652) internal successors, (96), 93 states have internal predecessors, (96), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-20 19:04:45,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 104 transitions. [2022-03-20 19:04:45,502 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 104 transitions. Word has length 94 [2022-03-20 19:04:45,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 19:04:45,502 INFO L478 AbstractCegarLoop]: Abstraction has 101 states and 104 transitions. [2022-03-20 19:04:45,502 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 79 states, 79 states have (on average 1.1012658227848102) internal successors, (87), 78 states have internal predecessors, (87), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 19:04:45,502 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 104 transitions. [2022-03-20 19:04:45,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2022-03-20 19:04:45,503 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 19:04:45,503 INFO L499 BasicCegarLoop]: trace histogram [75, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 19:04:45,503 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2022-03-20 19:04:45,503 INFO L403 AbstractCegarLoop]: === Iteration 80 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 19:04:45,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 19:04:45,504 INFO L85 PathProgramCache]: Analyzing trace with hash -1123541502, now seen corresponding path program 75 times [2022-03-20 19:04:45,504 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 19:04:45,504 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1846474486] [2022-03-20 19:04:45,730 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 19:04:45,731 INFO L85 PathProgramCache]: Analyzing trace with hash 1363544248, now seen corresponding path program 1 times [2022-03-20 19:04:45,731 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:04:45,731 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [182059182] [2022-03-20 19:04:45,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:04:45,731 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:04:45,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:04:45,767 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 19:04:45,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:04:45,769 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 19:04:45,769 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 19:04:45,769 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [182059182] [2022-03-20 19:04:45,769 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [182059182] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:04:45,769 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:04:45,769 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 19:04:48,216 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 19:04:48,217 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1846474486] [2022-03-20 19:04:48,217 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1846474486] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:04:48,217 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:04:48,217 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [80] imperfect sequences [] total 80 [2022-03-20 19:04:48,217 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [314682914] [2022-03-20 19:04:48,217 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 19:04:48,217 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 80 states [2022-03-20 19:04:48,217 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 19:04:48,217 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2022-03-20 19:04:48,218 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=6087, Unknown=0, NotChecked=0, Total=6320 [2022-03-20 19:04:48,218 INFO L87 Difference]: Start difference. First operand 101 states and 104 transitions. Second operand has 80 states, 80 states have (on average 1.1) internal successors, (88), 79 states have internal predecessors, (88), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 19:04:52,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 19:04:52,608 INFO L93 Difference]: Finished difference Result 201 states and 210 transitions. [2022-03-20 19:04:52,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2022-03-20 19:04:52,608 INFO L78 Accepts]: Start accepts. Automaton has has 80 states, 80 states have (on average 1.1) internal successors, (88), 79 states have internal predecessors, (88), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 95 [2022-03-20 19:04:52,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 19:04:52,609 INFO L225 Difference]: With dead ends: 201 [2022-03-20 19:04:52,609 INFO L226 Difference]: Without dead ends: 107 [2022-03-20 19:04:52,610 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 155 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2926 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=693, Invalid=23799, Unknown=0, NotChecked=0, Total=24492 [2022-03-20 19:04:52,610 INFO L913 BasicCegarLoop]: 19 mSDtfsCounter, 20 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 6374 mSolverCounterSat, 165 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 96 SdHoareTripleChecker+Invalid, 6539 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 165 IncrementalHoareTripleChecker+Valid, 6374 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-03-20 19:04:52,610 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 96 Invalid, 6539 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [165 Valid, 6374 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2022-03-20 19:04:52,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2022-03-20 19:04:52,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 102. [2022-03-20 19:04:52,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 93 states have (on average 1.043010752688172) internal successors, (97), 94 states have internal predecessors, (97), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-20 19:04:52,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 105 transitions. [2022-03-20 19:04:52,689 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 105 transitions. Word has length 95 [2022-03-20 19:04:52,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 19:04:52,689 INFO L478 AbstractCegarLoop]: Abstraction has 102 states and 105 transitions. [2022-03-20 19:04:52,690 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 80 states, 80 states have (on average 1.1) internal successors, (88), 79 states have internal predecessors, (88), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 19:04:52,690 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 105 transitions. [2022-03-20 19:04:52,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2022-03-20 19:04:52,690 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 19:04:52,690 INFO L499 BasicCegarLoop]: trace histogram [76, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 19:04:52,690 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2022-03-20 19:04:52,690 INFO L403 AbstractCegarLoop]: === Iteration 81 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 19:04:52,690 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 19:04:52,690 INFO L85 PathProgramCache]: Analyzing trace with hash 482234402, now seen corresponding path program 76 times [2022-03-20 19:04:52,690 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 19:04:52,690 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [132868179] [2022-03-20 19:04:52,842 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 19:04:52,843 INFO L85 PathProgramCache]: Analyzing trace with hash 1422649592, now seen corresponding path program 1 times [2022-03-20 19:04:52,843 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:04:52,843 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1393538588] [2022-03-20 19:04:52,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:04:52,843 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:04:52,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:04:52,871 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 19:04:52,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:04:52,873 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 19:04:52,873 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 19:04:52,873 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1393538588] [2022-03-20 19:04:52,873 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1393538588] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:04:52,873 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:04:52,873 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 19:04:55,279 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 19:04:55,279 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [132868179] [2022-03-20 19:04:55,279 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [132868179] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:04:55,279 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:04:55,279 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [81] imperfect sequences [] total 81 [2022-03-20 19:04:55,279 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [76384023] [2022-03-20 19:04:55,279 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 19:04:55,279 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 81 states [2022-03-20 19:04:55,280 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 19:04:55,280 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 81 interpolants. [2022-03-20 19:04:55,280 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=236, Invalid=6244, Unknown=0, NotChecked=0, Total=6480 [2022-03-20 19:04:55,280 INFO L87 Difference]: Start difference. First operand 102 states and 105 transitions. Second operand has 81 states, 81 states have (on average 1.0987654320987654) internal successors, (89), 80 states have internal predecessors, (89), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 19:04:59,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 19:04:59,749 INFO L93 Difference]: Finished difference Result 203 states and 212 transitions. [2022-03-20 19:04:59,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2022-03-20 19:04:59,751 INFO L78 Accepts]: Start accepts. Automaton has has 81 states, 81 states have (on average 1.0987654320987654) internal successors, (89), 80 states have internal predecessors, (89), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 96 [2022-03-20 19:04:59,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 19:04:59,752 INFO L225 Difference]: With dead ends: 203 [2022-03-20 19:04:59,752 INFO L226 Difference]: Without dead ends: 108 [2022-03-20 19:04:59,754 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 157 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3003 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=702, Invalid=24420, Unknown=0, NotChecked=0, Total=25122 [2022-03-20 19:04:59,754 INFO L913 BasicCegarLoop]: 19 mSDtfsCounter, 20 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 6504 mSolverCounterSat, 167 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 86 SdHoareTripleChecker+Invalid, 6671 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 167 IncrementalHoareTripleChecker+Valid, 6504 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-03-20 19:04:59,754 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 86 Invalid, 6671 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [167 Valid, 6504 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2022-03-20 19:04:59,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2022-03-20 19:04:59,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 103. [2022-03-20 19:04:59,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 94 states have (on average 1.0425531914893618) internal successors, (98), 95 states have internal predecessors, (98), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-20 19:04:59,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 106 transitions. [2022-03-20 19:04:59,834 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 106 transitions. Word has length 96 [2022-03-20 19:04:59,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 19:04:59,834 INFO L478 AbstractCegarLoop]: Abstraction has 103 states and 106 transitions. [2022-03-20 19:04:59,834 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 81 states, 81 states have (on average 1.0987654320987654) internal successors, (89), 80 states have internal predecessors, (89), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 19:04:59,834 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 106 transitions. [2022-03-20 19:04:59,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2022-03-20 19:04:59,834 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 19:04:59,835 INFO L499 BasicCegarLoop]: trace histogram [77, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 19:04:59,835 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2022-03-20 19:04:59,835 INFO L403 AbstractCegarLoop]: === Iteration 82 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 19:04:59,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 19:04:59,835 INFO L85 PathProgramCache]: Analyzing trace with hash -1278320126, now seen corresponding path program 77 times [2022-03-20 19:04:59,835 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 19:04:59,835 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [17649201] [2022-03-20 19:05:00,043 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 19:05:00,044 INFO L85 PathProgramCache]: Analyzing trace with hash 1481754936, now seen corresponding path program 1 times [2022-03-20 19:05:00,044 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:05:00,044 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1613066272] [2022-03-20 19:05:00,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:05:00,044 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:05:00,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:05:00,087 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 19:05:00,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:05:00,090 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 19:05:00,090 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 19:05:00,090 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1613066272] [2022-03-20 19:05:00,090 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1613066272] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:05:00,090 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:05:00,090 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 19:05:02,606 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 19:05:02,606 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [17649201] [2022-03-20 19:05:02,606 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [17649201] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:05:02,606 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:05:02,606 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [82] imperfect sequences [] total 82 [2022-03-20 19:05:02,606 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [329080975] [2022-03-20 19:05:02,606 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 19:05:02,606 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 82 states [2022-03-20 19:05:02,607 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 19:05:02,607 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2022-03-20 19:05:02,607 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=239, Invalid=6403, Unknown=0, NotChecked=0, Total=6642 [2022-03-20 19:05:02,607 INFO L87 Difference]: Start difference. First operand 103 states and 106 transitions. Second operand has 82 states, 82 states have (on average 1.0975609756097562) internal successors, (90), 81 states have internal predecessors, (90), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 19:05:07,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 19:05:07,448 INFO L93 Difference]: Finished difference Result 205 states and 214 transitions. [2022-03-20 19:05:07,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2022-03-20 19:05:07,448 INFO L78 Accepts]: Start accepts. Automaton has has 82 states, 82 states have (on average 1.0975609756097562) internal successors, (90), 81 states have internal predecessors, (90), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 97 [2022-03-20 19:05:07,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 19:05:07,449 INFO L225 Difference]: With dead ends: 205 [2022-03-20 19:05:07,449 INFO L226 Difference]: Without dead ends: 109 [2022-03-20 19:05:07,450 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 159 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3081 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=711, Invalid=25049, Unknown=0, NotChecked=0, Total=25760 [2022-03-20 19:05:07,450 INFO L913 BasicCegarLoop]: 19 mSDtfsCounter, 20 mSDsluCounter, 257 mSDsCounter, 0 mSdLazyCounter, 7197 mSolverCounterSat, 168 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 276 SdHoareTripleChecker+Invalid, 7365 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 168 IncrementalHoareTripleChecker+Valid, 7197 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-03-20 19:05:07,450 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 276 Invalid, 7365 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [168 Valid, 7197 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2022-03-20 19:05:07,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2022-03-20 19:05:07,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 104. [2022-03-20 19:05:07,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 95 states have (on average 1.0421052631578946) internal successors, (99), 96 states have internal predecessors, (99), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-20 19:05:07,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 107 transitions. [2022-03-20 19:05:07,524 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 107 transitions. Word has length 97 [2022-03-20 19:05:07,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 19:05:07,524 INFO L478 AbstractCegarLoop]: Abstraction has 104 states and 107 transitions. [2022-03-20 19:05:07,525 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 82 states, 82 states have (on average 1.0975609756097562) internal successors, (90), 81 states have internal predecessors, (90), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 19:05:07,525 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 107 transitions. [2022-03-20 19:05:07,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2022-03-20 19:05:07,525 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 19:05:07,525 INFO L499 BasicCegarLoop]: trace histogram [78, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 19:05:07,525 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2022-03-20 19:05:07,525 INFO L403 AbstractCegarLoop]: === Iteration 83 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 19:05:07,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 19:05:07,525 INFO L85 PathProgramCache]: Analyzing trace with hash -20935646, now seen corresponding path program 78 times [2022-03-20 19:05:07,525 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 19:05:07,525 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [568163532] [2022-03-20 19:05:07,672 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 19:05:07,673 INFO L85 PathProgramCache]: Analyzing trace with hash 1540860280, now seen corresponding path program 1 times [2022-03-20 19:05:07,673 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:05:07,673 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [960373984] [2022-03-20 19:05:07,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:05:07,673 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:05:07,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:05:07,707 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 19:05:07,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:05:07,710 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 19:05:07,710 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 19:05:07,710 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [960373984] [2022-03-20 19:05:07,710 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [960373984] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:05:07,710 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:05:07,710 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 19:05:10,235 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 19:05:10,235 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [568163532] [2022-03-20 19:05:10,236 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [568163532] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:05:10,236 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:05:10,236 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [83] imperfect sequences [] total 83 [2022-03-20 19:05:10,236 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [742581536] [2022-03-20 19:05:10,236 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 19:05:10,236 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 83 states [2022-03-20 19:05:10,236 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 19:05:10,236 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2022-03-20 19:05:10,237 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=242, Invalid=6564, Unknown=0, NotChecked=0, Total=6806 [2022-03-20 19:05:10,237 INFO L87 Difference]: Start difference. First operand 104 states and 107 transitions. Second operand has 83 states, 83 states have (on average 1.0963855421686748) internal successors, (91), 82 states have internal predecessors, (91), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 19:05:15,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 19:05:15,311 INFO L93 Difference]: Finished difference Result 207 states and 216 transitions. [2022-03-20 19:05:15,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2022-03-20 19:05:15,312 INFO L78 Accepts]: Start accepts. Automaton has has 83 states, 83 states have (on average 1.0963855421686748) internal successors, (91), 82 states have internal predecessors, (91), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 98 [2022-03-20 19:05:15,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 19:05:15,312 INFO L225 Difference]: With dead ends: 207 [2022-03-20 19:05:15,312 INFO L226 Difference]: Without dead ends: 110 [2022-03-20 19:05:15,313 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 161 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3160 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=720, Invalid=25686, Unknown=0, NotChecked=0, Total=26406 [2022-03-20 19:05:15,314 INFO L913 BasicCegarLoop]: 19 mSDtfsCounter, 20 mSDsluCounter, 387 mSDsCounter, 0 mSdLazyCounter, 7722 mSolverCounterSat, 171 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 406 SdHoareTripleChecker+Invalid, 7893 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 171 IncrementalHoareTripleChecker+Valid, 7722 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2022-03-20 19:05:15,314 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 406 Invalid, 7893 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [171 Valid, 7722 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2022-03-20 19:05:15,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2022-03-20 19:05:15,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 105. [2022-03-20 19:05:15,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 96 states have (on average 1.0416666666666667) internal successors, (100), 97 states have internal predecessors, (100), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-20 19:05:15,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 108 transitions. [2022-03-20 19:05:15,393 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 108 transitions. Word has length 98 [2022-03-20 19:05:15,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 19:05:15,393 INFO L478 AbstractCegarLoop]: Abstraction has 105 states and 108 transitions. [2022-03-20 19:05:15,393 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 83 states, 83 states have (on average 1.0963855421686748) internal successors, (91), 82 states have internal predecessors, (91), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 19:05:15,393 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 108 transitions. [2022-03-20 19:05:15,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2022-03-20 19:05:15,394 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 19:05:15,394 INFO L499 BasicCegarLoop]: trace histogram [79, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 19:05:15,394 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2022-03-20 19:05:15,394 INFO L403 AbstractCegarLoop]: === Iteration 84 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 19:05:15,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 19:05:15,394 INFO L85 PathProgramCache]: Analyzing trace with hash 303277570, now seen corresponding path program 79 times [2022-03-20 19:05:15,394 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 19:05:15,395 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [138383326] [2022-03-20 19:05:15,557 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 19:05:15,558 INFO L85 PathProgramCache]: Analyzing trace with hash 1599965624, now seen corresponding path program 1 times [2022-03-20 19:05:15,558 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:05:15,558 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [724676865] [2022-03-20 19:05:15,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:05:15,558 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:05:15,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:05:15,581 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 19:05:15,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:05:15,592 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 19:05:15,592 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 19:05:15,592 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [724676865] [2022-03-20 19:05:15,592 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [724676865] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:05:15,592 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:05:15,593 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 19:05:18,123 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 19:05:18,124 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [138383326] [2022-03-20 19:05:18,124 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [138383326] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:05:18,124 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:05:18,124 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [84] imperfect sequences [] total 84 [2022-03-20 19:05:18,124 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [517405160] [2022-03-20 19:05:18,124 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 19:05:18,124 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 84 states [2022-03-20 19:05:18,124 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 19:05:18,124 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2022-03-20 19:05:18,125 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=245, Invalid=6727, Unknown=0, NotChecked=0, Total=6972 [2022-03-20 19:05:18,125 INFO L87 Difference]: Start difference. First operand 105 states and 108 transitions. Second operand has 84 states, 84 states have (on average 1.0952380952380953) internal successors, (92), 83 states have internal predecessors, (92), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 19:05:22,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 19:05:22,964 INFO L93 Difference]: Finished difference Result 209 states and 218 transitions. [2022-03-20 19:05:22,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2022-03-20 19:05:22,964 INFO L78 Accepts]: Start accepts. Automaton has has 84 states, 84 states have (on average 1.0952380952380953) internal successors, (92), 83 states have internal predecessors, (92), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 99 [2022-03-20 19:05:22,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 19:05:22,965 INFO L225 Difference]: With dead ends: 209 [2022-03-20 19:05:22,965 INFO L226 Difference]: Without dead ends: 111 [2022-03-20 19:05:22,966 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 163 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3240 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=729, Invalid=26331, Unknown=0, NotChecked=0, Total=27060 [2022-03-20 19:05:22,966 INFO L913 BasicCegarLoop]: 19 mSDtfsCounter, 20 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 6948 mSolverCounterSat, 173 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 71 SdHoareTripleChecker+Invalid, 7121 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 173 IncrementalHoareTripleChecker+Valid, 6948 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-03-20 19:05:22,966 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 71 Invalid, 7121 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [173 Valid, 6948 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2022-03-20 19:05:22,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2022-03-20 19:05:23,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 106. [2022-03-20 19:05:23,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 97 states have (on average 1.041237113402062) internal successors, (101), 98 states have internal predecessors, (101), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-20 19:05:23,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 109 transitions. [2022-03-20 19:05:23,051 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 109 transitions. Word has length 99 [2022-03-20 19:05:23,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 19:05:23,052 INFO L478 AbstractCegarLoop]: Abstraction has 106 states and 109 transitions. [2022-03-20 19:05:23,052 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 84 states, 84 states have (on average 1.0952380952380953) internal successors, (92), 83 states have internal predecessors, (92), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 19:05:23,052 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 109 transitions. [2022-03-20 19:05:23,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2022-03-20 19:05:23,052 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 19:05:23,052 INFO L499 BasicCegarLoop]: trace histogram [80, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 19:05:23,052 