/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/Mono3_1.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-7968f31 [2022-03-18 00:45:20,781 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-18 00:45:20,783 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-18 00:45:20,821 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-03-18 00:45:20,857 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-03-18 00:45:20,858 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-03-18 00:45:20,859 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-03-18 00:45:20,859 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationQvasr_64.epf [2022-03-18 00:45:20,867 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-18 00:45:20,867 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-18 00:45:20,869 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-18 00:45:20,869 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-18 00:45:20,869 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-18 00:45:20,869 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-18 00:45:20,869 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-18 00:45:20,869 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-18 00:45:20,869 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-18 00:45:20,870 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-18 00:45:20,870 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-18 00:45:20,870 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-18 00:45:20,870 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-18 00:45:20,870 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-03-18 00:45:20,870 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-18 00:45:20,870 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-18 00:45:20,870 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-18 00:45:20,870 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=Craig_NestedInterpolation [2022-03-18 00:45:20,870 INFO L138 SettingsManager]: * Trace refinement strategy=ACCELERATED_INTERPOLATION [2022-03-18 00:45:20,871 INFO L138 SettingsManager]: * Trace refinement strategy used in Accelerated Interpolation=CAMEL [2022-03-18 00:45:20,871 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-03-18 00:45:20,871 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=QVASR [2022-03-18 00:45:20,871 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-03-18 00:45:21,049 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-18 00:45:21,064 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-18 00:45:21,066 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-18 00:45:21,067 INFO L271 PluginConnector]: Initializing CDTParser... [2022-03-18 00:45:21,068 INFO L275 PluginConnector]: CDTParser initialized [2022-03-18 00:45:21,069 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops-crafted-1/Mono3_1.c [2022-03-18 00:45:21,128 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2746cebd6/269d53a3494443989698042d0768b065/FLAGabfa6aaae [2022-03-18 00:45:21,447 INFO L306 CDTParser]: Found 1 translation units. [2022-03-18 00:45:21,448 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops-crafted-1/Mono3_1.c [2022-03-18 00:45:21,451 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2746cebd6/269d53a3494443989698042d0768b065/FLAGabfa6aaae [2022-03-18 00:45:21,462 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2746cebd6/269d53a3494443989698042d0768b065 [2022-03-18 00:45:21,464 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-18 00:45:21,465 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-03-18 00:45:21,467 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-03-18 00:45:21,468 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-03-18 00:45:21,470 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-03-18 00:45:21,470 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.03 12:45:21" (1/1) ... [2022-03-18 00:45:21,471 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@59dc72d0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 12:45:21, skipping insertion in model container [2022-03-18 00:45:21,471 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.03 12:45:21" (1/1) ... [2022-03-18 00:45:21,475 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-03-18 00:45:21,483 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-03-18 00:45:21,577 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/Mono3_1.c[311,324] [2022-03-18 00:45:21,623 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-18 00:45:21,628 INFO L203 MainTranslator]: Completed pre-run [2022-03-18 00:45:21,636 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/Mono3_1.c[311,324] [2022-03-18 00:45:21,638 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-18 00:45:21,647 INFO L208 MainTranslator]: Completed translation [2022-03-18 00:45:21,647 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 12:45:21 WrapperNode [2022-03-18 00:45:21,647 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-03-18 00:45:21,648 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-18 00:45:21,648 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-18 00:45:21,648 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-18 00:45:21,657 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 12:45:21" (1/1) ... [2022-03-18 00:45:21,657 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 12:45:21" (1/1) ... [2022-03-18 00:45:21,663 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 12:45:21" (1/1) ... [2022-03-18 00:45:21,664 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 12:45:21" (1/1) ... [2022-03-18 00:45:21,667 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 12:45:21" (1/1) ... [2022-03-18 00:45:21,670 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 12:45:21" (1/1) ... [2022-03-18 00:45:21,675 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 12:45:21" (1/1) ... [2022-03-18 00:45:21,677 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-18 00:45:21,678 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-18 00:45:21,678 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-18 00:45:21,678 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-18 00:45:21,678 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 12:45:21" (1/1) ... [2022-03-18 00:45:21,687 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-18 00:45:21,694 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:45:21,704 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) [2022-03-18 00:45:21,709 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 [2022-03-18 00:45:21,737 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-03-18 00:45:21,737 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-18 00:45:21,738 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-03-18 00:45:21,738 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-03-18 00:45:21,738 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-03-18 00:45:21,738 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-03-18 00:45:21,738 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-03-18 00:45:21,739 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-03-18 00:45:21,739 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-03-18 00:45:21,739 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-03-18 00:45:21,739 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-03-18 00:45:21,739 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-03-18 00:45:21,739 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-03-18 00:45:21,739 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-18 00:45:21,740 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-03-18 00:45:21,740 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-03-18 00:45:21,740 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-03-18 00:45:21,787 INFO L234 CfgBuilder]: Building ICFG [2022-03-18 00:45:21,789 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-18 00:45:21,847 INFO L275 CfgBuilder]: Performing block encoding [2022-03-18 00:45:21,851 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-18 00:45:21,851 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-03-18 00:45:21,852 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.03 12:45:21 BoogieIcfgContainer [2022-03-18 00:45:21,852 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-18 00:45:21,853 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-18 00:45:21,854 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-18 00:45:21,856 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-18 00:45:21,856 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.03 12:45:21" (1/3) ... [2022-03-18 00:45:21,856 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@79923d6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.03 12:45:21, skipping insertion in model container [2022-03-18 00:45:21,857 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 12:45:21" (2/3) ... [2022-03-18 00:45:21,857 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@79923d6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.03 12:45:21, skipping insertion in model container [2022-03-18 00:45:21,857 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.03 12:45:21" (3/3) ... [2022-03-18 00:45:21,858 INFO L111 eAbstractionObserver]: Analyzing ICFG Mono3_1.c [2022-03-18 00:45:21,861 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2022-03-18 00:45:21,861 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-18 00:45:21,892 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-18 00:45:21,897 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 [2022-03-18 00:45:21,897 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-03-18 00:45:21,905 INFO L276 IsEmpty]: Start isEmpty. Operand has 20 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 13 states have internal predecessors, (17), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-18 00:45:21,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-03-18 00:45:21,910 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:45:21,911 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:45:21,911 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:45:21,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:45:21,915 INFO L85 PathProgramCache]: Analyzing trace with hash 1326077006, now seen corresponding path program 1 times [2022-03-18 00:45:21,920 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:45:21,920 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1923843058] [2022-03-18 00:45:21,927 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 00:45:21,928 INFO L85 PathProgramCache]: Analyzing trace with hash 1326077006, now seen corresponding path program 2 times [2022-03-18 00:45:21,929 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:45:21,930 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1540471979] [2022-03-18 00:45:21,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:45:21,930 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:45:21,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:45:22,033 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:45:22,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:45:22,053 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:45:22,053 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:45:22,053 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1540471979] [2022-03-18 00:45:22,054 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1540471979] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:45:22,054 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:45:22,054 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-18 00:45:22,056 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:45:22,056 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1923843058] [2022-03-18 00:45:22,056 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1923843058] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:45:22,057 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:45:22,057 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-18 00:45:22,057 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [175602079] [2022-03-18 00:45:22,057 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:45:22,060 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-03-18 00:45:22,060 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:45:22,088 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-03-18 00:45:22,089 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-18 00:45:22,091 INFO L87 Difference]: Start difference. First operand has 20 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 13 states have internal predecessors, (17), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) 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) [2022-03-18 00:45:22,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:45:22,141 INFO L93 Difference]: Finished difference Result 31 states and 35 transitions. [2022-03-18 00:45:22,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-03-18 00:45:22,143 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 [2022-03-18 00:45:22,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:45:22,146 INFO L225 Difference]: With dead ends: 31 [2022-03-18 00:45:22,147 INFO L226 Difference]: Without dead ends: 14 [2022-03-18 00:45:22,148 INFO L911 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 [2022-03-18 00:45:22,151 INFO L912 BasicCegarLoop]: 20 mSDtfsCounter, 12 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-18 00:45:22,152 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 23 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-18 00:45:22,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2022-03-18 00:45:22,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2022-03-18 00:45:22,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 9 states have (on average 1.2222222222222223) internal successors, (11), 9 states have internal predecessors, (11), 3 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) [2022-03-18 00:45:22,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 15 transitions. [2022-03-18 00:45:22,192 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 15 transitions. Word has length 11 [2022-03-18 00:45:22,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:45:22,192 INFO L478 AbstractCegarLoop]: Abstraction has 14 states and 15 transitions. [2022-03-18 00:45:22,193 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) [2022-03-18 00:45:22,193 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 15 transitions. [2022-03-18 00:45:22,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-03-18 00:45:22,193 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:45:22,193 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:45:22,193 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-18 00:45:22,193 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:45:22,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:45:22,194 INFO L85 PathProgramCache]: Analyzing trace with hash 1315918275, now seen corresponding path program 1 times [2022-03-18 00:45:22,194 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:45:22,194 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1884132565] [2022-03-18 00:45:22,195 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 00:45:22,195 INFO L85 PathProgramCache]: Analyzing trace with hash 1315918275, now seen corresponding path program 2 times [2022-03-18 00:45:22,196 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:45:22,196 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [376609723] [2022-03-18 00:45:22,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:45:22,196 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:45:22,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:45:22,262 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:45:22,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:45:22,269 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:45:22,269 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:45:22,270 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [376609723] [2022-03-18 00:45:22,270 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [376609723] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:45:22,270 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:45:22,270 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-18 00:45:22,270 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:45:22,270 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1884132565] [2022-03-18 00:45:22,270 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1884132565] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:45:22,270 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:45:22,271 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-18 00:45:22,271 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [757898839] [2022-03-18 00:45:22,271 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:45:22,271 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-18 00:45:22,272 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:45:22,272 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-18 00:45:22,272 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-18 00:45:22,272 INFO L87 Difference]: Start difference. First operand 14 states and 15 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) [2022-03-18 00:45:22,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:45:22,324 INFO L93 Difference]: Finished difference Result 25 states and 29 transitions. [2022-03-18 00:45:22,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-18 00:45:22,324 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 [2022-03-18 00:45:22,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:45:22,325 INFO L225 Difference]: With dead ends: 25 [2022-03-18 00:45:22,325 INFO L226 Difference]: Without dead ends: 17 [2022-03-18 00:45:22,326 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-18 00:45:22,326 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 13 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-18 00:45:22,327 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 19 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-18 00:45:22,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2022-03-18 00:45:22,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 16. [2022-03-18 00:45:22,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 11 states have (on average 1.1818181818181819) internal successors, (13), 11 states have internal predecessors, (13), 3 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) [2022-03-18 00:45:22,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 17 transitions. [2022-03-18 00:45:22,332 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 17 transitions. Word has length 11 [2022-03-18 00:45:22,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:45:22,332 INFO L478 AbstractCegarLoop]: Abstraction has 16 states and 17 transitions. [2022-03-18 00:45:22,332 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) [2022-03-18 00:45:22,332 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 17 transitions. [2022-03-18 00:45:22,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-03-18 00:45:22,333 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:45:22,333 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:45:22,333 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-03-18 00:45:22,333 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:45:22,334 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:45:22,334 INFO L85 PathProgramCache]: Analyzing trace with hash 644646283, now seen corresponding path program 1 times [2022-03-18 00:45:22,334 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:45:22,334 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [929790236] [2022-03-18 00:45:22,683 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-18 00:45:22,684 INFO L85 PathProgramCache]: Analyzing trace with hash -1209153456, now seen corresponding path program 1 times [2022-03-18 00:45:22,685 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:45:22,685 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1824419305] [2022-03-18 00:45:22,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:45:22,685 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:45:22,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:45:22,776 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:45:22,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:45:22,783 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:45:22,783 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:45:22,783 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1824419305] [2022-03-18 00:45:22,783 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1824419305] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:45:22,783 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:45:22,783 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-18 00:45:22,812 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:45:22,812 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [929790236] [2022-03-18 00:45:22,812 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [929790236] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:45:22,813 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:45:22,813 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-18 00:45:22,813 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1792466408] [2022-03-18 00:45:22,813 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:45:22,813 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-18 00:45:22,813 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:45:22,814 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-18 00:45:22,814 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-18 00:45:22,814 INFO L87 Difference]: Start difference. First operand 16 states and 17 transitions. Second operand has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 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) [2022-03-18 00:45:22,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:45:22,862 INFO L93 Difference]: Finished difference Result 28 states and 32 transitions. [2022-03-18 00:45:22,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-18 00:45:22,863 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 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 [2022-03-18 00:45:22,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:45:22,863 INFO L225 Difference]: With dead ends: 28 [2022-03-18 00:45:22,863 INFO L226 Difference]: Without dead ends: 20 [2022-03-18 00:45:22,864 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 8 SyntacticMatches, 3 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-03-18 00:45:22,867 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 15 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-18 00:45:22,870 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 24 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-18 00:45:22,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2022-03-18 00:45:22,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 19. [2022-03-18 00:45:22,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 14 states have (on average 1.1428571428571428) internal successors, (16), 14 states have internal predecessors, (16), 3 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) [2022-03-18 00:45:22,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 20 transitions. [2022-03-18 00:45:22,876 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 20 transitions. Word has length 14 [2022-03-18 00:45:22,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:45:22,877 INFO L478 AbstractCegarLoop]: Abstraction has 19 states and 20 transitions. [2022-03-18 00:45:22,877 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 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) [2022-03-18 00:45:22,877 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 20 transitions. [2022-03-18 00:45:22,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-18 00:45:22,878 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:45:22,878 INFO L500 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:45:22,878 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-03-18 00:45:22,880 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:45:22,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:45:22,883 INFO L85 PathProgramCache]: Analyzing trace with hash 148462787, now seen corresponding path program 2 times [2022-03-18 00:45:22,883 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:45:22,886 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1738770762] [2022-03-18 00:45:23,129 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-18 00:45:23,130 INFO L85 PathProgramCache]: Analyzing trace with hash -1150048112, now seen corresponding path program 1 times [2022-03-18 00:45:23,130 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:45:23,130 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1894985005] [2022-03-18 00:45:23,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:45:23,130 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:45:23,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:45:23,156 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:45:23,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:45:23,161 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:45:23,161 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:45:23,161 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1894985005] [2022-03-18 00:45:23,161 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1894985005] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:45:23,162 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:45:23,162 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-18 00:45:23,189 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:45:23,190 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1738770762] [2022-03-18 00:45:23,190 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1738770762] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:45:23,190 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:45:23,190 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-18 00:45:23,190 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [339866704] [2022-03-18 00:45:23,190 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:45:23,190 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-18 00:45:23,190 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:45:23,191 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-18 00:45:23,191 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-03-18 00:45:23,191 INFO L87 Difference]: Start difference. First operand 19 states and 20 transitions. Second operand has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 5 states have internal predecessors, (13), 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) [2022-03-18 00:45:23,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:45:23,268 INFO L93 Difference]: Finished difference Result 31 states and 35 transitions. [2022-03-18 00:45:23,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-18 00:45:23,268 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 5 states have internal predecessors, (13), 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 17 [2022-03-18 00:45:23,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:45:23,269 INFO L225 Difference]: With dead ends: 31 [2022-03-18 00:45:23,269 INFO L226 Difference]: Without dead ends: 23 [2022-03-18 00:45:23,269 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 8 SyntacticMatches, 5 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2022-03-18 00:45:23,270 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 17 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-18 00:45:23,270 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 29 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-18 00:45:23,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2022-03-18 00:45:23,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 22. [2022-03-18 00:45:23,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 17 states have (on average 1.1176470588235294) internal successors, (19), 17 states have internal predecessors, (19), 3 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) [2022-03-18 00:45:23,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 23 transitions. [2022-03-18 00:45:23,274 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 23 transitions. Word has length 17 [2022-03-18 00:45:23,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:45:23,274 INFO L478 AbstractCegarLoop]: Abstraction has 22 states and 23 transitions. [2022-03-18 00:45:23,274 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 5 states have internal predecessors, (13), 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) [2022-03-18 00:45:23,275 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 23 transitions. [2022-03-18 00:45:23,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-18 00:45:23,275 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:45:23,275 INFO L500 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:45:23,275 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-03-18 00:45:23,275 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:45:23,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:45:23,276 INFO L85 PathProgramCache]: Analyzing trace with hash 1623366283, now seen corresponding path program 3 times [2022-03-18 00:45:23,276 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:45:23,276 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [528009902] [2022-03-18 00:45:23,416 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-18 00:45:23,416 INFO L85 PathProgramCache]: Analyzing trace with hash -1090942768, now seen corresponding path program 1 times [2022-03-18 00:45:23,417 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:45:23,417 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [265579624] [2022-03-18 00:45:23,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:45:23,417 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:45:23,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:45:23,447 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:45:23,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:45:23,453 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:45:23,453 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:45:23,453 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [265579624] [2022-03-18 00:45:23,453 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [265579624] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:45:23,453 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:45:23,453 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-18 00:45:23,505 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:45:23,505 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [528009902] [2022-03-18 00:45:23,505 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [528009902] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:45:23,505 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:45:23,505 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-03-18 00:45:23,505 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1396699048] [2022-03-18 00:45:23,505 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:45:23,505 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-03-18 00:45:23,505 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:45:23,506 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-03-18 00:45:23,506 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-03-18 00:45:23,506 INFO L87 Difference]: Start difference. First operand 22 states and 23 transitions. Second operand has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 states have internal predecessors, (16), 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) [2022-03-18 00:45:23,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:45:23,578 INFO L93 Difference]: Finished difference Result 34 states and 38 transitions. [2022-03-18 00:45:23,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-18 00:45:23,579 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 states have internal predecessors, (16), 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 20 [2022-03-18 00:45:23,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:45:23,579 INFO L225 Difference]: With dead ends: 34 [2022-03-18 00:45:23,579 INFO L226 Difference]: Without dead ends: 26 [2022-03-18 00:45:23,580 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 8 SyntacticMatches, 7 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2022-03-18 00:45:23,580 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 19 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 77 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 84 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 77 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-18 00:45:23,580 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 34 Invalid, 84 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 77 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-18 00:45:23,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2022-03-18 00:45:23,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 25. [2022-03-18 00:45:23,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 20 states have (on average 1.1) internal successors, (22), 20 states have internal predecessors, (22), 3 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) [2022-03-18 00:45:23,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 26 transitions. [2022-03-18 00:45:23,586 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 26 transitions. Word has length 20 [2022-03-18 00:45:23,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:45:23,586 INFO L478 AbstractCegarLoop]: Abstraction has 25 states and 26 transitions. [2022-03-18 00:45:23,586 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 states have internal predecessors, (16), 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) [2022-03-18 00:45:23,586 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 26 transitions. [2022-03-18 00:45:23,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-18 00:45:23,587 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:45:23,587 INFO L500 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:45:23,587 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-03-18 00:45:23,587 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:45:23,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:45:23,587 INFO L85 PathProgramCache]: Analyzing trace with hash -1336989757, now seen corresponding path program 4 times [2022-03-18 00:45:23,587 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:45:23,588 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [816768721] [2022-03-18 00:45:23,736 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-18 00:45:23,736 INFO L85 PathProgramCache]: Analyzing trace with hash -1031837424, now seen corresponding path program 1 times [2022-03-18 00:45:23,736 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:45:23,736 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1520927944] [2022-03-18 00:45:23,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:45:23,737 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:45:23,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:45:23,766 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:45:23,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:45:23,779 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:45:23,779 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:45:23,779 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1520927944] [2022-03-18 00:45:23,780 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1520927944] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:45:23,780 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:45:23,780 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-18 00:45:23,850 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:45:23,850 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [816768721] [2022-03-18 00:45:23,850 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [816768721] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:45:23,851 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:45:23,851 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-03-18 00:45:23,851 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1593175722] [2022-03-18 00:45:23,851 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:45:23,851 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-18 00:45:23,851 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:45:23,851 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-18 00:45:23,852 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-03-18 00:45:23,852 INFO L87 Difference]: Start difference. First operand 25 states and 26 transitions. Second operand has 8 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 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) [2022-03-18 00:45:23,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:45:23,950 INFO L93 Difference]: Finished difference Result 37 states and 41 transitions. [2022-03-18 00:45:23,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-18 00:45:23,950 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 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 23 [2022-03-18 00:45:23,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:45:23,951 INFO L225 Difference]: With dead ends: 37 [2022-03-18 00:45:23,951 INFO L226 Difference]: Without dead ends: 29 [2022-03-18 00:45:23,951 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 8 SyntacticMatches, 9 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2022-03-18 00:45:23,952 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 21 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 111 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 119 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 111 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 00:45:23,952 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [21 Valid, 39 Invalid, 119 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 111 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 00:45:23,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2022-03-18 00:45:23,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 28. [2022-03-18 00:45:23,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 23 states have (on average 1.0869565217391304) internal successors, (25), 23 states have internal predecessors, (25), 3 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) [2022-03-18 00:45:23,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 29 transitions. [2022-03-18 00:45:23,957 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 29 transitions. Word has length 23 [2022-03-18 00:45:23,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:45:23,957 INFO L478 AbstractCegarLoop]: Abstraction has 28 states and 29 transitions. [2022-03-18 00:45:23,957 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 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) [2022-03-18 00:45:23,957 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 29 transitions. [2022-03-18 00:45:23,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-18 00:45:23,958 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:45:23,958 INFO L500 BasicCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:45:23,958 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-03-18 00:45:23,958 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:45:23,958 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:45:23,959 INFO L85 PathProgramCache]: Analyzing trace with hash -445321333, now seen corresponding path program 5 times [2022-03-18 00:45:23,959 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:45:23,959 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1396911081] [2022-03-18 00:45:24,103 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-18 00:45:24,103 INFO L85 PathProgramCache]: Analyzing trace with hash -972732080, now seen corresponding path program 1 times [2022-03-18 00:45:24,103 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:45:24,103 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [254392670] [2022-03-18 00:45:24,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:45:24,104 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:45:24,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:45:24,125 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:45:24,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:45:24,134 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:45:24,134 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:45:24,134 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [254392670] [2022-03-18 00:45:24,134 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [254392670] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:45:24,134 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:45:24,134 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-18 00:45:24,202 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:45:24,202 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1396911081] [2022-03-18 00:45:24,202 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1396911081] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:45:24,202 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:45:24,203 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-03-18 00:45:24,203 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [45315885] [2022-03-18 00:45:24,203 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:45:24,203 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-18 00:45:24,203 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:45:24,203 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-18 00:45:24,204 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2022-03-18 00:45:24,204 INFO L87 Difference]: Start difference. First operand 28 states and 29 transitions. Second operand has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 8 states have internal predecessors, (22), 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) [2022-03-18 00:45:24,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:45:24,319 INFO L93 Difference]: Finished difference Result 40 states and 44 transitions. [2022-03-18 00:45:24,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-18 00:45:24,319 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 8 states have internal predecessors, (22), 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 26 [2022-03-18 00:45:24,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:45:24,320 INFO L225 Difference]: With dead ends: 40 [2022-03-18 00:45:24,320 INFO L226 Difference]: Without dead ends: 32 [2022-03-18 00:45:24,320 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 8 SyntacticMatches, 11 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2022-03-18 00:45:24,321 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 23 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 151 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 160 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 151 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 00:45:24,321 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 44 Invalid, 160 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 151 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 00:45:24,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2022-03-18 00:45:24,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 31. [2022-03-18 00:45:24,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 26 states have (on average 1.0769230769230769) internal successors, (28), 26 states have internal predecessors, (28), 3 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) [2022-03-18 00:45:24,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 32 transitions. [2022-03-18 00:45:24,325 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 32 transitions. Word has length 26 [2022-03-18 00:45:24,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:45:24,326 INFO L478 AbstractCegarLoop]: Abstraction has 31 states and 32 transitions. [2022-03-18 00:45:24,326 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 8 states have internal predecessors, (22), 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) [2022-03-18 00:45:24,326 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 32 transitions. [2022-03-18 00:45:24,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-03-18 00:45:24,326 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:45:24,326 INFO L500 BasicCegarLoop]: trace histogram [6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:45:24,326 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-03-18 00:45:24,326 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:45:24,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:45:24,327 INFO L85 PathProgramCache]: Analyzing trace with hash -1124027709, now seen corresponding path program 6 times [2022-03-18 00:45:24,327 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:45:24,327 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1173362285] [2022-03-18 00:45:24,453 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-18 00:45:24,454 INFO L85 PathProgramCache]: Analyzing trace with hash -913626736, now seen corresponding path program 1 times [2022-03-18 00:45:24,454 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:45:24,454 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [651950512] [2022-03-18 00:45:24,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:45:24,454 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:45:24,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:45:24,491 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:45:24,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:45:24,502 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:45:24,502 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:45:24,502 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [651950512] [2022-03-18 00:45:24,502 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [651950512] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:45:24,502 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:45:24,502 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-18 00:45:24,606 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:45:24,606 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1173362285] [2022-03-18 00:45:24,606 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1173362285] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:45:24,607 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:45:24,607 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-03-18 00:45:24,607 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [283099929] [2022-03-18 00:45:24,607 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:45:24,607 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-18 00:45:24,608 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:45:24,608 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-18 00:45:24,608 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2022-03-18 00:45:24,608 INFO L87 Difference]: Start difference. First operand 31 states and 32 transitions. Second operand has 10 states, 10 states have (on average 2.5) internal successors, (25), 9 states have internal predecessors, (25), 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) [2022-03-18 00:45:24,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:45:24,738 INFO L93 Difference]: Finished difference Result 43 states and 47 transitions. [2022-03-18 00:45:24,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-18 00:45:24,739 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.5) internal successors, (25), 9 states have internal predecessors, (25), 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 29 [2022-03-18 00:45:24,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:45:24,741 INFO L225 Difference]: With dead ends: 43 [2022-03-18 00:45:24,742 INFO L226 Difference]: Without dead ends: 35 [2022-03-18 00:45:24,742 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 8 SyntacticMatches, 13 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2022-03-18 00:45:24,742 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 25 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 197 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 207 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 197 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 00:45:24,743 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [25 Valid, 49 Invalid, 207 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 197 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 00:45:24,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2022-03-18 00:45:24,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 34. [2022-03-18 00:45:24,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 29 states have (on average 1.0689655172413792) internal successors, (31), 29 states have internal predecessors, (31), 3 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) [2022-03-18 00:45:24,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 35 transitions. [2022-03-18 00:45:24,749 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 35 transitions. Word has length 29 [2022-03-18 00:45:24,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:45:24,751 INFO L478 AbstractCegarLoop]: Abstraction has 34 states and 35 transitions. [2022-03-18 00:45:24,751 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.5) internal successors, (25), 9 states have internal predecessors, (25), 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) [2022-03-18 00:45:24,751 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 35 transitions. [2022-03-18 00:45:24,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-03-18 00:45:24,752 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:45:24,752 INFO L500 BasicCegarLoop]: trace histogram [7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:45:24,752 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-03-18 00:45:24,752 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:45:24,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:45:24,752 INFO L85 PathProgramCache]: Analyzing trace with hash 240354443, now seen corresponding path program 7 times [2022-03-18 00:45:24,752 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:45:24,752 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [672572520] [2022-03-18 00:45:24,874 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-18 00:45:24,874 INFO L85 PathProgramCache]: Analyzing trace with hash -854521392, now seen corresponding path program 1 times [2022-03-18 00:45:24,874 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:45:24,874 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1068923488] [2022-03-18 