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83 [2022-03-20 19:05:23,053 INFO L403 AbstractCegarLoop]: === Iteration 85 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 19:05:23,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 19:05:23,053 INFO L85 PathProgramCache]: Analyzing trace with hash 1763952674, now seen corresponding path program 80 times [2022-03-20 19:05:23,053 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 19:05:23,053 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1021769926] [2022-03-20 19:05:23,285 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 19:05:23,285 INFO L85 PathProgramCache]: Analyzing trace with hash 1659070968, now seen corresponding path program 1 times [2022-03-20 19:05:23,285 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:05:23,285 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1379206829] [2022-03-20 19:05:23,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:05:23,286 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:05:23,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:05:23,314 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 19:05:23,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:05:23,317 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 19:05:23,317 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 19:05:23,317 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1379206829] [2022-03-20 19:05:23,317 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1379206829] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:05:23,317 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:05:23,317 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 19:05:25,953 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 19:05:25,953 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1021769926] [2022-03-20 19:05:25,953 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1021769926] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:05:25,953 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:05:25,953 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [85] imperfect sequences [] total 85 [2022-03-20 19:05:25,953 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [703968186] [2022-03-20 19:05:25,953 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 19:05:25,953 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 85 states [2022-03-20 19:05:25,953 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 19:05:25,954 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 85 interpolants. [2022-03-20 19:05:25,954 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=248, Invalid=6892, Unknown=0, NotChecked=0, Total=7140 [2022-03-20 19:05:25,954 INFO L87 Difference]: Start difference. First operand 106 states and 109 transitions. Second operand has 85 states, 85 states have (on average 1.0941176470588236) internal successors, (93), 84 states have internal predecessors, (93), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 19:05:30,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 19:05:30,876 INFO L93 Difference]: Finished difference Result 211 states and 220 transitions. [2022-03-20 19:05:30,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2022-03-20 19:05:30,876 INFO L78 Accepts]: Start accepts. Automaton has has 85 states, 85 states have (on average 1.0941176470588236) internal successors, (93), 84 states have internal predecessors, (93), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 100 [2022-03-20 19:05:30,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 19:05:30,877 INFO L225 Difference]: With dead ends: 211 [2022-03-20 19:05:30,877 INFO L226 Difference]: Without dead ends: 112 [2022-03-20 19:05:30,878 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 165 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3321 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=738, Invalid=26984, Unknown=0, NotChecked=0, Total=27722 [2022-03-20 19:05:30,879 INFO L913 BasicCegarLoop]: 19 mSDtfsCounter, 20 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 7058 mSolverCounterSat, 175 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 7233 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 175 IncrementalHoareTripleChecker+Valid, 7058 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-03-20 19:05:30,879 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 51 Invalid, 7233 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [175 Valid, 7058 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2022-03-20 19:05:30,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2022-03-20 19:05:30,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 107. [2022-03-20 19:05:30,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 98 states have (on average 1.0408163265306123) internal successors, (102), 99 states have internal predecessors, (102), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-20 19:05:30,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 110 transitions. [2022-03-20 19:05:30,966 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 110 transitions. Word has length 100 [2022-03-20 19:05:30,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 19:05:30,966 INFO L478 AbstractCegarLoop]: Abstraction has 107 states and 110 transitions. [2022-03-20 19:05:30,967 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 85 states, 85 states have (on average 1.0941176470588236) internal successors, (93), 84 states have internal predecessors, (93), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 19:05:30,967 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 110 transitions. [2022-03-20 19:05:30,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2022-03-20 19:05:30,967 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 19:05:30,967 INFO L499 BasicCegarLoop]: trace histogram [81, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 19:05:30,967 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84 [2022-03-20 19:05:30,968 INFO L403 AbstractCegarLoop]: === Iteration 86 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 19:05:30,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 19:05:30,968 INFO L85 PathProgramCache]: Analyzing trace with hash -199759358, now seen corresponding path program 81 times [2022-03-20 19:05:30,968 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 19:05:30,968 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [820888413] [2022-03-20 19:05:31,121 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 19:05:31,121 INFO L85 PathProgramCache]: Analyzing trace with hash 1718176312, now seen corresponding path program 1 times [2022-03-20 19:05:31,121 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:05:31,121 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [315363300] [2022-03-20 19:05:31,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:05:31,122 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:05:31,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:05:31,151 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 19:05:31,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:05:31,153 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 19:05:31,153 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 19:05:31,153 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [315363300] [2022-03-20 19:05:31,153 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [315363300] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:05:31,153 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:05:31,153 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 19:05:33,843 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 19:05:33,843 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [820888413] [2022-03-20 19:05:33,844 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [820888413] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:05:33,844 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:05:33,844 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [86] imperfect sequences [] total 86 [2022-03-20 19:05:33,844 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [973807652] [2022-03-20 19:05:33,844 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 19:05:33,844 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 86 states [2022-03-20 19:05:33,844 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 19:05:33,844 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2022-03-20 19:05:33,845 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=251, Invalid=7059, Unknown=0, NotChecked=0, Total=7310 [2022-03-20 19:05:33,845 INFO L87 Difference]: Start difference. First operand 107 states and 110 transitions. Second operand has 86 states, 86 states have (on average 1.0930232558139534) internal successors, (94), 85 states have internal predecessors, (94), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 19:05:39,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 19:05:39,327 INFO L93 Difference]: Finished difference Result 213 states and 222 transitions. [2022-03-20 19:05:39,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2022-03-20 19:05:39,327 INFO L78 Accepts]: Start accepts. Automaton has has 86 states, 86 states have (on average 1.0930232558139534) internal successors, (94), 85 states have internal predecessors, (94), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 101 [2022-03-20 19:05:39,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 19:05:39,328 INFO L225 Difference]: With dead ends: 213 [2022-03-20 19:05:39,328 INFO L226 Difference]: Without dead ends: 113 [2022-03-20 19:05:39,329 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 167 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3403 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=747, Invalid=27645, Unknown=0, NotChecked=0, Total=28392 [2022-03-20 19:05:39,330 INFO L913 BasicCegarLoop]: 19 mSDtfsCounter, 20 mSDsluCounter, 347 mSDsCounter, 0 mSdLazyCounter, 8109 mSolverCounterSat, 176 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 366 SdHoareTripleChecker+Invalid, 8285 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 176 IncrementalHoareTripleChecker+Valid, 8109 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2022-03-20 19:05:39,330 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 366 Invalid, 8285 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [176 Valid, 8109 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2022-03-20 19:05:39,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2022-03-20 19:05:39,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 108. [2022-03-20 19:05:39,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 99 states have (on average 1.0404040404040404) internal successors, (103), 100 states have internal predecessors, (103), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-20 19:05:39,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 111 transitions. [2022-03-20 19:05:39,429 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 111 transitions. Word has length 101 [2022-03-20 19:05:39,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 19:05:39,429 INFO L478 AbstractCegarLoop]: Abstraction has 108 states and 111 transitions. [2022-03-20 19:05:39,429 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 86 states, 86 states have (on average 1.0930232558139534) internal successors, (94), 85 states have internal predecessors, (94), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 19:05:39,429 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 111 transitions. [2022-03-20 19:05:39,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-03-20 19:05:39,430 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 19:05:39,430 INFO L499 BasicCegarLoop]: trace histogram [82, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 19:05:39,430 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85 [2022-03-20 19:05:39,430 INFO L403 AbstractCegarLoop]: === Iteration 87 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 19:05:39,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 19:05:39,430 INFO L85 PathProgramCache]: Analyzing trace with hash -945290206, now seen corresponding path program 82 times [2022-03-20 19:05:39,430 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 19:05:39,430 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1318510708] [2022-03-20 19:05:39,626 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 19:05:39,626 INFO L85 PathProgramCache]: Analyzing trace with hash 1777281656, now seen corresponding path program 1 times [2022-03-20 19:05:39,627 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:05:39,627 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [873150514] [2022-03-20 19:05:39,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:05:39,627 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:05:39,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:05:39,654 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 19:05:39,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:05:39,657 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 19:05:39,657 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 19:05:39,657 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [873150514] [2022-03-20 19:05:39,657 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [873150514] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:05:39,657 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:05:39,657 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 19:05:42,499 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 19:05:42,499 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1318510708] [2022-03-20 19:05:42,499 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1318510708] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:05:42,499 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:05:42,499 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [87] imperfect sequences [] total 87 [2022-03-20 19:05:42,499 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [375858143] [2022-03-20 19:05:42,499 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 19:05:42,499 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 87 states [2022-03-20 19:05:42,500 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 19:05:42,500 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 87 interpolants. [2022-03-20 19:05:42,500 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=254, Invalid=7228, Unknown=0, NotChecked=0, Total=7482 [2022-03-20 19:05:42,500 INFO L87 Difference]: Start difference. First operand 108 states and 111 transitions. Second operand has 87 states, 87 states have (on average 1.0919540229885059) internal successors, (95), 86 states have internal predecessors, (95), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 19:05:47,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 19:05:47,796 INFO L93 Difference]: Finished difference Result 215 states and 224 transitions. [2022-03-20 19:05:47,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2022-03-20 19:05:47,796 INFO L78 Accepts]: Start accepts. Automaton has has 87 states, 87 states have (on average 1.0919540229885059) internal successors, (95), 86 states have internal predecessors, (95), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 102 [2022-03-20 19:05:47,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 19:05:47,797 INFO L225 Difference]: With dead ends: 215 [2022-03-20 19:05:47,797 INFO L226 Difference]: Without dead ends: 114 [2022-03-20 19:05:47,798 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 169 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3486 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=756, Invalid=28314, Unknown=0, NotChecked=0, Total=29070 [2022-03-20 19:05:47,798 INFO L913 BasicCegarLoop]: 19 mSDtfsCounter, 20 mSDsluCounter, 167 mSDsCounter, 0 mSdLazyCounter, 7775 mSolverCounterSat, 178 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 186 SdHoareTripleChecker+Invalid, 7953 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 178 IncrementalHoareTripleChecker+Valid, 7775 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2022-03-20 19:05:47,798 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 186 Invalid, 7953 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [178 Valid, 7775 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2022-03-20 19:05:47,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2022-03-20 19:05:47,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 109. [2022-03-20 19:05:47,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 100 states have (on average 1.04) internal successors, (104), 101 states have internal predecessors, (104), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-20 19:05:47,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 112 transitions. [2022-03-20 19:05:47,882 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 112 transitions. Word has length 102 [2022-03-20 19:05:47,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 19:05:47,883 INFO L478 AbstractCegarLoop]: Abstraction has 109 states and 112 transitions. [2022-03-20 19:05:47,883 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 87 states, 87 states have (on average 1.0919540229885059) internal successors, (95), 86 states have internal predecessors, (95), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 19:05:47,883 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 112 transitions. [2022-03-20 19:05:47,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2022-03-20 19:05:47,883 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 19:05:47,883 INFO L499 BasicCegarLoop]: trace histogram [83, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 19:05:47,883 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86 [2022-03-20 19:05:47,883 INFO L403 AbstractCegarLoop]: === Iteration 88 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 19:05:47,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 19:05:47,884 INFO L85 PathProgramCache]: Analyzing trace with hash 1713057282, now seen corresponding path program 83 times [2022-03-20 19:05:47,884 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 19:05:47,884 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [360961083] [2022-03-20 19:05:48,043 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 19:05:48,044 INFO L85 PathProgramCache]: Analyzing trace with hash 1836387000, now seen corresponding path program 1 times [2022-03-20 19:05:48,044 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:05:48,044 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [737475017] [2022-03-20 19:05:48,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:05:48,044 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:05:48,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:05:48,065 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 19:05:48,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:05:48,066 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 19:05:48,067 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 19:05:48,067 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [737475017] [2022-03-20 19:05:48,067 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [737475017] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:05:48,067 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:05:48,067 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 19:05:50,881 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 19:05:50,881 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [360961083] [2022-03-20 19:05:50,881 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [360961083] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:05:50,881 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:05:50,882 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [88] imperfect sequences [] total 88 [2022-03-20 19:05:50,882 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1073650561] [2022-03-20 19:05:50,882 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 19:05:50,882 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 88 states [2022-03-20 19:05:50,882 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 19:05:50,882 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 88 interpolants. [2022-03-20 19:05:50,883 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=257, Invalid=7399, Unknown=0, NotChecked=0, Total=7656 [2022-03-20 19:05:50,883 INFO L87 Difference]: Start difference. First operand 109 states and 112 transitions. Second operand has 88 states, 88 states have (on average 1.0909090909090908) internal successors, (96), 87 states have internal predecessors, (96), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 19:05:56,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 19:05:56,350 INFO L93 Difference]: Finished difference Result 217 states and 226 transitions. [2022-03-20 19:05:56,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2022-03-20 19:05:56,351 INFO L78 Accepts]: Start accepts. Automaton has has 88 states, 88 states have (on average 1.0909090909090908) internal successors, (96), 87 states have internal predecessors, (96), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 103 [2022-03-20 19:05:56,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 19:05:56,351 INFO L225 Difference]: With dead ends: 217 [2022-03-20 19:05:56,351 INFO L226 Difference]: Without dead ends: 115 [2022-03-20 19:05:56,354 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 190 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 171 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3570 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=765, Invalid=28991, Unknown=0, NotChecked=0, Total=29756 [2022-03-20 19:05:56,354 INFO L913 BasicCegarLoop]: 19 mSDtfsCounter, 20 mSDsluCounter, 197 mSDsCounter, 0 mSdLazyCounter, 8030 mSolverCounterSat, 181 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 216 SdHoareTripleChecker+Invalid, 8211 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 181 IncrementalHoareTripleChecker+Valid, 8030 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2022-03-20 19:05:56,354 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 216 Invalid, 8211 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [181 Valid, 8030 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2022-03-20 19:05:56,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2022-03-20 19:05:56,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 110. [2022-03-20 19:05:56,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 101 states have (on average 1.0396039603960396) internal successors, (105), 102 states have internal predecessors, (105), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-20 19:05:56,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 113 transitions. [2022-03-20 19:05:56,450 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 113 transitions. Word has length 103 [2022-03-20 19:05:56,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 19:05:56,450 INFO L478 AbstractCegarLoop]: Abstraction has 110 states and 113 transitions. [2022-03-20 19:05:56,450 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 88 states, 88 states have (on average 1.0909090909090908) internal successors, (96), 87 states have internal predecessors, (96), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 19:05:56,450 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 113 transitions. [2022-03-20 19:05:56,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2022-03-20 19:05:56,451 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 19:05:56,451 INFO L499 BasicCegarLoop]: trace histogram [84, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 19:05:56,451 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87 [2022-03-20 19:05:56,451 INFO L403 AbstractCegarLoop]: === Iteration 89 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 19:05:56,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 19:05:56,451 INFO L85 PathProgramCache]: Analyzing trace with hash -1777516510, now seen corresponding path program 84 times [2022-03-20 19:05:56,451 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 19:05:56,451 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [297211744] [2022-03-20 19:05:56,710 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 19:05:56,711 INFO L85 PathProgramCache]: Analyzing trace with hash 1895492344, now seen corresponding path program 1 times [2022-03-20 19:05:56,711 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:05:56,711 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1797347916] [2022-03-20 19:05:56,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:05:56,711 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:05:56,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:05:56,743 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 19:05:56,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:05:56,745 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 19:05:56,745 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 19:05:56,745 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1797347916] [2022-03-20 19:05:56,745 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1797347916] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:05:56,745 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:05:56,745 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 19:05:59,638 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 19:05:59,638 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [297211744] [2022-03-20 19:05:59,638 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [297211744] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:05:59,638 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:05:59,638 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [89] imperfect sequences [] total 89 [2022-03-20 19:05:59,638 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [427879011] [2022-03-20 19:05:59,638 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 19:05:59,638 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 89 states [2022-03-20 19:05:59,638 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 19:05:59,639 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 89 interpolants. [2022-03-20 19:05:59,639 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=260, Invalid=7572, Unknown=0, NotChecked=0, Total=7832 [2022-03-20 19:05:59,639 INFO L87 Difference]: Start difference. First operand 110 states and 113 transitions. Second operand has 89 states, 89 states have (on average 1.0898876404494382) internal successors, (97), 88 states have internal predecessors, (97), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 19:06:05,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 19:06:05,157 INFO L93 Difference]: Finished difference Result 219 states and 228 transitions. [2022-03-20 19:06:05,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2022-03-20 19:06:05,158 INFO L78 Accepts]: Start accepts. Automaton has has 89 states, 89 states have (on average 1.0898876404494382) internal successors, (97), 88 states have internal predecessors, (97), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 104 [2022-03-20 19:06:05,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 19:06:05,158 INFO L225 Difference]: With dead ends: 219 [2022-03-20 19:06:05,158 INFO L226 Difference]: Without dead ends: 116 [2022-03-20 19:06:05,159 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 173 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3655 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=774, Invalid=29676, Unknown=0, NotChecked=0, Total=30450 [2022-03-20 19:06:05,159 INFO L913 BasicCegarLoop]: 19 mSDtfsCounter, 20 mSDsluCounter, 157 mSDsCounter, 0 mSdLazyCounter, 8092 mSolverCounterSat, 183 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 176 SdHoareTripleChecker+Invalid, 8275 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 183 IncrementalHoareTripleChecker+Valid, 8092 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2022-03-20 19:06:05,160 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 176 Invalid, 8275 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [183 Valid, 8092 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2022-03-20 19:06:05,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2022-03-20 19:06:05,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 111. [2022-03-20 19:06:05,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 102 states have (on average 1.0392156862745099) internal successors, (106), 103 states have internal predecessors, (106), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-20 19:06:05,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 114 transitions. [2022-03-20 19:06:05,256 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 114 transitions. Word has length 104 [2022-03-20 19:06:05,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 19:06:05,256 INFO L478 AbstractCegarLoop]: Abstraction has 111 states and 114 transitions. [2022-03-20 19:06:05,257 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 89 states, 89 states have (on average 1.0898876404494382) internal successors, (97), 88 states have internal predecessors, (97), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 19:06:05,257 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 114 transitions. [2022-03-20 19:06:05,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2022-03-20 19:06:05,257 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 19:06:05,257 INFO L499 BasicCegarLoop]: trace histogram [85, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 19:06:05,257 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88 [2022-03-20 19:06:05,257 INFO L403 AbstractCegarLoop]: === Iteration 90 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 19:06:05,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 19:06:05,257 INFO L85 PathProgramCache]: Analyzing trace with hash 1683845634, now seen corresponding path program 85 times [2022-03-20 19:06:05,257 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 19:06:05,257 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1145094029] [2022-03-20 19:06:05,506 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 19:06:05,507 INFO L85 PathProgramCache]: Analyzing trace with hash 1954597688, now seen corresponding path program 1 times [2022-03-20 19:06:05,507 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:06:05,507 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1588050558] [2022-03-20 19:06:05,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:06:05,507 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:06:05,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:06:05,543 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 19:06:05,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:06:05,545 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 19:06:05,545 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 19:06:05,545 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1588050558] [2022-03-20 19:06:05,545 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1588050558] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:06:05,545 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:06:05,545 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 19:06:08,607 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 19:06:08,607 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1145094029] [2022-03-20 19:06:08,607 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1145094029] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:06:08,607 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:06:08,607 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [90] imperfect sequences [] total 90 [2022-03-20 19:06:08,607 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1620351408] [2022-03-20 19:06:08,607 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 19:06:08,608 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 90 states [2022-03-20 19:06:08,608 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 19:06:08,608 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 90 interpolants. [2022-03-20 19:06:08,608 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=263, Invalid=7747, Unknown=0, NotChecked=0, Total=8010 [2022-03-20 19:06:08,608 INFO L87 Difference]: Start difference. First operand 111 states and 114 transitions. Second operand has 90 states, 90 states have (on average 1.0888888888888888) internal successors, (98), 89 states have internal predecessors, (98), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 19:06:14,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 19:06:14,565 INFO L93 Difference]: Finished difference Result 221 states and 230 transitions. [2022-03-20 19:06:14,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2022-03-20 19:06:14,566 INFO L78 Accepts]: Start accepts. Automaton has has 90 states, 90 states have (on average 1.0888888888888888) internal successors, (98), 89 states have internal predecessors, (98), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 105 [2022-03-20 19:06:14,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 19:06:14,566 INFO L225 Difference]: With dead ends: 221 [2022-03-20 19:06:14,566 INFO L226 Difference]: Without dead ends: 117 [2022-03-20 19:06:14,568 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 175 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3741 ImplicationChecksByTransitivity, 5.8s TimeCoverageRelationStatistics Valid=783, Invalid=30369, Unknown=0, NotChecked=0, Total=31152 [2022-03-20 19:06:14,568 INFO L913 BasicCegarLoop]: 19 mSDtfsCounter, 20 mSDsluCounter, 387 mSDsCounter, 0 mSdLazyCounter, 8913 mSolverCounterSat, 184 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 406 SdHoareTripleChecker+Invalid, 9097 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 184 IncrementalHoareTripleChecker+Valid, 8913 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2022-03-20 19:06:14,568 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 406 Invalid, 9097 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [184 Valid, 8913 Invalid, 0 Unknown, 0 Unchecked, 2.9s Time] [2022-03-20 19:06:14,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2022-03-20 19:06:14,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 112. [2022-03-20 19:06:14,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 103 states have (on average 1.0388349514563107) internal successors, (107), 104 states have internal predecessors, (107), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-20 19:06:14,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 115 transitions. [2022-03-20 19:06:14,710 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 115 transitions. Word has length 105 [2022-03-20 19:06:14,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 19:06:14,710 INFO L478 AbstractCegarLoop]: Abstraction has 112 states and 115 transitions. [2022-03-20 19:06:14,710 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 90 states, 90 states have (on average 1.0888888888888888) internal successors, (98), 89 states have internal predecessors, (98), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 19:06:14,711 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 115 transitions. [2022-03-20 19:06:14,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2022-03-20 19:06:14,711 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 19:06:14,711 INFO L499 BasicCegarLoop]: trace histogram [86, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 19:06:14,711 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89 [2022-03-20 19:06:14,711 INFO L403 AbstractCegarLoop]: === Iteration 91 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 19:06:14,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 19:06:14,712 INFO L85 PathProgramCache]: Analyzing trace with hash 1611889698, now seen corresponding path program 86 times [2022-03-20 19:06:14,712 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 19:06:14,712 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1901624939] [2022-03-20 19:06:14,995 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 19:06:14,996 INFO L85 PathProgramCache]: Analyzing trace with hash 2013703032, now seen corresponding path program 1 times [2022-03-20 19:06:14,996 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:06:14,996 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2018581998] [2022-03-20 19:06:14,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:06:14,996 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:06:15,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:06:15,035 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 19:06:15,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:06:15,037 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 19:06:15,037 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 19:06:15,037 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2018581998] [2022-03-20 19:06:15,037 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2018581998] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:06:15,037 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:06:15,038 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 19:06:18,086 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 19:06:18,086 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1901624939] [2022-03-20 19:06:18,086 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1901624939] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:06:18,086 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:06:18,086 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [91] imperfect sequences [] total 91 [2022-03-20 19:06:18,086 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [446558898] [2022-03-20 19:06:18,086 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 19:06:18,086 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 91 states [2022-03-20 19:06:18,086 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 19:06:18,087 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 91 interpolants. [2022-03-20 19:06:18,087 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=266, Invalid=7924, Unknown=0, NotChecked=0, Total=8190 [2022-03-20 19:06:18,087 INFO L87 Difference]: Start difference. First operand 112 states and 115 transitions. Second operand has 91 states, 91 states have (on average 1.0879120879120878) internal successors, (99), 90 states have internal predecessors, (99), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 19:06:23,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 19:06:23,922 INFO L93 Difference]: Finished difference Result 223 states and 232 transitions. [2022-03-20 19:06:23,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2022-03-20 19:06:23,922 INFO L78 Accepts]: Start accepts. Automaton has has 91 states, 91 states have (on average 1.0879120879120878) internal successors, (99), 90 states have internal predecessors, (99), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 106 [2022-03-20 19:06:23,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 19:06:23,923 INFO L225 Difference]: With dead ends: 223 [2022-03-20 19:06:23,923 INFO L226 Difference]: Without dead ends: 118 [2022-03-20 19:06:23,938 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 177 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3828 ImplicationChecksByTransitivity, 5.8s TimeCoverageRelationStatistics Valid=792, Invalid=31070, Unknown=0, NotChecked=0, Total=31862 [2022-03-20 19:06:23,938 INFO L913 BasicCegarLoop]: 19 mSDtfsCounter, 20 mSDsluCounter, 157 mSDsCounter, 0 mSdLazyCounter, 8447 mSolverCounterSat, 186 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 176 SdHoareTripleChecker+Invalid, 8633 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 186 IncrementalHoareTripleChecker+Valid, 8447 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2022-03-20 19:06:23,938 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 176 Invalid, 8633 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [186 Valid, 8447 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2022-03-20 19:06:23,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2022-03-20 19:06:24,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 113. [2022-03-20 19:06:24,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 104 states have (on average 1.0384615384615385) internal successors, (108), 105 states have internal predecessors, (108), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-20 19:06:24,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 116 transitions. [2022-03-20 19:06:24,042 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 116 transitions. Word has length 106 [2022-03-20 19:06:24,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 19:06:24,042 INFO L478 AbstractCegarLoop]: Abstraction has 113 states and 116 transitions. [2022-03-20 19:06:24,042 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 91 states, 91 states have (on average 1.0879120879120878) internal successors, (99), 90 states have internal predecessors, (99), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 19:06:24,042 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 116 transitions. [2022-03-20 19:06:24,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2022-03-20 19:06:24,042 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 19:06:24,043 INFO L499 BasicCegarLoop]: trace histogram [87, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 19:06:24,043 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90 [2022-03-20 19:06:24,043 INFO L403 AbstractCegarLoop]: === Iteration 92 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 19:06:24,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 19:06:24,043 INFO L85 PathProgramCache]: Analyzing trace with hash -618744318, now seen corresponding path program 87 times [2022-03-20 19:06:24,043 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 19:06:24,043 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1702484176] [2022-03-20 19:06:24,218 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 19:06:24,219 INFO L85 PathProgramCache]: Analyzing trace with hash 2072808376, now seen corresponding path program 1 times [2022-03-20 19:06:24,219 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:06:24,219 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [267660305] [2022-03-20 19:06:24,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:06:24,219 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:06:24,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:06:24,242 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 19:06:24,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:06:24,244 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 19:06:24,244 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 19:06:24,244 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [267660305] [2022-03-20 19:06:24,244 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [267660305] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:06:24,244 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:06:24,244 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 19:06:27,196 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 19:06:27,196 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1702484176] [2022-03-20 19:06:27,196 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1702484176] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:06:27,196 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:06:27,196 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [92] imperfect sequences [] total 92 [2022-03-20 19:06:27,196 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1045583970] [2022-03-20 19:06:27,196 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 19:06:27,196 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 92 states [2022-03-20 19:06:27,196 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 19:06:27,197 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 92 interpolants. [2022-03-20 19:06:27,197 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=269, Invalid=8103, Unknown=0, NotChecked=0, Total=8372 [2022-03-20 19:06:27,197 INFO L87 Difference]: Start difference. First operand 113 states and 116 transitions. Second operand has 92 states, 92 states have (on average 1.0869565217391304) internal successors, (100), 91 states have internal predecessors, (100), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 19:06:33,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 19:06:33,453 INFO L93 Difference]: Finished difference Result 225 states and 234 transitions. [2022-03-20 19:06:33,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2022-03-20 19:06:33,454 INFO L78 Accepts]: Start accepts. Automaton has has 92 states, 92 states have (on average 1.0869565217391304) internal successors, (100), 91 states have internal predecessors, (100), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 107 [2022-03-20 19:06:33,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 19:06:33,454 INFO L225 Difference]: With dead ends: 225 [2022-03-20 19:06:33,454 INFO L226 Difference]: Without dead ends: 119 [2022-03-20 19:06:33,455 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 179 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3916 ImplicationChecksByTransitivity, 5.8s TimeCoverageRelationStatistics Valid=801, Invalid=31779, Unknown=0, NotChecked=0, Total=32580 [2022-03-20 19:06:33,456 INFO L913 BasicCegarLoop]: 19 mSDtfsCounter, 20 mSDsluCounter, 442 mSDsCounter, 0 mSdLazyCounter, 9425 mSolverCounterSat, 188 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 461 SdHoareTripleChecker+Invalid, 9613 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 188 IncrementalHoareTripleChecker+Valid, 9425 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2022-03-20 19:06:33,456 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 461 Invalid, 9613 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [188 Valid, 9425 Invalid, 0 Unknown, 0 Unchecked, 3.1s Time] [2022-03-20 19:06:33,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2022-03-20 19:06:33,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 114. [2022-03-20 19:06:33,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 105 states have (on average 1.0380952380952382) internal successors, (109), 106 states have internal predecessors, (109), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-20 19:06:33,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 117 transitions. [2022-03-20 19:06:33,547 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 117 transitions. Word has length 107 [2022-03-20 19:06:33,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 19:06:33,547 INFO L478 AbstractCegarLoop]: Abstraction has 114 states and 117 transitions. [2022-03-20 19:06:33,547 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 92 states, 92 states have (on average 1.0869565217391304) internal successors, (100), 91 states have internal predecessors, (100), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 19:06:33,548 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 117 transitions. [2022-03-20 19:06:33,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2022-03-20 19:06:33,548 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 19:06:33,548 INFO L499 BasicCegarLoop]: trace histogram [88, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 19:06:33,548 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91 [2022-03-20 19:06:33,548 INFO L403 AbstractCegarLoop]: === Iteration 93 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 19:06:33,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 19:06:33,549 INFO L85 PathProgramCache]: Analyzing trace with hash -1048922078, now seen corresponding path program 88 times [2022-03-20 19:06:33,549 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 19:06:33,549 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1772318982] [2022-03-20 19:06:33,729 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 19:06:33,730 INFO L85 PathProgramCache]: Analyzing trace with hash 2131913720, now seen corresponding path program 1 times [2022-03-20 19:06:33,730 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:06:33,730 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1931505448] [2022-03-20 19:06:33,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:06:33,730 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:06:33,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:06:33,763 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 19:06:33,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:06:33,776 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 19:06:33,776 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 19:06:33,776 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1931505448] [2022-03-20 19:06:33,776 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1931505448] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:06:33,776 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:06:33,776 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 19:06:36,948 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 19:06:36,949 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1772318982] [2022-03-20 19:06:36,949 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1772318982] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:06:36,949 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:06:36,949 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [93] imperfect sequences [] total 93 [2022-03-20 19:06:36,949 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1312398199] [2022-03-20 19:06:36,949 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 19:06:36,949 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 93 states [2022-03-20 19:06:36,949 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 19:06:36,949 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 93 interpolants. [2022-03-20 19:06:36,950 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=272, Invalid=8284, Unknown=0, NotChecked=0, Total=8556 [2022-03-20 19:06:36,950 INFO L87 Difference]: Start difference. First operand 114 states and 117 transitions. Second operand has 93 states, 93 states have (on average 1.086021505376344) internal successors, (101), 92 states have internal predecessors, (101), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 19:06:43,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 19:06:43,046 INFO L93 Difference]: Finished difference Result 227 states and 236 transitions. [2022-03-20 19:06:43,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2022-03-20 19:06:43,050 INFO L78 Accepts]: Start accepts. Automaton has has 93 states, 93 states have (on average 1.086021505376344) internal successors, (101), 92 states have internal predecessors, (101), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 108 [2022-03-20 19:06:43,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 19:06:43,051 INFO L225 Difference]: With dead ends: 227 [2022-03-20 19:06:43,051 INFO L226 Difference]: Without dead ends: 120 [2022-03-20 19:06:43,052 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 181 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4005 ImplicationChecksByTransitivity, 6.1s TimeCoverageRelationStatistics Valid=810, Invalid=32496, Unknown=0, NotChecked=0, Total=33306 [2022-03-20 19:06:43,052 INFO L913 BasicCegarLoop]: 19 mSDtfsCounter, 20 mSDsluCounter, 182 mSDsCounter, 0 mSdLazyCounter, 8878 mSolverCounterSat, 191 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 201 SdHoareTripleChecker+Invalid, 9069 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 191 IncrementalHoareTripleChecker+Valid, 8878 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2022-03-20 19:06:43,052 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 201 Invalid, 9069 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [191 Valid, 8878 Invalid, 0 Unknown, 0 Unchecked, 2.9s Time] [2022-03-20 19:06:43,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2022-03-20 19:06:43,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 115. [2022-03-20 19:06:43,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 106 states have (on average 1.0377358490566038) internal successors, (110), 107 states have internal predecessors, (110), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-20 19:06:43,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 118 transitions. [2022-03-20 19:06:43,146 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 118 transitions. Word has length 108 [2022-03-20 19:06:43,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 19:06:43,146 INFO L478 AbstractCegarLoop]: Abstraction has 115 states and 118 transitions. [2022-03-20 19:06:43,146 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 93 states, 93 states have (on average 1.086021505376344) internal successors, (101), 92 states have internal predecessors, (101), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 19:06:43,146 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 118 transitions. [2022-03-20 19:06:43,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2022-03-20 19:06:43,147 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 19:06:43,147 INFO L499 BasicCegarLoop]: trace histogram [89, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 19:06:43,147 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92 [2022-03-20 19:06:43,147 INFO L403 AbstractCegarLoop]: === Iteration 94 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 19:06:43,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 19:06:43,148 INFO L85 PathProgramCache]: Analyzing trace with hash -1499530750, now seen corresponding path program 89 times [2022-03-20 19:06:43,148 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 19:06:43,148 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1755108697] [2022-03-20 19:06:43,431 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 19:06:43,432 INFO L85 PathProgramCache]: Analyzing trace with hash -2103948232, now seen corresponding path program 1 times [2022-03-20 19:06:43,432 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:06:43,432 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1383571315] [2022-03-20 19:06:43,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:06:43,432 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:06:43,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:06:43,462 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 19:06:43,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:06:43,463 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 19:06:43,464 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 19:06:43,464 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1383571315] [2022-03-20 19:06:43,464 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1383571315] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:06:43,464 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:06:43,464 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 19:06:46,844 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 19:06:46,845 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1755108697] [2022-03-20 19:06:46,845 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1755108697] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:06:46,845 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:06:46,845 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [94] imperfect sequences [] total 94 [2022-03-20 19:06:46,845 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1148355650] [2022-03-20 19:06:46,845 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 19:06:46,845 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 94 states [2022-03-20 19:06:46,845 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 19:06:46,845 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 94 interpolants. [2022-03-20 19:06:46,846 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=275, Invalid=8467, Unknown=0, NotChecked=0, Total=8742 [2022-03-20 19:06:46,846 INFO L87 Difference]: Start difference. First operand 115 states and 118 transitions. Second operand has 94 states, 94 states have (on average 1.0851063829787233) internal successors, (102), 93 states have internal predecessors, (102), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 19:06:53,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 19:06:53,321 INFO L93 Difference]: Finished difference Result 229 states and 238 transitions. [2022-03-20 19:06:53,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2022-03-20 19:06:53,322 INFO L78 Accepts]: Start accepts. Automaton has has 94 states, 94 states have (on average 1.0851063829787233) internal successors, (102), 93 states have internal predecessors, (102), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 109 [2022-03-20 19:06:53,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 19:06:53,322 INFO L225 Difference]: With dead ends: 229 [2022-03-20 19:06:53,322 INFO L226 Difference]: Without dead ends: 121 [2022-03-20 19:06:53,324 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 202 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 183 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4095 ImplicationChecksByTransitivity, 6.4s TimeCoverageRelationStatistics Valid=819, Invalid=33221, Unknown=0, NotChecked=0, Total=34040 [2022-03-20 19:06:53,324 INFO L913 BasicCegarLoop]: 19 mSDtfsCounter, 20 mSDsluCounter, 397 mSDsCounter, 0 mSdLazyCounter, 9665 mSolverCounterSat, 192 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 416 SdHoareTripleChecker+Invalid, 9857 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 192 IncrementalHoareTripleChecker+Valid, 9665 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2022-03-20 19:06:53,324 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 416 Invalid, 9857 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [192 Valid, 9665 Invalid, 0 Unknown, 0 Unchecked, 3.2s Time] [2022-03-20 19:06:53,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2022-03-20 19:06:53,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 116. [2022-03-20 19:06:53,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 107 states have (on average 1.0373831775700935) internal successors, (111), 108 states have internal predecessors, (111), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-20 19:06:53,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 119 transitions. [2022-03-20 19:06:53,429 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 119 transitions. Word has length 109 [2022-03-20 19:06:53,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 19:06:53,429 INFO L478 AbstractCegarLoop]: Abstraction has 116 states and 119 transitions. [2022-03-20 19:06:53,429 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 94 states, 94 states have (on average 1.0851063829787233) internal successors, (102), 93 states have internal predecessors, (102), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 19:06:53,429 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 119 transitions. [2022-03-20 19:06:53,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2022-03-20 19:06:53,430 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 19:06:53,430 INFO L499 BasicCegarLoop]: trace histogram [90, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 19:06:53,430 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93 [2022-03-20 19:06:53,430 INFO L403 AbstractCegarLoop]: === Iteration 95 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 19:06:53,431 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 19:06:53,431 INFO L85 PathProgramCache]: Analyzing trace with hash 1711469602, now seen corresponding path program 90 times [2022-03-20 19:06:53,431 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 19:06:53,431 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1812991267] [2022-03-20 19:06:53,596 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 19:06:53,596 INFO L85 PathProgramCache]: Analyzing trace with hash -2044842888, now seen corresponding path program 1 times [2022-03-20 19:06:53,596 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:06:53,596 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1554350581] [2022-03-20 19:06:53,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:06:53,596 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:06:53,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:06:53,618 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 19:06:53,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:06:53,632 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 19:06:53,632 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 19:06:53,632 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1554350581] [2022-03-20 19:06:53,632 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1554350581] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:06:53,632 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:06:53,632 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 19:06:56,900 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 