00:45:24,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:45:24,875 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:45:24,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:45:24,897 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:45:24,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:45:24,900 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:45:24,900 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:45:24,900 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1068923488] [2022-03-18 00:45:24,900 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1068923488] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:45:24,901 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:45:24,901 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-18 00:45:25,020 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:45:25,020 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [672572520] [2022-03-18 00:45:25,020 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [672572520] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:45:25,020 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:45:25,020 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-03-18 00:45:25,021 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1493832569] [2022-03-18 00:45:25,021 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:45:25,021 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-18 00:45:25,021 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:45:25,021 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-18 00:45:25,021 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2022-03-18 00:45:25,022 INFO L87 Difference]: Start difference. First operand 34 states and 35 transitions. Second operand has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 10 states have internal predecessors, (28), 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) [2022-03-18 00:45:25,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:45:25,166 INFO L93 Difference]: Finished difference Result 46 states and 50 transitions. [2022-03-18 00:45:25,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-18 00:45:25,167 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 10 states have internal predecessors, (28), 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 32 [2022-03-18 00:45:25,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:45:25,168 INFO L225 Difference]: With dead ends: 46 [2022-03-18 00:45:25,168 INFO L226 Difference]: Without dead ends: 38 [2022-03-18 00:45:25,169 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 8 SyntacticMatches, 15 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2022-03-18 00:45:25,170 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 27 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 249 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 260 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 249 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 00:45:25,170 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [27 Valid, 54 Invalid, 260 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 249 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 00:45:25,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2022-03-18 00:45:25,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 37. [2022-03-18 00:45:25,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 32 states have (on average 1.0625) internal successors, (34), 32 states have internal predecessors, (34), 3 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) [2022-03-18 00:45:25,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 38 transitions. [2022-03-18 00:45:25,182 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 38 transitions. Word has length 32 [2022-03-18 00:45:25,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:45:25,183 INFO L478 AbstractCegarLoop]: Abstraction has 37 states and 38 transitions. [2022-03-18 00:45:25,183 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 10 states have internal predecessors, (28), 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) [2022-03-18 00:45:25,184 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 38 transitions. [2022-03-18 00:45:25,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-03-18 00:45:25,185 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:45:25,185 INFO L500 BasicCegarLoop]: trace histogram [8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:45:25,186 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-03-18 00:45:25,186 INFO L403 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:45:25,186 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:45:25,186 INFO L85 PathProgramCache]: Analyzing trace with hash -1021444669, now seen corresponding path program 8 times [2022-03-18 00:45:25,186 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:45:25,186 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1025290609] [2022-03-18 00:45:25,310 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-18 00:45:25,311 INFO L85 PathProgramCache]: Analyzing trace with hash -795416048, now seen corresponding path program 1 times [2022-03-18 00:45:25,311 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:45:25,311 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [180309236] [2022-03-18 00:45:25,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:45:25,311 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:45:25,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:45:25,341 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:45:25,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:45:25,346 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:45:25,347 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:45:25,347 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [180309236] [2022-03-18 00:45:25,347 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [180309236] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:45:25,347 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:45:25,347 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-18 00:45:25,474 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:45:25,475 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1025290609] [2022-03-18 00:45:25,475 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1025290609] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:45:25,475 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:45:25,475 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-03-18 00:45:25,475 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [97023335] [2022-03-18 00:45:25,475 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:45:25,475 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-18 00:45:25,475 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:45:25,476 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-18 00:45:25,476 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2022-03-18 00:45:25,476 INFO L87 Difference]: Start difference. First operand 37 states and 38 transitions. Second operand has 12 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 11 states have internal predecessors, (31), 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) [2022-03-18 00:45:25,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:45:25,665 INFO L93 Difference]: Finished difference Result 49 states and 53 transitions. [2022-03-18 00:45:25,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-18 00:45:25,665 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 11 states have internal predecessors, (31), 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 35 [2022-03-18 00:45:25,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:45:25,666 INFO L225 Difference]: With dead ends: 49 [2022-03-18 00:45:25,666 INFO L226 Difference]: Without dead ends: 41 [2022-03-18 00:45:25,666 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 8 SyntacticMatches, 17 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=57, Invalid=363, Unknown=0, NotChecked=0, Total=420 [2022-03-18 00:45:25,667 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 29 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 307 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 319 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 307 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 00:45:25,667 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 59 Invalid, 319 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 307 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 00:45:25,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2022-03-18 00:45:25,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 40. [2022-03-18 00:45:25,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 35 states have (on average 1.0571428571428572) internal successors, (37), 35 states have internal predecessors, (37), 3 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) [2022-03-18 00:45:25,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 41 transitions. [2022-03-18 00:45:25,671 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 41 transitions. Word has length 35 [2022-03-18 00:45:25,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:45:25,671 INFO L478 AbstractCegarLoop]: Abstraction has 40 states and 41 transitions. [2022-03-18 00:45:25,671 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 11 states have internal predecessors, (31), 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) [2022-03-18 00:45:25,672 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 41 transitions. [2022-03-18 00:45:25,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-03-18 00:45:25,672 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:45:25,672 INFO L500 BasicCegarLoop]: trace histogram [9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:45:25,672 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-03-18 00:45:25,672 INFO L403 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:45:25,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:45:25,673 INFO L85 PathProgramCache]: Analyzing trace with hash -1725015669, now seen corresponding path program 9 times [2022-03-18 00:45:25,673 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:45:25,673 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2113331660] [2022-03-18 00:45:25,773 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-18 00:45:25,773 INFO L85 PathProgramCache]: Analyzing trace with hash -736310704, now seen corresponding path program 1 times [2022-03-18 00:45:25,773 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:45:25,773 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1898819590] [2022-03-18 00:45:25,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:45:25,774 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:45:25,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:45:25,807 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:45:25,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:45:25,812 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:45:25,812 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:45:25,812 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1898819590] [2022-03-18 00:45:25,813 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1898819590] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:45:25,813 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:45:25,813 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-18 00:45:25,980 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:45:25,980 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2113331660] [2022-03-18 00:45:25,980 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2113331660] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:45:25,980 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:45:25,981 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-03-18 00:45:25,981 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [531137105] [2022-03-18 00:45:25,981 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:45:25,982 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-18 00:45:25,982 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:45:25,982 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-18 00:45:25,982 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2022-03-18 00:45:25,983 INFO L87 Difference]: Start difference. First operand 40 states and 41 transitions. Second operand has 13 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 12 states have internal predecessors, (34), 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) [2022-03-18 00:45:26,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:45:26,203 INFO L93 Difference]: Finished difference Result 52 states and 56 transitions. [2022-03-18 00:45:26,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-18 00:45:26,204 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 12 states have internal predecessors, (34), 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 38 [2022-03-18 00:45:26,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:45:26,204 INFO L225 Difference]: With dead ends: 52 [2022-03-18 00:45:26,204 INFO L226 Difference]: Without dead ends: 44 [2022-03-18 00:45:26,205 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 8 SyntacticMatches, 19 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=63, Invalid=443, Unknown=0, NotChecked=0, Total=506 [2022-03-18 00:45:26,205 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 31 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 371 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 384 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 371 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 00:45:26,205 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 64 Invalid, 384 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 371 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 00:45:26,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2022-03-18 00:45:26,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 43. [2022-03-18 00:45:26,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 38 states have (on average 1.0526315789473684) internal successors, (40), 38 states have internal predecessors, (40), 3 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) [2022-03-18 00:45:26,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 44 transitions. [2022-03-18 00:45:26,210 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 44 transitions. Word has length 38 [2022-03-18 00:45:26,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:45:26,210 INFO L478 AbstractCegarLoop]: Abstraction has 43 states and 44 transitions. [2022-03-18 00:45:26,210 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 12 states have internal predecessors, (34), 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) [2022-03-18 00:45:26,210 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 44 transitions. [2022-03-18 00:45:26,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-03-18 00:45:26,211 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:45:26,211 INFO L500 BasicCegarLoop]: trace histogram [10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:45:26,211 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-03-18 00:45:26,211 INFO L403 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:45:26,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:45:26,211 INFO L85 PathProgramCache]: Analyzing trace with hash 1926695107, now seen corresponding path program 10 times [2022-03-18 00:45:26,211 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:45:26,212 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [459061818] [2022-03-18 00:45:26,351 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-18 00:45:26,352 INFO L85 PathProgramCache]: Analyzing trace with hash -677205360, now seen corresponding path program 1 times [2022-03-18 00:45:26,353 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:45:26,353 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2047867023] [2022-03-18 00:45:26,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:45:26,353 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:45:26,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:45:26,380 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:45:26,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:45:26,383 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:45:26,383 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:45:26,384 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2047867023] [2022-03-18 00:45:26,384 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2047867023] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:45:26,384 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:45:26,384 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-18 00:45:26,560 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:45:26,560 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [459061818] [2022-03-18 00:45:26,560 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [459061818] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:45:26,560 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:45:26,560 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-03-18 00:45:26,560 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1760449474] [2022-03-18 00:45:26,560 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:45:26,561 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-18 00:45:26,561 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:45:26,561 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-18 00:45:26,561 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=157, Unknown=0, NotChecked=0, Total=182 [2022-03-18 00:45:26,561 INFO L87 Difference]: Start difference. First operand 43 states and 44 transitions. Second operand has 14 states, 14 states have (on average 2.642857142857143) internal successors, (37), 13 states have internal predecessors, (37), 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) [2022-03-18 00:45:26,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:45:26,801 INFO L93 Difference]: Finished difference Result 55 states and 59 transitions. [2022-03-18 00:45:26,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-18 00:45:26,802 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.642857142857143) internal successors, (37), 13 states have internal predecessors, (37), 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 41 [2022-03-18 00:45:26,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:45:26,802 INFO L225 Difference]: With dead ends: 55 [2022-03-18 00:45:26,802 INFO L226 Difference]: Without dead ends: 47 [2022-03-18 00:45:26,803 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 8 SyntacticMatches, 21 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=69, Invalid=531, Unknown=0, NotChecked=0, Total=600 [2022-03-18 00:45:26,803 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 33 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 441 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 455 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 441 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 00:45:26,803 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [33 Valid, 69 Invalid, 455 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 441 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 00:45:26,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2022-03-18 00:45:26,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 46. [2022-03-18 00:45:26,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 41 states have (on average 1.048780487804878) internal successors, (43), 41 states have internal predecessors, (43), 3 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) [2022-03-18 00:45:26,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 47 transitions. [2022-03-18 00:45:26,808 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 47 transitions. Word has length 41 [2022-03-18 00:45:26,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:45:26,808 INFO L478 AbstractCegarLoop]: Abstraction has 46 states and 47 transitions. [2022-03-18 00:45:26,808 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.642857142857143) internal successors, (37), 13 states have internal predecessors, (37), 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) [2022-03-18 00:45:26,808 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 47 transitions. [2022-03-18 00:45:26,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-03-18 00:45:26,809 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:45:26,809 INFO L500 BasicCegarLoop]: trace histogram [11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:45:26,809 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-03-18 00:45:26,809 INFO L403 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:45:26,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:45:26,809 INFO L85 PathProgramCache]: Analyzing trace with hash -1479184757, now seen corresponding path program 11 times [2022-03-18 00:45:26,809 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:45:26,809 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1917185444] [2022-03-18 00:45:26,929 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-18 00:45:26,929 INFO L85 PathProgramCache]: Analyzing trace with hash -618100016, now seen corresponding path program 1 times [2022-03-18 00:45:26,929 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:45:26,930 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [531149414] [2022-03-18 00:45:26,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:45:26,930 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:45:26,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:45:26,944 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:45:26,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:45:26,947 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:45:26,948 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:45:26,948 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [531149414] [2022-03-18 00:45:26,948 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [531149414] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:45:26,948 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:45:26,948 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-18 00:45:27,154 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:45:27,155 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1917185444] [2022-03-18 00:45:27,155 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1917185444] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:45:27,155 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:45:27,155 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-03-18 00:45:27,155 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [231277316] [2022-03-18 00:45:27,155 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:45:27,155 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-18 00:45:27,155 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:45:27,156 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-18 00:45:27,156 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=183, Unknown=0, NotChecked=0, Total=210 [2022-03-18 00:45:27,156 INFO L87 Difference]: Start difference. First operand 46 states and 47 transitions. Second operand has 15 states, 15 states have (on average 2.6666666666666665) internal successors, (40), 14 states have internal predecessors, (40), 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) [2022-03-18 00:45:27,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:45:27,469 INFO L93 Difference]: Finished difference Result 58 states and 62 transitions. [2022-03-18 00:45:27,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-18 00:45:27,469 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.6666666666666665) internal successors, (40), 14 states have internal predecessors, (40), 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 44 [2022-03-18 00:45:27,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:45:27,470 INFO L225 Difference]: With dead ends: 58 [2022-03-18 00:45:27,470 INFO L226 Difference]: Without dead ends: 50 [2022-03-18 00:45:27,471 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 8 SyntacticMatches, 23 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=75, Invalid=627, Unknown=0, NotChecked=0, Total=702 [2022-03-18 00:45:27,471 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 35 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 517 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 532 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 517 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-18 00:45:27,471 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [35 Valid, 74 Invalid, 532 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 517 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-18 00:45:27,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2022-03-18 00:45:27,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 49. [2022-03-18 00:45:27,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 44 states have (on average 1.0454545454545454) internal successors, (46), 44 states have internal predecessors, (46), 3 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) [2022-03-18 00:45:27,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 50 transitions. [2022-03-18 00:45:27,478 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 50 transitions. Word has length 44 [2022-03-18 00:45:27,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:45:27,478 INFO L478 AbstractCegarLoop]: Abstraction has 49 states and 50 transitions. [2022-03-18 00:45:27,478 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.6666666666666665) internal successors, (40), 14 states have internal predecessors, (40), 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) [2022-03-18 00:45:27,478 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 50 transitions. [2022-03-18 00:45:27,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-03-18 00:45:27,479 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:45:27,479 INFO L500 BasicCegarLoop]: trace histogram [12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:45:27,479 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-03-18 00:45:27,479 INFO L403 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:45:27,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:45:27,479 INFO L85 PathProgramCache]: Analyzing trace with hash -1738812477, now seen corresponding path program 12 times [2022-03-18 00:45:27,480 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:45:27,480 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1212171067] [2022-03-18 00:45:27,597 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-18 00:45:27,598 INFO L85 PathProgramCache]: Analyzing trace with hash -558994672, now seen corresponding path program 1 times [2022-03-18 00:45:27,598 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:45:27,598 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1162875143] [2022-03-18 00:45:27,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:45:27,598 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:45:27,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:45:27,617 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:45:27,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:45:27,620 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:45:27,620 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:45:27,620 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1162875143] [2022-03-18 00:45:27,620 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1162875143] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:45:27,620 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:45:27,620 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-18 00:45:27,876 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:45:27,876 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1212171067] [2022-03-18 00:45:27,876 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1212171067] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:45:27,876 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:45:27,876 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-03-18 00:45:27,877 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [501423662] [2022-03-18 00:45:27,877 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:45:27,877 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-18 00:45:27,877 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:45:27,877 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-18 00:45:27,877 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=211, Unknown=0, NotChecked=0, Total=240 [2022-03-18 00:45:27,877 INFO L87 Difference]: Start difference. First operand 49 states and 50 transitions. Second operand has 16 states, 16 states have (on average 2.6875) internal successors, (43), 15 states have internal predecessors, (43), 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) [2022-03-18 00:45:28,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:45:28,194 INFO L93 Difference]: Finished difference Result 61 states and 65 transitions. [2022-03-18 00:45:28,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-18 00:45:28,194 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 15 states have internal predecessors, (43), 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 47 [2022-03-18 00:45:28,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:45:28,194 INFO L225 Difference]: With dead ends: 61 [2022-03-18 00:45:28,194 INFO L226 Difference]: Without dead ends: 53 [2022-03-18 00:45:28,195 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 8 SyntacticMatches, 25 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=81, Invalid=731, Unknown=0, NotChecked=0, Total=812 [2022-03-18 00:45:28,195 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 37 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 599 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 79 SdHoareTripleChecker+Invalid, 615 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 599 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-18 00:45:28,195 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [37 Valid, 79 Invalid, 615 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 599 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-18 00:45:28,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2022-03-18 00:45:28,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 52. [2022-03-18 00:45:28,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 47 states have (on average 1.0425531914893618) internal successors, (49), 47 states have internal predecessors, (49), 3 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) [2022-03-18 00:45:28,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 53 transitions. [2022-03-18 00:45:28,200 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 53 transitions. Word has length 47 [2022-03-18 00:45:28,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:45:28,200 INFO L478 AbstractCegarLoop]: Abstraction has 52 states and 53 transitions. [2022-03-18 00:45:28,201 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 15 states have internal predecessors, (43), 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) [2022-03-18 00:45:28,201 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 53 transitions. [2022-03-18 00:45:28,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-03-18 00:45:28,201 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:45:28,201 INFO L500 BasicCegarLoop]: trace histogram [13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:45:28,201 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-03-18 00:45:28,201 INFO L403 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:45:28,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:45:28,202 INFO L85 PathProgramCache]: Analyzing trace with hash -1072118901, now seen corresponding path program 13 times [2022-03-18 00:45:28,202 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:45:28,202 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [303201397] [2022-03-18 00:45:28,326 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-18 00:45:28,327 INFO L85 PathProgramCache]: Analyzing trace with hash -499889328, now seen corresponding path program 1 times [2022-03-18 00:45:28,327 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:45:28,327 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [281141674] [2022-03-18 00:45:28,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:45:28,327 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:45:28,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:45:28,345 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:45:28,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:45:28,350 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:45:28,350 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:45:28,350 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [281141674] [2022-03-18 00:45:28,350 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [281141674] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:45:28,350 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:45:28,350 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-18 00:45:28,617 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:45:28,617 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [303201397] [2022-03-18 00:45:28,617 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [303201397] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:45:28,617 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:45:28,617 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-03-18 00:45:28,617 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [409748524] [2022-03-18 00:45:28,617 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:45:28,618 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-18 00:45:28,618 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:45:28,618 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-18 00:45:28,618 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=241, Unknown=0, NotChecked=0, Total=272 [2022-03-18 00:45:28,618 INFO L87 Difference]: Start difference. First operand 52 states and 53 transitions. Second operand has 17 states, 17 states have (on average 2.7058823529411766) internal successors, (46), 16 states have internal predecessors, (46), 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) [2022-03-18 00:45:28,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:45:28,955 INFO L93 Difference]: Finished difference Result 64 states and 68 transitions. [2022-03-18 00:45:28,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-18 00:45:28,956 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.7058823529411766) internal successors, (46), 16 states have internal predecessors, (46), 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 50 [2022-03-18 00:45:28,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:45:28,956 INFO L225 Difference]: With dead ends: 64 [2022-03-18 00:45:28,956 INFO L226 Difference]: Without dead ends: 56 [2022-03-18 00:45:28,956 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 8 SyntacticMatches, 27 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=87, Invalid=843, Unknown=0, NotChecked=0, Total=930 [2022-03-18 00:45:28,957 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 39 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 687 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 704 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 687 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-18 00:45:28,957 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 84 Invalid, 704 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 687 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-18 00:45:28,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2022-03-18 00:45:28,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 55. [2022-03-18 00:45:28,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 50 states have (on average 1.04) internal successors, (52), 50 states have internal predecessors, (52), 3 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) [2022-03-18 00:45:28,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 56 transitions. [2022-03-18 00:45:28,961 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 56 transitions. Word has length 50 [2022-03-18 00:45:28,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:45:28,962 INFO L478 AbstractCegarLoop]: Abstraction has 55 states and 56 transitions. [2022-03-18 00:45:28,962 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.7058823529411766) internal successors, (46), 16 states have internal predecessors, (46), 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) [2022-03-18 00:45:28,962 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 56 transitions. [2022-03-18 00:45:28,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-03-18 00:45:28,962 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:45:28,962 INFO L500 BasicCegarLoop]: trace histogram [14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:45:28,962 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-03-18 00:45:28,962 INFO L403 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:45:28,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:45:28,963 INFO L85 PathProgramCache]: Analyzing trace with hash 467427011, now seen corresponding path program 14 times [2022-03-18 00:45:28,963 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:45:28,963 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1354760832] [2022-03-18 00:45:29,045 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-18 00:45:29,045 INFO L85 PathProgramCache]: Analyzing trace with hash -440783984, now seen corresponding path program 1 times [2022-03-18 00:45:29,046 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:45:29,046 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2016022101] [2022-03-18 00:45:29,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:45:29,046 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:45:29,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:45:29,063 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:45:29,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:45:29,066 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:45:29,066 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:45:29,066 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2016022101] [2022-03-18 00:45:29,066 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2016022101] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:45:29,066 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:45:29,066 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-18 00:45:29,366 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:45:29,366 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1354760832] [2022-03-18 00:45:29,366 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1354760832] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:45:29,366 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:45:29,366 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-03-18 00:45:29,366 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1477121863] [2022-03-18 00:45:29,366 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:45:29,366 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-18 00:45:29,367 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:45:29,367 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-18 00:45:29,367 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=273, Unknown=0, NotChecked=0, Total=306 [2022-03-18 00:45:29,367 INFO L87 Difference]: Start difference. First operand 55 states and 56 transitions. Second operand has 18 states, 18 states have (on average 2.7222222222222223) internal successors, (49), 17 states have internal predecessors, (49), 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) [2022-03-18 00:45:29,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:45:29,749 INFO L93 Difference]: Finished difference Result 67 states and 71 transitions. [2022-03-18 00:45:29,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-03-18 00:45:29,749 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.7222222222222223) internal successors, (49), 17 states have internal predecessors, (49), 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 53 [2022-03-18 00:45:29,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:45:29,750 INFO L225 Difference]: With dead ends: 67 [2022-03-18 00:45:29,750 INFO L226 Difference]: Without dead ends: 59 [2022-03-18 00:45:29,750 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 8 SyntacticMatches, 29 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=93, Invalid=963, Unknown=0, NotChecked=0, Total=1056 [2022-03-18 00:45:29,751 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 41 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 781 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 89 SdHoareTripleChecker+Invalid, 799 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 781 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-18 00:45:29,751 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [41 Valid, 89 Invalid, 799 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 781 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-18 00:45:29,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2022-03-18 00:45:29,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 58. [2022-03-18 00:45:29,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 53 states have (on average 1.0377358490566038) internal successors, (55), 53 states have internal predecessors, (55), 3 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) [2022-03-18 00:45:29,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 59 transitions. [2022-03-18 00:45:29,756 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 59 transitions. Word has length 53 [2022-03-18 00:45:29,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:45:29,756 INFO L478 AbstractCegarLoop]: Abstraction has 58 states and 59 transitions. [2022-03-18 00:45:29,756 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.7222222222222223) internal successors, (49), 17 states have internal predecessors, (49), 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) [2022-03-18 00:45:29,756 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 59 transitions. [2022-03-18 00:45:29,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-03-18 00:45:29,756 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:45:29,757 INFO L500 BasicCegarLoop]: trace histogram [15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:45:29,757 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-03-18 00:45:29,757 INFO L403 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:45:29,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:45:29,757 INFO L85 PathProgramCache]: Analyzing trace with hash -876062581, now seen corresponding path program 15 times [2022-03-18 00:45:29,757 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:45:29,757 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1744439978] [2022-03-18 00:45:29,868 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-18 00:45:29,869 INFO L85 PathProgramCache]: Analyzing trace with hash -381678640, now seen corresponding path program 1 times [2022-03-18 00:45:29,869 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:45:29,869 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1610409328] [2022-03-18 00:45:29,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:45:29,869 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:45:29,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:45:29,891 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:45:29,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:45:29,894 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:45:29,894 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:45:29,895 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1610409328] [2022-03-18 00:45:29,895 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1610409328] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:45:29,895 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:45:29,895 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-18 00:45:30,220 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:45:30,221 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1744439978] [2022-03-18 00:45:30,221 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1744439978] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:45:30,221 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:45:30,221 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-03-18 00:45:30,221 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [740231773] [2022-03-18 00:45:30,221 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:45:30,221 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-18 00:45:30,221 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:45:30,221 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-18 00:45:30,222 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=307, Unknown=0, NotChecked=0, Total=342 [2022-03-18 00:45:30,222 INFO L87 Difference]: Start difference. First operand 58 states and 59 transitions. Second operand has 19 states, 19 states have (on average 2.736842105263158) internal successors, (52), 18 states have internal predecessors, (52), 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) [2022-03-18 00:45:30,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:45:30,630 INFO L93 Difference]: Finished difference Result 70 states and 74 transitions. [2022-03-18 00:45:30,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-03-18 00:45:30,630 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.736842105263158) internal successors, (52), 18 states have internal predecessors, (52), 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 56 [2022-03-18 00:45:30,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:45:30,631 INFO L225 Difference]: With dead ends: 70 [2022-03-18 00:45:30,631 INFO L226 Difference]: Without dead ends: 62 [2022-03-18 00:45:30,631 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 8 SyntacticMatches, 31 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=99, Invalid=1091, Unknown=0, NotChecked=0, Total=1190 [2022-03-18 00:45:30,631 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 43 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 881 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 94 SdHoareTripleChecker+Invalid, 900 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 881 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-18 00:45:30,632 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [43 Valid, 94 Invalid, 900 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 881 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-18 00:45:30,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2022-03-18 00:45:30,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 61. [2022-03-18 00:45:30,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 56 states have (on average 1.0357142857142858) internal successors, (58), 56 states have internal predecessors, (58), 3 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) [2022-03-18 00:45:30,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 62 transitions. [2022-03-18 00:45:30,636 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 62 transitions. Word has length 56 [2022-03-18 00:45:30,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:45:30,637 INFO L478 AbstractCegarLoop]: Abstraction has 61 states and 62 transitions. [2022-03-18 00:45:30,637 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.736842105263158) internal successors, (52), 18 states have internal predecessors, (52), 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) [2022-03-18 00:45:30,637 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 62 transitions. [2022-03-18 00:45:30,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-03-18 00:45:30,637 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:45:30,637 INFO L500 BasicCegarLoop]: trace histogram [16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:45:30,638 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-03-18 00:45:30,638 INFO L403 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:45:30,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:45:30,638 INFO L85 PathProgramCache]: Analyzing trace with hash 25733571, now seen corresponding path program 16 times [2022-03-18 00:45:30,638 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:45:30,638 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [704837792] [2022-03-18 00:45:30,757 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-18 00:45:30,757 INFO L85 PathProgramCache]: Analyzing trace with hash -322573296, now seen corresponding path program 1 times [2022-03-18 00:45:30,757 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:45:30,757 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1908412901] [2022-03-18 00:45:30,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:45:30,757 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:45:30,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:45:30,772 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:45:30,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:45:30,775 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:45:30,775 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:45:30,776 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1908412901] [2022-03-18 00:45:30,776 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1908412901] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:45:30,776 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:45:30,776 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-18 00:45:31,135 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:45:31,135 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [704837792] [2022-03-18 00:45:31,135 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [704837792] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:45:31,135 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:45:31,135 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-03-18 00:45:31,136 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2121628814] [2022-03-18 00:45:31,136 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:45:31,136 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-18 00:45:31,136 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:45:31,136 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-18 00:45:31,136 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=343, Unknown=0, NotChecked=0, Total=380 [2022-03-18 00:45:31,136 INFO L87 Difference]: Start difference. First operand 61 states and 62 transitions. Second operand has 20 states, 20 states have (on average 2.75) internal successors, (55), 19 states have internal predecessors, (55), 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) [2022-03-18 00:45:31,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:45:31,599 INFO L93 Difference]: Finished difference Result 73 states and 77 transitions. [2022-03-18 00:45:31,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-03-18 00:45:31,599 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.75) internal successors, (55), 19 states have internal predecessors, (55), 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 59 [2022-03-18 00:45:31,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:45:31,600 INFO L225 Difference]: With dead ends: 73 [2022-03-18 00:45:31,600 INFO L226 Difference]: Without dead ends: 65 [2022-03-18 00:45:31,600 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 8 SyntacticMatches, 33 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=105, Invalid=1227, Unknown=0, NotChecked=0, Total=1332 [2022-03-18 00:45:31,601 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 45 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 987 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 99 SdHoareTripleChecker+Invalid, 1007 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 987 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-18 00:45:31,601 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [45 Valid, 99 Invalid, 1007 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 987 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-18 00:45:31,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2022-03-18 00:45:31,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 64. [2022-03-18 00:45:31,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 59 states have (on average 1.0338983050847457) internal successors, (61), 59 states have internal predecessors, (61), 3 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) [2022-03-18 00:45:31,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 65 transitions. [2022-03-18 00:45:31,614 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 65 transitions. Word has length 59 [2022-03-18 00:45:31,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:45:31,614 INFO L478 AbstractCegarLoop]: Abstraction has 64 states and 65 transitions. [2022-03-18 00:45:31,614 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.75) internal successors, (55), 19 states have internal predecessors, (55), 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) [2022-03-18 00:45:31,614 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 65 transitions. [2022-03-18 00:45:31,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-03-18 00:45:31,615 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:45:31,615 INFO L500 BasicCegarLoop]: trace histogram [17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:45:31,615 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-03-18 00:45:31,615 INFO L403 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:45:31,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:45:31,616 INFO L85 PathProgramCache]: Analyzing trace with hash 414461323, now seen corresponding path program 17 times [2022-03-18 00:45:31,616 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:45:31,616 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1784131616] [2022-03-18 00:45:31,754 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-18 00:45:31,754 INFO L85 PathProgramCache]: Analyzing trace with hash -263467952, now seen corresponding path program 1 times [2022-03-18 00:45:31,754 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:45:31,754 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1384045567] [2022-03-18 00:45:31,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:45:31,754 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:45:31,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:45:31,774 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:45:31,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:45:31,777 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:45:31,777 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:45:31,777 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1384045567] [2022-03-18 00:45:31,777 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1384045567] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:45:31,777 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:45:31,777 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-18 00:45:32,168 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:45:32,168 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1784131616] [2022-03-18 00:45:32,168 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1784131616] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:45:32,168 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:45:32,168 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2022-03-18 00:45:32,168 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2033333756] [2022-03-18 00:45:32,168 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:45:32,169 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-18 00:45:32,169 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:45:32,169 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-18 00:45:32,169 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=381, Unknown=0, NotChecked=0, Total=420 [2022-03-18 00:45:32,170 INFO L87 Difference]: Start difference. First operand 64 states and 65 transitions. Second operand has 21 states, 21 states have (on average 2.761904761904762) internal successors, (58), 20 states have internal predecessors, (58), 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) [2022-03-18 00:45:32,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:45:32,711 INFO L93 Difference]: Finished difference Result 76 states and 80 transitions. [2022-03-18 00:45:32,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-03-18 00:45:32,712 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.761904761904762) internal successors, (58), 20 states have internal predecessors, (58), 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 62 [2022-03-18 00:45:32,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:45:32,712 INFO L225 Difference]: With dead ends: 76 [2022-03-18 00:45:32,712 INFO L226 Difference]: Without dead ends: 68 [2022-03-18 00:45:32,713 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 8 SyntacticMatches, 35 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=111, Invalid=1371, Unknown=0, NotChecked=0, Total=1482 [2022-03-18 00:45:32,713 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 47 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 1099 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 104 SdHoareTripleChecker+Invalid, 1120 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 1099 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-18 00:45:32,713 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [47 Valid, 104 Invalid, 1120 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 1099 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-18 00:45:32,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2022-03-18 00:45:32,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 67. [2022-03-18 00:45:32,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 62 states have (on average 1.032258064516129) internal successors, (64), 62 states have internal predecessors, (64), 3 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) [2022-03-18 00:45:32,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 68 transitions. [2022-03-18 00:45:32,720 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 68 transitions. Word has length 62 [2022-03-18 00:45:32,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:45:32,720 INFO L478 AbstractCegarLoop]: Abstraction has 67 states and 68 transitions. [2022-03-18 00:45:32,720 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.761904761904762) internal successors, (58), 20 states have internal predecessors, (58), 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) [2022-03-18 00:45:32,720 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 68 transitions. [2022-03-18 00:45:32,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-03-18 00:45:32,721 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:45:32,721 INFO L500 BasicCegarLoop]: trace histogram [18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:45:32,721 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-03-18 00:45:32,721 INFO L403 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:45:32,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:45:32,722 INFO L85 PathProgramCache]: Analyzing trace with hash 1771091139, now seen corresponding path program 18 times [2022-03-18 00:45:32,722 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:45:32,722 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1119098493] [2022-03-18 00:45:32,841 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-18 00:45:32,842 INFO L85 PathProgramCache]: Analyzing trace with hash -204362608, now seen corresponding path program 1 times [2022-03-18 00:45:32,842 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:45:32,842 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1515839187] [2022-03-18 00:45:32,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:45:32,842 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:45:32,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:45:32,857 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:45:32,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:45:32,861 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:45:32,862 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:45:32,862 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1515839187] [2022-03-18 00:45:32,862 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1515839187] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:45:32,862 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:45:32,862 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-18 00:45:33,335 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:45:33,336 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1119098493] [2022-03-18 00:45:33,336 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1119098493] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:45:33,336 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:45:33,336 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2022-03-18 00:45:33,336 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [513559165] [2022-03-18 00:45:33,336 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:45:33,336 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-18 00:45:33,336 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:45:33,336 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-18 00:45:33,337 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=421, Unknown=0, NotChecked=0, Total=462 [2022-03-18 00:45:33,337 INFO L87 Difference]: Start difference. First operand 67 states and 68 transitions. Second operand has 22 states, 22 states have (on average 2.772727272727273) internal successors, (61), 21 states have internal predecessors, (61), 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) [2022-03-18 00:45:33,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:45:33,923 INFO L93 Difference]: Finished difference Result 79 states and 83 transitions. [2022-03-18 00:45:33,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-03-18 00:45:33,924 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.772727272727273) internal successors, (61), 21 states have internal predecessors, (61), 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 65 [2022-03-18 00:45:33,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:45:33,924 INFO L225 Difference]: With dead ends: 79 [2022-03-18 00:45:33,924 INFO L226 Difference]: Without dead ends: 71 [2022-03-18 00:45:33,925 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 8 SyntacticMatches, 37 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 171 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=117, Invalid=1523, Unknown=0, NotChecked=0, Total=1640 [2022-03-18 00:45:33,925 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 49 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 1217 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 109 SdHoareTripleChecker+Invalid, 1239 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 1217 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-18 00:45:33,925 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [49 Valid, 109 Invalid, 1239 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 1217 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-18 00:45:33,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2022-03-18 00:45:33,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 70. [2022-03-18 00:45:33,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 65 states have (on average 1.0307692307692307) internal successors, (67), 65 states have internal predecessors, (67), 3 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) [2022-03-18 00:45:33,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 71 transitions. [2022-03-18 00:45:33,931 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 71 transitions. Word has length 65 [2022-03-18 00:45:33,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:45:33,931 INFO L478 AbstractCegarLoop]: Abstraction has 70 states and 71 transitions. [2022-03-18 00:45:33,931 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.772727272727273) internal successors, (61), 21 states have internal predecessors, (61), 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) [2022-03-18 00:45:33,931 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 71 transitions. [2022-03-18 00:45:33,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-03-18 00:45:33,932 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:45:33,932 INFO L500 BasicCegarLoop]: trace histogram [19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:45:33,932 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-03-18 00:45:33,932 INFO L403 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:45:33,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:45:33,932 INFO L85 PathProgramCache]: Analyzing trace with hash 1487684235, now seen corresponding path program 19 times [2022-03-18 00:45:33,933 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:45:33,933 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1403363170] [2022-03-18 00:45:34,057 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-18 00:45:34,057 INFO L85 PathProgramCache]: Analyzing trace with hash -145257264, now seen corresponding path program 1 times [2022-03-18 00:45:34,057 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:45:34,057 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [645207853] [2022-03-18 00:45:34,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:45:34,057 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:45:34,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:45:34,073 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:45:34,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:45:34,075 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:45:34,075 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:45:34,075 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [645207853] [2022-03-18 00:45:34,076 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [645207853] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:45:34,076 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:45:34,076 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-18 00:45:34,527 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:45:34,527 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1403363170] [2022-03-18 00:45:34,527 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1403363170] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:45:34,528 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:45:34,528 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2022-03-18 00:45:34,528 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [265886747] [2022-03-18 00:45:34,528 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:45:34,528 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-03-18 00:45:34,528 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:45:34,528 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-03-18 00:45:34,528 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=463, Unknown=0, NotChecked=0, Total=506 [2022-03-18 00:45:34,529 INFO L87 Difference]: Start difference. First operand 70 states and 71 transitions. Second operand has 23 states, 23 states have (on average 2.782608695652174) internal successors, (64), 22 states have internal predecessors, (64), 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) [2022-03-18 00:45:35,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:45:35,110 INFO L93 Difference]: Finished difference Result 82 states and 86 transitions. [2022-03-18 00:45:35,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-03-18 00:45:35,111 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.782608695652174) internal successors, (64), 22 states have internal predecessors, (64), 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 68 [2022-03-18 00:45:35,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:45:35,111 INFO L225 Difference]: With dead ends: 82 [2022-03-18 00:45:35,111 INFO L226 Difference]: Without dead ends: 74 [2022-03-18 00:45:35,112 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 8 SyntacticMatches, 39 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=123, Invalid=1683, Unknown=0, NotChecked=0, Total=1806 [2022-03-18 00:45:35,112 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 51 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 1341 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 114 SdHoareTripleChecker+Invalid, 1364 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 1341 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-18 00:45:35,112 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [51 Valid, 114 Invalid, 1364 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 1341 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-18 00:45:35,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2022-03-18 00:45:35,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 73. [2022-03-18 00:45:35,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 68 states have (on average 1.0294117647058822) internal successors, (70), 68 states have internal predecessors, (70), 3 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) [2022-03-18 00:45:35,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 74 transitions. [2022-03-18 00:45:35,119 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 74 transitions. Word has length 68 [2022-03-18 00:45:35,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:45:35,119 INFO L478 AbstractCegarLoop]: Abstraction has 73 states and 74 transitions. [2022-03-18 00:45:35,119 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.782608695652174) internal successors, (64), 22 states have internal predecessors, (64), 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) [2022-03-18 00:45:35,119 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 74 transitions. [2022-03-18 00:45:35,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-03-18 00:45:35,120 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:45:35,120 INFO L500 BasicCegarLoop]: trace histogram [20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:45:35,120 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2022-03-18 00:45:35,120 INFO L403 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:45:35,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:45:35,120 INFO L85 PathProgramCache]: Analyzing trace with hash -1876656189, now seen corresponding path program 20 times [2022-03-18 00:45:35,121 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:45:35,121 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [67232286] [2022-03-18 00:45:35,238 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-18 00:45:35,239 INFO L85 PathProgramCache]: Analyzing trace with hash -86151920, now seen corresponding path program 1 times [2022-03-18 00:45:35,239 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:45:35,239 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1361513329] [2022-03-18 00:45:35,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:45:35,239 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:45:35,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:45:35,256 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:45:35,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:45:35,260 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:45:35,260 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:45:35,260 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1361513329] [2022-03-18 00:45:35,260 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1361513329] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:45:35,260 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:45:35,261 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-18 00:45:35,756 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:45:35,756 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [67232286] [2022-03-18 00:45:35,756 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [67232286] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:45:35,756 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:45:35,756 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2022-03-18 00:45:35,756 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1450872377] [2022-03-18 00:45:35,756 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:45:35,757 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-18 00:45:35,757 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:45:35,757 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-18 00:45:35,757 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=507, Unknown=0, NotChecked=0, Total=552 [2022-03-18 00:45:35,757 INFO L87 Difference]: Start difference. First operand 73 states and 74 transitions. Second operand has 24 states, 24 states have (on average 2.7916666666666665) internal successors, (67), 23 states have internal predecessors, (67), 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) [2022-03-18 00:45:36,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:45:36,372 INFO L93 Difference]: Finished difference Result 85 states and 89 transitions. [2022-03-18 00:45:36,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-03-18 00:45:36,374 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.7916666666666665) internal successors, (67), 23 states have internal predecessors, (67), 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 71 [2022-03-18 00:45:36,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:45:36,375 INFO L225 Difference]: With dead ends: 85 [2022-03-18 00:45:36,375 INFO L226 Difference]: Without dead ends: 77 [2022-03-18 00:45:36,375 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 8 SyntacticMatches, 41 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 210 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=129, Invalid=1851, Unknown=0, NotChecked=0, Total=1980 [2022-03-18 00:45:36,376 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 53 mSDsluCounter, 107 mSDsCounter, 0 mSdLazyCounter, 1471 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 119 SdHoareTripleChecker+Invalid, 1495 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 1471 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-18 00:45:36,376 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [53 Valid, 119 Invalid, 1495 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 1471 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-18 00:45:36,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2022-03-18 00:45:36,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 76. [2022-03-18 00:45:36,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 71 states have (on average 1.028169014084507) internal successors, (73), 71 states have internal predecessors, (73), 3 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) [2022-03-18 00:45:36,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 77 transitions. [2022-03-18 00:45:36,382 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 77 transitions. Word has length 71 [2022-03-18 00:45:36,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:45:36,383 INFO L478 AbstractCegarLoop]: Abstraction has 76 states and 77 transitions. [2022-03-18 00:45:36,383 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.7916666666666665) internal successors, (67), 23 states have internal predecessors, (67), 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) [2022-03-18 00:45:36,383 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 77 transitions. [2022-03-18 00:45:36,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-03-18 00:45:36,383 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:45:36,383 INFO L500 BasicCegarLoop]: trace histogram [21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:45:36,383 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2022-03-18 00:45:36,383 INFO L403 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:45:36,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:45:36,384 INFO L85 PathProgramCache]: Analyzing trace with hash -1585408117, now seen corresponding path program 21 times [2022-03-18 00:45:36,384 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:45:36,384 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [286099372] [2022-03-18 00:45:36,496 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-18 00:45:36,496 INFO L85 PathProgramCache]: Analyzing trace with hash -27046576, now seen corresponding path program 1 times [2022-03-18 00:45:36,496 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:45:36,496 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2062832826] [2022-03-18 00:45:36,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:45:36,496 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:45:36,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:45:36,511 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:45:36,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:45:36,520 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:45:36,520 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:45:36,520 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2062832826] [2022-03-18 00:45:36,520 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2062832826] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:45:36,520 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:45:36,520 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-18 00:45:37,064 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:45:37,065 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [286099372] [2022-03-18 00:45:37,065 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [286099372] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:45:37,065 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:45:37,065 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2022-03-18 00:45:37,065 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1594886921] [2022-03-18 00:45:37,065 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:45:37,065 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-18 00:45:37,065 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:45:37,065 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-18 00:45:37,066 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=553, Unknown=0, NotChecked=0, Total=600 [2022-03-18 00:45:37,066 INFO L87 Difference]: Start difference. First operand 76 states and 77 transitions. Second operand has 25 states, 25 states have (on average 2.8) internal successors, (70), 24 states have internal predecessors, (70), 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) [2022-03-18 00:45:37,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:45:37,731 INFO L93 Difference]: Finished difference Result 88 states and 92 transitions. [2022-03-18 00:45:37,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-03-18 00:45:37,731 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.8) internal successors, (70), 24 states have internal predecessors, (70), 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 74 [2022-03-18 00:45:37,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:45:37,731 INFO L225 Difference]: With dead ends: 88 [2022-03-18 00:45:37,731 INFO L226 Difference]: Without dead ends: 80 [2022-03-18 00:45:37,732 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 8 SyntacticMatches, 43 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 231 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=135, Invalid=2027, Unknown=0, NotChecked=0, Total=2162 [2022-03-18 00:45:37,732 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 55 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 1607 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 124 SdHoareTripleChecker+Invalid, 1632 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 1607 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-18 00:45:37,733 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [55 Valid, 124 Invalid, 1632 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 1607 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-18 00:45:37,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2022-03-18 00:45:37,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 79. [2022-03-18 00:45:37,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 74 states have (on average 1.027027027027027) internal successors, (76), 74 states have internal predecessors, (76), 3 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) [2022-03-18 00:45:37,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 80 transitions. [2022-03-18 00:45:37,739 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 80 transitions. Word has length 74 [2022-03-18 00:45:37,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:45:37,739 INFO L478 AbstractCegarLoop]: Abstraction has 79 states and 80 transitions. [2022-03-18 00:45:37,739 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.8) internal successors, (70), 24 states have internal predecessors, (70), 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) [2022-03-18 00:45:37,739 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 80 transitions. [2022-03-18 00:45:37,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2022-03-18 00:45:37,739 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:45:37,739 INFO L500 BasicCegarLoop]: trace histogram [22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:45:37,740 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2022-03-18 00:45:37,740 INFO L403 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:45:37,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:45:37,740 INFO L85 PathProgramCache]: Analyzing trace with hash -848033085, now seen corresponding path program 22 times [2022-03-18 00:45:37,740 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:45:37,740 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2097559230] [2022-03-18 00:45:37,861 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-18 00:45:37,861 INFO L85 PathProgramCache]: Analyzing trace with hash 32058768, now seen corresponding path program 1 times [2022-03-18 00:45:37,861 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:45:37,861 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [830223627] [2022-03-18 00:45:37,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:45:37,861 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:45:37,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:45:37,876 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:45:37,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:45:37,880 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:45:37,880 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:45:37,880 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [830223627] [2022-03-18 00:45:37,880 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [830223627] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:45:37,880 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:45:37,880 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-18 00:45:38,491 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:45:38,492 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2097559230] [2022-03-18 00:45:38,492 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2097559230] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:45:38,492 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:45:38,492 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [26] imperfect sequences [] total 26 [2022-03-18 00:45:38,492 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [913518761] [2022-03-18 00:45:38,492 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:45:38,492 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-18 00:45:38,492 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:45:38,493 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-18 00:45:38,493 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=601, Unknown=0, NotChecked=0, Total=650 [2022-03-18 00:45:38,493 INFO L87 Difference]: Start difference. First operand 79 states and 80 transitions. Second operand has 26 states, 26 states have (on average 2.8076923076923075) internal successors, (73), 25 states have internal predecessors, (73), 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) [2022-03-18 00:45:39,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:45:39,300 INFO L93 Difference]: Finished difference Result 91 states and 95 transitions. [2022-03-18 00:45:39,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-03-18 00:45:39,300 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.8076923076923075) internal successors, (73), 25 states have internal predecessors, (73), 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 77 [2022-03-18 00:45:39,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:45:39,301 INFO L225 Difference]: With dead ends: 91 [2022-03-18 00:45:39,301 INFO L226 Difference]: Without dead ends: 83 [2022-03-18 00:45:39,301 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 8 SyntacticMatches, 45 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 253 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=141, Invalid=2211, Unknown=0, NotChecked=0, Total=2352 [2022-03-18 00:45:39,302 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 57 mSDsluCounter, 117 mSDsCounter, 0 mSdLazyCounter, 1749 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 129 SdHoareTripleChecker+Invalid, 1775 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 1749 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-18 00:45:39,302 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [57 Valid, 129 Invalid, 1775 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 1749 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-18 00:45:39,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2022-03-18 00:45:39,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 82. [2022-03-18 00:45:39,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 77 states have (on average 1.025974025974026) internal successors, (79), 77 states have internal predecessors, (79), 3 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) [2022-03-18 00:45:39,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 83 transitions. [2022-03-18 00:45:39,308 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 83 transitions. Word has length 77 [2022-03-18 00:45:39,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:45:39,309 INFO L478 AbstractCegarLoop]: Abstraction has 82 states and 83 transitions. [2022-03-18 00:45:39,309 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.8076923076923075) internal successors, (73), 25 states have internal predecessors, (73), 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) [2022-03-18 00:45:39,309 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 83 transitions. [2022-03-18 00:45:39,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-03-18 00:45:39,309 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:45:39,309 INFO L500 BasicCegarLoop]: trace histogram [23, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:45:39,309 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2022-03-18 00:45:39,309 INFO L403 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:45:39,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:45:39,310 INFO L85 PathProgramCache]: Analyzing trace with hash 1828793483, now seen corresponding path program 23 times [2022-03-18 00:45:39,310 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:45:39,310 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1094651730] [2022-03-18 00:45:39,420 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-18 00:45:39,420 INFO L85 PathProgramCache]: Analyzing trace with hash 91164112, now seen corresponding path program 1 times [2022-03-18 00:45:39,420 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:45:39,420 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [290571287] [2022-03-18 00:45:39,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:45:39,421 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:45:39,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:45:39,444 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:45:39,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:45:39,447 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:45:39,447 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:45:39,447 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [290571287] [2022-03-18 00:45:39,447 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [290571287] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:45:39,447 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:45:39,447 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-18 00:45:40,151 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:45:40,151 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1094651730] [2022-03-18 00:45:40,151 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1094651730] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:45:40,151 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:45:40,152 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [27] imperfect sequences [] total 27 [2022-03-18 00:45:40,152 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [782436019] [2022-03-18 00:45:40,152 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:45:40,152 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-03-18 00:45:40,152 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:45:40,152 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-03-18 00:45:40,153 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=651, Unknown=0, NotChecked=0, Total=702 [2022-03-18 00:45:40,153 INFO L87 Difference]: Start difference. First operand 82 states and 83 transitions. Second operand has 27 states, 27 states have (on average 2.814814814814815) internal successors, (76), 26 states have internal predecessors, (76), 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) [2022-03-18 00:45:41,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:45:41,011 INFO L93 Difference]: Finished difference Result 94 states and 98 transitions. [2022-03-18 00:45:41,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-03-18 00:45:41,011 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.814814814814815) internal successors, (76), 26 states have internal predecessors, (76), 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 80 [2022-03-18 00:45:41,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:45:41,012 INFO L225 Difference]: With dead ends: 94 [2022-03-18 00:45:41,012 INFO L226 Difference]: Without dead ends: 86 [2022-03-18 00:45:41,013 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 8 SyntacticMatches, 47 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 276 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=147, Invalid=2403, Unknown=0, NotChecked=0, Total=2550 [2022-03-18 00:45:41,013 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 59 mSDsluCounter, 122 mSDsCounter, 0 mSdLazyCounter, 1897 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 134 SdHoareTripleChecker+Invalid, 1924 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 1897 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-18 00:45:41,013 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [59 Valid, 134 Invalid, 1924 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 1897 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-18 00:45:41,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2022-03-18 00:45:41,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 85. [2022-03-18 00:45:41,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 80 states have (on average 1.025) internal successors, (82), 80 states have internal predecessors, (82), 3 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) [2022-03-18 00:45:41,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 86 transitions. [2022-03-18 00:45:41,020 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 86 transitions. Word has length 80 [2022-03-18 00:45:41,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:45:41,020 INFO L478 AbstractCegarLoop]: Abstraction has 85 states and 86 transitions. [2022-03-18 00:45:41,021 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.814814814814815) internal successors, (76), 26 states have internal predecessors, (76), 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) [2022-03-18 00:45:41,021 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 86 transitions. [2022-03-18 00:45:41,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2022-03-18 00:45:41,021 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:45:41,021 INFO L500 BasicCegarLoop]: trace histogram [24, 24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:45:41,021 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2022-03-18 00:45:41,021 INFO L403 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:45:41,022 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:45:41,022 INFO L85 PathProgramCache]: Analyzing trace with hash -1783671357, now seen corresponding path program 24 times [2022-03-18 00:45:41,022 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:45:41,022 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1666398915] [2022-03-18 00:45:41,143 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-18 00:45:41,144 INFO L85 PathProgramCache]: Analyzing trace with hash 150269456, now seen corresponding path program 1 times [2022-03-18 00:45:41,144 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:45:41,144 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1644040190] [2022-03-18 00:45:41,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:45:41,144 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:45:41,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:45:41,166 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:45:41,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:45:41,170 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:45:41,170 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:45:41,170 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1644040190] [2022-03-18 00:45:41,170 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1644040190] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:45:41,170 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:45:41,170 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-18 00:45:41,907 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:45:41,908 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1666398915] [2022-03-18 00:45:41,908 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1666398915] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:45:41,908 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:45:41,908 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [28] imperfect sequences [] total 28 [2022-03-18 00:45:41,908 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [743616060] [2022-03-18 00:45:41,908 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:45:41,908 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-03-18 00:45:41,908 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:45:41,908 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-03-18 00:45:41,909 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=703, Unknown=0, NotChecked=0, Total=756 [2022-03-18 00:45:41,909 INFO L87 Difference]: Start difference. First operand 85 states and 86 transitions. Second operand has 28 states, 28 states have (on average 2.8214285714285716) internal successors, (79), 27 states have internal predecessors, (79), 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) [2022-03-18 00:45:42,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:45:42,871 INFO L93 Difference]: Finished difference Result 97 states and 101 transitions. [2022-03-18 00:45:42,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-03-18 00:45:42,872 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.8214285714285716) internal successors, (79), 27 states have internal predecessors, (79), 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 83 [2022-03-18 00:45:42,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:45:42,872 INFO L225 Difference]: With dead ends: 97 [2022-03-18 00:45:42,872 INFO L226 Difference]: Without dead ends: 89 [2022-03-18 00:45:42,873 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 8 SyntacticMatches, 49 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 300 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=153, Invalid=2603, Unknown=0, NotChecked=0, Total=2756 [2022-03-18 00:45:42,873 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 61 mSDsluCounter, 127 mSDsCounter, 0 mSdLazyCounter, 2051 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 139 SdHoareTripleChecker+Invalid, 2079 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 2051 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-18 00:45:42,874 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [61 Valid, 139 Invalid, 2079 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 2051 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-18 00:45:42,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2022-03-18 00:45:42,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 88. [2022-03-18 00:45:42,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 83 states have (on average 1.0240963855421688) internal successors, (85), 83 states have internal predecessors, (85), 3 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) [2022-03-18 00:45:42,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 89 transitions. [2022-03-18 00:45:42,881 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 89 transitions. Word has length 83 [2022-03-18 00:45:42,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:45:42,881 INFO L478 AbstractCegarLoop]: Abstraction has 88 states and 89 transitions. [2022-03-18 00:45:42,881 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.8214285714285716) internal successors, (79), 27 states have internal predecessors, (79), 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) [2022-03-18 00:45:42,881 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 89 transitions. [2022-03-18 00:45:42,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2022-03-18 00:45:42,882 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:45:42,882 INFO L500 BasicCegarLoop]: trace histogram [25, 25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:45:42,882 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2022-03-18 00:45:42,882 INFO L403 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:45:42,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:45:42,882 INFO L85 PathProgramCache]: Analyzing trace with hash -1728183925, now seen corresponding path program 25 times [2022-03-18 00:45:42,882 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:45:42,882 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1699090128] [2022-03-18 00:45:42,959 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-18 00:45:42,960 INFO L85 PathProgramCache]: Analyzing trace with hash 209374800, now seen corresponding path program 1 times [2022-03-18 00:45:42,960 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:45:42,960 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1184570265] [2022-03-18 00:45:42,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:45:42,960 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:45:42,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:45:42,976 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:45:42,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:45:42,980 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:45:42,980 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:45:42,980 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1184570265] [2022-03-18 00:45:42,980 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1184570265] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:45:42,980 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:45:42,980 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-18 00:45:43,712 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:45:43,712 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1699090128] [2022-03-18 00:45:43,712 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1699090128] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:45:43,712 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:45:43,712 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [29] imperfect sequences [] total 29 [2022-03-18 00:45:43,712 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1641010096] [2022-03-18 00:45:43,712 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:45:43,713 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-03-18 00:45:43,713 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:45:43,713 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-03-18 00:45:43,713 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=757, Unknown=0, NotChecked=0, Total=812 [2022-03-18 00:45:43,714 INFO L87 Difference]: Start difference. First operand 88 states and 89 transitions. Second operand has 29 states, 29 states have (on average 2.8275862068965516) internal successors, (82), 28 states have internal predecessors, (82), 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) [2022-03-18 00:45:44,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:45:44,618 INFO L93 Difference]: Finished difference Result 100 states and 104 transitions. [2022-03-18 