19:06:56,901 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1812991267] [2022-03-20 19:06:56,901 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1812991267] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:06:56,901 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:06:56,901 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [95] imperfect sequences [] total 95 [2022-03-20 19:06:56,901 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [93634304] [2022-03-20 19:06:56,901 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 19:06:56,901 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 95 states [2022-03-20 19:06:56,901 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 19:06:56,901 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 95 interpolants. [2022-03-20 19:06:56,902 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=278, Invalid=8652, Unknown=0, NotChecked=0, Total=8930 [2022-03-20 19:06:56,902 INFO L87 Difference]: Start difference. First operand 116 states and 119 transitions. Second operand has 95 states, 95 states have (on average 1.0842105263157895) internal successors, (103), 94 states have internal predecessors, (103), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 19:07:03,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 19:07:03,248 INFO L93 Difference]: Finished difference Result 231 states and 240 transitions. [2022-03-20 19:07:03,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2022-03-20 19:07:03,248 INFO L78 Accepts]: Start accepts. Automaton has has 95 states, 95 states have (on average 1.0842105263157895) internal successors, (103), 94 states have internal predecessors, (103), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 110 [2022-03-20 19:07:03,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 19:07:03,249 INFO L225 Difference]: With dead ends: 231 [2022-03-20 19:07:03,249 INFO L226 Difference]: Without dead ends: 122 [2022-03-20 19:07:03,250 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 204 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 185 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4186 ImplicationChecksByTransitivity, 6.4s TimeCoverageRelationStatistics Valid=828, Invalid=33954, Unknown=0, NotChecked=0, Total=34782 [2022-03-20 19:07:03,250 INFO L913 BasicCegarLoop]: 19 mSDtfsCounter, 20 mSDsluCounter, 192 mSDsCounter, 0 mSdLazyCounter, 9277 mSolverCounterSat, 194 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 211 SdHoareTripleChecker+Invalid, 9471 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 194 IncrementalHoareTripleChecker+Valid, 9277 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2022-03-20 19:07:03,251 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 211 Invalid, 9471 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [194 Valid, 9277 Invalid, 0 Unknown, 0 Unchecked, 3.0s Time] [2022-03-20 19:07:03,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2022-03-20 19:07:03,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 117. [2022-03-20 19:07:03,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 108 states have (on average 1.037037037037037) internal successors, (112), 109 states have internal predecessors, (112), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-20 19:07:03,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 120 transitions. [2022-03-20 19:07:03,349 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 120 transitions. Word has length 110 [2022-03-20 19:07:03,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 19:07:03,349 INFO L478 AbstractCegarLoop]: Abstraction has 117 states and 120 transitions. [2022-03-20 19:07:03,349 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 95 states, 95 states have (on average 1.0842105263157895) internal successors, (103), 94 states have internal predecessors, (103), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 19:07:03,349 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 120 transitions. [2022-03-20 19:07:03,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2022-03-20 19:07:03,350 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 19:07:03,350 INFO L499 BasicCegarLoop]: trace histogram [91, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 19:07:03,350 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94 [2022-03-20 19:07:03,350 INFO L403 AbstractCegarLoop]: === Iteration 96 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 19:07:03,350 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 19:07:03,350 INFO L85 PathProgramCache]: Analyzing trace with hash -1826734590, now seen corresponding path program 91 times [2022-03-20 19:07:03,351 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 19:07:03,351 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [224855385] [2022-03-20 19:07:03,626 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 19:07:03,627 INFO L85 PathProgramCache]: Analyzing trace with hash -1985737544, now seen corresponding path program 1 times [2022-03-20 19:07:03,628 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:07:03,628 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1380093050] [2022-03-20 19:07:03,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:07:03,628 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:07:03,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:07:03,676 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 19:07:03,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:07:03,680 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 19:07:03,680 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 19:07:03,681 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1380093050] [2022-03-20 19:07:03,681 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1380093050] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:07:03,681 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:07:03,681 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 19:07:07,127 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 19:07:07,127 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [224855385] [2022-03-20 19:07:07,127 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [224855385] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:07:07,127 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:07:07,127 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [96] imperfect sequences [] total 96 [2022-03-20 19:07:07,127 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [451684976] [2022-03-20 19:07:07,127 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 19:07:07,128 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 96 states [2022-03-20 19:07:07,128 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 19:07:07,128 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 96 interpolants. [2022-03-20 19:07:07,129 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=281, Invalid=8839, Unknown=0, NotChecked=0, Total=9120 [2022-03-20 19:07:07,129 INFO L87 Difference]: Start difference. First operand 117 states and 120 transitions. Second operand has 96 states, 96 states have (on average 1.0833333333333333) internal successors, (104), 95 states have internal predecessors, (104), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 19:07:13,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 19:07:13,738 INFO L93 Difference]: Finished difference Result 233 states and 242 transitions. [2022-03-20 19:07:13,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2022-03-20 19:07:13,739 INFO L78 Accepts]: Start accepts. Automaton has has 96 states, 96 states have (on average 1.0833333333333333) internal successors, (104), 95 states have internal predecessors, (104), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 111 [2022-03-20 19:07:13,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 19:07:13,740 INFO L225 Difference]: With dead ends: 233 [2022-03-20 19:07:13,740 INFO L226 Difference]: Without dead ends: 123 [2022-03-20 19:07:13,741 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 187 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4278 ImplicationChecksByTransitivity, 6.6s TimeCoverageRelationStatistics Valid=837, Invalid=34695, Unknown=0, NotChecked=0, Total=35532 [2022-03-20 19:07:13,741 INFO L913 BasicCegarLoop]: 19 mSDtfsCounter, 20 mSDsluCounter, 242 mSDsCounter, 0 mSdLazyCounter, 9605 mSolverCounterSat, 196 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 261 SdHoareTripleChecker+Invalid, 9801 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 196 IncrementalHoareTripleChecker+Valid, 9605 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2022-03-20 19:07:13,742 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 261 Invalid, 9801 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [196 Valid, 9605 Invalid, 0 Unknown, 0 Unchecked, 3.1s Time] [2022-03-20 19:07:13,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2022-03-20 19:07:13,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 118. [2022-03-20 19:07:13,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118 states, 109 states have (on average 1.036697247706422) internal successors, (113), 110 states have internal predecessors, (113), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-20 19:07:13,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 121 transitions. [2022-03-20 19:07:13,851 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 121 transitions. Word has length 111 [2022-03-20 19:07:13,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 19:07:13,851 INFO L478 AbstractCegarLoop]: Abstraction has 118 states and 121 transitions. [2022-03-20 19:07:13,851 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 96 states, 96 states have (on average 1.0833333333333333) internal successors, (104), 95 states have internal predecessors, (104), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 19:07:13,851 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 121 transitions. [2022-03-20 19:07:13,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2022-03-20 19:07:13,852 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 19:07:13,852 INFO L499 BasicCegarLoop]: trace histogram [92, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 19:07:13,852 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95 [2022-03-20 19:07:13,852 INFO L403 AbstractCegarLoop]: === Iteration 97 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 19:07:13,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 19:07:13,852 INFO L85 PathProgramCache]: Analyzing trace with hash 158085154, now seen corresponding path program 92 times [2022-03-20 19:07:13,852 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 19:07:13,852 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2032938351] [2022-03-20 19:07:14,039 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 19:07:14,040 INFO L85 PathProgramCache]: Analyzing trace with hash -1926632200, now seen corresponding path program 1 times [2022-03-20 19:07:14,040 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:07:14,040 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [70046418] [2022-03-20 19:07:14,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:07:14,040 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:07:14,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:07:14,065 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 19:07:14,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:07:14,067 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 19:07:14,067 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 19:07:14,067 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [70046418] [2022-03-20 19:07:14,067 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [70046418] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:07:14,067 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:07:14,067 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 19:07:17,512 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 19:07:17,512 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2032938351] [2022-03-20 19:07:17,512 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2032938351] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:07:17,512 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:07:17,512 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [97] imperfect sequences [] total 97 [2022-03-20 19:07:17,512 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1402679859] [2022-03-20 19:07:17,512 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 19:07:17,512 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 97 states [2022-03-20 19:07:17,513 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 19:07:17,513 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 97 interpolants. [2022-03-20 19:07:17,513 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=284, Invalid=9028, Unknown=0, NotChecked=0, Total=9312 [2022-03-20 19:07:17,514 INFO L87 Difference]: Start difference. First operand 118 states and 121 transitions. Second operand has 97 states, 97 states have (on average 1.0824742268041236) internal successors, (105), 96 states have internal predecessors, (105), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 19:07:24,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 19:07:24,434 INFO L93 Difference]: Finished difference Result 235 states and 244 transitions. [2022-03-20 19:07:24,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2022-03-20 19:07:24,434 INFO L78 Accepts]: Start accepts. Automaton has has 97 states, 97 states have (on average 1.0824742268041236) internal successors, (105), 96 states have internal predecessors, (105), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 112 [2022-03-20 19:07:24,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 19:07:24,435 INFO L225 Difference]: With dead ends: 235 [2022-03-20 19:07:24,435 INFO L226 Difference]: Without dead ends: 124 [2022-03-20 19:07:24,437 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 208 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 189 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4371 ImplicationChecksByTransitivity, 6.7s TimeCoverageRelationStatistics Valid=846, Invalid=35444, Unknown=0, NotChecked=0, Total=36290 [2022-03-20 19:07:24,437 INFO L913 BasicCegarLoop]: 19 mSDtfsCounter, 20 mSDsluCounter, 387 mSDsCounter, 0 mSdLazyCounter, 10201 mSolverCounterSat, 198 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 406 SdHoareTripleChecker+Invalid, 10399 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 198 IncrementalHoareTripleChecker+Valid, 10201 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.4s IncrementalHoareTripleChecker+Time [2022-03-20 19:07:24,437 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 406 Invalid, 10399 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [198 Valid, 10201 Invalid, 0 Unknown, 0 Unchecked, 3.4s Time] [2022-03-20 19:07:24,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2022-03-20 19:07:24,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 119. [2022-03-20 19:07:24,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 110 states have (on average 1.0363636363636364) internal successors, (114), 111 states have internal predecessors, (114), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-20 19:07:24,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 122 transitions. [2022-03-20 19:07:24,563 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 122 transitions. Word has length 112 [2022-03-20 19:07:24,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 19:07:24,563 INFO L478 AbstractCegarLoop]: Abstraction has 119 states and 122 transitions. [2022-03-20 19:07:24,563 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 97 states, 97 states have (on average 1.0824742268041236) internal successors, (105), 96 states have internal predecessors, (105), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 19:07:24,563 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 122 transitions. [2022-03-20 19:07:24,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2022-03-20 19:07:24,564 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 19:07:24,564 INFO L499 BasicCegarLoop]: trace histogram [93, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 19:07:24,564 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96 [2022-03-20 19:07:24,564 INFO L403 AbstractCegarLoop]: === Iteration 98 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 19:07:24,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 19:07:24,565 INFO L85 PathProgramCache]: Analyzing trace with hash 1557955074, now seen corresponding path program 93 times [2022-03-20 19:07:24,565 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 19:07:24,565 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [863956487] [2022-03-20 19:07:24,730 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 19:07:24,731 INFO L85 PathProgramCache]: Analyzing trace with hash -1867526856, now seen corresponding path program 1 times [2022-03-20 19:07:24,731 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:07:24,731 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [203406117] [2022-03-20 19:07:24,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:07:24,731 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:07:24,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:07:24,752 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 19:07:24,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:07:24,754 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 19:07:24,754 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 19:07:24,754 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [203406117] [2022-03-20 19:07:24,754 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [203406117] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:07:24,754 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:07:24,754 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 19:07:28,250 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 19:07:28,250 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [863956487] [2022-03-20 19:07:28,250 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [863956487] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:07:28,250 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:07:28,251 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [98] imperfect sequences [] total 98 [2022-03-20 19:07:28,251 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [323276053] [2022-03-20 19:07:28,251 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 19:07:28,251 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 98 states [2022-03-20 19:07:28,251 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 19:07:28,251 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 98 interpolants. [2022-03-20 19:07:28,251 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=287, Invalid=9219, Unknown=0, NotChecked=0, Total=9506 [2022-03-20 19:07:28,252 INFO L87 Difference]: Start difference. First operand 119 states and 122 transitions. Second operand has 98 states, 98 states have (on average 1.0816326530612246) internal successors, (106), 97 states have internal predecessors, (106), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 19:07:35,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 19:07:35,075 INFO L93 Difference]: Finished difference Result 237 states and 246 transitions. [2022-03-20 19:07:35,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2022-03-20 19:07:35,075 INFO L78 Accepts]: Start accepts. Automaton has has 98 states, 98 states have (on average 1.0816326530612246) internal successors, (106), 97 states have internal predecessors, (106), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 113 [2022-03-20 19:07:35,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 19:07:35,076 INFO L225 Difference]: With dead ends: 237 [2022-03-20 19:07:35,076 INFO L226 Difference]: Without dead ends: 125 [2022-03-20 19:07:35,078 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 210 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 191 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4465 ImplicationChecksByTransitivity, 6.8s TimeCoverageRelationStatistics Valid=855, Invalid=36201, Unknown=0, NotChecked=0, Total=37056 [2022-03-20 19:07:35,078 INFO L913 BasicCegarLoop]: 19 mSDtfsCounter, 20 mSDsluCounter, 192 mSDsCounter, 0 mSdLazyCounter, 9846 mSolverCounterSat, 201 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 211 SdHoareTripleChecker+Invalid, 10047 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 201 IncrementalHoareTripleChecker+Valid, 9846 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2022-03-20 19:07:35,078 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 211 Invalid, 10047 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [201 Valid, 9846 Invalid, 0 Unknown, 0 Unchecked, 3.2s Time] [2022-03-20 19:07:35,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2022-03-20 19:07:35,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 120. [2022-03-20 19:07:35,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 111 states have (on average 1.0360360360360361) internal successors, (115), 112 states have internal predecessors, (115), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-20 19:07:35,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 123 transitions. [2022-03-20 19:07:35,187 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 123 transitions. Word has length 113 [2022-03-20 19:07:35,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 19:07:35,187 INFO L478 AbstractCegarLoop]: Abstraction has 120 states and 123 transitions. [2022-03-20 19:07:35,187 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 98 states, 98 states have (on average 1.0816326530612246) internal successors, (106), 97 states have internal predecessors, (106), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 19:07:35,187 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 123 transitions. [2022-03-20 19:07:35,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2022-03-20 19:07:35,187 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 19:07:35,187 INFO L499 BasicCegarLoop]: trace histogram [94, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 19:07:35,187 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97 [2022-03-20 19:07:35,188 INFO L403 AbstractCegarLoop]: === Iteration 99 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 19:07:35,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 19:07:35,188 INFO L85 PathProgramCache]: Analyzing trace with hash 2004249634, now seen corresponding path program 94 times [2022-03-20 19:07:35,188 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 19:07:35,188 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1046707356] [2022-03-20 19:07:35,400 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 19:07:35,400 INFO L85 PathProgramCache]: Analyzing trace with hash -1808421512, now seen corresponding path program 1 times [2022-03-20 19:07:35,401 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:07:35,401 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1185204338] [2022-03-20 19:07:35,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:07:35,401 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:07:35,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:07:35,428 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 19:07:35,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:07:35,430 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 19:07:35,431 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 19:07:35,431 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1185204338] [2022-03-20 19:07:35,431 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1185204338] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:07:35,431 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:07:35,431 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 19:07:39,032 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 19:07:39,032 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1046707356] [2022-03-20 19:07:39,032 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1046707356] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:07:39,032 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:07:39,032 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [99] imperfect sequences [] total 99 [2022-03-20 19:07:39,032 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [882838378] [2022-03-20 19:07:39,032 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 19:07:39,033 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 99 states [2022-03-20 19:07:39,033 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 19:07:39,033 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 99 interpolants. [2022-03-20 19:07:39,033 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=290, Invalid=9412, Unknown=0, NotChecked=0, Total=9702 [2022-03-20 19:07:39,033 INFO L87 Difference]: Start difference. First operand 120 states and 123 transitions. Second operand has 99 states, 99 states have (on average 1.0808080808080809) internal successors, (107), 98 states have internal predecessors, (107), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 19:07:45,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 19:07:45,834 INFO L93 Difference]: Finished difference Result 239 states and 248 transitions. [2022-03-20 19:07:45,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2022-03-20 19:07:45,834 INFO L78 Accepts]: Start accepts. Automaton has has 99 states, 99 states have (on average 1.0808080808080809) internal successors, (107), 98 states have internal predecessors, (107), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 114 [2022-03-20 19:07:45,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 19:07:45,835 INFO L225 Difference]: With dead ends: 239 [2022-03-20 19:07:45,835 INFO L226 Difference]: Without dead ends: 126 [2022-03-20 19:07:45,837 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 212 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 193 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4560 ImplicationChecksByTransitivity, 7.0s TimeCoverageRelationStatistics Valid=864, Invalid=36966, Unknown=0, NotChecked=0, Total=37830 [2022-03-20 19:07:45,837 INFO L913 BasicCegarLoop]: 19 mSDtfsCounter, 20 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 9592 mSolverCounterSat, 203 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 9795 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 203 IncrementalHoareTripleChecker+Valid, 9592 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2022-03-20 19:07:45,837 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 51 Invalid, 9795 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [203 Valid, 9592 Invalid, 0 Unknown, 0 Unchecked, 3.1s Time] [2022-03-20 19:07:45,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2022-03-20 19:07:45,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 121. [2022-03-20 19:07:45,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 112 states have (on average 1.0357142857142858) internal successors, (116), 113 states have internal predecessors, (116), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-20 19:07:45,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 124 transitions. [2022-03-20 19:07:45,998 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 124 transitions. Word has length 114 [2022-03-20 19:07:45,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 19:07:45,999 INFO L478 AbstractCegarLoop]: Abstraction has 121 states and 124 transitions. [2022-03-20 19:07:45,999 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 99 states, 99 states have (on average 1.0808080808080809) internal successors, (107), 98 states have internal predecessors, (107), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 19:07:45,999 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 124 transitions. [2022-03-20 19:07:45,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2022-03-20 19:07:45,999 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 19:07:45,999 INFO L499 BasicCegarLoop]: trace histogram [95, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 19:07:45,999 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98 [2022-03-20 19:07:46,000 INFO L403 AbstractCegarLoop]: === Iteration 100 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 19:07:46,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 19:07:46,000 INFO L85 PathProgramCache]: Analyzing trace with hash -1340488190, now seen corresponding path program 95 times [2022-03-20 19:07:46,000 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 19:07:46,000 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [591478659] [2022-03-20 19:07:46,253 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 19:07:46,253 INFO L85 PathProgramCache]: Analyzing trace with hash -1749316168, now seen corresponding path program 1 times [2022-03-20 19:07:46,253 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:07:46,254 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1823258130] [2022-03-20 19:07:46,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:07:46,254 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:07:46,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:07:46,289 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 19:07:46,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:07:46,291 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 19:07:46,291 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 19:07:46,291 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1823258130] [2022-03-20 19:07:46,291 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1823258130] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:07:46,291 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:07:46,291 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 19:07:50,023 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 19:07:50,023 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [591478659] [2022-03-20 19:07:50,023 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [591478659] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:07:50,023 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:07:50,023 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [100] imperfect sequences [] total 100 [2022-03-20 19:07:50,023 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1930425252] [2022-03-20 19:07:50,024 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 