00:45:44,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-03-18 00:45:44,619 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.8275862068965516) internal successors, (82), 28 states have internal predecessors, (82), 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 86 [2022-03-18 00:45:44,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:45:44,619 INFO L225 Difference]: With dead ends: 100 [2022-03-18 00:45:44,619 INFO L226 Difference]: Without dead ends: 92 [2022-03-18 00:45:44,620 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 8 SyntacticMatches, 51 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 325 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=159, Invalid=2811, Unknown=0, NotChecked=0, Total=2970 [2022-03-18 00:45:44,621 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 63 mSDsluCounter, 132 mSDsCounter, 0 mSdLazyCounter, 2211 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 144 SdHoareTripleChecker+Invalid, 2240 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 2211 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-18 00:45:44,621 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [63 Valid, 144 Invalid, 2240 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 2211 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-18 00:45:44,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2022-03-18 00:45:44,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 91. [2022-03-18 00:45:44,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 86 states have (on average 1.0232558139534884) internal successors, (88), 86 states have internal predecessors, (88), 3 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) [2022-03-18 00:45:44,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 92 transitions. [2022-03-18 00:45:44,631 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 92 transitions. Word has length 86 [2022-03-18 00:45:44,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:45:44,631 INFO L478 AbstractCegarLoop]: Abstraction has 91 states and 92 transitions. [2022-03-18 00:45:44,631 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.8275862068965516) internal successors, (82), 28 states have internal predecessors, (82), 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) [2022-03-18 00:45:44,631 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 92 transitions. [2022-03-18 00:45:44,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2022-03-18 00:45:44,632 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:45:44,632 INFO L500 BasicCegarLoop]: trace histogram [26, 26, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:45:44,632 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2022-03-18 00:45:44,632 INFO L403 AbstractCegarLoop]: === Iteration 28 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:45:44,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:45:44,632 INFO L85 PathProgramCache]: Analyzing trace with hash 2030461123, now seen corresponding path program 26 times [2022-03-18 00:45:44,632 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:45:44,633 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [656499847] [2022-03-18 00:45:44,776 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-18 00:45:44,776 INFO L85 PathProgramCache]: Analyzing trace with hash 268480144, now seen corresponding path program 1 times [2022-03-18 00:45:44,777 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:45:44,777 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2015130223] [2022-03-18 00:45:44,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:45:44,777 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:45:44,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:45:44,791 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:45:44,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:45:44,794 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:45:44,794 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:45:44,794 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2015130223] [2022-03-18 00:45:44,795 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2015130223] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:45:44,795 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:45:44,795 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-18 00:45:45,589 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:45:45,589 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [656499847] [2022-03-18 00:45:45,589 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [656499847] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:45:45,589 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:45:45,589 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [30] imperfect sequences [] total 30 [2022-03-18 00:45:45,589 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [647935546] [2022-03-18 00:45:45,589 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:45:45,590 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-03-18 00:45:45,590 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:45:45,590 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-03-18 00:45:45,590 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=813, Unknown=0, NotChecked=0, Total=870 [2022-03-18 00:45:45,590 INFO L87 Difference]: Start difference. First operand 91 states and 92 transitions. Second operand has 30 states, 30 states have (on average 2.8333333333333335) internal successors, (85), 29 states have internal predecessors, (85), 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) [2022-03-18 00:45:46,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:45:46,644 INFO L93 Difference]: Finished difference Result 103 states and 107 transitions. [2022-03-18 00:45:46,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-03-18 00:45:46,645 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.8333333333333335) internal successors, (85), 29 states have internal predecessors, (85), 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 89 [2022-03-18 00:45:46,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:45:46,645 INFO L225 Difference]: With dead ends: 103 [2022-03-18 00:45:46,645 INFO L226 Difference]: Without dead ends: 95 [2022-03-18 00:45:46,646 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 8 SyntacticMatches, 53 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 351 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=165, Invalid=3027, Unknown=0, NotChecked=0, Total=3192 [2022-03-18 00:45:46,647 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 65 mSDsluCounter, 137 mSDsCounter, 0 mSdLazyCounter, 2377 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 149 SdHoareTripleChecker+Invalid, 2407 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 2377 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-18 00:45:46,647 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [65 Valid, 149 Invalid, 2407 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 2377 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-03-18 00:45:46,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2022-03-18 00:45:46,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 94. [2022-03-18 00:45:46,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 89 states have (on average 1.0224719101123596) internal successors, (91), 89 states have internal predecessors, (91), 3 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) [2022-03-18 00:45:46,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 95 transitions. [2022-03-18 00:45:46,654 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 95 transitions. Word has length 89 [2022-03-18 00:45:46,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:45:46,655 INFO L478 AbstractCegarLoop]: Abstraction has 94 states and 95 transitions. [2022-03-18 00:45:46,655 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.8333333333333335) internal successors, (85), 29 states have internal predecessors, (85), 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) [2022-03-18 00:45:46,655 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 95 transitions. [2022-03-18 00:45:46,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2022-03-18 00:45:46,655 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:45:46,655 INFO L500 BasicCegarLoop]: trace histogram [27, 27, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:45:46,655 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2022-03-18 00:45:46,655 INFO L403 AbstractCegarLoop]: === Iteration 29 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:45:46,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:45:46,656 INFO L85 PathProgramCache]: Analyzing trace with hash 1732712075, now seen corresponding path program 27 times [2022-03-18 00:45:46,656 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:45:46,656 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [575394730] [2022-03-18 00:45:46,759 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-18 00:45:46,760 INFO L85 PathProgramCache]: Analyzing trace with hash 327585488, now seen corresponding path program 1 times [2022-03-18 00:45:46,760 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:45:46,760 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2034884511] [2022-03-18 00:45:46,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:45:46,760 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:45:46,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:45:46,783 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:45:46,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:45:46,787 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:45:46,787 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:45:46,787 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2034884511] [2022-03-18 00:45:46,787 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2034884511] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:45:46,787 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:45:46,787 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-18 00:45:47,639 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:45:47,639 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [575394730] [2022-03-18 00:45:47,639 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [575394730] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:45:47,640 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:45:47,640 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [31] imperfect sequences [] total 31 [2022-03-18 00:45:47,640 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1534676043] [2022-03-18 00:45:47,640 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:45:47,640 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-03-18 00:45:47,640 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:45:47,640 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-03-18 00:45:47,640 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=871, Unknown=0, NotChecked=0, Total=930 [2022-03-18 00:45:47,641 INFO L87 Difference]: Start difference. First operand 94 states and 95 transitions. Second operand has 31 states, 31 states have (on average 2.838709677419355) internal successors, (88), 30 states have internal predecessors, (88), 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) [2022-03-18 00:45:48,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:45:48,641 INFO L93 Difference]: Finished difference Result 106 states and 110 transitions. [2022-03-18 00:45:48,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-03-18 00:45:48,641 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.838709677419355) internal successors, (88), 30 states have internal predecessors, (88), 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 92 [2022-03-18 00:45:48,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:45:48,642 INFO L225 Difference]: With dead ends: 106 [2022-03-18 00:45:48,642 INFO L226 Difference]: Without dead ends: 98 [2022-03-18 00:45:48,643 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 8 SyntacticMatches, 55 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 378 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=171, Invalid=3251, Unknown=0, NotChecked=0, Total=3422 [2022-03-18 00:45:48,647 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 67 mSDsluCounter, 142 mSDsCounter, 0 mSdLazyCounter, 2549 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 154 SdHoareTripleChecker+Invalid, 2580 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 2549 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-18 00:45:48,647 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [67 Valid, 154 Invalid, 2580 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 2549 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-03-18 00:45:48,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2022-03-18 00:45:48,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 97. [2022-03-18 00:45:48,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 92 states have (on average 1.0217391304347827) internal successors, (94), 92 states have internal predecessors, (94), 3 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) [2022-03-18 00:45:48,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 98 transitions. [2022-03-18 00:45:48,656 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 98 transitions. Word has length 92 [2022-03-18 00:45:48,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:45:48,656 INFO L478 AbstractCegarLoop]: Abstraction has 97 states and 98 transitions. [2022-03-18 00:45:48,656 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.838709677419355) internal successors, (88), 30 states have internal predecessors, (88), 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) [2022-03-18 00:45:48,656 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 98 transitions. [2022-03-18 00:45:48,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2022-03-18 00:45:48,656 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:45:48,657 INFO L500 BasicCegarLoop]: trace histogram [28, 28, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:45:48,657 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2022-03-18 00:45:48,657 INFO L403 AbstractCegarLoop]: === Iteration 30 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:45:48,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:45:48,657 INFO L85 PathProgramCache]: Analyzing trace with hash 598289347, now seen corresponding path program 28 times [2022-03-18 00:45:48,657 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:45:48,657 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1935196298] [2022-03-18 00:45:48,773 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-18 00:45:48,774 INFO L85 PathProgramCache]: Analyzing trace with hash 386690832, now seen corresponding path program 1 times [2022-03-18 00:45:48,774 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:45:48,774 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [540288471] [2022-03-18 00:45:48,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:45:48,774 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:45:48,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:45:48,791 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:45:48,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:45:48,793 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:45:48,793 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:45:48,794 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [540288471] [2022-03-18 00:45:48,794 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [540288471] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:45:48,794 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:45:48,794 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-18 00:45:49,747 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:45:49,747 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1935196298] [2022-03-18 00:45:49,747 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1935196298] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:45:49,747 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:45:49,747 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [32] imperfect sequences [] total 32 [2022-03-18 00:45:49,747 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2060131453] [2022-03-18 00:45:49,747 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:45:49,748 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-03-18 00:45:49,748 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:45:49,748 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-03-18 00:45:49,748 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=931, Unknown=0, NotChecked=0, Total=992 [2022-03-18 00:45:49,748 INFO L87 Difference]: Start difference. First operand 97 states and 98 transitions. Second operand has 32 states, 32 states have (on average 2.84375) internal successors, (91), 31 states have internal predecessors, (91), 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) [2022-03-18 00:45:50,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:45:50,920 INFO L93 Difference]: Finished difference Result 109 states and 113 transitions. [2022-03-18 00:45:50,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-03-18 00:45:50,921 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.84375) internal successors, (91), 31 states have internal predecessors, (91), 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 95 [2022-03-18 00:45:50,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:45:50,921 INFO L225 Difference]: With dead ends: 109 [2022-03-18 00:45:50,921 INFO L226 Difference]: Without dead ends: 101 [2022-03-18 00:45:50,922 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 8 SyntacticMatches, 57 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 406 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=177, Invalid=3483, Unknown=0, NotChecked=0, Total=3660 [2022-03-18 00:45:50,922 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 69 mSDsluCounter, 147 mSDsCounter, 0 mSdLazyCounter, 2727 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 159 SdHoareTripleChecker+Invalid, 2759 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 2727 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-03-18 00:45:50,922 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [69 Valid, 159 Invalid, 2759 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 2727 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-03-18 00:45:50,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2022-03-18 00:45:50,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 100. [2022-03-18 00:45:50,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 95 states have (on average 1.0210526315789474) internal successors, (97), 95 states have internal predecessors, (97), 3 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) [2022-03-18 00:45:50,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 101 transitions. [2022-03-18 00:45:50,931 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 101 transitions. Word has length 95 [2022-03-18 00:45:50,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:45:50,931 INFO L478 AbstractCegarLoop]: Abstraction has 100 states and 101 transitions. [2022-03-18 00:45:50,931 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.84375) internal successors, (91), 31 states have internal predecessors, (91), 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) [2022-03-18 00:45:50,931 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 101 transitions. [2022-03-18 00:45:50,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2022-03-18 00:45:50,931 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:45:50,932 INFO L500 BasicCegarLoop]: trace histogram [29, 29, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:45:50,932 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2022-03-18 00:45:50,932 INFO L403 AbstractCegarLoop]: === Iteration 31 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:45:50,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:45:50,932 INFO L85 PathProgramCache]: Analyzing trace with hash 2108451723, now seen corresponding path program 29 times [2022-03-18 00:45:50,932 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:45:50,932 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1251628021] [2022-03-18 00:45:51,052 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-18 00:45:51,052 INFO L85 PathProgramCache]: Analyzing trace with hash 445796176, now seen corresponding path program 1 times [2022-03-18 00:45:51,052 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:45:51,052 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1372570181] [2022-03-18 00:45:51,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:45:51,053 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:45:51,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:45:51,072 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:45:51,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:45:51,075 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:45:51,075 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:45:51,075 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1372570181] [2022-03-18 00:45:51,075 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1372570181] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:45:51,075 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:45:51,075 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-18 00:45:52,012 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:45:52,012 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1251628021] [2022-03-18 00:45:52,012 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1251628021] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:45:52,012 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:45:52,012 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [33] imperfect sequences [] total 33 [2022-03-18 00:45:52,012 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1712875872] [2022-03-18 00:45:52,012 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:45:52,013 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-03-18 00:45:52,013 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:45:52,013 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-03-18 00:45:52,013 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=993, Unknown=0, NotChecked=0, Total=1056 [2022-03-18 00:45:52,013 INFO L87 Difference]: Start difference. First operand 100 states and 101 transitions. Second operand has 33 states, 33 states have (on average 2.8484848484848486) internal successors, (94), 32 states have internal predecessors, (94), 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) [2022-03-18 00:45:53,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:45:53,215 INFO L93 Difference]: Finished difference Result 112 states and 116 transitions. [2022-03-18 00:45:53,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-03-18 00:45:53,216 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.8484848484848486) internal successors, (94), 32 states have internal predecessors, (94), 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 98 [2022-03-18 00:45:53,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:45:53,216 INFO L225 Difference]: With dead ends: 112 [2022-03-18 00:45:53,216 INFO L226 Difference]: Without dead ends: 104 [2022-03-18 00:45:53,217 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 8 SyntacticMatches, 59 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 435 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=183, Invalid=3723, Unknown=0, NotChecked=0, Total=3906 [2022-03-18 00:45:53,218 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 71 mSDsluCounter, 152 mSDsCounter, 0 mSdLazyCounter, 2911 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 164 SdHoareTripleChecker+Invalid, 2944 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 2911 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-03-18 00:45:53,218 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [71 Valid, 164 Invalid, 2944 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 2911 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-03-18 00:45:53,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2022-03-18 00:45:53,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 103. [2022-03-18 00:45:53,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 98 states have (on average 1.0204081632653061) internal successors, (100), 98 states have internal predecessors, (100), 3 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) [2022-03-18 00:45:53,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 104 transitions. [2022-03-18 00:45:53,227 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 104 transitions. Word has length 98 [2022-03-18 00:45:53,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:45:53,227 INFO L478 AbstractCegarLoop]: Abstraction has 103 states and 104 transitions. [2022-03-18 00:45:53,227 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.8484848484848486) internal successors, (94), 32 states have internal predecessors, (94), 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) [2022-03-18 00:45:53,227 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 104 transitions. [2022-03-18 00:45:53,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2022-03-18 00:45:53,228 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:45:53,228 INFO L500 BasicCegarLoop]: trace histogram [30, 30, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:45:53,228 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2022-03-18 00:45:53,228 INFO L403 AbstractCegarLoop]: === Iteration 32 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:45:53,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:45:53,228 INFO L85 PathProgramCache]: Analyzing trace with hash 1573369539, now seen corresponding path program 30 times [2022-03-18 00:45:53,228 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:45:53,228 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1140780110] [2022-03-18 00:45:53,338 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-18 00:45:53,338 INFO L85 PathProgramCache]: Analyzing trace with hash 504901520, now seen corresponding path program 1 times [2022-03-18 00:45:53,338 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:45:53,338 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1643671572] [2022-03-18 00:45:53,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:45:53,338 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:45:53,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:45:53,353 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:45:53,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:45:53,357 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:45:53,357 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:45:53,357 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1643671572] [2022-03-18 00:45:53,357 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1643671572] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:45:53,357 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:45:53,357 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-18 00:45:54,371 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:45:54,371 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1140780110] [2022-03-18 00:45:54,371 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1140780110] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:45:54,371 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:45:54,371 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [34] imperfect sequences [] total 34 [2022-03-18 00:45:54,371 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [953056787] [2022-03-18 00:45:54,371 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:45:54,371 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-03-18 00:45:54,371 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:45:54,372 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-03-18 00:45:54,372 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=1057, Unknown=0, NotChecked=0, Total=1122 [2022-03-18 00:45:54,372 INFO L87 Difference]: Start difference. First operand 103 states and 104 transitions. Second operand has 34 states, 34 states have (on average 2.8529411764705883) internal successors, (97), 33 states have internal predecessors, (97), 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) [2022-03-18 00:45:55,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:45:55,604 INFO L93 Difference]: Finished difference Result 115 states and 119 transitions. [2022-03-18 00:45:55,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-03-18 00:45:55,604 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.8529411764705883) internal successors, (97), 33 states have internal predecessors, (97), 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 101 [2022-03-18 00:45:55,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:45:55,605 INFO L225 Difference]: With dead ends: 115 [2022-03-18 00:45:55,605 INFO L226 Difference]: Without dead ends: 107 [2022-03-18 00:45:55,606 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 8 SyntacticMatches, 61 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 465 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=189, Invalid=3971, Unknown=0, NotChecked=0, Total=4160 [2022-03-18 00:45:55,606 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 73 mSDsluCounter, 157 mSDsCounter, 0 mSdLazyCounter, 3101 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 169 SdHoareTripleChecker+Invalid, 3135 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 3101 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-03-18 00:45:55,607 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [73 Valid, 169 Invalid, 3135 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 3101 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-03-18 00:45:55,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2022-03-18 00:45:55,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 106. [2022-03-18 00:45:55,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 101 states have (on average 1.0198019801980198) internal successors, (103), 101 states have internal predecessors, (103), 3 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) [2022-03-18 00:45:55,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 107 transitions. [2022-03-18 00:45:55,617 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 107 transitions. Word has length 101 [2022-03-18 00:45:55,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:45:55,617 INFO L478 AbstractCegarLoop]: Abstraction has 106 states and 107 transitions. [2022-03-18 00:45:55,617 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 2.8529411764705883) internal successors, (97), 33 states have internal predecessors, (97), 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) [2022-03-18 00:45:55,617 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 107 transitions. [2022-03-18 00:45:55,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2022-03-18 00:45:55,618 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:45:55,618 INFO L500 BasicCegarLoop]: trace histogram [31, 31, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:45:55,618 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2022-03-18 00:45:55,618 INFO L403 AbstractCegarLoop]: === Iteration 33 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:45:55,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:45:55,618 INFO L85 PathProgramCache]: Analyzing trace with hash -436338549, now seen corresponding path program 31 times [2022-03-18 00:45:55,618 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:45:55,618 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [5493588] [2022-03-18 00:45:55,735 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-18 00:45:55,735 INFO L85 PathProgramCache]: Analyzing trace with hash 564006864, now seen corresponding path program 1 times [2022-03-18 00:45:55,735 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:45:55,735 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1134385136] [2022-03-18 00:45:55,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:45:55,736 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:45:55,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:45:55,750 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:45:55,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:45:55,753 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:45:55,753 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:45:55,753 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1134385136] [2022-03-18 00:45:55,754 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1134385136] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:45:55,754 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:45:55,754 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-18 00:45:56,825 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:45:56,825 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [5493588] [2022-03-18 00:45:56,825 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [5493588] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:45:56,825 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:45:56,825 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [35] imperfect sequences [] total 35 [2022-03-18 00:45:56,825 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1022467905] [2022-03-18 00:45:56,825 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:45:56,827 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-03-18 00:45:56,827 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:45:56,827 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-03-18 00:45:56,828 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=1123, Unknown=0, NotChecked=0, Total=1190 [2022-03-18 00:45:56,828 INFO L87 Difference]: Start difference. First operand 106 states and 107 transitions. Second operand has 35 states, 35 states have (on average 2.857142857142857) internal successors, (100), 34 states have internal predecessors, (100), 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) [2022-03-18 00:45:58,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:45:58,133 INFO L93 Difference]: Finished difference Result 118 states and 122 transitions. [2022-03-18 00:45:58,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-03-18 00:45:58,133 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.857142857142857) internal successors, (100), 34 states have internal predecessors, (100), 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 104 [2022-03-18 00:45:58,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:45:58,134 INFO L225 Difference]: With dead ends: 118 [2022-03-18 00:45:58,134 INFO L226 Difference]: Without dead ends: 110 [2022-03-18 00:45:58,134 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 8 SyntacticMatches, 63 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 496 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=195, Invalid=4227, Unknown=0, NotChecked=0, Total=4422 [2022-03-18 00:45:58,134 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 75 mSDsluCounter, 162 mSDsCounter, 0 mSdLazyCounter, 3297 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 174 SdHoareTripleChecker+Invalid, 3332 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 3297 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-03-18 00:45:58,134 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [75 Valid, 174 Invalid, 3332 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 3297 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-03-18 00:45:58,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2022-03-18 00:45:58,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 109. [2022-03-18 00:45:58,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 104 states have (on average 1.0192307692307692) internal successors, (106), 104 states have internal predecessors, (106), 3 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) [2022-03-18 00:45:58,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 110 transitions. [2022-03-18 00:45:58,144 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 110 transitions. Word has length 104 [2022-03-18 00:45:58,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:45:58,145 INFO L478 AbstractCegarLoop]: Abstraction has 109 states and 110 transitions. [2022-03-18 00:45:58,145 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 2.857142857142857) internal successors, (100), 34 states have internal predecessors, (100), 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) [2022-03-18 00:45:58,145 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 110 transitions. [2022-03-18 00:45:58,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2022-03-18 00:45:58,145 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:45:58,145 INFO L500 BasicCegarLoop]: trace histogram [32, 32, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:45:58,145 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2022-03-18 00:45:58,145 INFO L403 AbstractCegarLoop]: === Iteration 34 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:45:58,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:45:58,146 INFO L85 PathProgramCache]: Analyzing trace with hash 194118083, now seen corresponding path program 32 times [2022-03-18 00:45:58,146 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:45:58,146 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1468694409] [2022-03-18 00:45:58,265 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-18 00:45:58,265 INFO L85 PathProgramCache]: Analyzing trace with hash 623112208, now seen corresponding path program 1 times [2022-03-18 00:45:58,265 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:45:58,265 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [705549565] [2022-03-18 00:45:58,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:45:58,266 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:45:58,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:45:58,282 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:45:58,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:45:58,284 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:45:58,284 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:45:58,284 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [705549565] [2022-03-18 00:45:58,284 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [705549565] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:45:58,284 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:45:58,284 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-18 00:45:59,371 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:45:59,371 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1468694409] [2022-03-18 00:45:59,371 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1468694409] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:45:59,371 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:45:59,371 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [36] imperfect sequences [] total 36 [2022-03-18 00:45:59,371 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1372424658] [2022-03-18 00:45:59,372 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:45:59,372 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-03-18 00:45:59,372 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:45:59,372 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-03-18 00:45:59,372 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=1191, Unknown=0, NotChecked=0, Total=1260 [2022-03-18 00:45:59,372 INFO L87 Difference]: Start difference. First operand 109 states and 110 transitions. Second operand has 36 states, 36 states have (on average 2.861111111111111) internal successors, (103), 35 states have internal predecessors, (103), 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) [2022-03-18 00:46:00,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:46:00,725 INFO L93 Difference]: Finished difference Result 121 states and 125 transitions. [2022-03-18 00:46:00,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-03-18 00:46:00,725 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.861111111111111) internal successors, (103), 35 states have internal predecessors, (103), 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 107 [2022-03-18 00:46:00,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:46:00,726 INFO L225 Difference]: With dead ends: 121 [2022-03-18 00:46:00,726 INFO L226 Difference]: Without dead ends: 113 [2022-03-18 00:46:00,727 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 8 SyntacticMatches, 65 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 528 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=201, Invalid=4491, Unknown=0, NotChecked=0, Total=4692 [2022-03-18 00:46:00,727 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 77 mSDsluCounter, 167 mSDsCounter, 0 mSdLazyCounter, 3499 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 179 SdHoareTripleChecker+Invalid, 3535 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 3499 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-03-18 00:46:00,727 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [77 Valid, 179 Invalid, 3535 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 3499 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-03-18 00:46:00,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2022-03-18 00:46:00,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 112. [2022-03-18 00:46:00,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 107 states have (on average 1.0186915887850467) internal successors, (109), 107 states have internal predecessors, (109), 3 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) [2022-03-18 00:46:00,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 113 transitions. [2022-03-18 00:46:00,738 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 113 transitions. Word has length 107 [2022-03-18 00:46:00,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:46:00,738 INFO L478 AbstractCegarLoop]: Abstraction has 112 states and 113 transitions. [2022-03-18 00:46:00,738 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 2.861111111111111) internal successors, (103), 35 states have internal predecessors, (103), 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) [2022-03-18 00:46:00,738 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 113 transitions. [2022-03-18 00:46:00,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2022-03-18 00:46:00,738 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:46:00,739 INFO L500 BasicCegarLoop]: trace histogram [33, 33, 33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:46:00,739 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2022-03-18 00:46:00,739 INFO L403 AbstractCegarLoop]: === Iteration 35 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:46:00,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:46:00,739 INFO L85 PathProgramCache]: Analyzing trace with hash 235656587, now seen corresponding path program 33 times [2022-03-18 00:46:00,739 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:46:00,739 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [779695217] [2022-03-18 00:46:00,843 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-18 00:46:00,843 INFO L85 PathProgramCache]: Analyzing trace with hash 682217552, now seen corresponding path program 1 times [2022-03-18 00:46:00,843 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:46:00,844 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1601344363] [2022-03-18 00:46:00,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:46:00,844 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:46:00,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:46:00,857 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:46:00,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:46:00,859 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:46:00,859 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:46:00,859 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1601344363] [2022-03-18 00:46:00,859 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1601344363] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:46:00,859 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:46:00,859 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-18 00:46:02,002 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:46:02,002 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [779695217] [2022-03-18 00:46:02,003 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [779695217] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:46:02,003 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:46:02,003 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [37] imperfect sequences [] total 37 [2022-03-18 00:46:02,003 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1436334548] [2022-03-18 00:46:02,003 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:46:02,003 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-03-18 00:46:02,003 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:46:02,003 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-03-18 00:46:02,004 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=1261, Unknown=0, NotChecked=0, Total=1332 [2022-03-18 00:46:02,004 INFO L87 Difference]: Start difference. First operand 112 states and 113 transitions. Second operand has 37 states, 37 states have (on average 2.864864864864865) internal successors, (106), 36 states have internal predecessors, (106), 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) [2022-03-18 00:46:03,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:46:03,473 INFO L93 Difference]: Finished difference Result 124 states and 128 transitions. [2022-03-18 00:46:03,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-03-18 00:46:03,474 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.864864864864865) internal successors, (106), 36 states have internal predecessors, (106), 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 110 [2022-03-18 00:46:03,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:46:03,474 INFO L225 Difference]: With dead ends: 124 [2022-03-18 00:46:03,474 INFO L226 Difference]: Without dead ends: 116 [2022-03-18 00:46:03,475 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 8 SyntacticMatches, 67 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 561 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=207, Invalid=4763, Unknown=0, NotChecked=0, Total=4970 [2022-03-18 00:46:03,475 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 79 mSDsluCounter, 172 mSDsCounter, 0 mSdLazyCounter, 3707 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 184 SdHoareTripleChecker+Invalid, 3744 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 3707 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-03-18 00:46:03,475 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [79 Valid, 184 Invalid, 3744 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 3707 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-03-18 00:46:03,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2022-03-18 00:46:03,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 115. [2022-03-18 00:46:03,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 110 states have (on average 1.018181818181818) internal successors, (112), 110 states have internal predecessors, (112), 3 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) [2022-03-18 00:46:03,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 116 transitions. [2022-03-18 00:46:03,489 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 116 transitions. Word has length 110 [2022-03-18 00:46:03,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:46:03,489 INFO L478 AbstractCegarLoop]: Abstraction has 115 states and 116 transitions. [2022-03-18 00:46:03,489 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 2.864864864864865) internal successors, (106), 36 states have internal predecessors, (106), 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) [2022-03-18 00:46:03,489 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 116 transitions. [2022-03-18 00:46:03,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2022-03-18 00:46:03,490 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:46:03,490 INFO L500 BasicCegarLoop]: trace histogram [34, 34, 34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:46:03,490 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2022-03-18 00:46:03,490 INFO L403 AbstractCegarLoop]: === Iteration 36 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:46:03,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:46:03,490 INFO L85 PathProgramCache]: Analyzing trace with hash 758648003, now seen corresponding path program 34 times [2022-03-18 00:46:03,490 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:46:03,490 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1816402465] [2022-03-18 00:46:03,606 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-18 00:46:03,606 INFO L85 PathProgramCache]: Analyzing trace with hash 741322896, now seen corresponding path program 1 times [2022-03-18 00:46:03,606 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:46:03,606 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2123787640] [2022-03-18 00:46:03,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:46:03,607 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:46:03,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:46:03,629 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:46:03,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:46:03,631 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:46:03,631 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:46:03,631 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2123787640] [2022-03-18 00:46:03,632 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2123787640] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:46:03,632 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:46:03,632 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-18 00:46:04,831 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:46:04,831 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1816402465] [2022-03-18 00:46:04,831 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1816402465] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:46:04,831 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:46:04,831 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [38] imperfect sequences [] total 38 [2022-03-18 00:46:04,831 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [697282490] [2022-03-18 00:46:04,831 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:46:04,831 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-03-18 00:46:04,831 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:46:04,832 