19:07:50,024 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 100 states [2022-03-20 19:07:50,024 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 19:07:50,024 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 100 interpolants. [2022-03-20 19:07:50,025 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=293, Invalid=9607, Unknown=0, NotChecked=0, Total=9900 [2022-03-20 19:07:50,025 INFO L87 Difference]: Start difference. First operand 121 states and 124 transitions. Second operand has 100 states, 100 states have (on average 1.08) internal successors, (108), 99 states have internal predecessors, (108), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 19:07:57,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 19:07:57,015 INFO L93 Difference]: Finished difference Result 241 states and 250 transitions. [2022-03-20 19:07:57,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2022-03-20 19:07:57,015 INFO L78 Accepts]: Start accepts. Automaton has has 100 states, 100 states have (on average 1.08) internal successors, (108), 99 states have internal predecessors, (108), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 115 [2022-03-20 19:07:57,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 19:07:57,016 INFO L225 Difference]: With dead ends: 241 [2022-03-20 19:07:57,016 INFO L226 Difference]: Without dead ends: 127 [2022-03-20 19:07:57,018 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 214 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 195 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4656 ImplicationChecksByTransitivity, 7.2s TimeCoverageRelationStatistics Valid=873, Invalid=37739, Unknown=0, NotChecked=0, Total=38612 [2022-03-20 19:07:57,018 INFO L913 BasicCegarLoop]: 19 mSDtfsCounter, 20 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 9788 mSolverCounterSat, 205 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 9993 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 205 IncrementalHoareTripleChecker+Valid, 9788 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2022-03-20 19:07:57,019 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 51 Invalid, 9993 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [205 Valid, 9788 Invalid, 0 Unknown, 0 Unchecked, 3.2s Time] [2022-03-20 19:07:57,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2022-03-20 19:07:57,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 122. [2022-03-20 19:07:57,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122 states, 113 states have (on average 1.0353982300884956) internal successors, (117), 114 states have internal predecessors, (117), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-20 19:07:57,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 125 transitions. [2022-03-20 19:07:57,152 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 125 transitions. Word has length 115 [2022-03-20 19:07:57,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 19:07:57,152 INFO L478 AbstractCegarLoop]: Abstraction has 122 states and 125 transitions. [2022-03-20 19:07:57,152 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 100 states, 100 states have (on average 1.08) internal successors, (108), 99 states have internal predecessors, (108), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 19:07:57,152 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 125 transitions. [2022-03-20 19:07:57,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2022-03-20 19:07:57,152 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 19:07:57,153 INFO L499 BasicCegarLoop]: trace histogram [96, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 19:07:57,153 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99 [2022-03-20 19:07:57,153 INFO L403 AbstractCegarLoop]: === Iteration 101 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 19:07:57,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 19:07:57,153 INFO L85 PathProgramCache]: Analyzing trace with hash -1948145630, now seen corresponding path program 96 times [2022-03-20 19:07:57,153 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 19:07:57,153 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [225621628] [2022-03-20 19:07:57,358 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 19:07:57,359 INFO L85 PathProgramCache]: Analyzing trace with hash -1690210824, now seen corresponding path program 1 times [2022-03-20 19:07:57,359 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:07:57,359 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2036112830] [2022-03-20 19:07:57,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:07:57,359 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:07:57,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:07:57,385 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 19:07:57,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:07:57,387 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 19:07:57,387 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 19:07:57,387 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2036112830] [2022-03-20 19:07:57,387 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2036112830] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:07:57,387 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:07:57,387 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 19:08:01,134 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 19:08:01,134 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [225621628] [2022-03-20 19:08:01,134 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [225621628] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:08:01,134 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:08:01,134 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [101] imperfect sequences [] total 101 [2022-03-20 19:08:01,134 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1936658385] [2022-03-20 19:08:01,135 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 19:08:01,135 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 101 states [2022-03-20 19:08:01,135 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 19:08:01,135 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 101 interpolants. [2022-03-20 19:08:01,136 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=296, Invalid=9804, Unknown=0, NotChecked=0, Total=10100 [2022-03-20 19:08:01,136 INFO L87 Difference]: Start difference. First operand 122 states and 125 transitions. Second operand has 101 states, 101 states have (on average 1.0792079207920793) internal successors, (109), 100 states have internal predecessors, (109), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 19:08:08,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 19:08:08,486 INFO L93 Difference]: Finished difference Result 243 states and 252 transitions. [2022-03-20 19:08:08,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 101 states. [2022-03-20 19:08:08,486 INFO L78 Accepts]: Start accepts. Automaton has has 101 states, 101 states have (on average 1.0792079207920793) internal successors, (109), 100 states have internal predecessors, (109), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 116 [2022-03-20 19:08:08,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 19:08:08,487 INFO L225 Difference]: With dead ends: 243 [2022-03-20 19:08:08,487 INFO L226 Difference]: Without dead ends: 128 [2022-03-20 19:08:08,490 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 216 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 197 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4753 ImplicationChecksByTransitivity, 7.2s TimeCoverageRelationStatistics Valid=882, Invalid=38520, Unknown=0, NotChecked=0, Total=39402 [2022-03-20 19:08:08,490 INFO L913 BasicCegarLoop]: 19 mSDtfsCounter, 20 mSDsluCounter, 297 mSDsCounter, 0 mSdLazyCounter, 10729 mSolverCounterSat, 206 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 316 SdHoareTripleChecker+Invalid, 10935 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 206 IncrementalHoareTripleChecker+Valid, 10729 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.5s IncrementalHoareTripleChecker+Time [2022-03-20 19:08:08,490 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 316 Invalid, 10935 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [206 Valid, 10729 Invalid, 0 Unknown, 0 Unchecked, 3.5s Time] [2022-03-20 19:08:08,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2022-03-20 19:08:08,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 123. [2022-03-20 19:08:08,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 114 states have (on average 1.0350877192982457) internal successors, (118), 115 states have internal predecessors, (118), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-20 19:08:08,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 126 transitions. [2022-03-20 19:08:08,613 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 126 transitions. Word has length 116 [2022-03-20 19:08:08,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 19:08:08,613 INFO L478 AbstractCegarLoop]: Abstraction has 123 states and 126 transitions. [2022-03-20 19:08:08,613 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 101 states, 101 states have (on average 1.0792079207920793) internal successors, (109), 100 states have internal predecessors, (109), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 19:08:08,613 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 126 transitions. [2022-03-20 19:08:08,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2022-03-20 19:08:08,614 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 19:08:08,614 INFO L499 BasicCegarLoop]: trace histogram [97, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 19:08:08,614 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100 [2022-03-20 19:08:08,614 INFO L403 AbstractCegarLoop]: === Iteration 102 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 19:08:08,614 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 19:08:08,614 INFO L85 PathProgramCache]: Analyzing trace with hash 689310210, now seen corresponding path program 97 times [2022-03-20 19:08:08,614 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 19:08:08,614 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [626391844] [2022-03-20 19:08:08,809 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 19:08:08,810 INFO L85 PathProgramCache]: Analyzing trace with hash -1631105480, now seen corresponding path program 1 times [2022-03-20 19:08:08,810 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:08:08,810 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [803211291] [2022-03-20 19:08:08,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:08:08,810 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:08:08,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:08:08,839 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 19:08:08,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:08:08,841 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 19:08:08,841 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 19:08:08,841 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [803211291] [2022-03-20 19:08:08,841 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [803211291] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:08:08,841 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:08:08,841 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 19:08:12,653 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 19:08:12,653 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [626391844] [2022-03-20 19:08:12,653 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [626391844] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:08:12,653 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:08:12,653 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [102] imperfect sequences [] total 102 [2022-03-20 19:08:12,653 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [747756815] [2022-03-20 19:08:12,653 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 19:08:12,654 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 102 states [2022-03-20 19:08:12,654 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 19:08:12,654 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 102 interpolants. [2022-03-20 19:08:12,654 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=299, Invalid=10003, Unknown=0, NotChecked=0, Total=10302 [2022-03-20 19:08:12,654 INFO L87 Difference]: Start difference. First operand 123 states and 126 transitions. Second operand has 102 states, 102 states have (on average 1.0784313725490196) internal successors, (110), 101 states have internal predecessors, (110), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 19:08:19,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 19:08:19,882 INFO L93 Difference]: Finished difference Result 245 states and 254 transitions. [2022-03-20 19:08:19,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 102 states. [2022-03-20 19:08:19,883 INFO L78 Accepts]: Start accepts. Automaton has has 102 states, 102 states have (on average 1.0784313725490196) internal successors, (110), 101 states have internal predecessors, (110), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 117 [2022-03-20 19:08:19,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 19:08:19,884 INFO L225 Difference]: With dead ends: 245 [2022-03-20 19:08:19,884 INFO L226 Difference]: Without dead ends: 129 [2022-03-20 19:08:19,887 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 218 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 199 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4851 ImplicationChecksByTransitivity, 7.4s TimeCoverageRelationStatistics Valid=891, Invalid=39309, Unknown=0, NotChecked=0, Total=40200 [2022-03-20 19:08:19,887 INFO L913 BasicCegarLoop]: 19 mSDtfsCounter, 20 mSDsluCounter, 122 mSDsCounter, 0 mSdLazyCounter, 10438 mSolverCounterSat, 209 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 141 SdHoareTripleChecker+Invalid, 10647 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 209 IncrementalHoareTripleChecker+Valid, 10438 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.4s IncrementalHoareTripleChecker+Time [2022-03-20 19:08:19,887 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 141 Invalid, 10647 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [209 Valid, 10438 Invalid, 0 Unknown, 0 Unchecked, 3.4s Time] [2022-03-20 19:08:19,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2022-03-20 19:08:20,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 124. [2022-03-20 19:08:20,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 115 states have (on average 1.0347826086956522) internal successors, (119), 116 states have internal predecessors, (119), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-20 19:08:20,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 127 transitions. [2022-03-20 19:08:20,019 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 127 transitions. Word has length 117 [2022-03-20 19:08:20,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 19:08:20,019 INFO L478 AbstractCegarLoop]: Abstraction has 124 states and 127 transitions. [2022-03-20 19:08:20,020 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 102 states, 102 states have (on average 1.0784313725490196) internal successors, (110), 101 states have internal predecessors, (110), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 19:08:20,020 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 127 transitions. [2022-03-20 19:08:20,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2022-03-20 19:08:20,020 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 19:08:20,020 INFO L499 BasicCegarLoop]: trace histogram [98, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 19:08:20,020 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101 [2022-03-20 19:08:20,021 INFO L403 AbstractCegarLoop]: === Iteration 103 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 19:08:20,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 19:08:20,021 INFO L85 PathProgramCache]: Analyzing trace with hash 846062626, now seen corresponding path program 98 times [2022-03-20 19:08:20,021 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 19:08:20,021 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [608711255] [2022-03-20 19:08:20,220 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 19:08:20,220 INFO L85 PathProgramCache]: Analyzing trace with hash -1572000136, now seen corresponding path program 1 times [2022-03-20 19:08:20,220 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:08:20,220 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1144062975] [2022-03-20 19:08:20,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:08:20,220 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:08:20,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:08:20,245 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 19:08:20,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:08:20,247 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 19:08:20,247 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 19:08:20,247 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1144062975] [2022-03-20 19:08:20,247 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1144062975] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:08:20,248 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:08:20,248 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 19:08:24,204 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 19:08:24,205 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [608711255] [2022-03-20 19:08:24,205 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [608711255] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:08:24,205 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:08:24,205 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [103] imperfect sequences [] total 103 [2022-03-20 19:08:24,205 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [796578598] [2022-03-20 19:08:24,205 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 19:08:24,205 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 103 states [2022-03-20 19:08:24,205 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 19:08:24,205 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 103 interpolants. [2022-03-20 19:08:24,206 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=302, Invalid=10204, Unknown=0, NotChecked=0, Total=10506 [2022-03-20 19:08:24,206 INFO L87 Difference]: Start difference. First operand 124 states and 127 transitions. Second operand has 103 states, 103 states have (on average 1.0776699029126213) internal successors, (111), 102 states have internal predecessors, (111), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 19:08:31,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 19:08:31,744 INFO L93 Difference]: Finished difference Result 247 states and 256 transitions. [2022-03-20 19:08:31,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 103 states. [2022-03-20 19:08:31,745 INFO L78 Accepts]: Start accepts. Automaton has has 103 states, 103 states have (on average 1.0776699029126213) internal successors, (111), 102 states have internal predecessors, (111), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 118 [2022-03-20 19:08:31,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 19:08:31,745 INFO L225 Difference]: With dead ends: 247 [2022-03-20 19:08:31,745 INFO L226 Difference]: Without dead ends: 130 [2022-03-20 19:08:31,747 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 220 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 201 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4950 ImplicationChecksByTransitivity, 7.6s TimeCoverageRelationStatistics Valid=900, Invalid=40106, Unknown=0, NotChecked=0, Total=41006 [2022-03-20 19:08:31,748 INFO L913 BasicCegarLoop]: 19 mSDtfsCounter, 20 mSDsluCounter, 187 mSDsCounter, 0 mSdLazyCounter, 10822 mSolverCounterSat, 211 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 206 SdHoareTripleChecker+Invalid, 11033 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 211 IncrementalHoareTripleChecker+Valid, 10822 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.5s IncrementalHoareTripleChecker+Time [2022-03-20 19:08:31,748 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 206 Invalid, 11033 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [211 Valid, 10822 Invalid, 0 Unknown, 0 Unchecked, 3.5s Time] [2022-03-20 19:08:31,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2022-03-20 19:08:31,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 125. [2022-03-20 19:08:31,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 116 states have (on average 1.0344827586206897) internal successors, (120), 117 states have internal predecessors, (120), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-20 19:08:31,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 128 transitions. [2022-03-20 19:08:31,875 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 128 transitions. Word has length 118 [2022-03-20 19:08:31,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 19:08:31,875 INFO L478 AbstractCegarLoop]: Abstraction has 125 states and 128 transitions. [2022-03-20 19:08:31,875 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 103 states, 103 states have (on average 1.0776699029126213) internal successors, (111), 102 states have internal predecessors, (111), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 19:08:31,875 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 128 transitions. [2022-03-20 19:08:31,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2022-03-20 19:08:31,875 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 19:08:31,875 INFO L499 BasicCegarLoop]: trace histogram [99, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 19:08:31,875 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable102 [2022-03-20 19:08:31,876 INFO L403 AbstractCegarLoop]: === Iteration 104 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 19:08:31,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 19:08:31,876 INFO L85 PathProgramCache]: Analyzing trace with hash 1410420226, now seen corresponding path program 99 times [2022-03-20 19:08:31,876 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 19:08:31,876 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1326746221] [2022-03-20 19:08:32,093 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 19:08:32,093 INFO L85 PathProgramCache]: Analyzing trace with hash -1512894792, now seen corresponding path program 1 times [2022-03-20 19:08:32,094 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:08:32,094 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1166451672] [2022-03-20 19:08:32,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:08:32,094 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:08:32,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:08:32,127 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 19:08:32,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:08:32,129 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 19:08:32,130 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 19:08:32,130 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1166451672] [2022-03-20 19:08:32,130 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1166451672] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:08:32,130 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:08:32,130 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 19:08:36,085 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 19:08:36,085 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1326746221] [2022-03-20 19:08:36,085 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1326746221] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:08:36,085 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:08:36,085 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [104] imperfect sequences [] total 104 [2022-03-20 19:08:36,085 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1518271446] [2022-03-20 19:08:36,085 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 19:08:36,086 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 104 states [2022-03-20 19:08:36,086 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 19:08:36,086 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 104 interpolants. [2022-03-20 19:08:36,087 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=305, Invalid=10407, Unknown=0, NotChecked=0, Total=10712 [2022-03-20 19:08:36,087 INFO L87 Difference]: Start difference. First operand 125 states and 128 transitions. Second operand has 104 states, 104 states have (on average 1.0769230769230769) internal successors, (112), 103 states have internal predecessors, (112), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 19:08:44,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 19:08:44,272 INFO L93 Difference]: Finished difference Result 249 states and 258 transitions. [2022-03-20 19:08:44,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 104 states. [2022-03-20 19:08:44,273 INFO L78 Accepts]: Start accepts. Automaton has has 104 states, 104 states have (on average 1.0769230769230769) internal successors, (112), 103 states have internal predecessors, (112), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 119 [2022-03-20 19:08:44,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 19:08:44,273 INFO L225 Difference]: With dead ends: 249 [2022-03-20 19:08:44,273 INFO L226 Difference]: Without dead ends: 131 [2022-03-20 19:08:44,275 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 222 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 203 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5050 ImplicationChecksByTransitivity, 7.7s TimeCoverageRelationStatistics Valid=909, Invalid=40911, Unknown=0, NotChecked=0, Total=41820 [2022-03-20 19:08:44,276 INFO L913 BasicCegarLoop]: 19 mSDtfsCounter, 20 mSDsluCounter, 442 mSDsCounter, 0 mSdLazyCounter, 11741 mSolverCounterSat, 212 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 461 SdHoareTripleChecker+Invalid, 11953 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 212 IncrementalHoareTripleChecker+Valid, 11741 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.0s IncrementalHoareTripleChecker+Time [2022-03-20 19:08:44,276 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 461 Invalid, 11953 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [212 Valid, 11741 Invalid, 0 Unknown, 0 Unchecked, 4.0s Time] [2022-03-20 19:08:44,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2022-03-20 19:08:44,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 126. [2022-03-20 19:08:44,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 117 states have (on average 1.0341880341880343) internal successors, (121), 118 states have internal predecessors, (121), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-20 19:08:44,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 129 transitions. [2022-03-20 19:08:44,403 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 129 transitions. Word has length 119 [2022-03-20 19:08:44,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 19:08:44,404 INFO L478 AbstractCegarLoop]: Abstraction has 126 states and 129 transitions. [2022-03-20 19:08:44,404 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 104 states, 104 states have (on average 1.0769230769230769) internal successors, (112), 103 states have internal predecessors, (112), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 19:08:44,404 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 129 transitions. [2022-03-20 19:08:44,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2022-03-20 19:08:44,404 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 19:08:44,404 INFO L499 BasicCegarLoop]: trace histogram [100, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 19:08:44,404 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable103 [2022-03-20 19:08:44,404 INFO L403 AbstractCegarLoop]: === Iteration 105 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 19:08:44,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 19:08:44,404 INFO L85 PathProgramCache]: Analyzing trace with hash 1725636642, now seen corresponding path program 100 times [2022-03-20 19:08:44,404 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 19:08:44,405 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [919548034] [2022-03-20 19:08:44,587 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 19:08:44,587 INFO L85 PathProgramCache]: Analyzing trace with hash -1453789448, now seen corresponding path program 1 times [2022-03-20 19:08:44,587 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:08:44,587 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1169001958] [2022-03-20 19:08:44,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:08:44,587 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:08:44,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:08:44,612 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 19:08:44,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:08:44,614 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 19:08:44,615 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 19:08:44,615 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1169001958] [2022-03-20 19:08:44,615 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1169001958] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:08:44,615 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:08:44,615 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 19:08:48,751 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 19:08:48,751 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [919548034] [2022-03-20 19:08:48,751 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [919548034] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:08:48,751 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:08:48,751 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [105] imperfect sequences [] total 105 [2022-03-20 19:08:48,751 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1888993884] [2022-03-20 19:08:48,751 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 19:08:48,751 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 105 states [2022-03-20 19:08:48,752 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 19:08:48,752 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 105 interpolants. [2022-03-20 19:08:48,752 