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-03-18 00:46:04,832 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=1333, Unknown=0, NotChecked=0, Total=1406 [2022-03-18 00:46:04,832 INFO L87 Difference]: Start difference. First operand 115 states and 116 transitions. Second operand has 38 states, 38 states have (on average 2.8684210526315788) internal successors, (109), 37 states have internal predecessors, (109), 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) [2022-03-18 00:46:06,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:46:06,353 INFO L93 Difference]: Finished difference Result 127 states and 131 transitions. [2022-03-18 00:46:06,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-03-18 00:46:06,353 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.8684210526315788) internal successors, (109), 37 states have internal predecessors, (109), 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 113 [2022-03-18 00:46:06,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:46:06,354 INFO L225 Difference]: With dead ends: 127 [2022-03-18 00:46:06,354 INFO L226 Difference]: Without dead ends: 119 [2022-03-18 00:46:06,354 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 8 SyntacticMatches, 69 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 595 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=213, Invalid=5043, Unknown=0, NotChecked=0, Total=5256 [2022-03-18 00:46:06,355 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 81 mSDsluCounter, 177 mSDsCounter, 0 mSdLazyCounter, 3921 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 189 SdHoareTripleChecker+Invalid, 3959 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 3921 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-03-18 00:46:06,355 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [81 Valid, 189 Invalid, 3959 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 3921 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-03-18 00:46:06,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2022-03-18 00:46:06,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 118. [2022-03-18 00:46:06,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118 states, 113 states have (on average 1.0176991150442478) internal successors, (115), 113 states have internal predecessors, (115), 3 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) [2022-03-18 00:46:06,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 119 transitions. [2022-03-18 00:46:06,375 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 119 transitions. Word has length 113 [2022-03-18 00:46:06,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:46:06,375 INFO L478 AbstractCegarLoop]: Abstraction has 118 states and 119 transitions. [2022-03-18 00:46:06,375 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 2.8684210526315788) internal successors, (109), 37 states have internal predecessors, (109), 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) [2022-03-18 00:46:06,375 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 119 transitions. [2022-03-18 00:46:06,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2022-03-18 00:46:06,375 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:46:06,376 INFO L500 BasicCegarLoop]: trace histogram [35, 35, 35, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:46:06,376 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2022-03-18 00:46:06,376 INFO L403 AbstractCegarLoop]: === Iteration 37 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:46:06,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:46:06,376 INFO L85 PathProgramCache]: Analyzing trace with hash -945427829, now seen corresponding path program 35 times [2022-03-18 00:46:06,376 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:46:06,376 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1880488475] [2022-03-18 00:46:06,456 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-18 00:46:06,456 INFO L85 PathProgramCache]: Analyzing trace with hash 800428240, now seen corresponding path program 1 times [2022-03-18 00:46:06,456 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:46:06,456 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1889305267] [2022-03-18 00:46:06,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:46:06,456 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:46:06,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:46:06,474 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:46:06,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:46:06,485 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:46:06,485 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:46:06,485 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1889305267] [2022-03-18 00:46:06,485 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1889305267] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:46:06,485 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:46:06,485 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-18 00:46:07,757 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:46:07,758 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1880488475] [2022-03-18 00:46:07,758 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1880488475] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:46:07,758 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:46:07,758 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [39] imperfect sequences [] total 39 [2022-03-18 00:46:07,758 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1219331739] [2022-03-18 00:46:07,758 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:46:07,758 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-03-18 00:46:07,758 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:46:07,758 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-03-18 00:46:07,759 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=1407, Unknown=0, NotChecked=0, Total=1482 [2022-03-18 00:46:07,759 INFO L87 Difference]: Start difference. First operand 118 states and 119 transitions. Second operand has 39 states, 39 states have (on average 2.871794871794872) internal successors, (112), 38 states have internal predecessors, (112), 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) [2022-03-18 00:46:09,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:46:09,489 INFO L93 Difference]: Finished difference Result 130 states and 134 transitions. [2022-03-18 00:46:09,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-03-18 00:46:09,489 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.871794871794872) internal successors, (112), 38 states have internal predecessors, (112), 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 116 [2022-03-18 00:46:09,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:46:09,490 INFO L225 Difference]: With dead ends: 130 [2022-03-18 00:46:09,490 INFO L226 Difference]: Without dead ends: 122 [2022-03-18 00:46:09,491 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 8 SyntacticMatches, 71 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 630 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=219, Invalid=5331, Unknown=0, NotChecked=0, Total=5550 [2022-03-18 00:46:09,491 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 83 mSDsluCounter, 182 mSDsCounter, 0 mSdLazyCounter, 4141 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 194 SdHoareTripleChecker+Invalid, 4180 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 4141 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-03-18 00:46:09,491 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [83 Valid, 194 Invalid, 4180 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 4141 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-03-18 00:46:09,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2022-03-18 00:46:09,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 121. [2022-03-18 00:46:09,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 116 states have (on average 1.0172413793103448) internal successors, (118), 116 states have internal predecessors, (118), 3 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) [2022-03-18 00:46:09,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 122 transitions. [2022-03-18 00:46:09,503 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 122 transitions. Word has length 116 [2022-03-18 00:46:09,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:46:09,503 INFO L478 AbstractCegarLoop]: Abstraction has 121 states and 122 transitions. [2022-03-18 00:46:09,503 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 2.871794871794872) internal successors, (112), 38 states have internal predecessors, (112), 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) [2022-03-18 00:46:09,503 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 122 transitions. [2022-03-18 00:46:09,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2022-03-18 00:46:09,504 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:46:09,504 INFO L500 BasicCegarLoop]: trace histogram [36, 36, 36, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:46:09,504 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2022-03-18 00:46:09,504 INFO L403 AbstractCegarLoop]: === Iteration 38 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:46:09,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:46:09,504 INFO L85 PathProgramCache]: Analyzing trace with hash -555100221, now seen corresponding path program 36 times [2022-03-18 00:46:09,504 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:46:09,504 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1711915663] [2022-03-18 00:46:09,587 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-18 00:46:09,588 INFO L85 PathProgramCache]: Analyzing trace with hash 859533584, now seen corresponding path program 1 times [2022-03-18 00:46:09,588 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:46:09,588 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1027398162] [2022-03-18 00:46:09,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:46:09,588 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:46:09,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:46:09,612 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:46:09,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:46:09,615 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:46:09,615 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:46:09,615 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1027398162] [2022-03-18 00:46:09,615 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1027398162] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:46:09,615 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:46:09,615 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-18 00:46:10,971 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:46:10,971 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1711915663] [2022-03-18 00:46:10,972 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1711915663] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:46:10,972 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:46:10,972 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [40] imperfect sequences [] total 40 [2022-03-18 00:46:10,972 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [580938770] [2022-03-18 00:46:10,972 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:46:10,972 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-03-18 00:46:10,972 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:46:10,972 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-03-18 00:46:10,973 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=1483, Unknown=0, NotChecked=0, Total=1560 [2022-03-18 00:46:10,973 INFO L87 Difference]: Start difference. First operand 121 states and 122 transitions. Second operand has 40 states, 40 states have (on average 2.875) internal successors, (115), 39 states have internal predecessors, (115), 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) [2022-03-18 00:46:12,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:46:12,709 INFO L93 Difference]: Finished difference Result 133 states and 137 transitions. [2022-03-18 00:46:12,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-03-18 00:46:12,710 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 2.875) internal successors, (115), 39 states have internal predecessors, (115), 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 119 [2022-03-18 00:46:12,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:46:12,710 INFO L225 Difference]: With dead ends: 133 [2022-03-18 00:46:12,710 INFO L226 Difference]: Without dead ends: 125 [2022-03-18 00:46:12,711 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 8 SyntacticMatches, 73 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 666 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=225, Invalid=5627, Unknown=0, NotChecked=0, Total=5852 [2022-03-18 00:46:12,711 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 85 mSDsluCounter, 187 mSDsCounter, 0 mSdLazyCounter, 4367 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 199 SdHoareTripleChecker+Invalid, 4407 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 4367 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-03-18 00:46:12,711 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [85 Valid, 199 Invalid, 4407 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 4367 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-03-18 00:46:12,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2022-03-18 00:46:12,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 124. [2022-03-18 00:46:12,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 119 states have (on average 1.0168067226890756) internal successors, (121), 119 states have internal predecessors, (121), 3 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) [2022-03-18 00:46:12,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 125 transitions. [2022-03-18 00:46:12,724 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 125 transitions. Word has length 119 [2022-03-18 00:46:12,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:46:12,724 INFO L478 AbstractCegarLoop]: Abstraction has 124 states and 125 transitions. [2022-03-18 00:46:12,724 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 2.875) internal successors, (115), 39 states have internal predecessors, (115), 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) [2022-03-18 00:46:12,725 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 125 transitions. [2022-03-18 00:46:12,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2022-03-18 00:46:12,725 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:46:12,725 INFO L500 BasicCegarLoop]: trace histogram [37, 37, 37, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:46:12,725 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2022-03-18 00:46:12,725 INFO L403 AbstractCegarLoop]: === Iteration 39 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:46:12,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:46:12,725 INFO L85 PathProgramCache]: Analyzing trace with hash 1218199435, now seen corresponding path program 37 times [2022-03-18 00:46:12,725 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:46:12,725 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1332460862] [2022-03-18 00:46:12,843 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-18 00:46:12,844 INFO L85 PathProgramCache]: Analyzing trace with hash 918638928, now seen corresponding path program 1 times [2022-03-18 00:46:12,844 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:46:12,844 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [965463032] [2022-03-18 00:46:12,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:46:12,844 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:46:12,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:46:12,862 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:46:12,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:46:12,867 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:46:12,868 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:46:12,868 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [965463032] [2022-03-18 00:46:12,868 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [965463032] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:46:12,868 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:46:12,868 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-18 00:46:14,308 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:46:14,308 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1332460862] [2022-03-18 00:46:14,308 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1332460862] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:46:14,308 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:46:14,308 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [41] imperfect sequences [] total 41 [2022-03-18 00:46:14,308 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [694925489] [2022-03-18 00:46:14,308 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:46:14,308 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-03-18 00:46:14,309 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:46:14,309 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-03-18 00:46:14,309 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=1561, Unknown=0, NotChecked=0, Total=1640 [2022-03-18 00:46:14,309 INFO L87 Difference]: Start difference. First operand 124 states and 125 transitions. Second operand has 41 states, 41 states have (on average 2.8780487804878048) internal successors, (118), 40 states have internal predecessors, (118), 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) [2022-03-18 00:46:16,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:46:16,155 INFO L93 Difference]: Finished difference Result 136 states and 140 transitions. [2022-03-18 00:46:16,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-03-18 00:46:16,156 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 2.8780487804878048) internal successors, (118), 40 states have internal predecessors, (118), 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 122 [2022-03-18 00:46:16,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:46:16,156 INFO L225 Difference]: With dead ends: 136 [2022-03-18 00:46:16,156 INFO L226 Difference]: Without dead ends: 128 [2022-03-18 00:46:16,157 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 8 SyntacticMatches, 75 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 703 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=231, Invalid=5931, Unknown=0, NotChecked=0, Total=6162 [2022-03-18 00:46:16,157 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 87 mSDsluCounter, 192 mSDsCounter, 0 mSdLazyCounter, 4599 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 204 SdHoareTripleChecker+Invalid, 4640 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 4599 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-03-18 00:46:16,157 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [87 Valid, 204 Invalid, 4640 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 4599 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-03-18 00:46:16,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2022-03-18 00:46:16,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 127. [2022-03-18 00:46:16,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127 states, 122 states have (on average 1.0163934426229508) internal successors, (124), 122 states have internal predecessors, (124), 3 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) [2022-03-18 00:46:16,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 128 transitions. [2022-03-18 00:46:16,171 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 128 transitions. Word has length 122 [2022-03-18 00:46:16,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:46:16,171 INFO L478 AbstractCegarLoop]: Abstraction has 127 states and 128 transitions. [2022-03-18 00:46:16,171 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 2.8780487804878048) internal successors, (118), 40 states have internal predecessors, (118), 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) [2022-03-18 00:46:16,171 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 128 transitions. [2022-03-18 00:46:16,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2022-03-18 00:46:16,171 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:46:16,172 INFO L500 BasicCegarLoop]: trace histogram [38, 38, 38, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:46:16,172 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2022-03-18 00:46:16,172 INFO L403 AbstractCegarLoop]: === Iteration 40 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:46:16,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:46:16,172 INFO L85 PathProgramCache]: Analyzing trace with hash 1490510531, now seen corresponding path program 38 times [2022-03-18 00:46:16,172 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:46:16,172 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1190433099] [2022-03-18 00:46:16,280 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-18 00:46:16,280 INFO L85 PathProgramCache]: Analyzing trace with hash 977744272, now seen corresponding path program 1 times [2022-03-18 00:46:16,280 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:46:16,280 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1438769540] [2022-03-18 00:46:16,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:46:16,281 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:46:16,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:46:16,295 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:46:16,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:46:16,309 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:46:16,310 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:46:16,310 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1438769540] [2022-03-18 00:46:16,310 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1438769540] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:46:16,310 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:46:16,310 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-18 00:46:17,798 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:46:17,798 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1190433099] [2022-03-18 00:46:17,798 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1190433099] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:46:17,798 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:46:17,798 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [42] imperfect sequences [] total 42 [2022-03-18 00:46:17,798 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [904102755] [2022-03-18 00:46:17,798 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:46:17,799 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-03-18 00:46:17,799 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:46:17,799 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-03-18 00:46:17,799 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=1641, Unknown=0, NotChecked=0, Total=1722 [2022-03-18 00:46:17,799 INFO L87 Difference]: Start difference. First operand 127 states and 128 transitions. Second operand has 42 states, 42 states have (on average 2.880952380952381) internal successors, (121), 41 states have internal predecessors, (121), 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) [2022-03-18 00:46:19,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:46:19,705 INFO L93 Difference]: Finished difference Result 139 states and 143 transitions. [2022-03-18 00:46:19,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-03-18 00:46:19,705 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 2.880952380952381) internal successors, (121), 41 states have internal predecessors, (121), 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 125 [2022-03-18 00:46:19,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:46:19,705 INFO L225 Difference]: With dead ends: 139 [2022-03-18 00:46:19,706 INFO L226 Difference]: Without dead ends: 131 [2022-03-18 00:46:19,720 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 8 SyntacticMatches, 77 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 741 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=237, Invalid=6243, Unknown=0, NotChecked=0, Total=6480 [2022-03-18 00:46:19,720 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 89 mSDsluCounter, 197 mSDsCounter, 0 mSdLazyCounter, 4837 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 209 SdHoareTripleChecker+Invalid, 4879 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 4837 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-03-18 00:46:19,720 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [89 Valid, 209 Invalid, 4879 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 4837 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-03-18 00:46:19,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2022-03-18 00:46:19,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 130. [2022-03-18 00:46:19,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130 states, 125 states have (on average 1.016) internal successors, (127), 125 states have internal predecessors, (127), 3 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) [2022-03-18 00:46:19,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 131 transitions. [2022-03-18 00:46:19,741 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 131 transitions. Word has length 125 [2022-03-18 00:46:19,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:46:19,741 INFO L478 AbstractCegarLoop]: Abstraction has 130 states and 131 transitions. [2022-03-18 00:46:19,741 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 2.880952380952381) internal successors, (121), 41 states have internal predecessors, (121), 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) [2022-03-18 00:46:19,741 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 131 transitions. [2022-03-18 00:46:19,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2022-03-18 00:46:19,741 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:46:19,742 INFO L500 BasicCegarLoop]: trace histogram [39, 39, 39, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:46:19,742 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2022-03-18 00:46:19,742 INFO L403 AbstractCegarLoop]: === Iteration 41 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:46:19,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:46:19,742 INFO L85 PathProgramCache]: Analyzing trace with hash 717149323, now seen corresponding path program 39 times [2022-03-18 00:46:19,742 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:46:19,742 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [480655179] [2022-03-18 00:46:19,851 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-18 00:46:19,851 INFO L85 PathProgramCache]: Analyzing trace with hash 1036849616, now seen corresponding path program 1 times [2022-03-18 00:46:19,851 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:46:19,851 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [770924912] [2022-03-18 00:46:19,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:46:19,851 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:46:19,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:46:19,864 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:46:19,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:46:19,866 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:46:19,866 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:46:19,867 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [770924912] [2022-03-18 00:46:19,867 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [770924912] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:46:19,867 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:46:19,867 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-18 00:46:21,424 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:46:21,424 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [480655179] [2022-03-18 00:46:21,424 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [480655179] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:46:21,424 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:46:21,424 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [43] imperfect sequences [] total 43 [2022-03-18 00:46:21,424 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1469894770] [2022-03-18 00:46:21,424 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:46:21,424 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-03-18 00:46:21,425 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:46:21,425 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-03-18 00:46:21,425 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=1723, Unknown=0, NotChecked=0, Total=1806 [2022-03-18 00:46:21,425 INFO L87 Difference]: Start difference. First operand 130 states and 131 transitions. Second operand has 43 states, 43 states have (on average 2.883720930232558) internal successors, (124), 42 states have internal predecessors, (124), 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) [2022-03-18 00:46:23,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:46:23,392 INFO L93 Difference]: Finished difference Result 142 states and 146 transitions. [2022-03-18 00:46:23,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-03-18 00:46:23,392 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 2.883720930232558) internal successors, (124), 42 states have internal predecessors, (124), 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 128 [2022-03-18 00:46:23,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:46:23,393 INFO L225 Difference]: With dead ends: 142 [2022-03-18 00:46:23,393 INFO L226 Difference]: Without dead ends: 134 [2022-03-18 00:46:23,394 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 8 SyntacticMatches, 79 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 780 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=243, Invalid=6563, Unknown=0, NotChecked=0, Total=6806 [2022-03-18 00:46:23,394 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 91 mSDsluCounter, 202 mSDsCounter, 0 mSdLazyCounter, 5081 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 214 SdHoareTripleChecker+Invalid, 5124 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 5081 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-03-18 00:46:23,394 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [91 Valid, 214 Invalid, 5124 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 5081 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-03-18 00:46:23,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2022-03-18 00:46:23,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 133. [2022-03-18 00:46:23,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 128 states have (on average 1.015625) internal successors, (130), 128 states have internal predecessors, (130), 3 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) [2022-03-18 00:46:23,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 134 transitions. [2022-03-18 00:46:23,409 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 134 transitions. Word has length 128 [2022-03-18 00:46:23,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:46:23,409 INFO L478 AbstractCegarLoop]: Abstraction has 133 states and 134 transitions. [2022-03-18 00:46:23,409 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 2.883720930232558) internal successors, (124), 42 states have internal predecessors, (124), 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) [2022-03-18 00:46:23,409 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 134 transitions. [2022-03-18 00:46:23,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2022-03-18 00:46:23,410 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:46:23,410 INFO L500 BasicCegarLoop]: trace histogram [40, 40, 40, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:46:23,410 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2022-03-18 00:46:23,410 INFO L403 AbstractCegarLoop]: === Iteration 42 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:46:23,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:46:23,410 INFO L85 PathProgramCache]: Analyzing trace with hash -282022461, now seen corresponding path program 40 times [2022-03-18 00:46:23,410 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:46:23,410 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2094828187] [2022-03-18 00:46:23,494 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-18 00:46:23,494 INFO L85 PathProgramCache]: Analyzing trace with hash 1095954960, now seen corresponding path program 1 times [2022-03-18 00:46:23,494 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:46:23,494 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [584312002] [2022-03-18 00:46:23,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:46:23,495 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:46:23,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:46:23,508 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:46:23,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:46:23,511 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:46:23,511 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:46:23,511 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [584312002] [2022-03-18 00:46:23,511 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [584312002] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:46:23,511 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:46:23,512 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-18 00:46:25,204 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:46:25,204 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2094828187] [2022-03-18 00:46:25,204 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2094828187] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:46:25,205 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:46:25,205 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [44] imperfect sequences [] total 44 [2022-03-18 00:46:25,205 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [797199373] [2022-03-18 00:46:25,205 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:46:25,205 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-03-18 00:46:25,205 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:46:25,205 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-03-18 00:46:25,206 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=1807, Unknown=0, NotChecked=0, Total=1892 [2022-03-18 00:46:25,206 INFO L87 Difference]: Start difference. First operand 133 states and 134 transitions. Second operand has 44 states, 44 states have (on average 2.8863636363636362) internal successors, (127), 43 states have internal predecessors, (127), 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) [2022-03-18 00:46:27,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:46:27,294 INFO L93 Difference]: Finished difference Result 145 states and 149 transitions. [2022-03-18 00:46:27,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-03-18 00:46:27,294 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 2.8863636363636362) internal successors, (127), 43 states have internal predecessors, (127), 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 131 [2022-03-18 00:46:27,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:46:27,295 INFO L225 Difference]: With dead ends: 145 [2022-03-18 00:46:27,295 INFO L226 Difference]: Without dead ends: 137 [2022-03-18 00:46:27,295 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 8 SyntacticMatches, 81 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 820 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=249, Invalid=6891, Unknown=0, NotChecked=0, Total=7140 [2022-03-18 00:46:27,296 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 93 mSDsluCounter, 207 mSDsCounter, 0 mSdLazyCounter, 5331 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 219 SdHoareTripleChecker+Invalid, 5375 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 5331 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-03-18 00:46:27,296 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [93 Valid, 219 Invalid, 5375 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 5331 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-03-18 00:46:27,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2022-03-18 00:46:27,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 136. [2022-03-18 00:46:27,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 131 states have (on average 1.015267175572519) internal successors, (133), 131 states have internal predecessors, (133), 3 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) [2022-03-18 00:46:27,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 137 transitions. [2022-03-18 00:46:27,311 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 137 transitions. Word has length 131 [2022-03-18 00:46:27,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:46:27,311 INFO L478 AbstractCegarLoop]: Abstraction has 136 states and 137 transitions. [2022-03-18 00:46:27,312 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 2.8863636363636362) internal successors, (127), 43 states have internal predecessors, (127), 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) [2022-03-18 00:46:27,312 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 137 transitions. [2022-03-18 00:46:27,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2022-03-18 00:46:27,315 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:46:27,315 INFO L500 BasicCegarLoop]: trace histogram [41, 41, 41, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:46:27,315 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2022-03-18 00:46:27,315 INFO L403 AbstractCegarLoop]: === Iteration 43 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:46:27,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:46:27,315 INFO L85 PathProgramCache]: Analyzing trace with hash 1809688971, now seen corresponding path program 41 times [2022-03-18 00:46:27,315 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:46:27,315 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1454773520] [2022-03-18 00:46:27,392 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-18 00:46:27,393 INFO L85 PathProgramCache]: Analyzing trace with hash 1155060304, now seen corresponding path program 1 times [2022-03-18 00:46:27,393 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:46:27,393 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1072564449] [2022-03-18 00:46:27,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:46:27,393 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:46:27,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:46:27,415 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:46:27,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:46:27,418 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:46:27,418 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:46:27,418 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1072564449] [2022-03-18 00:46:27,418 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1072564449] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:46:27,418 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:46:27,418 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-18 00:46:29,119 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:46:29,119 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1454773520] [2022-03-18 00:46:29,119 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1454773520] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:46:29,119 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:46:29,119 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [45] imperfect sequences [] total 45 [2022-03-18 00:46:29,119 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [891228518] [2022-03-18 00:46:29,119 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:46:29,120 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-03-18 00:46:29,120 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:46:29,120 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-03-18 00:46:29,120 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=1893, Unknown=0, NotChecked=0, Total=1980 [2022-03-18 00:46:29,120 INFO L87 Difference]: Start difference. First operand 136 states and 137 transitions. Second operand has 45 states, 45 states have (on average 2.888888888888889) internal successors, (130), 44 states have internal predecessors, (130), 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) [2022-03-18 00:46:31,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:46:31,301 INFO L93 Difference]: Finished difference Result 148 states and 152 transitions. [2022-03-18 00:46:31,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-03-18 00:46:31,302 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 2.888888888888889) internal successors, (130), 44 states have internal predecessors, (130), 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 134 [2022-03-18 00:46:31,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:46:31,303 INFO L225 Difference]: With dead ends: 148 [2022-03-18 00:46:31,303 INFO L226 Difference]: Without dead ends: 140 [2022-03-18 00:46:31,303 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 8 SyntacticMatches, 83 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 861 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=255, Invalid=7227, Unknown=0, NotChecked=0, Total=7482 [2022-03-18 00:46:31,303 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 95 mSDsluCounter, 212 mSDsCounter, 0 mSdLazyCounter, 5587 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 95 SdHoareTripleChecker+Valid, 224 SdHoareTripleChecker+Invalid, 5632 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 5587 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-03-18 00:46:31,303 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [95 Valid, 224 Invalid, 5632 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 5587 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-03-18 00:46:31,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2022-03-18 00:46:31,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 139. [2022-03-18 00:46:31,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139 states, 134 states have (on average 1.0149253731343284) internal successors, (136), 134 states have internal predecessors, (136), 3 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) [2022-03-18 00:46:31,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 140 transitions. [2022-03-18 00:46:31,319 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 140 transitions. Word has length 134 [2022-03-18 00:46:31,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:46:31,320 INFO L478 AbstractCegarLoop]: Abstraction has 139 states and 140 transitions. [2022-03-18 00:46:31,320 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 2.888888888888889) internal successors, (130), 44 states have internal predecessors, (130), 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) [2022-03-18 00:46:31,320 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 140 transitions. [2022-03-18 00:46:31,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2022-03-18 00:46:31,320 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:46:31,320 INFO L500 BasicCegarLoop]: trace histogram [42, 42, 42, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:46:31,320 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2022-03-18 00:46:31,320 INFO L403 AbstractCegarLoop]: === Iteration 44 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:46:31,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:46:31,321 INFO L85 PathProgramCache]: Analyzing trace with hash 304462019, now seen corresponding path program 42 times [2022-03-18 00:46:31,321 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:46:31,321 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1584437983] [2022-03-18 00:46:31,427 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-18 00:46:31,427 INFO L85 PathProgramCache]: Analyzing trace with hash 1214165648, now seen corresponding path program 1 times [2022-03-18 00:46:31,427 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:46:31,427 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [470720677] [2022-03-18 00:46:31,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:46:31,427 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:46:31,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:46:31,449 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:46:31,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:46:31,451 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:46:31,451 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:46:31,452 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [470720677] [2022-03-18 00:46:31,452 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [470720677] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:46:31,452 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:46:31,452 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-18 00:46:33,230 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:46:33,231 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1584437983] [2022-03-18 00:46:33,231 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1584437983] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:46:33,231 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:46:33,231 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [46] imperfect sequences [] total 46 [2022-03-18 00:46:33,231 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1001150558] [2022-03-18 00:46:33,231 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:46:33,238 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-03-18 00:46:33,238 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:46:33,238 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-03-18 00:46:33,238 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=1981, Unknown=0, NotChecked=0, Total=2070 [2022-03-18 00:46:33,239 INFO L87 Difference]: Start difference. First operand 139 states and 140 transitions. Second operand has 46 states, 46 states have (on average 2.891304347826087) internal successors, (133), 45 states have internal predecessors, (133), 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) [2022-03-18 00:46:35,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:46:35,502 INFO L93 Difference]: Finished difference Result 151 states and 155 transitions. [2022-03-18 00:46:35,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-03-18 00:46:35,502 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 2.891304347826087) internal successors, (133), 45 states have internal predecessors, (133), 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 137 [2022-03-18 00:46:35,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:46:35,503 INFO L225 Difference]: With dead ends: 151 [2022-03-18 00:46:35,503 INFO L226 Difference]: Without dead ends: 143 [2022-03-18 00:46:35,504 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 8 SyntacticMatches, 85 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 903 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=261, Invalid=7571, Unknown=0, NotChecked=0, Total=7832 [2022-03-18 00:46:35,504 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 97 mSDsluCounter, 217 mSDsCounter, 0 mSdLazyCounter, 5849 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 97 SdHoareTripleChecker+Valid, 229 SdHoareTripleChecker+Invalid, 5895 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 5849 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-03-18 00:46:35,504 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [97 Valid, 229 Invalid, 5895 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 5849 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-03-18 00:46:35,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2022-03-18 00:46:35,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 142. [2022-03-18 00:46:35,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 137 states have (on average 1.0145985401459854) internal successors, (139), 137 states have internal predecessors, (139), 3 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) [2022-03-18 00:46:35,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 143 transitions. [2022-03-18 00:46:35,520 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 143 transitions. Word has length 137 [2022-03-18 00:46:35,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:46:35,520 INFO L478 AbstractCegarLoop]: Abstraction has 142 states and 143 transitions. [2022-03-18 00:46:35,520 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 2.891304347826087) internal successors, (133), 45 states have internal predecessors, (133), 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) [2022-03-18 00:46:35,520 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 143 transitions. [2022-03-18 00:46:35,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2022-03-18 00:46:35,521 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:46:35,521 INFO L500 BasicCegarLoop]: trace histogram [43, 43, 43, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:46:35,521 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2022-03-18 00:46:35,521 INFO L403 AbstractCegarLoop]: === Iteration 45 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:46:35,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:46:35,521 INFO L85 PathProgramCache]: Analyzing trace with hash 1841872523, now seen corresponding path program 43 times [2022-03-18 00:46:35,521 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:46:35,521 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [63728573] [2022-03-18 00:46:35,635 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-18 00:46:35,636 INFO L85 PathProgramCache]: Analyzing trace with hash 1273270992, now seen corresponding path program 1 times [2022-03-18 00:46:35,636 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:46:35,636 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1402130746] [2022-03-18 00:46:35,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:46:35,636 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:46:35,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:46:35,653 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:46:35,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:46:35,658 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:46:35,659 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:46:35,659 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1402130746] [2022-03-18 00:46:35,659 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1402130746] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:46:35,659 