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=308, Invalid=10612, Unknown=0, NotChecked=0, Total=10920 [2022-03-20 19:08:48,753 INFO L87 Difference]: Start difference. First operand 126 states and 129 transitions. Second operand has 105 states, 105 states have (on average 1.0761904761904761) internal successors, (113), 104 states have internal predecessors, (113), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 19:08:56,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 19:08:56,642 INFO L93 Difference]: Finished difference Result 251 states and 260 transitions. [2022-03-20 19:08:56,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 105 states. [2022-03-20 19:08:56,643 INFO L78 Accepts]: Start accepts. Automaton has has 105 states, 105 states have (on average 1.0761904761904761) internal successors, (113), 104 states have internal predecessors, (113), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 120 [2022-03-20 19:08:56,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 19:08:56,643 INFO L225 Difference]: With dead ends: 251 [2022-03-20 19:08:56,643 INFO L226 Difference]: Without dead ends: 132 [2022-03-20 19:08:56,645 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 224 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 205 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5151 ImplicationChecksByTransitivity, 8.1s TimeCoverageRelationStatistics Valid=918, Invalid=41724, Unknown=0, NotChecked=0, Total=42642 [2022-03-20 19:08:56,645 INFO L913 BasicCegarLoop]: 19 mSDtfsCounter, 20 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 10798 mSolverCounterSat, 215 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 11013 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 215 IncrementalHoareTripleChecker+Valid, 10798 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.6s IncrementalHoareTripleChecker+Time [2022-03-20 19:08:56,645 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 51 Invalid, 11013 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [215 Valid, 10798 Invalid, 0 Unknown, 0 Unchecked, 3.6s Time] [2022-03-20 19:08:56,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2022-03-20 19:08:56,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 127. [2022-03-20 19:08:56,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127 states, 118 states have (on average 1.0338983050847457) internal successors, (122), 119 states have internal predecessors, (122), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-20 19:08:56,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 130 transitions. [2022-03-20 19:08:56,777 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 130 transitions. Word has length 120 [2022-03-20 19:08:56,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 19:08:56,777 INFO L478 AbstractCegarLoop]: Abstraction has 127 states and 130 transitions. [2022-03-20 19:08:56,777 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 105 states, 105 states have (on average 1.0761904761904761) internal successors, (113), 104 states have internal predecessors, (113), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 19:08:56,777 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 130 transitions. [2022-03-20 19:08:56,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2022-03-20 19:08:56,777 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 19:08:56,778 INFO L499 BasicCegarLoop]: trace histogram [101, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 19:08:56,778 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104 [2022-03-20 19:08:56,778 INFO L403 AbstractCegarLoop]: === Iteration 106 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 19:08:56,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 19:08:56,778 INFO L85 PathProgramCache]: Analyzing trace with hash -1387556350, now seen corresponding path program 101 times [2022-03-20 19:08:56,778 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 19:08:56,778 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2113654129] [2022-03-20 19:08:56,994 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 19:08:56,995 INFO L85 PathProgramCache]: Analyzing trace with hash -1394684104, now seen corresponding path program 1 times [2022-03-20 19:08:56,995 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:08:56,995 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2128978434] [2022-03-20 19:08:56,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:08:56,995 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:08:57,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:08:57,021 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 19:08:57,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:08:57,023 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 19:08:57,023 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 19:08:57,023 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2128978434] [2022-03-20 19:08:57,023 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2128978434] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:08:57,023 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:08:57,024 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 19:09:01,157 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 19:09:01,157 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2113654129] [2022-03-20 19:09:01,157 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2113654129] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:09:01,157 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:09:01,157 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [106] imperfect sequences [] total 106 [2022-03-20 19:09:01,157 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [517738630] [2022-03-20 19:09:01,158 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 19:09:01,159 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 106 states [2022-03-20 19:09:01,159 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 19:09:01,159 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 106 interpolants. [2022-03-20 19:09:01,160 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=311, Invalid=10819, Unknown=0, NotChecked=0, Total=11130 [2022-03-20 19:09:01,160 INFO L87 Difference]: Start difference. First operand 127 states and 130 transitions. Second operand has 106 states, 106 states have (on average 1.0754716981132075) internal successors, (114), 105 states have internal predecessors, (114), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 19:09:09,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 19:09:09,362 INFO L93 Difference]: Finished difference Result 253 states and 262 transitions. [2022-03-20 19:09:09,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 106 states. [2022-03-20 19:09:09,363 INFO L78 Accepts]: Start accepts. Automaton has has 106 states, 106 states have (on average 1.0754716981132075) internal successors, (114), 105 states have internal predecessors, (114), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 121 [2022-03-20 19:09:09,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 19:09:09,363 INFO L225 Difference]: With dead ends: 253 [2022-03-20 19:09:09,363 INFO L226 Difference]: Without dead ends: 133 [2022-03-20 19:09:09,366 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 226 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 207 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5253 ImplicationChecksByTransitivity, 8.1s TimeCoverageRelationStatistics Valid=927, Invalid=42545, Unknown=0, NotChecked=0, Total=43472 [2022-03-20 19:09:09,366 INFO L913 BasicCegarLoop]: 19 mSDtfsCounter, 20 mSDsluCounter, 172 mSDsCounter, 0 mSdLazyCounter, 11398 mSolverCounterSat, 217 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 191 SdHoareTripleChecker+Invalid, 11615 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 217 IncrementalHoareTripleChecker+Valid, 11398 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.9s IncrementalHoareTripleChecker+Time [2022-03-20 19:09:09,366 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 191 Invalid, 11615 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [217 Valid, 11398 Invalid, 0 Unknown, 0 Unchecked, 3.9s Time] [2022-03-20 19:09:09,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2022-03-20 19:09:09,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 128. [2022-03-20 19:09:09,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128 states, 119 states have (on average 1.0336134453781514) internal successors, (123), 120 states have internal predecessors, (123), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-20 19:09:09,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 131 transitions. [2022-03-20 19:09:09,499 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 131 transitions. Word has length 121 [2022-03-20 19:09:09,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 19:09:09,499 INFO L478 AbstractCegarLoop]: Abstraction has 128 states and 131 transitions. [2022-03-20 19:09:09,499 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 106 states, 106 states have (on average 1.0754716981132075) internal successors, (114), 105 states have internal predecessors, (114), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 19:09:09,499 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 131 transitions. [2022-03-20 19:09:09,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2022-03-20 19:09:09,499 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 19:09:09,500 INFO L499 BasicCegarLoop]: trace histogram [102, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 19:09:09,500 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105 [2022-03-20 19:09:09,500 INFO L403 AbstractCegarLoop]: === Iteration 107 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 19:09:09,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 19:09:09,500 INFO L85 PathProgramCache]: Analyzing trace with hash 887708706, now seen corresponding path program 102 times [2022-03-20 19:09:09,500 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 19:09:09,500 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [243960324] [2022-03-20 19:09:09,717 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 19:09:09,717 INFO L85 PathProgramCache]: Analyzing trace with hash -1335578760, now seen corresponding path program 1 times [2022-03-20 19:09:09,717 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:09:09,717 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1824536383] [2022-03-20 19:09:09,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:09:09,718 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:09:09,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:09:09,754 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 19:09:09,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:09:09,756 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 19:09:09,756 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 19:09:09,756 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1824536383] [2022-03-20 19:09:09,756 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1824536383] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:09:09,757 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:09:09,757 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 19:09:13,888 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 19:09:13,888 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [243960324] [2022-03-20 19:09:13,888 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [243960324] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:09:13,888 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:09:13,888 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [107] imperfect sequences [] total 107 [2022-03-20 19:09:13,888 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1235976858] [2022-03-20 19:09:13,888 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 19:09:13,889 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 107 states [2022-03-20 19:09:13,889 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 19:09:13,889 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 107 interpolants. [2022-03-20 19:09:13,889 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=314, Invalid=11028, Unknown=0, NotChecked=0, Total=11342 [2022-03-20 19:09:13,890 INFO L87 Difference]: Start difference. First operand 128 states and 131 transitions. Second operand has 107 states, 107 states have (on average 1.074766355140187) internal successors, (115), 106 states have internal predecessors, (115), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 19:09:22,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 19:09:22,469 INFO L93 Difference]: Finished difference Result 255 states and 264 transitions. [2022-03-20 19:09:22,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 107 states. [2022-03-20 19:09:22,470 INFO L78 Accepts]: Start accepts. Automaton has has 107 states, 107 states have (on average 1.074766355140187) internal successors, (115), 106 states have internal predecessors, (115), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 122 [2022-03-20 19:09:22,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 19:09:22,471 INFO L225 Difference]: With dead ends: 255 [2022-03-20 19:09:22,471 INFO L226 Difference]: Without dead ends: 134 [2022-03-20 19:09:22,473 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 228 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 209 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5356 ImplicationChecksByTransitivity, 8.2s TimeCoverageRelationStatistics Valid=936, Invalid=43374, Unknown=0, NotChecked=0, Total=44310 [2022-03-20 19:09:22,473 INFO L913 BasicCegarLoop]: 19 mSDtfsCounter, 20 mSDsluCounter, 352 mSDsCounter, 0 mSdLazyCounter, 12112 mSolverCounterSat, 219 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 371 SdHoareTripleChecker+Invalid, 12331 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 219 IncrementalHoareTripleChecker+Valid, 12112 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.2s IncrementalHoareTripleChecker+Time [2022-03-20 19:09:22,473 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 371 Invalid, 12331 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [219 Valid, 12112 Invalid, 0 Unknown, 0 Unchecked, 4.2s Time] [2022-03-20 19:09:22,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2022-03-20 19:09:22,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 129. [2022-03-20 19:09:22,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 120 states have (on average 1.0333333333333334) internal successors, (124), 121 states have internal predecessors, (124), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-20 19:09:22,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 132 transitions. [2022-03-20 19:09:22,614 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 132 transitions. Word has length 122 [2022-03-20 19:09:22,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 19:09:22,614 INFO L478 AbstractCegarLoop]: Abstraction has 129 states and 132 transitions. [2022-03-20 19:09:22,615 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 107 states, 107 states have (on average 1.074766355140187) internal successors, (115), 106 states have internal predecessors, (115), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 19:09:22,615 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 132 transitions. [2022-03-20 19:09:22,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2022-03-20 19:09:22,615 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 19:09:22,615 INFO L499 BasicCegarLoop]: trace histogram [103, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 19:09:22,615 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106 [2022-03-20 19:09:22,615 INFO L403 AbstractCegarLoop]: === Iteration 108 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 19:09:22,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 19:09:22,615 INFO L85 PathProgramCache]: Analyzing trace with hash -1593518590, now seen corresponding path program 103 times [2022-03-20 19:09:22,615 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 19:09:22,616 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1188022343] [2022-03-20 19:09:22,864 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 19:09:22,865 INFO L85 PathProgramCache]: Analyzing trace with hash -1276473416, now seen corresponding path program 1 times [2022-03-20 19:09:22,865 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:09:22,865 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [275751895] [2022-03-20 19:09:22,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:09:22,865 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:09:22,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:09:22,899 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 19:09:22,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:09:22,901 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 19:09:22,901 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 19:09:22,901 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [275751895] [2022-03-20 19:09:22,901 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [275751895] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:09:22,902 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:09:22,902 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 19:09:27,139 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 19:09:27,139 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1188022343] [2022-03-20 19:09:27,139 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1188022343] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:09:27,139 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:09:27,139 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [108] imperfect sequences [] total 108 [2022-03-20 19:09:27,139 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1091793614] [2022-03-20 19:09:27,139 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 19:09:27,139 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 108 states [2022-03-20 19:09:27,139 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 19:09:27,140 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 108 interpolants. [2022-03-20 19:09:27,141 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=317, Invalid=11239, Unknown=0, NotChecked=0, Total=11556 [2022-03-20 19:09:27,141 INFO L87 Difference]: Start difference. First operand 129 states and 132 transitions. Second operand has 108 states, 108 states have (on average 1.0740740740740742) internal successors, (116), 107 states have internal predecessors, (116), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 19:09:35,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 19:09:35,464 INFO L93 Difference]: Finished difference Result 257 states and 266 transitions. [2022-03-20 19:09:35,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 108 states. [2022-03-20 19:09:35,464 INFO L78 Accepts]: Start accepts. Automaton has has 108 states, 108 states have (on average 1.0740740740740742) internal successors, (116), 107 states have internal predecessors, (116), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 123 [2022-03-20 19:09:35,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 19:09:35,465 INFO L225 Difference]: With dead ends: 257 [2022-03-20 19:09:35,465 INFO L226 Difference]: Without dead ends: 135 [2022-03-20 19:09:35,468 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 230 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 211 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5460 ImplicationChecksByTransitivity, 8.3s TimeCoverageRelationStatistics Valid=945, Invalid=44211, Unknown=0, NotChecked=0, Total=45156 [2022-03-20 19:09:35,468 INFO L913 BasicCegarLoop]: 19 mSDtfsCounter, 20 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 11428 mSolverCounterSat, 221 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 11649 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 221 IncrementalHoareTripleChecker+Valid, 11428 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.8s IncrementalHoareTripleChecker+Time [2022-03-20 19:09:35,468 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 51 Invalid, 11649 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [221 Valid, 11428 Invalid, 0 Unknown, 0 Unchecked, 3.8s Time] [2022-03-20 19:09:35,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2022-03-20 19:09:35,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 130. [2022-03-20 19:09:35,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130 states, 121 states have (on average 1.0330578512396693) internal successors, (125), 122 states have internal predecessors, (125), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-20 19:09:35,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 133 transitions. [2022-03-20 19:09:35,614 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 133 transitions. Word has length 123 [2022-03-20 19:09:35,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 19:09:35,614 INFO L478 AbstractCegarLoop]: Abstraction has 130 states and 133 transitions. [2022-03-20 19:09:35,614 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 108 states, 108 states have (on average 1.0740740740740742) internal successors, (116), 107 states have internal predecessors, (116), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 19:09:35,614 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 133 transitions. [2022-03-20 19:09:35,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2022-03-20 19:09:35,615 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 19:09:35,615 INFO L499 BasicCegarLoop]: trace histogram [104, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 19:09:35,615 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107 [2022-03-20 19:09:35,615 INFO L403 AbstractCegarLoop]: === Iteration 109 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 19:09:35,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 19:09:35,615 INFO L85 PathProgramCache]: Analyzing trace with hash -1202153438, now seen corresponding path program 104 times [2022-03-20 19:09:35,615 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 19:09:35,615 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1369008616] [2022-03-20 19:09:35,786 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 19:09:35,787 INFO L85 PathProgramCache]: Analyzing trace with hash -1217368072, now seen corresponding path program 1 times [2022-03-20 19:09:35,787 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:09:35,787 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [944765978] [2022-03-20 19:09:35,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:09:35,787 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:09:35,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:09:35,812 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 19:09:35,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:09:35,814 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 19:09:35,814 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 19:09:35,814 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [944765978] [2022-03-20 19:09:35,815 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [944765978] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:09:35,815 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:09:35,815 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 19:09:40,137 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 19:09:40,137 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1369008616] [2022-03-20 19:09:40,137 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1369008616] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:09:40,137 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:09:40,137 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [109] imperfect sequences [] total 109 [2022-03-20 19:09:40,138 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [918282635] [2022-03-20 19:09:40,138 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 19:09:40,138 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 109 states [2022-03-20 19:09:40,138 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 19:09:40,138 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 109 interpolants. [2022-03-20 19:09:40,139 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=320, Invalid=11452, Unknown=0, NotChecked=0, Total=11772 [2022-03-20 19:09:40,139 INFO L87 Difference]: Start difference. First operand 130 states and 133 transitions. Second operand has 109 states, 109 states have (on average 1.073394495412844) internal successors, (117), 108 states have internal predecessors, (117), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 19:09:49,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 19:09:49,085 INFO L93 Difference]: Finished difference Result 259 states and 268 transitions. [2022-03-20 19:09:49,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 109 states. [2022-03-20 19:09:49,085 INFO L78 Accepts]: Start accepts. Automaton has has 109 states, 109 states have (on average 1.073394495412844) internal successors, (117), 108 states have internal predecessors, (117), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 124 [2022-03-20 19:09:49,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 19:09:49,086 INFO L225 Difference]: With dead ends: 259 [2022-03-20 19:09:49,086 INFO L226 Difference]: Without dead ends: 136 [2022-03-20 19:09:49,088 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 232 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 213 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5565 ImplicationChecksByTransitivity, 8.5s TimeCoverageRelationStatistics Valid=954, Invalid=45056, Unknown=0, NotChecked=0, Total=46010 [2022-03-20 19:09:49,088 INFO L913 BasicCegarLoop]: 19 mSDtfsCounter, 20 mSDsluCounter, 397 mSDsCounter, 0 mSdLazyCounter, 12664 mSolverCounterSat, 223 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 416 SdHoareTripleChecker+Invalid, 12887 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 223 IncrementalHoareTripleChecker+Valid, 12664 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.4s IncrementalHoareTripleChecker+Time [2022-03-20 19:09:49,089 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 416 Invalid, 12887 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [223 Valid, 12664 Invalid, 0 Unknown, 0 Unchecked, 4.4s Time] [2022-03-20 19:09:49,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2022-03-20 19:09:49,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 131. [2022-03-20 19:09:49,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 122 states have (on average 1.0327868852459017) internal successors, (126), 123 states have internal predecessors, (126), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-20 19:09:49,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 134 transitions. [2022-03-20 19:09:49,227 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 134 transitions. Word has length 124 [2022-03-20 19:09:49,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 19:09:49,227 INFO L478 AbstractCegarLoop]: Abstraction has 131 states and 134 transitions. [2022-03-20 19:09:49,227 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 109 states, 109 states have (on average 1.073394495412844) internal successors, (117), 108 states have internal predecessors, (117), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 19:09:49,227 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 134 transitions. [2022-03-20 19:09:49,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2022-03-20 19:09:49,227 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 19:09:49,227 INFO L499 BasicCegarLoop]: trace histogram [105, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 19:09:49,227 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108 [2022-03-20 19:09:49,228 INFO L403 AbstractCegarLoop]: === Iteration 110 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 19:09:49,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 19:09:49,228 INFO L85 PathProgramCache]: Analyzing trace with hash -1954735614, now seen corresponding path program 105 times [2022-03-20 19:09:49,228 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 19:09:49,228 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [313030796] [2022-03-20 19:09:49,479 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 19:09:49,479 INFO L85 PathProgramCache]: Analyzing trace with hash -1158262728, now seen corresponding path program 1 times [2022-03-20 19:09:49,480 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:09:49,480 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [530405354] [2022-03-20 19:09:49,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:09:49,480 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:09:49,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:09:49,507 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 19:09:49,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:09:49,509 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 19:09:49,509 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 19:09:49,509 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [530405354] [2022-03-20 19:09:49,509 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [530405354] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:09:49,509 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:09:49,510 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 19:09:54,037 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 19:09:54,037 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [313030796] [2022-03-20 19:09:54,037 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [313030796] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:09:54,037 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:09:54,037 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [110] imperfect sequences [] total 110 [2022-03-20 19:09:54,037 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [193861494] [2022-03-20 19:09:54,037 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 19:09:54,037 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 110 states [2022-03-20 19:09:54,037 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 19:09:54,038 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 110 interpolants. [2022-03-20 19:09:54,039 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=323, Invalid=11667, Unknown=0, NotChecked=0, Total=11990 [2022-03-20 19:09:54,039 INFO L87 Difference]: Start difference. First