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:46:35,659 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-18 00:46:37,525 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:46:37,526 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [63728573] [2022-03-18 00:46:37,526 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [63728573] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:46:37,526 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:46:37,526 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [47] imperfect sequences [] total 47 [2022-03-18 00:46:37,526 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [287620666] [2022-03-18 00:46:37,526 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:46:37,526 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2022-03-18 00:46:37,526 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:46:37,526 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2022-03-18 00:46:37,527 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=2071, Unknown=0, NotChecked=0, Total=2162 [2022-03-18 00:46:37,527 INFO L87 Difference]: Start difference. First operand 142 states and 143 transitions. Second operand has 47 states, 47 states have (on average 2.893617021276596) internal successors, (136), 46 states have internal predecessors, (136), 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) [2022-03-18 00:46:40,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:46:40,248 INFO L93 Difference]: Finished difference Result 154 states and 158 transitions. [2022-03-18 00:46:40,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2022-03-18 00:46:40,249 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 2.893617021276596) internal successors, (136), 46 states have internal predecessors, (136), 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 140 [2022-03-18 00:46:40,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:46:40,249 INFO L225 Difference]: With dead ends: 154 [2022-03-18 00:46:40,249 INFO L226 Difference]: Without dead ends: 146 [2022-03-18 00:46:40,250 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 8 SyntacticMatches, 87 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 946 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=267, Invalid=7923, Unknown=0, NotChecked=0, Total=8190 [2022-03-18 00:46:40,250 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 99 mSDsluCounter, 222 mSDsCounter, 0 mSdLazyCounter, 6117 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 234 SdHoareTripleChecker+Invalid, 6164 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 6117 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-03-18 00:46:40,250 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [99 Valid, 234 Invalid, 6164 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 6117 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2022-03-18 00:46:40,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2022-03-18 00:46:40,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 145. [2022-03-18 00:46:40,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 140 states have (on average 1.0142857142857142) internal successors, (142), 140 states have internal predecessors, (142), 3 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) [2022-03-18 00:46:40,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 146 transitions. [2022-03-18 00:46:40,267 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 146 transitions. Word has length 140 [2022-03-18 00:46:40,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:46:40,268 INFO L478 AbstractCegarLoop]: Abstraction has 145 states and 146 transitions. [2022-03-18 00:46:40,268 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 2.893617021276596) internal successors, (136), 46 states have internal predecessors, (136), 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) [2022-03-18 00:46:40,268 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 146 transitions. [2022-03-18 00:46:40,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2022-03-18 00:46:40,268 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:46:40,268 INFO L500 BasicCegarLoop]: trace histogram [44, 44, 44, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:46:40,268 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2022-03-18 00:46:40,268 INFO L403 AbstractCegarLoop]: === Iteration 46 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:46:40,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:46:40,269 INFO L85 PathProgramCache]: Analyzing trace with hash 1306952643, now seen corresponding path program 44 times [2022-03-18 00:46:40,269 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:46:40,269 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1442937328] [2022-03-18 00:46:40,393 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-18 00:46:40,393 INFO L85 PathProgramCache]: Analyzing trace with hash 1332376336, now seen corresponding path program 1 times [2022-03-18 00:46:40,394 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:46:40,394 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [974486093] [2022-03-18 00:46:40,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:46:40,394 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:46:40,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:46:40,407 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:46:40,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:46:40,419 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:46:40,419 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:46:40,419 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [974486093] [2022-03-18 00:46:40,419 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [974486093] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:46:40,419 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:46:40,419 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-18 00:46:42,541 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:46:42,542 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1442937328] [2022-03-18 00:46:42,542 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1442937328] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:46:42,542 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:46:42,542 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [48] imperfect sequences [] total 48 [2022-03-18 00:46:42,542 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1608815984] [2022-03-18 00:46:42,542 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:46:42,542 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2022-03-18 00:46:42,542 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:46:42,543 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2022-03-18 00:46:42,543 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=2163, Unknown=0, NotChecked=0, Total=2256 [2022-03-18 00:46:42,543 INFO L87 Difference]: Start difference. First operand 145 states and 146 transitions. Second operand has 48 states, 48 states have (on average 2.8958333333333335) internal successors, (139), 47 states have internal predecessors, (139), 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) [2022-03-18 00:46:45,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:46:45,166 INFO L93 Difference]: Finished difference Result 157 states and 161 transitions. [2022-03-18 00:46:45,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-03-18 00:46:45,167 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 2.8958333333333335) internal successors, (139), 47 states have internal predecessors, (139), 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 143 [2022-03-18 00:46:45,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:46:45,167 INFO L225 Difference]: With dead ends: 157 [2022-03-18 00:46:45,167 INFO L226 Difference]: Without dead ends: 149 [2022-03-18 00:46:45,168 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 8 SyntacticMatches, 89 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 990 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=273, Invalid=8283, Unknown=0, NotChecked=0, Total=8556 [2022-03-18 00:46:45,169 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 101 mSDsluCounter, 227 mSDsCounter, 0 mSdLazyCounter, 6391 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 239 SdHoareTripleChecker+Invalid, 6439 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 6391 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-03-18 00:46:45,169 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [101 Valid, 239 Invalid, 6439 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 6391 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2022-03-18 00:46:45,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2022-03-18 00:46:45,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 148. [2022-03-18 00:46:45,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 143 states have (on average 1.013986013986014) internal successors, (145), 143 states have internal predecessors, (145), 3 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) [2022-03-18 00:46:45,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 149 transitions. [2022-03-18 00:46:45,192 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 149 transitions. Word has length 143 [2022-03-18 00:46:45,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:46:45,192 INFO L478 AbstractCegarLoop]: Abstraction has 148 states and 149 transitions. [2022-03-18 00:46:45,192 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 2.8958333333333335) internal successors, (139), 47 states have internal predecessors, (139), 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) [2022-03-18 00:46:45,192 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 149 transitions. [2022-03-18 00:46:45,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2022-03-18 00:46:45,193 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:46:45,193 INFO L500 BasicCegarLoop]: trace histogram [45, 45, 45, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:46:45,193 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2022-03-18 00:46:45,193 INFO L403 AbstractCegarLoop]: === Iteration 47 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:46:45,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:46:45,193 INFO L85 PathProgramCache]: Analyzing trace with hash -162524277, now seen corresponding path program 45 times [2022-03-18 00:46:45,193 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:46:45,193 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2107510077] [2022-03-18 00:46:45,275 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-18 00:46:45,276 INFO L85 PathProgramCache]: Analyzing trace with hash 1391481680, now seen corresponding path program 1 times [2022-03-18 00:46:45,276 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:46:45,276 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [436542683] [2022-03-18 00:46:45,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:46:45,276 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:46:45,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:46:45,289 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:46:45,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:46:45,291 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:46:45,291 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:46:45,291 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [436542683] [2022-03-18 00:46:45,291 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [436542683] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:46:45,291 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:46:45,291 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-18 00:46:47,313 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:46:47,313 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2107510077] [2022-03-18 00:46:47,313 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2107510077] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:46:47,313 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:46:47,313 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [49] imperfect sequences [] total 49 [2022-03-18 00:46:47,313 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1679569943] [2022-03-18 00:46:47,313 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:46:47,313 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2022-03-18 00:46:47,313 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:46:47,314 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2022-03-18 00:46:47,314 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=2257, Unknown=0, NotChecked=0, Total=2352 [2022-03-18 00:46:47,314 INFO L87 Difference]: Start difference. First operand 148 states and 149 transitions. Second operand has 49 states, 49 states have (on average 2.8979591836734695) internal successors, (142), 48 states have internal predecessors, (142), 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) [2022-03-18 00:46:49,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:46:49,893 INFO L93 Difference]: Finished difference Result 160 states and 164 transitions. [2022-03-18 00:46:49,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-03-18 00:46:49,894 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 2.8979591836734695) internal successors, (142), 48 states have internal predecessors, (142), 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 146 [2022-03-18 00:46:49,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:46:49,894 INFO L225 Difference]: With dead ends: 160 [2022-03-18 00:46:49,894 INFO L226 Difference]: Without dead ends: 152 [2022-03-18 00:46:49,895 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 8 SyntacticMatches, 91 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1035 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=279, Invalid=8651, Unknown=0, NotChecked=0, Total=8930 [2022-03-18 00:46:49,895 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 103 mSDsluCounter, 232 mSDsCounter, 0 mSdLazyCounter, 6671 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 103 SdHoareTripleChecker+Valid, 244 SdHoareTripleChecker+Invalid, 6720 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 6671 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-03-18 00:46:49,895 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [103 Valid, 244 Invalid, 6720 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 6671 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-03-18 00:46:49,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2022-03-18 00:46:49,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 151. [2022-03-18 00:46:49,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 146 states have (on average 1.0136986301369864) internal successors, (148), 146 states have internal predecessors, (148), 3 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) [2022-03-18 00:46:49,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 152 transitions. [2022-03-18 00:46:49,920 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 152 transitions. Word has length 146 [2022-03-18 00:46:49,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:46:49,921 INFO L478 AbstractCegarLoop]: Abstraction has 151 states and 152 transitions. [2022-03-18 00:46:49,921 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 2.8979591836734695) internal successors, (142), 48 states have internal predecessors, (142), 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) [2022-03-18 00:46:49,921 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 152 transitions. [2022-03-18 00:46:49,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2022-03-18 00:46:49,921 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:46:49,921 INFO L500 BasicCegarLoop]: trace histogram [46, 46, 46, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:46:49,921 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2022-03-18 00:46:49,921 INFO L403 AbstractCegarLoop]: === Iteration 48 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:46:49,922 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:46:49,922 INFO L85 PathProgramCache]: Analyzing trace with hash 1252200131, now seen corresponding path program 46 times [2022-03-18 00:46:49,922 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:46:49,922 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1892014079] [2022-03-18 00:46:49,999 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-18 00:46:49,999 INFO L85 PathProgramCache]: Analyzing trace with hash 1450587024, now seen corresponding path program 1 times [2022-03-18 00:46:49,999 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:46:50,000 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [205749088] [2022-03-18 00:46:50,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:46:50,000 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:46:50,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:46:50,025 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:46:50,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:46:50,030 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:46:50,030 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:46:50,030 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [205749088] [2022-03-18 00:46:50,030 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [205749088] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:46:50,030 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:46:50,030 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-18 00:46:52,122 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:46:52,122 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1892014079] [2022-03-18 00:46:52,122 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1892014079] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:46:52,122 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:46:52,122 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [50] imperfect sequences [] total 50 [2022-03-18 00:46:52,122 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1673836942] [2022-03-18 00:46:52,122 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:46:52,123 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2022-03-18 00:46:52,123 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:46:52,123 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2022-03-18 00:46:52,123 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=2353, Unknown=0, NotChecked=0, Total=2450 [2022-03-18 00:46:52,123 INFO L87 Difference]: Start difference. First operand 151 states and 152 transitions. Second operand has 50 states, 50 states have (on average 2.9) internal successors, (145), 49 states have internal predecessors, (145), 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) [2022-03-18 00:46:55,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:46:55,132 INFO L93 Difference]: Finished difference Result 163 states and 167 transitions. [2022-03-18 00:46:55,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-03-18 00:46:55,133 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 2.9) internal successors, (145), 49 states have internal predecessors, (145), 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 149 [2022-03-18 00:46:55,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:46:55,133 INFO L225 Difference]: With dead ends: 163 [2022-03-18 00:46:55,134 INFO L226 Difference]: Without dead ends: 155 [2022-03-18 00:46:55,134 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 8 SyntacticMatches, 93 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1081 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=285, Invalid=9027, Unknown=0, NotChecked=0, Total=9312 [2022-03-18 00:46:55,135 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 105 mSDsluCounter, 237 mSDsCounter, 0 mSdLazyCounter, 6957 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 249 SdHoareTripleChecker+Invalid, 7007 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 6957 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-03-18 00:46:55,135 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [105 Valid, 249 Invalid, 7007 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 6957 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2022-03-18 00:46:55,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2022-03-18 00:46:55,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 154. [2022-03-18 00:46:55,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 154 states, 149 states have (on average 1.0134228187919463) internal successors, (151), 149 states have internal predecessors, (151), 3 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) [2022-03-18 00:46:55,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 155 transitions. [2022-03-18 00:46:55,159 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 155 transitions. Word has length 149 [2022-03-18 00:46:55,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:46:55,159 INFO L478 AbstractCegarLoop]: Abstraction has 154 states and 155 transitions. [2022-03-18 00:46:55,159 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 2.9) internal successors, (145), 49 states have internal predecessors, (145), 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) [2022-03-18 00:46:55,159 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 155 transitions. [2022-03-18 00:46:55,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2022-03-18 00:46:55,160 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:46:55,160 INFO L500 BasicCegarLoop]: trace histogram [47, 47, 47, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:46:55,160 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2022-03-18 00:46:55,160 INFO L403 AbstractCegarLoop]: === Iteration 49 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:46:55,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:46:55,161 INFO L85 PathProgramCache]: Analyzing trace with hash 792963211, now seen corresponding path program 47 times [2022-03-18 00:46:55,161 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:46:55,161 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [780808520] [2022-03-18 00:46:55,269 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-18 00:46:55,269 INFO L85 PathProgramCache]: Analyzing trace with hash 1509692368, now seen corresponding path program 1 times [2022-03-18 00:46:55,269 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:46:55,269 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1395475485] [2022-03-18 00:46:55,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:46:55,270 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:46:55,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:46:55,290 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:46:55,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:46:55,294 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:46:55,294 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:46:55,294 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1395475485] [2022-03-18 00:46:55,294 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1395475485] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:46:55,294 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:46:55,294 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-18 00:46:57,617 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:46:57,617 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [780808520] [2022-03-18 00:46:57,617 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [780808520] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:46:57,617 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:46:57,617 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [51] imperfect sequences [] total 51 [2022-03-18 00:46:57,617 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [707965354] [2022-03-18 00:46:57,617 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:46:57,617 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2022-03-18 00:46:57,617 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:46:57,618 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2022-03-18 00:46:57,618 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=2451, Unknown=0, NotChecked=0, Total=2550 [2022-03-18 00:46:57,618 INFO L87 Difference]: Start difference. First operand 154 states and 155 transitions. Second operand has 51 states, 51 states have (on average 2.9019607843137254) internal successors, (148), 50 states have internal predecessors, (148), 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) [2022-03-18 00:47:00,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:47:00,372 INFO L93 Difference]: Finished difference Result 166 states and 170 transitions. [2022-03-18 00:47:00,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-03-18 00:47:00,373 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 2.9019607843137254) internal successors, (148), 50 states have internal predecessors, (148), 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 152 [2022-03-18 00:47:00,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:47:00,373 INFO L225 Difference]: With dead ends: 166 [2022-03-18 00:47:00,373 INFO L226 Difference]: Without dead ends: 158 [2022-03-18 00:47:00,374 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 8 SyntacticMatches, 95 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1128 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=291, Invalid=9411, Unknown=0, NotChecked=0, Total=9702 [2022-03-18 00:47:00,374 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 107 mSDsluCounter, 242 mSDsCounter, 0 mSdLazyCounter, 7249 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 107 SdHoareTripleChecker+Valid, 254 SdHoareTripleChecker+Invalid, 7300 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 7249 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-03-18 00:47:00,374 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [107 Valid, 254 Invalid, 7300 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 7249 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2022-03-18 00:47:00,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2022-03-18 00:47:00,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 157. [2022-03-18 00:47:00,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 157 states, 152 states have (on average 1.013157894736842) internal successors, (154), 152 states have internal predecessors, (154), 3 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) [2022-03-18 00:47:00,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 158 transitions. [2022-03-18 00:47:00,394 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 158 transitions. Word has length 152 [2022-03-18 00:47:00,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:47:00,394 INFO L478 AbstractCegarLoop]: Abstraction has 157 states and 158 transitions. [2022-03-18 00:47:00,394 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 2.9019607843137254) internal successors, (148), 50 states have internal predecessors, (148), 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) [2022-03-18 00:47:00,395 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 158 transitions. [2022-03-18 00:47:00,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2022-03-18 00:47:00,395 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:47:00,395 INFO L500 BasicCegarLoop]: trace histogram [48, 48, 48, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:47:00,395 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2022-03-18 00:47:00,397 INFO L403 AbstractCegarLoop]: === Iteration 50 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:47:00,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:47:00,397 INFO L85 PathProgramCache]: Analyzing trace with hash -863282749, now seen corresponding path program 48 times [2022-03-18 00:47:00,397 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:47:00,397 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [922587698] [2022-03-18 00:47:00,548 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-18 00:47:00,549 INFO L85 PathProgramCache]: Analyzing trace with hash 1568797712, now seen corresponding path program 1 times [2022-03-18 00:47:00,549 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:47:00,549 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [631073519] [2022-03-18 00:47:00,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:47:00,549 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:47:00,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:47:00,563 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:47:00,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:47:00,566 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:47:00,566 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:47:00,566 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [631073519] [2022-03-18 00:47:00,566 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [631073519] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:47:00,566 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:47:00,566 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-18 00:47:02,908 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:47:02,909 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [922587698] [2022-03-18 00:47:02,909 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [922587698] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:47:02,909 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:47:02,909 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [52] imperfect sequences [] total 52 [2022-03-18 00:47:02,909 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1436879188] [2022-03-18 00:47:02,909 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:47:02,909 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2022-03-18 00:47:02,909 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:47:02,909 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2022-03-18 00:47:02,910 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=2551, Unknown=0, NotChecked=0, Total=2652 [2022-03-18 00:47:02,910 INFO L87 Difference]: Start difference. First operand 157 states and 158 transitions. Second operand has 52 states, 52 states have (on average 2.9038461538461537) internal successors, (151), 51 states have internal predecessors, (151), 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) [2022-03-18 00:47:06,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:47:06,023 INFO L93 Difference]: Finished difference Result 169 states and 173 transitions. [2022-03-18 00:47:06,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2022-03-18 00:47:06,023 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 2.9038461538461537) internal successors, (151), 51 states have internal predecessors, (151), 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 155 [2022-03-18 00:47:06,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:47:06,024 INFO L225 Difference]: With dead ends: 169 [2022-03-18 00:47:06,024 INFO L226 Difference]: Without dead ends: 161 [2022-03-18 00:47:06,025 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 204 GetRequests, 8 SyntacticMatches, 97 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1176 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=297, Invalid=9803, Unknown=0, NotChecked=0, Total=10100 [2022-03-18 00:47:06,025 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 109 mSDsluCounter, 247 mSDsCounter, 0 mSdLazyCounter, 7547 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 109 SdHoareTripleChecker+Valid, 259 SdHoareTripleChecker+Invalid, 7599 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 7547 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2022-03-18 00:47:06,025 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [109 Valid, 259 Invalid, 7599 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 7547 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2022-03-18 00:47:06,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2022-03-18 00:47:06,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 160. [2022-03-18 00:47:06,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 155 states have (on average 1.0129032258064516) internal successors, (157), 155 states have internal predecessors, (157), 3 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) [2022-03-18 00:47:06,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 161 transitions. [2022-03-18 00:47:06,045 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 161 transitions. Word has length 155 [2022-03-18 00:47:06,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:47:06,045 INFO L478 AbstractCegarLoop]: Abstraction has 160 states and 161 transitions. [2022-03-18 00:47:06,045 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 52 states have (on average 2.9038461538461537) internal successors, (151), 51 states have internal predecessors, (151), 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) [2022-03-18 00:47:06,045 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 161 transitions. [2022-03-18 00:47:06,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2022-03-18 00:47:06,046 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:47:06,046 INFO L500 BasicCegarLoop]: trace histogram [49, 49, 49, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:47:06,046 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2022-03-18 00:47:06,046 INFO L403 AbstractCegarLoop]: === Iteration 51 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:47:06,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:47:06,046 INFO L85 PathProgramCache]: Analyzing trace with hash -1502380661, now seen corresponding path program 49 times [2022-03-18 00:47:06,046 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:47:06,046 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [313874523] [2022-03-18 00:47:06,179 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-18 00:47:06,179 INFO L85 PathProgramCache]: Analyzing trace with hash 1627903056, now seen corresponding path program 1 times [2022-03-18 00:47:06,179 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:47:06,179 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1299258500] [2022-03-18 00:47:06,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:47:06,179 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:47:06,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:47:06,198 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:47:06,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:47:06,205 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:47:06,205 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:47:06,205 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1299258500] [2022-03-18 00:47:06,205 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1299258500] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:47:06,205 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:47:06,205 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-18 00:47:08,600 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:47:08,601 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [313874523] [2022-03-18 00:47:08,601 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [313874523] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:47:08,601 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:47:08,601 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [53] imperfect sequences [] total 53 [2022-03-18 00:47:08,601 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [976506273] [2022-03-18 00:47:08,601 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:47:08,601 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2022-03-18 00:47:08,601 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:47:08,601 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2022-03-18 00:47:08,602 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=2653, Unknown=0, NotChecked=0, Total=2756 [2022-03-18 00:47:08,602 INFO L87 Difference]: Start difference. First operand 160 states and 161 transitions. Second operand has 53 states, 53 states have (on average 2.9056603773584904) internal successors, (154), 52 states have internal predecessors, (154), 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) [2022-03-18 00:47:11,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:47:11,844 INFO L93 Difference]: Finished difference Result 172 states and 176 transitions. [2022-03-18 00:47:11,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-03-18 00:47:11,844 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 2.9056603773584904) internal successors, (154), 52 states have internal predecessors, (154), 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 158 [2022-03-18 00:47:11,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:47:11,845 INFO L225 Difference]: With dead ends: 172 [2022-03-18 00:47:11,845 INFO L226 Difference]: Without dead ends: 164 [2022-03-18 00:47:11,846 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 208 GetRequests, 8 SyntacticMatches, 99 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1225 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=303, Invalid=10203, Unknown=0, NotChecked=0, Total=10506 [2022-03-18 00:47:11,846 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 111 mSDsluCounter, 252 mSDsCounter, 0 mSdLazyCounter, 7851 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 264 SdHoareTripleChecker+Invalid, 7904 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 7851 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-03-18 00:47:11,847 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [111 Valid, 264 Invalid, 7904 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 7851 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2022-03-18 00:47:11,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2022-03-18 00:47:11,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 163. [2022-03-18 00:47:11,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 163 states, 158 states have (on average 1.0126582278481013) internal successors, (160), 158 states have internal predecessors, (160), 3 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) [2022-03-18 00:47:11,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 164 transitions. [2022-03-18 00:47:11,873 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 164 transitions. Word has length 158 [2022-03-18 00:47:11,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:47:11,874 INFO L478 AbstractCegarLoop]: Abstraction has 163 states and 164 transitions. [2022-03-18 00:47:11,874 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 2.9056603773584904) internal successors, (154), 52 states have internal predecessors, (154), 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) [2022-03-18 00:47:11,874 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 164 transitions. [2022-03-18 00:47:11,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2022-03-18 00:47:11,875 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:47:11,875 INFO L500 BasicCegarLoop]: trace histogram [50, 50, 50, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:47:11,875 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2022-03-18 00:47:11,875 INFO L403 AbstractCegarLoop]: === Iteration 52 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:47:11,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:47:11,876 INFO L85 PathProgramCache]: Analyzing trace with hash -1278253885, now seen corresponding path program 50 times [2022-03-18 00:47:11,876 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:47:11,876 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1083175008] [2022-03-18 00:47:12,017 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-18 00:47:12,017 INFO L85 PathProgramCache]: Analyzing trace with hash 1687008400, now seen corresponding path program 1 times [2022-03-18 00:47:12,017 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:47:12,017 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [742734658] [2022-03-18 00:47:12,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:47:12,018 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:47:12,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:47:12,037 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:47:12,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:47:12,041 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:47:12,041 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:47:12,041 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [742734658] [2022-03-18 00:47:12,041 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [742734658] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:47:12,041 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:47:12,042 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-18 00:47:14,628 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:47:14,629 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1083175008] [2022-03-18 00:47:14,629 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1083175008] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:47:14,629 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:47:14,629 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [54] imperfect sequences [] total 54 [2022-03-18 00:47:14,629 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [986061480] [2022-03-18 00:47:14,629 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:47:14,629 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2022-03-18 00:47:14,629 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:47:14,629 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2022-03-18 00:47:14,630 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=2757, Unknown=0, NotChecked=0, Total=2862 [2022-03-18 00:47:14,630 INFO L87 Difference]: Start difference. First operand 163 states and 164 transitions. Second operand has 54 states, 54 states have (on average 2.9074074074074074) internal successors, (157), 53 states have internal predecessors, (157), 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) [2022-03-18 00:47:17,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:47:17,799 INFO L93 Difference]: Finished difference Result 175 states and 179 transitions. [2022-03-18 00:47:17,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2022-03-18 00:47:17,799 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 2.9074074074074074) internal successors, (157), 53 states have internal predecessors, (157), 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 161 [2022-03-18 00:47:17,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:47:17,800 INFO L225 Difference]: With dead ends: 175 [2022-03-18 00:47:17,800 INFO L226 Difference]: Without dead ends: 167 [2022-03-18 00:47:17,800 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 212 GetRequests, 8 SyntacticMatches, 101 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1275 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=309, Invalid=10611, Unknown=0, NotChecked=0, Total=10920 [2022-03-18 00:47:17,801 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 113 mSDsluCounter, 257 mSDsCounter, 0 mSdLazyCounter, 8161 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 113 SdHoareTripleChecker+Valid, 269 SdHoareTripleChecker+Invalid, 8215 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 8161 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2022-03-18 00:47:17,801 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [113 Valid, 269 Invalid, 8215 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 8161 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2022-03-18 00:47:17,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2022-03-18 00:47:17,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 166. [2022-03-18 00:47:17,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 166 states, 161 states have (on average 1.0124223602484472) internal successors, (163), 161 states have internal predecessors, (163), 3 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) [2022-03-18 00:47:17,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 167 transitions. [2022-03-18 00:47:17,821 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 167 transitions. Word has length 161 [2022-03-18 00:47:17,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:47:17,822 INFO L478 AbstractCegarLoop]: Abstraction has 166 states and 167 transitions. [2022-03-18 00:47:17,822 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 54 states have (on average 2.9074074074074074) internal successors, (157), 53 states have internal predecessors, (157), 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) [2022-03-18 00:47:17,822 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 167 transitions. [2022-03-18 00:47:17,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2022-03-18 00:47:17,822 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:47:17,822 INFO L500 BasicCegarLoop]: trace histogram [51, 51, 51, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:47:17,822 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2022-03-18 00:47:17,822 INFO L403 AbstractCegarLoop]: === Iteration 53 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:47:17,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:47:17,823 INFO L85 PathProgramCache]: Analyzing trace with hash 1303351947, now seen corresponding path program 51 times [2022-03-18 00:47:17,823 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:47:17,823 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1216665541] [2022-03-18 00:47:17,938 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-18 00:47:17,938 INFO L85 PathProgramCache]: Analyzing trace with hash 1746113744, now seen corresponding path program 1 times [2022-03-18 00:47:17,938 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:47:17,938 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1913559371] [2022-03-18 00:47:17,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:47:17,939 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:47:17,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:47:17,953 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:47:17,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:47:17,963 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:47:17,964 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:47:17,964 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1913559371] [2022-03-18 00:47:17,964 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1913559371] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:47:17,964 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:47:17,964 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-18 00:47:20,519 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:47:20,520 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1216665541] [2022-03-18 00:47:20,520 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1216665541] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:47:20,520 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:47:20,520 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [55] imperfect sequences [] total 55 [2022-03-18 00:47:20,520 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [928769338] [2022-03-18 00:47:20,520 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:47:20,520 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2022-03-18 00:47:20,520 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:47:20,520 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2022-03-18 00:47:20,521 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=2863, Unknown=0, NotChecked=0, Total=2970 [2022-03-18 00:47:20,521 INFO L87 Difference]: Start difference. First operand 166 states and 167 transitions. Second operand has 55 states, 55 states have (on average 2.909090909090909) internal successors, (160), 54 states have internal predecessors, (160), 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) [2022-03-18 00:47:23,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:47:23,899 INFO L93 Difference]: Finished difference Result 178 states and 182 transitions. [2022-03-18 00:47:23,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-03-18 00:47:23,900 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 55 states have (on average 2.909090909090909) internal successors, (160), 54 states have internal predecessors, (160), 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 164 [2022-03-18 00:47:23,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:47:23,901 INFO L225 Difference]: With dead ends: 178 [2022-03-18 00:47:23,901 INFO L226 Difference]: Without dead ends: 170 [2022-03-18 00:47:23,901 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 216 GetRequests, 8 SyntacticMatches, 103 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1326 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=315, Invalid=11027, Unknown=0, NotChecked=0, Total=11342 [2022-03-18 00:47:23,902 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 115 mSDsluCounter, 262 mSDsCounter, 0 mSdLazyCounter, 8477 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 115 SdHoareTripleChecker+Valid, 274 SdHoareTripleChecker+Invalid, 8532 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 8477 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-03-18 00:47:23,902 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [115 Valid, 274 Invalid, 8532 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 8477 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2022-03-18 00:47:23,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2022-03-18 00:47:23,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 169. [2022-03-18 00:47:23,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 169 states, 164 states have (on average 1.0121951219512195) internal successors, (166), 164 states have internal predecessors, (166), 3 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) [2022-03-18 00:47:23,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 170 transitions. [2022-03-18 00:47:23,931 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 170 transitions. Word has length 164 [2022-03-18 00:47:23,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:47:23,931 INFO L478 AbstractCegarLoop]: Abstraction has 169 states and 170 transitions. [2022-03-18 00:47:23,931 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 55 states have (on average 2.909090909090909) internal successors, (160), 54 states have internal predecessors, (160), 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) [2022-03-18 00:47:23,932 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 170 transitions. [2022-03-18 00:47:23,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2022-03-18 00:47:23,932 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:47:23,932 INFO L500 BasicCegarLoop]: trace histogram [52, 52, 52, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:47:23,932 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2022-03-18 00:47:23,932 INFO L403 AbstractCegarLoop]: === Iteration 54 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:47:23,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:47:23,933 INFO L85 PathProgramCache]: Analyzing trace with hash -56676413, now seen corresponding path program 52 times [2022-03-18 00:47:23,933 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:47:23,933 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [185164089] [2022-03-18 00:47:24,083 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-18 00:47:24,083 INFO L85 PathProgramCache]: Analyzing trace with hash 1805219088, now seen corresponding path program 1 times [2022-03-18 00:47:24,084 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:47:24,084 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [517271700] [2022-03-18 00:47:24,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:47:24,084 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:47:24,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:47:24,100 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:47:24,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:47:24,102 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:47:24,102 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:47:24,102 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [517271700] [2022-03-18 00:47:24,103 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [517271700] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:47:24,103 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:47:24,103 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-18 00:47:26,868 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:47:26,868 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [185164089] [2022-03-18 00:47:26,868 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [185164089] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:47:26,868 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:47:26,868 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [56] imperfect sequences [] total 56 [2022-03-18 00:47:26,868 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [265559195] [2022-03-18 00:47:26,868 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:47:26,869 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2022-03-18 00:47:26,869 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:47:26,869 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2022-03-18 00:47:26,869 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=2971, Unknown=0, NotChecked=0, Total=3080 [2022-03-18 00:47:26,869 INFO L87 Difference]: Start difference. First operand 169 states and 170 transitions. Second operand has 56 states, 56 states have (on average 2.9107142857142856) internal successors, (163), 55 states have internal predecessors, (163), 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) [2022-03-18 00:47:30,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:47:30,258 INFO L93 Difference]: Finished difference Result 181 states and 185 transitions. [2022-03-18 00:47:30,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2022-03-18 00:47:30,258 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 56 states have (on average 2.9107142857142856) internal successors, (163), 55 states have internal predecessors, (163), 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 167 [2022-03-18 00:47:30,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:47:30,259 INFO L225 Difference]: With dead ends: 181 [2022-03-18 00:47:30,259 INFO L226 Difference]: Without dead ends: 173 [2022-03-18 00:47:30,259 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 220 GetRequests, 8 SyntacticMatches, 105 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1378 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=321, Invalid=11451, Unknown=0, NotChecked=0, Total=11772 [2022-03-18 00:47:30,260 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 117 mSDsluCounter, 267 mSDsCounter, 0 mSdLazyCounter, 8799 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 117 SdHoareTripleChecker+Valid, 279 SdHoareTripleChecker+Invalid, 8855 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 8799 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-03-18 00:47:30,260 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [117 Valid, 279 Invalid, 8855 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 8799 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2022-03-18 00:47:30,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2022-03-18 00:47:30,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 172. [2022-03-18 00:47:30,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 172 states, 167 states have (on average 1.0119760479041917) internal successors, (169), 167 states have internal predecessors, (169), 3 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) [2022-03-18 00:47:30,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 173 transitions. [2022-03-18 00:47:30,281 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 173 transitions. Word has length 167 [2022-03-18 00:47:30,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:47:30,282 INFO L478 AbstractCegarLoop]: Abstraction has 172 states and 173 transitions. [2022-03-18 00:47:30,282 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 56 states have (on average 2.9107142857142856) internal successors, (163), 55 states have internal predecessors, (163), 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) [2022-03-18 00:47:30,282 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 173 transitions. [2022-03-18 00:47:30,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2022-03-18 00:47:30,282 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:47:30,282 INFO L500 BasicCegarLoop]: trace histogram [53, 53, 53, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:47:30,282 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2022-03-18 00:47:30,282 INFO L403 AbstractCegarLoop]: === Iteration 55 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:47:30,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:47:30,283 INFO L85 PathProgramCache]: Analyzing trace with hash 2059921291, now seen corresponding path program 53 times [2022-03-18 00:47:30,283 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:47:30,283 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1688008858] [2022-03-18 00:47:30,402 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-18 00:47:30,403 INFO L85 PathProgramCache]: Analyzing trace with hash 1864324432, now seen corresponding path program 1 times [2022-03-18 00:47:30,403 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:47:30,403 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [537391344] [2022-03-18 00:47:30,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:47:30,403 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:47:30,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:47:30,418 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:47:30,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:47:30,426 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:47:30,426 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:47:30,426 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [537391344] [2022-03-18 00:47:30,426 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [537391344] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:47:30,426 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:47:30,426 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-18 00:47:33,227 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:47:33,227 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1688008858] [2022-03-18 00:47:33,227 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1688008858] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:47:33,227 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:47:33,227 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [57] imperfect sequences [] total 57 [2022-03-18 00:47:33,227 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [237329649] [2022-03-18 00:47:33,227 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:47:33,227 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2022-03-18 00:47:33,227 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:47:33,228 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2022-03-18 00:47:33,228 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=3081, Unknown=0, NotChecked=0, Total=3192 [2022-03-18 00:47:33,228 INFO L87 Difference]: Start difference. First operand 172 states and 173 transitions. Second operand has 57 states, 57 states have (on average 2.912280701754386) internal successors, (166), 56 states have internal predecessors, (166), 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) [2022-03-18 00:47:36,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:47:36,780 INFO L93 Difference]: Finished difference Result 184 states and 188 transitions. [2022-03-18 00:47:36,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2022-03-18 00:47:36,780 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 57 states have (on average 2.912280701754386) internal successors, (166), 56 states have internal predecessors, (166), 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 170 [2022-03-18 00:47:36,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:47:36,781 INFO L225 Difference]: With dead ends: 184 [2022-03-18 00:47:36,781 INFO L226 Difference]: Without dead ends: 176 [2022-03-18 00:47:36,781 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 224 GetRequests, 8 SyntacticMatches, 107 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1431 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=327, Invalid=11883, Unknown=0, NotChecked=0, Total=12210 [2022-03-18 00:47:36,782 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 119 mSDsluCounter, 272 mSDsCounter, 0 mSdLazyCounter, 9127 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 119 SdHoareTripleChecker+Valid, 284 SdHoareTripleChecker+Invalid, 9184 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 9127 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2022-03-18 00:47:36,782 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [119 Valid, 284 Invalid, 9184 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 9127 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2022-03-18 00:47:36,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2022-03-18 00:47:36,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 175. [2022-03-18 00:47:36,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175 states, 170 states have (on average 1.011764705882353) internal successors, (172), 170 states have internal predecessors, (172), 3 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) [2022-03-18 00:47:36,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 176 transitions. [2022-03-18 00:47:36,805 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 176 transitions. Word has length 170 [2022-03-18 00:47:36,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:47:36,805 INFO L478 AbstractCegarLoop]: Abstraction has 175 states and 176 transitions. [2022-03-18 00:47:36,805 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 57 states have (on average 2.912280701754386) internal successors, (166), 56 states have internal predecessors, (166), 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) [2022-03-18 00:47:36,805 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 176 transitions. [2022-03-18 00:47:36,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2022-03-18 00:47:36,806 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:47:36,806 INFO L500 BasicCegarLoop]: trace histogram [54, 54, 54, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:47:36,806 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2022-03-18 00:47:36,806 INFO L403 AbstractCegarLoop]: === Iteration 56 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:47:36,806 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:47:36,806 INFO L85 PathProgramCache]: Analyzing trace with hash -1087718717, now seen corresponding path program 54 times [2022-03-18 00:47:36,806 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:47:36,806 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1922462551] [2022-03-18 00:47:36,900 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-18 00:47:36,901 INFO L85 PathProgramCache]: Analyzing trace with hash 1923429776, now seen corresponding path program 1 times [2022-03-18 00:47:36,901 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:47:36,901 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2022742398] [2022-03-18 00:47:36,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:47:36,901 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:47:36,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:47:36,914 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:47:36,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:47:36,917 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:47:36,917 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:47:36,917 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2022742398] [2022-03-18 00:47:36,917 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2022742398] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:47:36,917 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:47:36,917 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-18 00:47:39,825 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:47:39,825 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1922462551] [2022-03-18 00:47:39,825 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1922462551] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:47:39,825 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:47:39,825 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [58] imperfect sequences [] total 58 [2022-03-18 00:47:39,825 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1162778578] [2022-03-18 00:47:39,825 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:47:39,825 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2022-03-18 00:47:39,825 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:47:39,826 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2022-03-18 00:47:39,826 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=3193, Unknown=0, NotChecked=0, Total=3306 [2022-03-18 00:47:39,826 INFO L87 Difference]: Start difference. First operand 175 states and 176 transitions. Second operand has 58 states, 58 states have (on average 2.913793103448276) internal successors, (169), 57 states have internal predecessors, (169), 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) [2022-03-18 00:47:43,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:47:43,576 INFO L93 Difference]: Finished difference Result 187 states and 191 transitions. [2022-03-18 00:47:43,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2022-03-18 00:47:43,577 INFO L78 Accepts]: Start accepts. Automaton has has 58 states, 58 states have (on average 2.913793103448276) internal successors, (169), 57 states have internal predecessors, (169), 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 173 [2022-03-18 00:47:43,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:47:43,577 INFO L225 Difference]: With dead ends: 187 [2022-03-18 00:47:43,577 INFO L226 Difference]: Without dead ends: 179 [2022-03-18 00:47:43,578 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 228 GetRequests, 8 SyntacticMatches, 109 SemanticMatches, 111 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1485 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=333, Invalid=12323, Unknown=0, NotChecked=0, Total=12656 [2022-03-18 00:47:43,578 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 121 mSDsluCounter, 277 mSDsCounter, 0 mSdLazyCounter, 9461 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 121 SdHoareTripleChecker+Valid, 289 SdHoareTripleChecker+Invalid, 9519 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 9461 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2022-03-18 00:47:43,578 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [121 Valid, 289 Invalid, 9519 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 9461 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2022-03-18 00:47:43,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2022-03-18 00:47:43,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 178. [2022-03-18 00:47:43,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 178 states, 173 states have (on average 1.0115606936416186) internal successors, (175), 173 states have internal predecessors, (175), 3 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) [2022-03-18 00:47:43,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 179 transitions. [2022-03-18 00:47:43,602 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 179 transitions. Word has length 173 [2022-03-18 00:47:43,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:47:43,602 INFO L478 AbstractCegarLoop]: Abstraction has 178 states and 179 transitions. [2022-03-18 00:47:43,602 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 58 states, 58 states have (on average 2.913793103448276) internal successors, (169), 57 states have internal predecessors, (169), 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) [2022-03-18 00:47:43,602 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 179 transitions. [2022-03-18 00:47:43,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2022-03-18 00:47:43,603 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:47:43,603 INFO L500 BasicCegarLoop]: trace histogram [55, 55, 55, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:47:43,603 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2022-03-18 00:47:43,603 INFO L403 AbstractCegarLoop]: === Iteration 57 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:47:43,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:47:43,603 INFO L85 PathProgramCache]: Analyzing trace with hash -410223477, now seen corresponding path program 55 times [2022-03-18 00:47:43,603 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:47:43,603 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1734395081] [2022-03-18 00:47:43,723 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-18 00:47:43,723 INFO L85 PathProgramCache]: Analyzing trace with hash 1982535120, now seen corresponding path program 1 times [2022-03-18 00:47:43,723 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:47:43,723 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [293954852] [2022-03-18 00:47:43,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:47:43,724 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:47:43,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:47:43,742 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:47:43,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:47:43,754 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:47:43,754 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:47:43,754 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [293954852] [2022-03-18 00:47:43,754 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [293954852] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:47:43,754 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:47:43,755 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-18 00:47:46,672 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:47:46,672 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1734395081] [2022-03-18 00:47:46,673 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1734395081] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:47:46,673 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:47:46,673 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [59] imperfect sequences [] total 59 [2022-03-18 00:47:46,673 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [808894572] [2022-03-18 00:47:46,673 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:47:46,673 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2022-03-18 00:47:46,673 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:47:46,673 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2022-03-18 00:47:46,674 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=3307, Unknown=0, NotChecked=0, Total=3422 [2022-03-18 00:47:46,674 INFO L87 Difference]: Start difference. First operand 178 states and 179 transitions. Second operand has 59 states, 59 states have (on average 2.9152542372881354) internal successors, (172), 58 states have internal predecessors, (172), 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) [2022-03-18 00:47:50,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:47:50,518 INFO L93 Difference]: Finished difference Result 190 states and 194 transitions. [2022-03-18 00:47:50,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2022-03-18 00:47:50,519 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 59 states have (on average 2.9152542372881354) internal successors, (172), 58 states have internal predecessors, (172), 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 176 [2022-03-18 00:47:50,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:47:50,520 INFO L225 Difference]: With dead ends: 190 [2022-03-18 00:47:50,520 INFO L226 Difference]: Without dead ends: 182 [2022-03-18 00:47:50,521 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 232 GetRequests, 8 SyntacticMatches, 111 SemanticMatches, 113 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1540 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=339, Invalid=12771, Unknown=0, NotChecked=0, Total=13110 [2022-03-18 00:47:50,521 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 123 mSDsluCounter, 282 mSDsCounter, 0 mSdLazyCounter, 9801 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 123 SdHoareTripleChecker+Valid, 294 SdHoareTripleChecker+Invalid, 9860 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 9801 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2022-03-18 00:47:50,521 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [123 Valid, 294 Invalid, 9860 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 9801 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2022-03-18 00:47:50,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2022-03-18 00:47:50,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 181. [2022-03-18 00:47:50,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 181 states, 176 states have (on average 1.0113636363636365) internal successors, (178), 176 states have internal predecessors, (178), 3 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) [2022-03-18 00:47:50,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 182 transitions. [2022-03-18 00:47:50,566 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 182 transitions. Word has length 176 [2022-03-18 00:47:50,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:47:50,566 INFO L478 AbstractCegarLoop]: Abstraction has 181 states and 182 transitions. [2022-03-18 00:47:50,566 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 59 states have (on average 2.9152542372881354) internal successors, (172), 58 states have internal predecessors, (172), 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) [2022-03-18 00:47:50,566 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 182 transitions. [2022-03-18 00:47:50,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2022-03-18 00:47:50,567 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:47:50,567 INFO L500 BasicCegarLoop]: trace histogram [56, 56, 56, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:47:50,567 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2022-03-18 00:47:50,567 INFO L403 AbstractCegarLoop]: === Iteration 58 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:47:50,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:47:50,567 INFO L85 PathProgramCache]: Analyzing trace with hash 799147459, now seen corresponding path program 56 times [2022-03-18 00:47:50,568 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:47:50,568 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [725901159] [2022-03-18 00:47:50,700 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-18 00:47:50,700 INFO L85 PathProgramCache]: Analyzing trace with hash 2041640464, now seen corresponding path program 1 times [2022-03-18 00:47:50,700 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:47:50,701 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1934684583] [2022-03-18 00:47:50,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:47:50,701 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:47:50,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:47:50,719 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:47:50,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:47:50,721 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:47:50,721 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:47:50,721 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1934684583] [2022-03-18 00:47:50,722 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1934684583] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:47:50,722 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:47:50,722 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-18 00:47:54,040 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:47:54,041 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [725901159] [2022-03-18 00:47:54,041 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [725901159] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:47:54,041 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:47:54,041 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [60] imperfect sequences [] total 60 [2022-03-18 00:47:54,041 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [24323123] [2022-03-18 00:47:54,041 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:47:54,041 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 60 states [2022-03-18 00:47:54,041 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:47:54,042 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2022-03-18 00:47:54,042 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=3423, Unknown=0, NotChecked=0, Total=3540 [2022-03-18 00:47:54,042 INFO L87 Difference]: Start difference. First operand 181 states and 182 transitions. Second operand has 60 states, 60 states have (on average 2.9166666666666665) internal successors, (175), 59 states have internal predecessors, (175), 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) [2022-03-18 00:47:58,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:47:58,260 INFO L93 Difference]: Finished difference Result 193 states and 197 transitions. [2022-03-18 00:47:58,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2022-03-18 00:47:58,260 INFO L78 Accepts]: Start accepts. Automaton has has 60 states, 60 states have (on average 2.9166666666666665) internal successors, (175), 59 states have internal predecessors, (175), 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 179 [2022-03-18 00:47:58,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:47:58,261 INFO L225 Difference]: With dead ends: 193 [2022-03-18 00:47:58,261 INFO L226 Difference]: Without dead ends: 185 [2022-03-18 00:47:58,262 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 236 GetRequests, 8 SyntacticMatches, 113 SemanticMatches, 115 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1596 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=345, Invalid=13227, Unknown=0, NotChecked=0, Total=13572 [2022-03-18 00:47:58,262 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 125 mSDsluCounter, 287 mSDsCounter, 0 mSdLazyCounter, 10147 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 125 SdHoareTripleChecker+Valid, 299 SdHoareTripleChecker+Invalid, 10207 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 10147 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2022-03-18 00:47:58,262 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [125 Valid, 299 Invalid, 10207 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 10147 Invalid, 0 Unknown, 0 Unchecked, 2.9s Time] [2022-03-18 00:47:58,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2022-03-18 00:47:58,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 184. [2022-03-18 00:47:58,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 184 states, 179 states have (on average 1.011173184357542) internal successors, (181), 179 states have internal predecessors, (181), 3 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) [2022-03-18 00:47:58,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 185 transitions. [2022-03-18 00:47:58,291 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 185 transitions. Word has length 179 [2022-03-18 00:47:58,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:47:58,292 INFO L478 AbstractCegarLoop]: Abstraction has 184 states and 185 transitions. [2022-03-18 00:47:58,292 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 60 states, 60 states have (on average 2.9166666666666665) internal successors, (175), 59 states have internal predecessors, (175), 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) [2022-03-18 00:47:58,292 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 185 transitions. [2022-03-18 00:47:58,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2022-03-18 00:47:58,292 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:47:58,292 INFO L500 BasicCegarLoop]: trace histogram [57, 57, 57, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:47:58,292 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2022-03-18 00:47:58,293 INFO L403 AbstractCegarLoop]: === Iteration 59 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:47:58,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:47:58,293 INFO L85 PathProgramCache]: Analyzing trace with hash -1311944309, now seen corresponding path program 57 times [2022-03-18 00:47:58,293 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:47:58,293 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [858662769] [2022-03-18 00:47:58,433 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-18 00:47:58,433 INFO L85 PathProgramCache]: Analyzing trace with hash 2100745808, now seen corresponding path program 1 times [2022-03-18 00:47:58,433 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:47:58,433 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1424422834] [2022-03-18 00:47:58,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:47:58,433 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:47:58,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:47:58,448 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:47:58,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:47:58,451 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:47:58,451 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:47:58,451 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1424422834] [2022-03-18 00:47:58,451 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1424422834] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:47:58,451 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:47:58,451 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-18 00:48:01,705 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:48:01,706 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [858662769] [2022-03-18 00:48:01,706 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [858662769] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:48:01,706 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:48:01,706 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [61] imperfect sequences [] total 61 [2022-03-18 00:48:01,706 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1734460916] [2022-03-18 00:48:01,706 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:48:01,706 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 61 states [2022-03-18 00:48:01,707 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:48:01,707 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2022-03-18 00:48:01,707 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=3541, Unknown=0, NotChecked=0, Total=3660 [2022-03-18 00:48:01,707 INFO L87 Difference]: Start difference. First operand 184 states and 185 transitions. Second operand has 61 states, 61 states have (on average 2.918032786885246) internal successors, (178), 60 states have internal predecessors, (178), 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) [2022-03-18 00:48:06,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:48:06,105 INFO L93 Difference]: Finished difference Result 196 states and 200 transitions. [2022-03-18 00:48:06,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2022-03-18 00:48:06,105 INFO L78 Accepts]: Start accepts. Automaton has has 61 states, 61 states have (on average 2.918032786885246) internal successors, (178), 60 states have internal predecessors, (178), 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 182 [2022-03-18 00:48:06,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:48:06,106 INFO L225 Difference]: With dead ends: 196 [2022-03-18 00:48:06,106 INFO L226 Difference]: Without dead ends: 188 [2022-03-18 00:48:06,107 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 240 GetRequests, 8 SyntacticMatches, 115 SemanticMatches, 117 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1653 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=351, Invalid=13691, Unknown=0, NotChecked=0, Total=14042 [2022-03-18 00:48:06,107 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 127 mSDsluCounter, 292 mSDsCounter, 0 mSdLazyCounter, 10499 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 127 SdHoareTripleChecker+Valid, 304 SdHoareTripleChecker+Invalid, 10560 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 10499 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2022-03-18 00:48:06,107 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [127 Valid, 304 Invalid, 10560 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 10499 Invalid, 0 Unknown, 0 Unchecked, 3.0s Time] [2022-03-18 00:48:06,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2022-03-18 00:48:06,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 187. [2022-03-18 00:48:06,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 187 states, 182 states have (on average 1.010989010989011) internal successors, (184), 182 states have internal predecessors, (184), 3 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) [2022-03-18 00:48:06,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 188 transitions. [2022-03-18 00:48:06,133 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 188 transitions. Word has length 182 [2022-03-18 00:48:06,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:48:06,134 INFO L478 AbstractCegarLoop]: Abstraction has 187 states and 188 transitions. [2022-03-18 00:48:06,134 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 61 states, 61 states have (on average 2.918032786885246) internal successors, (178), 60 states have internal predecessors, (178), 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) [2022-03-18 00:48:06,134 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 188 transitions. [2022-03-18 00:48:06,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2022-03-18 00:48:06,134 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:48:06,134 INFO L500 BasicCegarLoop]: trace histogram [58, 58, 58, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:48:06,135 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2022-03-18 00:48:06,135 INFO L403 AbstractCegarLoop]: === Iteration 60 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:48:06,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:48:06,135 INFO L85 PathProgramCache]: Analyzing trace with hash -1640689469, now seen corresponding path program 58 times [2022-03-18 00:48:06,135 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:48:06,135 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1606827706] [2022-03-18 00:48:06,254 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-18 00:48:06,255 INFO L85 PathProgramCache]: Analyzing trace with hash -2135116144, now seen corresponding path program 1 times [2022-03-18 00:48:06,255 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:48:06,255 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1282025630] [2022-03-18 00:48:06,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:48:06,255 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:48:06,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:48:06,274 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:48:06,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:48:06,277 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:48:06,277 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:48:06,277 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1282025630] [2022-03-18 00:48:06,277 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1282025630] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:48:06,277 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:48:06,277 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-18 00:48:09,564 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:48:09,564 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1606827706] [2022-03-18 00:48:09,564 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1606827706] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:48:09,564 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:48:09,564 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [62] imperfect sequences [] total 62 [2022-03-18 00:48:09,564 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [633923254] [2022-03-18 00:48:09,564 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:48:09,565 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 62 states [2022-03-18 00:48:09,565 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:48:09,565 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2022-03-18 00:48:09,565 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=3661, Unknown=0, NotChecked=0, Total=3782 [2022-03-18 00:48:09,565 INFO L87 Difference]: Start difference. First operand 187 states and 188 transitions. Second operand has 62 states, 62 states have (on average 2.9193548387096775) internal successors, (181), 61 states have internal predecessors, (181), 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) [2022-03-18 00:48:13,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:48:13,843 INFO L93 Difference]: Finished difference Result 199 states and 203 transitions. [2022-03-18 00:48:13,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2022-03-18 00:48:13,843 INFO L78 Accepts]: Start accepts. Automaton has has 62 states, 62 states have (on average 2.9193548387096775) internal successors, (181), 61 states have internal predecessors, (181), 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 185 [2022-03-18 00:48:13,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:48:13,844 INFO L225 Difference]: With dead ends: 199 [2022-03-18 00:48:13,844 INFO L226 Difference]: Without dead ends: 191 [2022-03-18 00:48:13,845 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 244 GetRequests, 8 SyntacticMatches, 117 SemanticMatches, 119 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1711 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=357, Invalid=14163, Unknown=0, NotChecked=0, Total=14520 [2022-03-18 00:48:13,845 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 129 mSDsluCounter, 297 mSDsCounter, 0 mSdLazyCounter, 10857 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 129 SdHoareTripleChecker+Valid, 309 SdHoareTripleChecker+Invalid, 10919 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 10857 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2022-03-18 00:48:13,845 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [129 Valid, 309 Invalid, 10919 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 10857 Invalid, 0 Unknown, 0 Unchecked, 2.9s Time] [2022-03-18 00:48:13,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2022-03-18 00:48:13,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 190. [2022-03-18 00:48:13,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 190 states, 185 states have (on average 1.0108108108108107) internal successors, (187), 185 states have internal predecessors, (187), 3 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) [2022-03-18 00:48:13,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 191 transitions. [2022-03-18 00:48:13,880 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 191 transitions. Word has length 185 [2022-03-18 00:48:13,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:48:13,880 INFO L478 AbstractCegarLoop]: Abstraction has 190 states and 191 transitions. [2022-03-18 00:48:13,881 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 62 states, 62 states have (on average 2.9193548387096775) internal successors, (181), 61 states have internal predecessors, (181), 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) [2022-03-18 00:48:13,881 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 191 transitions. [2022-03-18 00:48:13,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 189 [2022-03-18 00:48:13,881 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:48:13,882 INFO L500 BasicCegarLoop]: trace histogram [59, 59, 59, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:48:13,882 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2022-03-18 00:48:13,882 INFO L403 AbstractCegarLoop]: === Iteration 61 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:48:13,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:48:13,882 INFO L85 PathProgramCache]: Analyzing trace with hash 1532651147, now seen corresponding path program 59 times [2022-03-18 00:48:13,882 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:48:13,882 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1376078997] [2022-03-18 00:48:13,970 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-18 00:48:13,970 INFO L85 PathProgramCache]: Analyzing trace with hash -2076010800, now seen corresponding path program 1 times [2022-03-18 00:48:13,970 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:48:13,970 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1144660898] [2022-03-18 00:48:13,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:48:13,970 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:48:13,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:48:13,989 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:48:13,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:48:13,991 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:48:13,992 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:48:13,992 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1144660898] [2022-03-18 00:48:13,992 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1144660898] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:48:13,992 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:48:13,992 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-18 00:48:17,308 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:48:17,308 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1376078997] [2022-03-18 00:48:17,308 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1376078997] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:48:17,308 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:48:17,309 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [63] imperfect sequences [] total 63 [2022-03-18 00:48:17,309 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1156510871] [2022-03-18 00:48:17,309 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:48:17,309 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2022-03-18 00:48:17,309 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:48:17,309 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2022-03-18 00:48:17,309 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=3783, Unknown=0, NotChecked=0, Total=3906 [2022-03-18 00:48:17,310 INFO L87 Difference]: Start difference. First operand 190 states and 191 transitions. Second operand has 63 states, 63 states have (on average 2.9206349206349205) internal successors, (184), 62 states have internal predecessors, (184), 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) [2022-03-18 00:48:21,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:48:21,703 INFO L93 Difference]: Finished difference Result 202 states and 206 transitions. [2022-03-18 00:48:21,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2022-03-18 00:48:21,703 INFO L78 Accepts]: Start accepts. Automaton has has 63 states, 63 states have (on average 2.9206349206349205) internal successors, (184), 62 states have internal predecessors, (184), 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 188 [2022-03-18 00:48:21,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:48:21,704 INFO L225 Difference]: With dead ends: 202 [2022-03-18 00:48:21,704 INFO L226 Difference]: Without dead ends: 194 [2022-03-18 00:48:21,705 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 248 GetRequests, 8 SyntacticMatches, 119 SemanticMatches, 121 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1770 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=363, Invalid=14643, Unknown=0, NotChecked=0, Total=15006 [2022-03-18 00:48:21,705 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 131 mSDsluCounter, 302 mSDsCounter, 0 mSdLazyCounter, 11221 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 131 SdHoareTripleChecker+Valid, 314 SdHoareTripleChecker+Invalid, 11284 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 11221 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2022-03-18 00:48:21,706 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [131 Valid, 314 Invalid, 11284 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 11221 Invalid, 0 Unknown, 0 Unchecked, 3.0s Time] [2022-03-18 00:48:21,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2022-03-18 00:48:21,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 193. [2022-03-18 00:48:21,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 193 states, 188 states have (on average 1.0106382978723405) internal successors, (190), 188 states have internal predecessors, (190), 3 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) [2022-03-18 00:48:21,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 194 transitions. [2022-03-18 00:48:21,737 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 194 transitions. Word has length 188 [2022-03-18 00:48:21,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:48:21,737 INFO L478 AbstractCegarLoop]: Abstraction has 193 states and 194 transitions. [2022-03-18 00:48:21,737 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 63 states, 63 states have (on average 2.9206349206349205) internal successors, (184), 62 states have internal predecessors, (184), 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) [2022-03-18 00:48:21,737 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 194 transitions. [2022-03-18 00:48:21,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 192 [2022-03-18 00:48:21,738 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:48:21,738 INFO L500 BasicCegarLoop]: trace histogram [60, 60, 60, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:48:21,738 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2022-03-18 00:48:21,738 INFO L403 AbstractCegarLoop]: === Iteration 62 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:48:21,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:48:21,738 INFO L85 PathProgramCache]: Analyzing trace with hash 1997790147, now seen corresponding path program 60 times [2022-03-18 00:48:21,738 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:48:21,738 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1419317014] [2022-03-18 00:48:21,851 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-18 00:48:21,851 INFO L85 PathProgramCache]: Analyzing trace with hash -2016905456, now seen corresponding path program 1 times [2022-03-18 00:48:21,851 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:48:21,851 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1374428665] [2022-03-18 00:48:21,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:48:21,852 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:48:21,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:48:21,870 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:48:21,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:48:21,872 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:48:21,872 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:48:21,872 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1374428665] [2022-03-18 00:48:21,872 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1374428665] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:48:21,873 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:48:21,873 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-18 00:48:25,395 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:48:25,395 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1419317014] [2022-03-18 00:48:25,396 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1419317014] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:48:25,396 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:48:25,396 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [64] imperfect sequences [] total 64 [2022-03-18 00:48:25,396 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [235161894] [2022-03-18 00:48:25,396 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:48:25,396 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 64 states [2022-03-18 00:48:25,396 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:48:25,396 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2022-03-18 00:48:25,396 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=3907, Unknown=0, NotChecked=0, Total=4032 [2022-03-18 00:48:25,396 INFO L87 Difference]: Start difference. First operand 193 states and 194 transitions. Second operand has 64 states, 64 states have (on average 2.921875) internal successors, (187), 63 states have internal predecessors, (187), 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) [2022-03-18 00:48:29,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:48:29,708 INFO L93 Difference]: Finished difference Result 205 states and 209 transitions. [2022-03-18 00:48:29,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2022-03-18 00:48:29,708 INFO L78 Accepts]: Start accepts. Automaton has has 64 states, 64 states have (on average 2.921875) internal successors, (187), 63 states have internal predecessors, (187), 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 191 [2022-03-18 00:48:29,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:48:29,709 INFO L225 Difference]: With dead ends: 205 [2022-03-18 00:48:29,709 INFO L226 Difference]: Without dead ends: 