operand 131 states and 134 transitions. Second operand has 110 states, 110 states have (on average 1.0727272727272728) internal successors, (118), 109 states have internal predecessors, (118), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 19:10:03,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 19:10:03,474 INFO L93 Difference]: Finished difference Result 261 states and 270 transitions. [2022-03-20 19:10:03,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 110 states. [2022-03-20 19:10:03,474 INFO L78 Accepts]: Start accepts. Automaton has has 110 states, 110 states have (on average 1.0727272727272728) internal successors, (118), 109 states have internal predecessors, (118), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 125 [2022-03-20 19:10:03,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 19:10:03,475 INFO L225 Difference]: With dead ends: 261 [2022-03-20 19:10:03,475 INFO L226 Difference]: Without dead ends: 137 [2022-03-20 19:10:03,477 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 234 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 215 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5671 ImplicationChecksByTransitivity, 8.9s TimeCoverageRelationStatistics Valid=963, Invalid=45909, Unknown=0, NotChecked=0, Total=46872 [2022-03-20 19:10:03,478 INFO L913 BasicCegarLoop]: 19 mSDtfsCounter, 20 mSDsluCounter, 517 mSDsCounter, 0 mSdLazyCounter, 13217 mSolverCounterSat, 224 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 536 SdHoareTripleChecker+Invalid, 13441 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 224 IncrementalHoareTripleChecker+Valid, 13217 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.7s IncrementalHoareTripleChecker+Time [2022-03-20 19:10:03,478 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 536 Invalid, 13441 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [224 Valid, 13217 Invalid, 0 Unknown, 0 Unchecked, 4.7s Time] [2022-03-20 19:10:03,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2022-03-20 19:10:03,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 132. [2022-03-20 19:10:03,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132 states, 123 states have (on average 1.032520325203252) internal successors, (127), 124 states have internal predecessors, (127), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-20 19:10:03,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 135 transitions. [2022-03-20 19:10:03,620 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 135 transitions. Word has length 125 [2022-03-20 19:10:03,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 19:10:03,620 INFO L478 AbstractCegarLoop]: Abstraction has 132 states and 135 transitions. [2022-03-20 19:10:03,620 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 110 states, 110 states have (on average 1.0727272727272728) internal successors, (118), 109 states have internal predecessors, (118), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 19:10:03,620 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 135 transitions. [2022-03-20 19:10:03,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2022-03-20 19:10:03,621 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 19:10:03,621 INFO L499 BasicCegarLoop]: trace histogram [106, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 19:10:03,621 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109 [2022-03-20 19:10:03,621 INFO L403 AbstractCegarLoop]: === Iteration 111 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 19:10:03,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 19:10:03,621 INFO L85 PathProgramCache]: Analyzing trace with hash 485020706, now seen corresponding path program 106 times [2022-03-20 19:10:03,621 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 19:10:03,621 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1370316448] [2022-03-20 19:10:03,835 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 19:10:03,836 INFO L85 PathProgramCache]: Analyzing trace with hash -1099157384, now seen corresponding path program 1 times [2022-03-20 19:10:03,836 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:10:03,836 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1093840331] [2022-03-20 19:10:03,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:10:03,837 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:10:03,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:10:03,865 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 19:10:03,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:10:03,866 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 19:10:03,867 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 19:10:03,867 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1093840331] [2022-03-20 19:10:03,867 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1093840331] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:10:03,867 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:10:03,867 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 19:10:08,307 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 19:10:08,307 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1370316448] [2022-03-20 19:10:08,307 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1370316448] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:10:08,307 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:10:08,307 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [111] imperfect sequences [] total 111 [2022-03-20 19:10:08,307 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1345122809] [2022-03-20 19:10:08,307 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 19:10:08,307 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 111 states [2022-03-20 19:10:08,307 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 19:10:08,308 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 111 interpolants. [2022-03-20 19:10:08,308 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=326, Invalid=11884, Unknown=0, NotChecked=0, Total=12210 [2022-03-20 19:10:08,309 INFO L87 Difference]: Start difference. First operand 132 states and 135 transitions. Second operand has 111 states, 111 states have (on average 1.072072072072072) internal successors, (119), 110 states have internal predecessors, (119), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 19:10:17,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 19:10:17,435 INFO L93 Difference]: Finished difference Result 263 states and 272 transitions. [2022-03-20 19:10:17,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 111 states. [2022-03-20 19:10:17,435 INFO L78 Accepts]: Start accepts. Automaton has has 111 states, 111 states have (on average 1.072072072072072) internal successors, (119), 110 states have internal predecessors, (119), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 126 [2022-03-20 19:10:17,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 19:10:17,436 INFO L225 Difference]: With dead ends: 263 [2022-03-20 19:10:17,436 INFO L226 Difference]: Without dead ends: 138 [2022-03-20 19:10:17,438 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 236 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 217 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5778 ImplicationChecksByTransitivity, 8.8s TimeCoverageRelationStatistics Valid=972, Invalid=46770, Unknown=0, NotChecked=0, Total=47742 [2022-03-20 19:10:17,438 INFO L913 BasicCegarLoop]: 19 mSDtfsCounter, 20 mSDsluCounter, 237 mSDsCounter, 0 mSdLazyCounter, 12651 mSolverCounterSat, 226 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 256 SdHoareTripleChecker+Invalid, 12877 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 226 IncrementalHoareTripleChecker+Valid, 12651 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.3s IncrementalHoareTripleChecker+Time [2022-03-20 19:10:17,439 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 256 Invalid, 12877 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [226 Valid, 12651 Invalid, 0 Unknown, 0 Unchecked, 4.3s Time] [2022-03-20 19:10:17,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2022-03-20 19:10:17,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 133. [2022-03-20 19:10:17,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 124 states have (on average 1.032258064516129) internal successors, (128), 125 states have internal predecessors, (128), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-20 19:10:17,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 136 transitions. [2022-03-20 19:10:17,582 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 136 transitions. Word has length 126 [2022-03-20 19:10:17,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 19:10:17,582 INFO L478 AbstractCegarLoop]: Abstraction has 133 states and 136 transitions. [2022-03-20 19:10:17,582 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 111 states, 111 states have (on average 1.072072072072072) internal successors, (119), 110 states have internal predecessors, (119), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 19:10:17,582 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 136 transitions. [2022-03-20 19:10:17,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2022-03-20 19:10:17,582 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 19:10:17,583 INFO L499 BasicCegarLoop]: trace histogram [107, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 19:10:17,583 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110 [2022-03-20 19:10:17,583 INFO L403 AbstractCegarLoop]: === Iteration 112 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 19:10:17,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 19:10:17,583 INFO L85 PathProgramCache]: Analyzing trace with hash -1191944702, now seen corresponding path program 107 times [2022-03-20 19:10:17,583 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 19:10:17,583 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1301623967] [2022-03-20 19:10:17,892 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 19:10:17,893 INFO L85 PathProgramCache]: Analyzing trace with hash -1040052040, now seen corresponding path program 1 times [2022-03-20 19:10:17,893 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:10:17,893 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1747636839] [2022-03-20 19:10:17,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:10:17,893 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:10:17,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:10:17,946 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 19:10:17,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:10:17,948 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 19:10:17,948 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 19:10:17,948 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1747636839] [2022-03-20 19:10:17,948 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1747636839] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:10:17,948 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:10:17,948 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 19:10:22,582 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 19:10:22,583 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1301623967] [2022-03-20 19:10:22,583 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1301623967] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:10:22,583 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:10:22,583 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [112] imperfect sequences [] total 112 [2022-03-20 19:10:22,583 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1863676625] [2022-03-20 19:10:22,583 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 19:10:22,583 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 112 states [2022-03-20 19:10:22,583 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 19:10:22,583 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 112 interpolants. [2022-03-20 19:10:22,584 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=329, Invalid=12103, Unknown=0, NotChecked=0, Total=12432 [2022-03-20 19:10:22,584 INFO L87 Difference]: Start difference. First operand 133 states and 136 transitions. Second operand has 112 states, 112 states have (on average 1.0714285714285714) internal successors, (120), 111 states have internal predecessors, (120), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 19:10:32,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 19:10:32,015 INFO L93 Difference]: Finished difference Result 265 states and 274 transitions. [2022-03-20 19:10:32,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 112 states. [2022-03-20 19:10:32,016 INFO L78 Accepts]: Start accepts. Automaton has has 112 states, 112 states have (on average 1.0714285714285714) internal successors, (120), 111 states have internal predecessors, (120), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 127 [2022-03-20 19:10:32,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 19:10:32,016 INFO L225 Difference]: With dead ends: 265 [2022-03-20 19:10:32,016 INFO L226 Difference]: Without dead ends: 139 [2022-03-20 19:10:32,018 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 238 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 219 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5886 ImplicationChecksByTransitivity, 9.1s TimeCoverageRelationStatistics Valid=981, Invalid=47639, Unknown=0, NotChecked=0, Total=48620 [2022-03-20 19:10:32,019 INFO L913 BasicCegarLoop]: 19 mSDtfsCounter, 20 mSDsluCounter, 302 mSDsCounter, 0 mSdLazyCounter, 13053 mSolverCounterSat, 228 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 321 SdHoareTripleChecker+Invalid, 13281 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 228 IncrementalHoareTripleChecker+Valid, 13053 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.5s IncrementalHoareTripleChecker+Time [2022-03-20 19:10:32,019 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 321 Invalid, 13281 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [228 Valid, 13053 Invalid, 0 Unknown, 0 Unchecked, 4.5s Time] [2022-03-20 19:10:32,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2022-03-20 19:10:32,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 134. [2022-03-20 19:10:32,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 125 states have (on average 1.032) internal successors, (129), 126 states have internal predecessors, (129), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-20 19:10:32,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 137 transitions. [2022-03-20 19:10:32,165 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 137 transitions. Word has length 127 [2022-03-20 19:10:32,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 19:10:32,166 INFO L478 AbstractCegarLoop]: Abstraction has 134 states and 137 transitions. [2022-03-20 19:10:32,166 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 112 states, 112 states have (on average 1.0714285714285714) internal successors, (120), 111 states have internal predecessors, (120), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 19:10:32,166 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 137 transitions. [2022-03-20 19:10:32,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2022-03-20 19:10:32,166 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 19:10:32,166 INFO L499 BasicCegarLoop]: trace histogram [108, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 19:10:32,166 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable111 [2022-03-20 19:10:32,166 INFO L403 AbstractCegarLoop]: === Iteration 113 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 19:10:32,166 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 19:10:32,167 INFO L85 PathProgramCache]: Analyzing trace with hash -1638264798, now seen corresponding path program 108 times [2022-03-20 19:10:32,167 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 19:10:32,167 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1973518299] [2022-03-20 19:10:32,419 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 19:10:32,420 INFO L85 PathProgramCache]: Analyzing trace with hash -980946696, now seen corresponding path program 1 times [2022-03-20 19:10:32,420 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:10:32,420 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [52273147] [2022-03-20 19:10:32,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:10:32,420 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:10:32,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:10:32,467 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 19:10:32,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:10:32,470 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 19:10:32,470 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 19:10:32,470 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [52273147] [2022-03-20 19:10:32,470 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [52273147] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:10:32,470 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:10:32,470 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 19:10:37,167 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 19:10:37,167 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1973518299] [2022-03-20 19:10:37,167 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1973518299] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:10:37,167 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:10:37,168 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [113] imperfect sequences [] total 113 [2022-03-20 19:10:37,168 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1028453738] [2022-03-20 19:10:37,168 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 19:10:37,168 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 113 states [2022-03-20 19:10:37,168 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 19:10:37,168 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 113 interpolants. [2022-03-20 19:10:37,169 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=332, Invalid=12324, Unknown=0, NotChecked=0, Total=12656 [2022-03-20 19:10:37,170 INFO L87 Difference]: Start difference. First operand 134 states and 137 transitions. Second operand has 113 states, 113 states have (on average 1.0707964601769913) internal successors, (121), 112 states have internal predecessors, (121), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 19:10:47,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 19:10:47,004 INFO L93 Difference]: Finished difference Result 267 states and 276 transitions. [2022-03-20 19:10:47,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 113 states. [2022-03-20 19:10:47,005 INFO L78 Accepts]: Start accepts. Automaton has has 113 states, 113 states have (on average 1.0707964601769913) internal successors, (121), 112 states have internal predecessors, (121), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 128 [2022-03-20 19:10:47,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 19:10:47,005 INFO L225 Difference]: With dead ends: 267 [2022-03-20 19:10:47,005 INFO L226 Difference]: Without dead ends: 140 [2022-03-20 19:10:47,007 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 240 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 221 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5995 ImplicationChecksByTransitivity, 9.3s TimeCoverageRelationStatistics Valid=990, Invalid=48516, Unknown=0, NotChecked=0, Total=49506 [2022-03-20 19:10:47,007 INFO L913 BasicCegarLoop]: 19 mSDtfsCounter, 20 mSDsluCounter, 437 mSDsCounter, 0 mSdLazyCounter, 13653 mSolverCounterSat, 230 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 456 SdHoareTripleChecker+Invalid, 13883 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 230 IncrementalHoareTripleChecker+Valid, 13653 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.8s IncrementalHoareTripleChecker+Time [2022-03-20 19:10:47,007 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 456 Invalid, 13883 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [230 Valid, 13653 Invalid, 0 Unknown, 0 Unchecked, 4.8s Time] [2022-03-20 19:10:47,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2022-03-20 19:10:47,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 135. [2022-03-20 19:10:47,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 126 states have (on average 1.0317460317460319) internal successors, (130), 127 states have internal predecessors, (130), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-20 19:10:47,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 138 transitions. [2022-03-20 19:10:47,160 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 138 transitions. Word has length 128 [2022-03-20 19:10:47,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 19:10:47,160 INFO L478 AbstractCegarLoop]: Abstraction has 135 states and 138 transitions. [2022-03-20 19:10:47,160 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 113 states, 113 states have (on average 1.0707964601769913) internal successors, (121), 112 states have internal predecessors, (121), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 19:10:47,160 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 138 transitions. [2022-03-20 19:10:47,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2022-03-20 19:10:47,160 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 19:10:47,160 INFO L499 BasicCegarLoop]: trace histogram [109, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 19:10:47,160 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable112 [2022-03-20 19:10:47,161 INFO L403 AbstractCegarLoop]: === Iteration 114 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 19:10:47,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 19:10:47,161 INFO L85 PathProgramCache]: Analyzing trace with hash 1705681410, now seen corresponding path program 109 times [2022-03-20 19:10:47,161 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 19:10:47,161 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1496347301] [2022-03-20 19:10:47,344 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 19:10:47,345 INFO L85 PathProgramCache]: Analyzing trace with hash -921841352, now seen corresponding path program 1 times [2022-03-20 19:10:47,345 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:10:47,345 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [849369033] [2022-03-20 19:10:47,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:10:47,345 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:10:47,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:10:47,373 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 19:10:47,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:10:47,376 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 19:10:47,376 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 19:10:47,376 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [849369033] [2022-03-20 19:10:47,376 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [849369033] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:10:47,376 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:10:47,376 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 19:10:52,163 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 19:10:52,164 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1496347301] [2022-03-20 19:10:52,164 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1496347301] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:10:52,164 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:10:52,164 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [114] imperfect sequences [] total 114 [2022-03-20 19:10:52,164 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1207230976] [2022-03-20 19:10:52,164 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 19:10:52,164 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 114 states [2022-03-20 19:10:52,164 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 19:10:52,167 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 114 interpolants. [2022-03-20 19:10:52,168 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=335, Invalid=12547, Unknown=0, NotChecked=0, Total=12882 [2022-03-20 19:10:52,168 INFO L87 Difference]: Start difference. First operand 135 states and 138 transitions. Second operand has 114 states, 114 states have (on average 1.0701754385964912) internal successors, (122), 113 states have internal predecessors, (122), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 19:11:01,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 19:11:01,994 INFO L93 Difference]: Finished difference Result 269 states and 278 transitions. [2022-03-20 19:11:01,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 114 states. [2022-03-20 19:11:01,994 INFO L78 Accepts]: Start accepts. Automaton has has 114 states, 114 states have (on average 1.0701754385964912) internal successors, (122), 113 states have internal predecessors, (122), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 129 [2022-03-20 19:11:01,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 19:11:01,995 INFO L225 Difference]: With dead ends: 269 [2022-03-20 19:11:01,995 INFO L226 Difference]: Without dead ends: 141 [2022-03-20 19:11:01,997 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 242 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 223 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6105 ImplicationChecksByTransitivity, 9.5s TimeCoverageRelationStatistics Valid=999, Invalid=49401, Unknown=0, NotChecked=0, Total=50400 [2022-03-20 19:11:01,997 INFO L913 BasicCegarLoop]: 19 mSDtfsCounter, 20 mSDsluCounter, 297 mSDsCounter, 0 mSdLazyCounter, 13484 mSolverCounterSat, 233 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 316 SdHoareTripleChecker+Invalid, 13717 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 233 IncrementalHoareTripleChecker+Valid, 13484 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.7s IncrementalHoareTripleChecker+Time [2022-03-20 19:11:01,997 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 316 Invalid, 13717 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [233 Valid, 13484 Invalid, 0 Unknown, 0 Unchecked, 4.7s Time] [2022-03-20 19:11:01,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2022-03-20 19:11:02,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 136. [2022-03-20 19:11:02,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 127 states have (on average 1.031496062992126) internal successors, (131), 128 states have internal predecessors, (131), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-20 19:11:02,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 139 transitions. [2022-03-20 19:11:02,148 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 139 transitions. Word has length 129 [2022-03-20 19:11:02,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 19:11:02,149 INFO L478 AbstractCegarLoop]: Abstraction has 136 states and 139 transitions. [2022-03-20 19:11:02,149 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 114 states, 114 states have (on average 1.0701754385964912) internal successors, (122), 113 states have internal predecessors, (122), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 19:11:02,149 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 139 transitions. [2022-03-20 19:11:02,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2022-03-20 19:11:02,149 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 19:11:02,149 INFO L499 BasicCegarLoop]: trace histogram [110, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 19:11:02,149 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable113 [2022-03-20 19:11:02,149 INFO L403 AbstractCegarLoop]: === Iteration 115 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 19:11:02,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 19:11:02,149 INFO L85 PathProgramCache]: Analyzing trace with hash -2006168542, now seen corresponding path program 110 times [2022-03-20 19:11:02,149 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 19:11:02,150 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [744710522] [2022-03-20 19:11:02,395 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 19:11:02,396 INFO L85 PathProgramCache]: Analyzing trace with hash -862736008, now seen corresponding path program 1 times [2022-03-20 19:11:02,396 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:11:02,396 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1124515285] [2022-03-20 19:11:02,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:11:02,396 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:11:02,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:11:02,444 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 19:11:02,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:11:02,446 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 19:11:02,446 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 19:11:02,446 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1124515285] [2022-03-20 19:11:02,446 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1124515285] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:11:02,447 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:11:02,447 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 19:11:07,278 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 19:11:07,278 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [744710522] [2022-03-20 19:11:07,278 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [744710522] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:11:07,278 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:11:07,278 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [115] imperfect sequences [] total 115 [2022-03-20 19:11:07,278 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1344100543] [2022-03-20 19:11:07,278 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 19:11:07,278 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 115 states [2022-03-20 19:11:07,279 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 19:11:07,279 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 115 interpolants. [2022-03-20 19:11:07,280 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=338, Invalid=12772, Unknown=0, NotChecked=0, Total=13110 [2022-03-20 19:11:07,280 INFO L87 Difference]: Start difference. First operand 136 states and 139 transitions. Second operand has 115 states, 115 states have (on average 1.0695652173913044) internal successors, (123), 114 states have internal predecessors, (123), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 19:11:17,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 19:11:17,178 INFO L93 Difference]: Finished difference Result 271 states and 280 transitions. [2022-03-20 19:11:17,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 115 states. [2022-03-20 19:11:17,179 INFO L78 Accepts]: Start accepts. Automaton has has 115 states, 115 states have (on average 1.0695652173913044) internal successors, (123), 114 states have internal predecessors, (123), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 130 [2022-03-20 19:11:17,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 19:11:17,179 INFO L225 Difference]: With dead ends: 271 [2022-03-20 19:11:17,179 INFO L226 Difference]: Without dead ends: 142 [2022-03-20 19:11:17,182 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 244 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 225 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6216 ImplicationChecksByTransitivity, 9.5s TimeCoverageRelationStatistics Valid=1008, Invalid=50294, Unknown=0, NotChecked=0, Total=51302 [2022-03-20 19:11:17,183 INFO L913 BasicCegarLoop]: 19 mSDtfsCounter, 20 mSDsluCounter, 287 mSDsCounter, 0 mSdLazyCounter, 13682 mSolverCounterSat, 235 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 306 SdHoareTripleChecker+Invalid, 13917 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 235 IncrementalHoareTripleChecker+Valid, 13682 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.7s IncrementalHoareTripleChecker+Time [2022-03-20 19:11:17,183 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 306 Invalid, 13917 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [235 Valid, 13682 Invalid, 0 Unknown, 0 Unchecked, 4.7s Time] [2022-03-20 19:11:17,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2022-03-20 19:11:17,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 137. [2022-03-20 19:11:17,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 128 states have (on average 1.03125) internal successors, (132), 129 states have internal predecessors, (132), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-20 19:11:17,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 140 transitions. [2022-03-20 19:11:17,410 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 140 transitions. Word has length 130 [2022-03-20 19:11:17,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 19:11:17,410 INFO L478 AbstractCegarLoop]: Abstraction has 137 states and 140 transitions. [2022-03-20 19:11:17,410 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 115 states, 115 states have (on average 1.0695652173913044) internal successors, (123), 114 states have internal predecessors, (123), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 19:11:17,410 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 140 transitions. [2022-03-20 19:11:17,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2022-03-20 19:11:17,411 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 19:11:17,411 INFO L499 BasicCegarLoop]: trace histogram [111, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 19:11:17,411 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable114 [2022-03-20 19:11:17,411 INFO L403 AbstractCegarLoop]: === Iteration 116 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 19:11:17,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 19:11:17,411 INFO L85 PathProgramCache]: Analyzing trace with hash -1109400062, now seen corresponding path program 111 times [2022-03-20 19:11:17,411 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 19:11:17,411 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [712992213] [2022-03-20 19:11:17,715 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 19:11:17,716 INFO L85 PathProgramCache]: Analyzing trace with hash -803630664, now seen corresponding path program 1 times [2022-03-20 19:11:17,716 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:11:17,716 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [225655508] [2022-03-20 19:11:17,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:11:17,716 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:11:17,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:11:17,750 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 19:11:17,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:11:17,752 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 19:11:17,752 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 19:11:17,752 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [225655508] [2022-03-20 19:11:17,752 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [225655508] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:11:17,752 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:11:17,752 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 19:11:22,757 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 19:11:22,757 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [712992213] [2022-03-20 19:11:22,757 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [712992213] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:11:22,757 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:11:22,757 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [116] imperfect sequences [] total 116 [2022-03-20 19:11:22,757 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1400715860] [2022-03-20 19:11:22,757 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 19:11:22,758 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 116 states [2022-03-20 19:11:22,758 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 19:11:22,758 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 116 interpolants. [2022-03-20 19:11:22,759 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=341, Invalid=12999, Unknown=0, NotChecked=0, Total=13340 [2022-03-20 19:11:22,759 INFO L87 Difference]: Start difference. First operand 137 states and 140 transitions. Second operand has 116 states, 116 states have (on average 1.0689655172413792) internal successors, (124), 115 states have internal predecessors, (124), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 19:11:33,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 19:11:33,076 INFO L93 Difference]: Finished difference Result 273 states and 282 transitions. [2022-03-20 19:11:33,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 116 states. [2022-03-20 19:11:33,076 INFO L78 Accepts]: Start accepts. Automaton has has 116 states, 116 states have (on average 1.0689655172413792) internal successors, (124), 115 states have internal predecessors, (124), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 131 [2022-03-20 19:11:33,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 19:11:33,077 INFO L225 Difference]: With dead ends: 273 [2022-03-20 19:11:33,077 INFO L226 Difference]: Without dead ends: 143 [2022-03-20 19:11:33,079 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 246 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 227 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6328 ImplicationChecksByTransitivity, 9.7s TimeCoverageRelationStatistics Valid=1017, Invalid=51195, Unknown=0, NotChecked=0, Total=52212 [2022-03-20 19:11:33,079 INFO L913 BasicCegarLoop]: 19 mSDtfsCounter, 20 mSDsluCounter, 532 mSDsCounter, 0 mSdLazyCounter, 14597 mSolverCounterSat, 236 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 551 SdHoareTripleChecker+Invalid, 14833 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 236 IncrementalHoareTripleChecker+Valid, 14597 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.1s IncrementalHoareTripleChecker+Time [2022-03-20 19:11:33,080 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 551 Invalid, 14833 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [236 Valid, 14597 Invalid, 0 Unknown, 0 Unchecked, 5.1s Time] [2022-03-20 19:11:33,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2022-03-20 19:11:33,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 138. [2022-03-20 19:11:33,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138 states, 129 states have (on average 1.0310077519379846) internal successors, (133), 130 states have internal predecessors, (133), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-20 19:11:33,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 141 transitions. [2022-03-20 19:11:33,257 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 141 transitions. Word has length 131 [2022-03-20 19:11:33,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 19:11:33,257 INFO L478 AbstractCegarLoop]: Abstraction has 138 states and 141 transitions. [2022-03-20 19:11:33,257 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 116 states, 116 states have (on average 1.0689655172413792) internal successors, (124), 115 states have internal predecessors, (124), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 19:11:33,257 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 141 transitions. [2022-03-20 19:11:33,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2022-03-20 19:11:33,258 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 19:11:33,258 INFO L499 BasicCegarLoop]: trace histogram [112, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 19:11:33,258 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115 [2022-03-20 19:11:33,258 INFO L403 AbstractCegarLoop]: === Iteration 117 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 19:11:33,258 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 19:11:33,258 INFO L85 PathProgramCache]: Analyzing trace with hash 920619042, now seen corresponding path program 112 times [2022-03-20 19:11:33,258 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 19:11:33,258 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1791281288] [2022-03-20 19:11:33,462 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 19:11:33,462 INFO L85 PathProgramCache]: Analyzing trace with hash -744525320, now seen corresponding path program 1 times [2022-03-20 19:11:33,462 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:11:33,462 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1377299482] [2022-03-20 19:11:33,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:11:33,463 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:11:33,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:11:33,486 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 19:11:33,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:11:33,488 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 19:11:33,488 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 19:11:33,488 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1377299482] [2022-03-20 19:11:33,488 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1377299482] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:11:33,488 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:11:33,488 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 19:11:38,335 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 19:11:38,336 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1791281288] [2022-03-20 19:11:38,336 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1791281288] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:11:38,336 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:11:38,336 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [117] imperfect sequences [] total 117 [2022-03-20 19:11:38,336 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1781412509] [2022-03-20 19:11:38,336 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 19:11:38,336 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 117 states [2022-03-20 19:11:38,336 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 19:11:38,336 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 117 interpolants. [2022-03-20 19:11:38,337 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=344, Invalid=13228, Unknown=0, NotChecked=0, Total=13572 [2022-03-20 19:11:38,337 INFO L87 Difference]: Start difference. First operand 138 states and 141 transitions. Second operand has 117 states, 117 states have (on average 1.0683760683760684) internal successors, (125), 116 states have internal predecessors, (125), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 19:11:48,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 19:11:48,144 INFO L93 Difference]: Finished difference Result 275 states and 284 transitions. [2022-03-20 19:11:48,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 117 states. [2022-03-20 19:11:48,145 INFO L78 Accepts]: Start accepts. Automaton has has 117 states, 117 states have (on average 1.0683760683760684) internal successors, (125), 116 states have internal predecessors, (125), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 132 [2022-03-20 19:11:48,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 19:11:48,145 INFO L225 Difference]: With dead ends: 275 [2022-03-20 19:11:48,145 INFO L226 Difference]: Without dead ends: 144 [2022-03-20 19:11:48,148 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 248 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 229 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6441 ImplicationChecksByTransitivity, 9.6s TimeCoverageRelationStatistics Valid=1026, Invalid=52104, Unknown=0, NotChecked=0, Total=53130 [2022-03-20 19:11:48,148 INFO L913 BasicCegarLoop]: 19 mSDtfsCounter, 20 mSDsluCounter, 187 mSDsCounter, 0 mSdLazyCounter, 13860 mSolverCounterSat, 239 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 206 SdHoareTripleChecker+Invalid, 14099 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 239 IncrementalHoareTripleChecker+Valid, 13860 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.6s IncrementalHoareTripleChecker+Time [2022-03-20 19:11:48,148 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 206 Invalid, 14099 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [239 Valid, 13860 Invalid, 0 Unknown, 0 Unchecked, 4.6s Time] [2022-03-20 19:11:48,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2022-03-20 19:11:48,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 139. [2022-03-20 19:11:48,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139 states, 130 states have (on average 1.0307692307692307) internal successors, (134), 131 states have internal predecessors, (134), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-20 19:11:48,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 142 transitions. [2022-03-20 19:11:48,308 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 142 transitions. Word has length 132 [2022-03-20 19:11:48,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 19:11:48,308 INFO L478 AbstractCegarLoop]: Abstraction has 139 states and 142 transitions. [2022-03-20 19:11:48,308 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 117 states, 117 states have (on average 1.0683760683760684) internal successors, (125), 116 states have internal predecessors, (125), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 19:11:48,308 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 142 transitions. [2022-03-20 19:11:48,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2022-03-20 19:11:48,308 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 19:11:48,308 INFO L499 BasicCegarLoop]: trace histogram [113, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 19:11:48,308 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116 [2022-03-20 19:11:48,309 INFO L403 AbstractCegarLoop]: === Iteration 118 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 19:11:48,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 19:11:48,309 INFO L85 PathProgramCache]: Analyzing trace with hash -573298174, now seen corresponding path program 113 times [2022-03-20 19:11:48,309 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 19:11:48,309 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [851770560] [2022-03-20 19:11:48,556 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 19:11:48,556 INFO L85 PathProgramCache]: Analyzing trace with hash -685419976, now seen corresponding path program 1 times [2022-03-20 19:11:48,556 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:11:48,556 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2057361408] [2022-03-20 19:11:48,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:11:48,557 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:11:48,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:11:48,596 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 19:11:48,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:11:48,598 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 19:11:48,598 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 19:11:48,598 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2057361408] [2022-03-20 19:11:48,598 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2057361408] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:11:48,598 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:11:48,598 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 19:11:53,744 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 19:11:53,744 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [851770560] [2022-03-20 19:11:53,744 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [851770560] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:11:53,744 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:11:53,744 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [118] imperfect sequences [] total 118 [2022-03-20 19:11:53,744 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2043747971] [2022-03-20 19:11:53,744 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 19:11:53,744 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 118 states [2022-03-20 19:11:53,744 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 19:11:53,745 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 118 interpolants. [2022-03-20 19:11:53,746 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=347, Invalid=13459, Unknown=0, NotChecked=0, Total=13806 [2022-03-20 19:11:53,746 INFO L87 Difference]: Start difference. First operand 139 states and 142 transitions. Second operand has 118 states, 118 states have (on average 1.0677966101694916) internal successors, (126), 117 states have internal predecessors, (126), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 19:12:04,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 19:12:04,206 INFO L93 Difference]: Finished difference Result 277 states and 286 transitions. [2022-03-20 19:12:04,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 118 states. [2022-03-20 19:12:04,206 INFO L78 Accepts]: Start accepts. Automaton has has 118 states, 118 states have (on average 1.0677966101694916) internal successors, (126), 117 states have internal predecessors, (126), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 133 [2022-03-20 19:12:04,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 19:12:04,207 INFO L225 Difference]: With dead ends: 277 [2022-03-20 19:12:04,207 INFO L226 Difference]: Without dead ends: 145 [2022-03-20 19:12:04,209 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 250 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 231 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6555 ImplicationChecksByTransitivity, 10.0s TimeCoverageRelationStatistics Valid=1035, Invalid=53021, Unknown=0, NotChecked=0, Total=54056 [2022-03-20 19:12:04,209 INFO L913 BasicCegarLoop]: 19 mSDtfsCounter, 20 mSDsluCounter, 497 mSDsCounter, 0 mSdLazyCounter, 14961 mSolverCounterSat, 240 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 516 SdHoareTripleChecker+Invalid, 15201 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 240 IncrementalHoareTripleChecker+Valid, 14961 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.2s IncrementalHoareTripleChecker+Time [2022-03-20 19:12:04,209 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 516 Invalid, 15201 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [240 Valid, 14961 Invalid, 0 Unknown, 0 Unchecked, 5.2s Time] [2022-03-20 19:12:04,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2022-03-20 19:12:04,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 140. [2022-03-20 19:12:04,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140 states, 131 states have (on average 1.0305343511450382) internal successors, (135), 132 states have internal predecessors, (135), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-20 19:12:04,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 143 transitions. [2022-03-20 19:12:04,370 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 143 transitions. Word has length 133 [2022-03-20 19:12:04,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 19:12:04,370 INFO L478 AbstractCegarLoop]: Abstraction has 140 states and 143 transitions. [2022-03-20 19:12:04,370 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 118 states, 118 states have (on average 1.0677966101694916) internal successors, (126), 117 states have internal predecessors, (126), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 19:12:04,370 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 143 transitions. [2022-03-20 19:12:04,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2022-03-20 19:12:04,370 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 19:12:04,370 INFO L499 BasicCegarLoop]: trace histogram [114, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 19:12:04,371 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117 [2022-03-20 19:12:04,371 INFO L403 AbstractCegarLoop]: === Iteration 119 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 19:12:04,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 19:12:04,371 INFO L85 PathProgramCache]: Analyzing trace with hash 359908386, now seen corresponding path program 114 times [2022-03-20 19:12:04,371 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 19:12:04,371 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1396490948] [2022-03-20 19:12:04,624 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 19:12:04,625 INFO L85 PathProgramCache]: Analyzing trace with hash -626314632, now seen corresponding path program 1 times [2022-03-20 19:12:04,625 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:12:04,625 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [945354887] [2022-03-20 19:12:04,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:12:04,625 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:12:04,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:12:04,672 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 19:12:04,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:12:04,674 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 19:12:04,674 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 19:12:04,674 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [945354887] [2022-03-20 19:12:04,674 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [945354887] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:12:04,674 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:12:04,674 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 19:12:09,875 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 19:12:09,876 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1396490948] [2022-03-20 19:12:09,876 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1396490948] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:12:09,876 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:12:09,876 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [119] imperfect sequences [] total 119 [2022-03-20 19:12:09,876 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1325105579] [2022-03-20 19:12:09,876 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 19:12:09,876 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 119 states [2022-03-20 19:12:09,876 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 19:12:09,876 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 119 interpolants. [2022-03-20 19:12:09,877 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=350, Invalid=13692, Unknown=0, NotChecked=0, Total=14042 [2022-03-20 19:12:09,878 INFO L87 Difference]: Start difference. First operand 140 states and 143 transitions. Second operand has 119 states, 119 states have (on average 1.0672268907563025) internal successors, (127), 118 states have internal predecessors, (127), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 19:12:20,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 19:12:20,210 INFO L93 Difference]: Finished difference Result 279 states and 288 transitions. [2022-03-20 19:12:20,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 119 states. [2022-03-20 19:12:20,211 INFO L78 Accepts]: Start accepts. Automaton has has 119 states, 119 states have (on average 1.0672268907563025) internal successors, (127), 118 states have internal predecessors, (127), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 134 [2022-03-20 19:12:20,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 19:12:20,211 INFO L225 Difference]: With dead ends: 279 [2022-03-20 19:12:20,211 INFO L226 Difference]: Without dead ends: 146 [2022-03-20 19:12:20,214 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 252 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 233 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6670 ImplicationChecksByTransitivity, 10.1s TimeCoverageRelationStatistics Valid=1044, Invalid=53946, Unknown=0, NotChecked=0, Total=54990 [2022-03-20 19:12:20,214 INFO L913 BasicCegarLoop]: 19 mSDtfsCounter, 20 mSDsluCounter, 367 mSDsCounter, 0 mSdLazyCounter, 14831 mSolverCounterSat, 242 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 386 SdHoareTripleChecker+Invalid, 15073 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 242 IncrementalHoareTripleChecker+Valid, 14831 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.0s IncrementalHoareTripleChecker+Time [2022-03-20 19:12:20,214 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 386 Invalid, 15073 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [242 Valid, 14831 Invalid, 0 Unknown, 0 Unchecked, 5.0s Time] [2022-03-20 19:12:20,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2022-03-20 19:12:20,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 141. [2022-03-20 19:12:20,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 132 states have (on average 1.0303030303030303) internal successors, (136), 133 states have internal predecessors, (136), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-20 19:12:20,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 144 transitions. [2022-03-20 19:12:20,380 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 144 transitions. Word has length 134 [2022-03-20 19:12:20,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 19:12:20,380 INFO L478 AbstractCegarLoop]: Abstraction has 141 states and 144 transitions. [2022-03-20 19:12:20,380 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 119 states, 119 states have (on average 1.0672268907563025) internal successors, (127), 118 states have internal predecessors, (127), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 19:12:20,380 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 144 transitions. [2022-03-20 19:12:20,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2022-03-20 19:12:20,380 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 19:12:20,380 INFO L499 BasicCegarLoop]: trace histogram [115, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 19:12:20,381 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118 [2022-03-20 19:12:20,381 INFO L403 AbstractCegarLoop]: === Iteration 120 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 19:12:20,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 19:12:20,381 INFO L85 PathProgramCache]: Analyzing trace with hash -775459326, now seen corresponding path program 115 times [2022-03-20 19:12:20,381 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 19:12:20,381 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1925265914] [2022-03-20 19:12:20,641 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 19:12:20,642 INFO L85 PathProgramCache]: Analyzing trace with hash -567209288, now seen corresponding path program 1 times [2022-03-20 19:12:20,642 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 19:12:20,642 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1581712611] [2022-03-20 19:12:20,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 19:12:20,642 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 19:12:20,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:12:20,670 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 19:12:20,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 19:12:20,671 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 19:12:20,672 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 19:12:20,672 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1581712611] [2022-03-20 19:12:20,672 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1581712611] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:12:20,672 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:12:20,672 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 19:12:25,987 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 19:12:25,988 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1925265914] [2022-03-20 19:12:25,988 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1925265914] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 19:12:25,988 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 19:12:25,988 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [120] imperfect sequences [] total 120 [2022-03-20 19:12:25,988 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2090177288] [2022-03-20 19:12:25,988 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 19:12:25,988 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 120 states [2022-03-20 19:12:25,988 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 19:12:25,988 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 120 interpolants. [2022-03-20 19:12:25,989 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=353, Invalid=13927, Unknown=0, NotChecked=0, Total=14280 [2022-03-20 19:12:25,989 INFO L87 Difference]: Start difference. First operand 141 states and 144 transitions. Second operand has 120 states, 120 states have (on average 1.0666666666666667) internal successors, (128), 119 states have internal predecessors, (128), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2)