197 [2022-03-18 00:48:29,710 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 252 GetRequests, 8 SyntacticMatches, 121 SemanticMatches, 123 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1830 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=369, Invalid=15131, Unknown=0, NotChecked=0, Total=15500 [2022-03-18 00:48:29,710 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 133 mSDsluCounter, 307 mSDsCounter, 0 mSdLazyCounter, 11591 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 133 SdHoareTripleChecker+Valid, 319 SdHoareTripleChecker+Invalid, 11655 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 11591 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2022-03-18 00:48:29,710 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [133 Valid, 319 Invalid, 11655 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 11591 Invalid, 0 Unknown, 0 Unchecked, 2.9s Time] [2022-03-18 00:48:29,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2022-03-18 00:48:29,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 196. [2022-03-18 00:48:29,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 196 states, 191 states have (on average 1.0104712041884816) internal successors, (193), 191 states have internal predecessors, (193), 3 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) [2022-03-18 00:48:29,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 197 transitions. [2022-03-18 00:48:29,738 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 197 transitions. Word has length 191 [2022-03-18 00:48:29,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:48:29,738 INFO L478 AbstractCegarLoop]: Abstraction has 196 states and 197 transitions. [2022-03-18 00:48:29,738 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 64 states, 64 states have (on average 2.921875) internal successors, (187), 63 states have internal predecessors, (187), 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) [2022-03-18 00:48:29,738 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 197 transitions. [2022-03-18 00:48:29,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 195 [2022-03-18 00:48:29,739 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:48:29,739 INFO L500 BasicCegarLoop]: trace histogram [61, 61, 61, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:48:29,739 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2022-03-18 00:48:29,739 INFO L403 AbstractCegarLoop]: === Iteration 63 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:48:29,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:48:29,739 INFO L85 PathProgramCache]: Analyzing trace with hash -905725045, now seen corresponding path program 61 times [2022-03-18 00:48:29,739 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:48:29,739 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1682467833] [2022-03-18 00:48:29,853 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-18 00:48:29,853 INFO L85 PathProgramCache]: Analyzing trace with hash -1957800112, now seen corresponding path program 1 times [2022-03-18 00:48:29,853 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:48:29,853 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [482794406] [2022-03-18 00:48:29,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:48:29,854 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:48:29,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:48:29,866 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:48:29,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:48:29,868 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:48:29,868 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:48:29,868 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [482794406] [2022-03-18 00:48:29,868 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [482794406] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:48:29,869 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:48:29,869 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-18 00:48:33,398 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:48:33,399 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1682467833] [2022-03-18 00:48:33,399 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1682467833] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:48:33,399 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:48:33,399 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [65] imperfect sequences [] total 65 [2022-03-18 00:48:33,399 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [904866430] [2022-03-18 00:48:33,399 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:48:33,399 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 65 states [2022-03-18 00:48:33,399 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:48:33,400 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2022-03-18 00:48:33,400 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=4033, Unknown=0, NotChecked=0, Total=4160 [2022-03-18 00:48:33,400 INFO L87 Difference]: Start difference. First operand 196 states and 197 transitions. Second operand has 65 states, 65 states have (on average 2.923076923076923) internal successors, (190), 64 states have internal predecessors, (190), 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) [2022-03-18 00:48:38,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:48:38,013 INFO L93 Difference]: Finished difference Result 208 states and 212 transitions. [2022-03-18 00:48:38,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2022-03-18 00:48:38,014 INFO L78 Accepts]: Start accepts. Automaton has has 65 states, 65 states have (on average 2.923076923076923) internal successors, (190), 64 states have internal predecessors, (190), 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 194 [2022-03-18 00:48:38,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:48:38,014 INFO L225 Difference]: With dead ends: 208 [2022-03-18 00:48:38,015 INFO L226 Difference]: Without dead ends: 200 [2022-03-18 00:48:38,015 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 256 GetRequests, 8 SyntacticMatches, 123 SemanticMatches, 125 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1891 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=375, Invalid=15627, Unknown=0, NotChecked=0, Total=16002 [2022-03-18 00:48:38,015 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 135 mSDsluCounter, 312 mSDsCounter, 0 mSdLazyCounter, 11967 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 135 SdHoareTripleChecker+Valid, 324 SdHoareTripleChecker+Invalid, 12032 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 11967 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2022-03-18 00:48:38,015 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [135 Valid, 324 Invalid, 12032 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 11967 Invalid, 0 Unknown, 0 Unchecked, 3.1s Time] [2022-03-18 00:48:38,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2022-03-18 00:48:38,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 199. [2022-03-18 00:48:38,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 199 states, 194 states have (on average 1.0103092783505154) internal successors, (196), 194 states have internal predecessors, (196), 3 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) [2022-03-18 00:48:38,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 200 transitions. [2022-03-18 00:48:38,044 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 200 transitions. Word has length 194 [2022-03-18 00:48:38,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:48:38,044 INFO L478 AbstractCegarLoop]: Abstraction has 199 states and 200 transitions. [2022-03-18 00:48:38,044 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 65 states, 65 states have (on average 2.923076923076923) internal successors, (190), 64 states have internal predecessors, (190), 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) [2022-03-18 00:48:38,044 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 200 transitions. [2022-03-18 00:48:38,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 198 [2022-03-18 00:48:38,045 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:48:38,045 INFO L500 BasicCegarLoop]: trace histogram [62, 62, 62, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:48:38,045 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2022-03-18 00:48:38,045 INFO L403 AbstractCegarLoop]: === Iteration 64 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:48:38,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:48:38,046 INFO L85 PathProgramCache]: Analyzing trace with hash 1114531523, now seen corresponding path program 62 times [2022-03-18 00:48:38,046 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:48:38,046 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2009572891] [2022-03-18 00:48:38,163 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-18 00:48:38,163 INFO L85 PathProgramCache]: Analyzing trace with hash -1898694768, now seen corresponding path program 1 times [2022-03-18 00:48:38,164 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:48:38,164 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1640893380] [2022-03-18 00:48:38,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:48:38,164 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:48:38,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:48:38,195 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:48:38,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:48:38,198 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:48:38,198 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:48:38,198 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1640893380] [2022-03-18 00:48:38,198 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1640893380] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:48:38,198 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:48:38,198 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-18 00:48:41,956 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:48:41,956 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2009572891] [2022-03-18 00:48:41,956 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2009572891] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:48:41,956 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:48:41,957 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [66] imperfect sequences [] total 66 [2022-03-18 00:48:41,957 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2070987006] [2022-03-18 00:48:41,957 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:48:41,957 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2022-03-18 00:48:41,957 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:48:41,957 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2022-03-18 00:48:41,957 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=4161, Unknown=0, NotChecked=0, Total=4290 [2022-03-18 00:48:41,958 INFO L87 Difference]: Start difference. First operand 199 states and 200 transitions. Second operand has 66 states, 66 states have (on average 2.9242424242424243) internal successors, (193), 65 states have internal predecessors, (193), 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) [2022-03-18 00:48:46,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:48:46,628 INFO L93 Difference]: Finished difference Result 211 states and 215 transitions. [2022-03-18 00:48:46,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2022-03-18 00:48:46,628 INFO L78 Accepts]: Start accepts. Automaton has has 66 states, 66 states have (on average 2.9242424242424243) internal successors, (193), 65 states have internal predecessors, (193), 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 197 [2022-03-18 00:48:46,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:48:46,629 INFO L225 Difference]: With dead ends: 211 [2022-03-18 00:48:46,629 INFO L226 Difference]: Without dead ends: 203 [2022-03-18 00:48:46,629 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 260 GetRequests, 8 SyntacticMatches, 125 SemanticMatches, 127 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1953 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=381, Invalid=16131, Unknown=0, NotChecked=0, Total=16512 [2022-03-18 00:48:46,630 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 137 mSDsluCounter, 317 mSDsCounter, 0 mSdLazyCounter, 12349 mSolverCounterSat, 66 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 137 SdHoareTripleChecker+Valid, 329 SdHoareTripleChecker+Invalid, 12415 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 12349 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2022-03-18 00:48:46,630 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [137 Valid, 329 Invalid, 12415 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [66 Valid, 12349 Invalid, 0 Unknown, 0 Unchecked, 3.2s Time] [2022-03-18 00:48:46,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2022-03-18 00:48:46,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 202. [2022-03-18 00:48:46,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 202 states, 197 states have (on average 1.0101522842639594) internal successors, (199), 197 states have internal predecessors, (199), 3 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) [2022-03-18 00:48:46,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 203 transitions. [2022-03-18 00:48:46,662 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 203 transitions. Word has length 197 [2022-03-18 00:48:46,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:48:46,662 INFO L478 AbstractCegarLoop]: Abstraction has 202 states and 203 transitions. [2022-03-18 00:48:46,662 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 66 states have (on average 2.9242424242424243) internal successors, (193), 65 states have internal predecessors, (193), 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) [2022-03-18 00:48:46,662 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 203 transitions. [2022-03-18 00:48:46,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 201 [2022-03-18 00:48:46,667 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:48:46,668 INFO L500 BasicCegarLoop]: trace histogram [63, 63, 63, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:48:46,668 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2022-03-18 00:48:46,668 INFO L403 AbstractCegarLoop]: === Iteration 65 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:48:46,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:48:46,668 INFO L85 PathProgramCache]: Analyzing trace with hash 1201229963, now seen corresponding path program 63 times [2022-03-18 00:48:46,668 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:48:46,668 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1711990322] [2022-03-18 00:48:46,793 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-18 00:48:46,794 INFO L85 PathProgramCache]: Analyzing trace with hash -1839589424, now seen corresponding path program 1 times [2022-03-18 00:48:46,794 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:48:46,794 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [314422729] [2022-03-18 00:48:46,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:48:46,794 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:48:46,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:48:46,812 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:48:46,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:48:46,815 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:48:46,815 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:48:46,815 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [314422729] [2022-03-18 00:48:46,815 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [314422729] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:48:46,815 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:48:46,815 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-18 00:48:50,559 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:48:50,559 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1711990322] [2022-03-18 00:48:50,559 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1711990322] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:48:50,559 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:48:50,559 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [67] imperfect sequences [] total 67 [2022-03-18 00:48:50,559 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [183548528] [2022-03-18 00:48:50,559 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:48:50,559 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 67 states [2022-03-18 00:48:50,559 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:48:50,560 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2022-03-18 00:48:50,560 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=4291, Unknown=0, NotChecked=0, Total=4422 [2022-03-18 00:48:50,560 INFO L87 Difference]: Start difference. First operand 202 states and 203 transitions. Second operand has 67 states, 67 states have (on average 2.925373134328358) internal successors, (196), 66 states have internal predecessors, (196), 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) [2022-03-18 00:48:55,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:48:55,439 INFO L93 Difference]: Finished difference Result 214 states and 218 transitions. [2022-03-18 00:48:55,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2022-03-18 00:48:55,440 INFO L78 Accepts]: Start accepts. Automaton has has 67 states, 67 states have (on average 2.925373134328358) internal successors, (196), 66 states have internal predecessors, (196), 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 200 [2022-03-18 00:48:55,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:48:55,440 INFO L225 Difference]: With dead ends: 214 [2022-03-18 00:48:55,440 INFO L226 Difference]: Without dead ends: 206 [2022-03-18 00:48:55,441 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 264 GetRequests, 8 SyntacticMatches, 127 SemanticMatches, 129 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2016 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=387, Invalid=16643, Unknown=0, NotChecked=0, Total=17030 [2022-03-18 00:48:55,441 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 139 mSDsluCounter, 322 mSDsCounter, 0 mSdLazyCounter, 12737 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 139 SdHoareTripleChecker+Valid, 334 SdHoareTripleChecker+Invalid, 12804 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 12737 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.3s IncrementalHoareTripleChecker+Time [2022-03-18 00:48:55,441 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [139 Valid, 334 Invalid, 12804 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 12737 Invalid, 0 Unknown, 0 Unchecked, 3.3s Time] [2022-03-18 00:48:55,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2022-03-18 00:48:55,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 205. [2022-03-18 00:48:55,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 205 states, 200 states have (on average 1.01) internal successors, (202), 200 states have internal predecessors, (202), 3 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) [2022-03-18 00:48:55,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 206 transitions. [2022-03-18 00:48:55,472 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 206 transitions. Word has length 200 [2022-03-18 00:48:55,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:48:55,473 INFO L478 AbstractCegarLoop]: Abstraction has 205 states and 206 transitions. [2022-03-18 00:48:55,473 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 67 states, 67 states have (on average 2.925373134328358) internal successors, (196), 66 states have internal predecessors, (196), 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) [2022-03-18 00:48:55,473 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 206 transitions. [2022-03-18 00:48:55,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 204 [2022-03-18 00:48:55,473 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:48:55,474 INFO L500 BasicCegarLoop]: trace histogram [64, 64, 64, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:48:55,474 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2022-03-18 00:48:55,474 INFO L403 AbstractCegarLoop]: === Iteration 66 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:48:55,474 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:48:55,474 INFO L85 PathProgramCache]: Analyzing trace with hash -1535856189, now seen corresponding path program 64 times [2022-03-18 00:48:55,474 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:48:55,474 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [123502725] [2022-03-18 00:48:55,595 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-18 00:48:55,595 INFO L85 PathProgramCache]: Analyzing trace with hash -1780484080, now seen corresponding path program 1 times [2022-03-18 00:48:55,595 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:48:55,595 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1577083404] [2022-03-18 00:48:55,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:48:55,596 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:48:55,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:48:55,609 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:48:55,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:48:55,611 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:48:55,611 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:48:55,611 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1577083404] [2022-03-18 00:48:55,611 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1577083404] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:48:55,612 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:48:55,612 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-18 00:48:59,575 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:48:59,576 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [123502725] [2022-03-18 00:48:59,576 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [123502725] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:48:59,576 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:48:59,576 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [68] imperfect sequences [] total 68 [2022-03-18 00:48:59,576 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1175266145] [2022-03-18 00:48:59,576 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:48:59,576 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 68 states [2022-03-18 00:48:59,576 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:48:59,576 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2022-03-18 00:48:59,577 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=4423, Unknown=0, NotChecked=0, Total=4556 [2022-03-18 00:48:59,577 INFO L87 Difference]: Start difference. First operand 205 states and 206 transitions. Second operand has 68 states, 68 states have (on average 2.926470588235294) internal successors, (199), 67 states have internal predecessors, (199), 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) [2022-03-18 00:49:04,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:49:04,831 INFO L93 Difference]: Finished difference Result 217 states and 221 transitions. [2022-03-18 00:49:04,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2022-03-18 00:49:04,832 INFO L78 Accepts]: Start accepts. Automaton has has 68 states, 68 states have (on average 2.926470588235294) internal successors, (199), 67 states have internal predecessors, (199), 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 203 [2022-03-18 00:49:04,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:49:04,833 INFO L225 Difference]: With dead ends: 217 [2022-03-18 00:49:04,833 INFO L226 Difference]: Without dead ends: 209 [2022-03-18 00:49:04,833 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 268 GetRequests, 8 SyntacticMatches, 129 SemanticMatches, 131 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2080 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=393, Invalid=17163, Unknown=0, NotChecked=0, Total=17556 [2022-03-18 00:49:04,833 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 141 mSDsluCounter, 327 mSDsCounter, 0 mSdLazyCounter, 13131 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 141 SdHoareTripleChecker+Valid, 339 SdHoareTripleChecker+Invalid, 13199 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 13131 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.6s IncrementalHoareTripleChecker+Time [2022-03-18 00:49:04,834 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [141 Valid, 339 Invalid, 13199 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 13131 Invalid, 0 Unknown, 0 Unchecked, 3.6s Time] [2022-03-18 00:49:04,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2022-03-18 00:49:04,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 208. [2022-03-18 00:49:04,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 208 states, 203 states have (on average 1.0098522167487685) internal successors, (205), 203 states have internal predecessors, (205), 3 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) [2022-03-18 00:49:04,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 209 transitions. [2022-03-18 00:49:04,865 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 209 transitions. Word has length 203 [2022-03-18 00:49:04,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:49:04,865 INFO L478 AbstractCegarLoop]: Abstraction has 208 states and 209 transitions. [2022-03-18 00:49:04,865 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 68 states, 68 states have (on average 2.926470588235294) internal successors, (199), 67 states have internal predecessors, (199), 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) [2022-03-18 00:49:04,865 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 209 transitions. [2022-03-18 00:49:04,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 207 [2022-03-18 00:49:04,866 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:49:04,866 INFO L500 BasicCegarLoop]: trace histogram [65, 65, 65, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:49:04,866 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2022-03-18 00:49:04,866 INFO L403 AbstractCegarLoop]: === Iteration 67 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:49:04,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:49:04,866 INFO L85 PathProgramCache]: Analyzing trace with hash -2115295861, now seen corresponding path program 65 times [2022-03-18 00:49:04,866 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:49:04,866 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1597370863] [2022-03-18 00:49:04,999 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-18 00:49:04,999 INFO L85 PathProgramCache]: Analyzing trace with hash -1721378736, now seen corresponding path program 1 times [2022-03-18 00:49:04,999 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:49:04,999 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1884830740] [2022-03-18 00:49:04,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:49:04,999 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:49:05,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:49:05,015 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:49:05,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:49:05,023 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:49:05,024 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:49:05,024 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1884830740] [2022-03-18 00:49:05,024 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1884830740] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:49:05,024 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:49:05,024 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-18 00:49:09,133 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:49:09,133 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1597370863] [2022-03-18 00:49:09,133 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1597370863] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:49:09,134 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:49:09,134 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [69] imperfect sequences [] total 69 [2022-03-18 00:49:09,134 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [848073429] [2022-03-18 00:49:09,134 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:49:09,134 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 69 states [2022-03-18 00:49:09,134 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:49:09,134 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2022-03-18 00:49:09,135 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=4557, Unknown=0, NotChecked=0, Total=4692 [2022-03-18 00:49:09,135 INFO L87 Difference]: Start difference. First operand 208 states and 209 transitions. Second operand has 69 states, 69 states have (on average 2.927536231884058) internal successors, (202), 68 states have internal predecessors, (202), 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) [2022-03-18 00:49:14,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:49:14,257 INFO L93 Difference]: Finished difference Result 220 states and 224 transitions. [2022-03-18 00:49:14,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2022-03-18 00:49:14,258 INFO L78 Accepts]: Start accepts. Automaton has has 69 states, 69 states have (on average 2.927536231884058) internal successors, (202), 68 states have internal predecessors, (202), 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 206 [2022-03-18 00:49:14,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:49:14,258 INFO L225 Difference]: With dead ends: 220 [2022-03-18 00:49:14,258 INFO L226 Difference]: Without dead ends: 212 [2022-03-18 00:49:14,259 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 272 GetRequests, 8 SyntacticMatches, 131 SemanticMatches, 133 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2145 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=399, Invalid=17691, Unknown=0, NotChecked=0, Total=18090 [2022-03-18 00:49:14,259 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 143 mSDsluCounter, 332 mSDsCounter, 0 mSdLazyCounter, 13531 mSolverCounterSat, 69 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 143 SdHoareTripleChecker+Valid, 344 SdHoareTripleChecker+Invalid, 13600 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 13531 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.5s IncrementalHoareTripleChecker+Time [2022-03-18 00:49:14,259 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [143 Valid, 344 Invalid, 13600 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 13531 Invalid, 0 Unknown, 0 Unchecked, 3.5s Time] [2022-03-18 00:49:14,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2022-03-18 00:49:14,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 211. [2022-03-18 00:49:14,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 211 states, 206 states have (on average 1.0097087378640777) internal successors, (208), 206 states have internal predecessors, (208), 3 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) [2022-03-18 00:49:14,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 212 transitions. [2022-03-18 00:49:14,291 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 212 transitions. Word has length 206 [2022-03-18 00:49:14,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:49:14,291 INFO L478 AbstractCegarLoop]: Abstraction has 211 states and 212 transitions. [2022-03-18 00:49:14,291 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 69 states, 69 states have (on average 2.927536231884058) internal successors, (202), 68 states have internal predecessors, (202), 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) [2022-03-18 00:49:14,291 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 212 transitions. [2022-03-18 00:49:14,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 210 [2022-03-18 00:49:14,291 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:49:14,292 INFO L500 BasicCegarLoop]: trace histogram [66, 66, 66, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:49:14,292 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2022-03-18 00:49:14,292 INFO L403 AbstractCegarLoop]: === Iteration 68 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:49:14,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:49:14,292 INFO L85 PathProgramCache]: Analyzing trace with hash 1565965507, now seen corresponding path program 66 times [2022-03-18 00:49:14,292 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:49:14,292 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1714011938] [2022-03-18 00:49:14,415 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-18 00:49:14,416 INFO L85 PathProgramCache]: Analyzing trace with hash -1662273392, now seen corresponding path program 1 times [2022-03-18 00:49:14,416 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:49:14,416 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1942266532] [2022-03-18 00:49:14,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:49:14,416 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:49:14,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:49:14,433 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:49:14,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:49:14,435 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:49:14,435 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:49:14,435 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1942266532] [2022-03-18 00:49:14,435 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1942266532] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:49:14,435 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:49:14,435 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-18 00:49:18,529 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:49:18,530 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1714011938] [2022-03-18 00:49:18,530 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1714011938] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:49:18,530 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:49:18,530 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [70] imperfect sequences [] total 70 [2022-03-18 00:49:18,530 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1780471725] [2022-03-18 00:49:18,530 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:49:18,530 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 70 states [2022-03-18 00:49:18,530 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:49:18,530 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2022-03-18 00:49:18,531 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=4693, Unknown=0, NotChecked=0, Total=4830 [2022-03-18 00:49:18,531 INFO L87 Difference]: Start difference. First operand 211 states and 212 transitions. Second operand has 70 states, 70 states have (on average 2.9285714285714284) internal successors, (205), 69 states have internal predecessors, (205), 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) [2022-03-18 00:49:23,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:49:23,856 INFO L93 Difference]: Finished difference Result 223 states and 227 transitions. [2022-03-18 00:49:23,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2022-03-18 00:49:23,857 INFO L78 Accepts]: Start accepts. Automaton has has 70 states, 70 states have (on average 2.9285714285714284) internal successors, (205), 69 states have internal predecessors, (205), 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 209 [2022-03-18 00:49:23,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:49:23,858 INFO L225 Difference]: With dead ends: 223 [2022-03-18 00:49:23,858 INFO L226 Difference]: Without dead ends: 215 [2022-03-18 00:49:23,859 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 276 GetRequests, 8 SyntacticMatches, 133 SemanticMatches, 135 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2211 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=405, Invalid=18227, Unknown=0, NotChecked=0, Total=18632 [2022-03-18 00:49:23,859 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 145 mSDsluCounter, 337 mSDsCounter, 0 mSdLazyCounter, 13937 mSolverCounterSat, 70 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 145 SdHoareTripleChecker+Valid, 349 SdHoareTripleChecker+Invalid, 14007 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 70 IncrementalHoareTripleChecker+Valid, 13937 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.6s IncrementalHoareTripleChecker+Time [2022-03-18 00:49:23,860 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [145 Valid, 349 Invalid, 14007 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [70 Valid, 13937 Invalid, 0 Unknown, 0 Unchecked, 3.6s Time] [2022-03-18 00:49:23,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2022-03-18 00:49:23,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 214. [2022-03-18 00:49:23,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 214 states, 209 states have (on average 1.0095693779904307) internal successors, (211), 209 states have internal predecessors, (211), 3 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) [2022-03-18 00:49:23,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 215 transitions. [2022-03-18 00:49:23,910 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 215 transitions. Word has length 209 [2022-03-18 00:49:23,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:49:23,910 INFO L478 AbstractCegarLoop]: Abstraction has 214 states and 215 transitions. [2022-03-18 00:49:23,911 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 70 states, 70 states have (on average 2.9285714285714284) internal successors, (205), 69 states have internal predecessors, (205), 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) [2022-03-18 00:49:23,911 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 215 transitions. [2022-03-18 00:49:23,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 213 [2022-03-18 00:49:23,911 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:49:23,911 INFO L500 BasicCegarLoop]: trace histogram [67, 67, 67, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:49:23,911 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2022-03-18 00:49:23,911 INFO L403 AbstractCegarLoop]: === Iteration 69 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:49:23,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:49:23,912 INFO L85 PathProgramCache]: Analyzing trace with hash -1966523765, now seen corresponding path program 67 times [2022-03-18 00:49:23,912 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:49:23,912 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [364984510] [2022-03-18 00:49:24,048 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-18 00:49:24,048 INFO L85 PathProgramCache]: Analyzing trace with hash -1603168048, now seen corresponding path program 1 times [2022-03-18 00:49:24,048 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:49:24,049 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1954001110] [2022-03-18 00:49:24,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:49:24,049 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:49:24,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:49:24,061 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:49:24,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:49:24,063 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:49:24,063 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:49:24,064 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1954001110] [2022-03-18 00:49:24,064 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1954001110] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:49:24,064 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:49:24,064 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-18 00:49:28,333 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:49:28,334 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [364984510] [2022-03-18 00:49:28,334 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [364984510] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:49:28,334 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:49:28,334 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [71] imperfect sequences [] total 71 [2022-03-18 00:49:28,334 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1676206070] [2022-03-18 00:49:28,334 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:49:28,334 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 71 states [2022-03-18 00:49:28,334 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:49:28,334 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2022-03-18 00:49:28,335 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=4831, Unknown=0, NotChecked=0, Total=4970 [2022-03-18 00:49:28,335 INFO L87 Difference]: Start difference. First operand 214 states and 215 transitions. Second operand has 71 states, 71 states have (on average 2.9295774647887325) internal successors, (208), 70 states have internal predecessors, (208), 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) [2022-03-18 00:49:33,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:49:33,667 INFO L93 Difference]: Finished difference Result 226 states and 230 transitions. [2022-03-18 00:49:33,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2022-03-18 00:49:33,668 INFO L78 Accepts]: Start accepts. Automaton has has 71 states, 71 states have (on average 2.9295774647887325) internal successors, (208), 70 states have internal predecessors, (208), 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 212 [2022-03-18 00:49:33,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:49:33,668 INFO L225 Difference]: With dead ends: 226 [2022-03-18 00:49:33,669 INFO L226 Difference]: Without dead ends: 218 [2022-03-18 00:49:33,669 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 280 GetRequests, 8 SyntacticMatches, 135 SemanticMatches, 137 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2278 ImplicationChecksByTransitivity, 5.7s TimeCoverageRelationStatistics Valid=411, Invalid=18771, Unknown=0, NotChecked=0, Total=19182 [2022-03-18 00:49:33,670 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 147 mSDsluCounter, 342 mSDsCounter, 0 mSdLazyCounter, 14349 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 147 SdHoareTripleChecker+Valid, 354 SdHoareTripleChecker+Invalid, 14420 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 14349 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.6s IncrementalHoareTripleChecker+Time [2022-03-18 00:49:33,670 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [147 Valid, 354 Invalid, 14420 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 14349 Invalid, 0 Unknown, 0 Unchecked, 3.6s Time] [2022-03-18 00:49:33,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2022-03-18 00:49:33,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 217. [2022-03-18 00:49:33,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 217 states, 212 states have (on average 1.009433962264151) internal successors, (214), 212 states have internal predecessors, (214), 3 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) [2022-03-18 00:49:33,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 218 transitions. [2022-03-18 00:49:33,703 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 218 transitions. Word has length 212 [2022-03-18 00:49:33,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:49:33,704 INFO L478 AbstractCegarLoop]: Abstraction has 217 states and 218 transitions. [2022-03-18 00:49:33,704 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 71 states, 71 states have (on average 2.9295774647887325) internal successors, (208), 70 states have internal predecessors, (208), 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) [2022-03-18 00:49:33,704 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 218 transitions. [2022-03-18 00:49:33,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 216 [2022-03-18 00:49:33,704 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:49:33,705 INFO L500 BasicCegarLoop]: trace histogram [68, 68, 68, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:49:33,705 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2022-03-18 00:49:33,705 INFO L403 AbstractCegarLoop]: === Iteration 70 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:49:33,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:49:33,705 INFO L85 PathProgramCache]: Analyzing trace with hash 1229227971, now seen corresponding path program 68 times [2022-03-18 00:49:33,705 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:49:33,705 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [538493160] [2022-03-18 00:49:33,842 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-18 00:49:33,842 INFO L85 PathProgramCache]: Analyzing trace with hash -1544062704, now seen corresponding path program 1 times [2022-03-18 00:49:33,842 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:49:33,842 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1459026195] [2022-03-18 00:49:33,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:49:33,843 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:49:33,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:49:33,855 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:49:33,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:49:33,857 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:49:33,858 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:49:33,858 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1459026195] [2022-03-18 00:49:33,858 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1459026195] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:49:33,858 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:49:33,858 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-18 00:49:38,233 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:49:38,233 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [538493160] [2022-03-18 00:49:38,233 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [538493160] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:49:38,233 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:49:38,233 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [72] imperfect sequences [] total 72 [2022-03-18 00:49:38,233 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1941433476] [2022-03-18 00:49:38,233 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:49:38,233 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 72 states [2022-03-18 00:49:38,233 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:49:38,234 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2022-03-18 00:49:38,234 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=4971, Unknown=0, NotChecked=0, Total=5112 [2022-03-18 00:49:38,234 INFO L87 Difference]: Start difference. First operand 217 states and 218 transitions. Second operand has 72 states, 72 states have (on average 2.9305555555555554) internal successors, (211), 71 states have internal predecessors, (211), 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) [2022-03-18 00:49:44,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:49:44,098 INFO L93 Difference]: Finished difference Result 229 states and 233 transitions. [2022-03-18 00:49:44,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2022-03-18 00:49:44,098 INFO L78 Accepts]: Start accepts. Automaton has has 72 states, 72 states have (on average 2.9305555555555554) internal successors, (211), 71 states have internal predecessors, (211), 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 215 [2022-03-18 00:49:44,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:49:44,099 INFO L225 Difference]: With dead ends: 229 [2022-03-18 00:49:44,099 INFO L226 Difference]: Without dead ends: 221 [2022-03-18 00:49:44,100 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 284 GetRequests, 8 SyntacticMatches, 137 SemanticMatches, 139 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2346 ImplicationChecksByTransitivity, 5.9s TimeCoverageRelationStatistics Valid=417, Invalid=19323, Unknown=0, NotChecked=0, Total=19740 [2022-03-18 00:49:44,100 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 149 mSDsluCounter, 347 mSDsCounter, 0 mSdLazyCounter, 14767 mSolverCounterSat, 72 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 149 SdHoareTripleChecker+Valid, 359 SdHoareTripleChecker+Invalid, 14839 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 14767 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.0s IncrementalHoareTripleChecker+Time [2022-03-18 00:49:44,100 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [149 Valid, 359 Invalid, 14839 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [72 Valid, 14767 Invalid, 0 Unknown, 0 Unchecked, 4.0s Time] [2022-03-18 00:49:44,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2022-03-18 00:49:44,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 220. [2022-03-18 00:49:44,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 220 states, 215 states have (on average 1.0093023255813953) internal successors, (217), 215 states have internal predecessors, (217), 3 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) [2022-03-18 00:49:44,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 220 states to 220 states and 221 transitions. [2022-03-18 00:49:44,133 INFO L78 Accepts]: Start accepts. Automaton has 220 states and 221 transitions. Word has length 215 [2022-03-18 00:49:44,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:49:44,133 INFO L478 AbstractCegarLoop]: Abstraction has 220 states and 221 transitions. [2022-03-18 00:49:44,134 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 72 states, 72 states have (on average 2.9305555555555554) internal successors, (211), 71 states have internal predecessors, (211), 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) [2022-03-18 00:49:44,134 INFO L276 IsEmpty]: Start isEmpty. Operand 220 states and 221 transitions. [2022-03-18 00:49:44,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 219 [2022-03-18 00:49:44,134 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:49:44,134 INFO L500 BasicCegarLoop]: trace histogram [69, 69, 69, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:49:44,134 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2022-03-18 00:49:44,134 INFO L403 AbstractCegarLoop]: === Iteration 71 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:49:44,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:49:44,135 INFO L85 PathProgramCache]: Analyzing trace with hash -670855285, now seen corresponding path program 69 times [2022-03-18 00:49:44,135 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:49:44,135 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [327809203] [2022-03-18 00:49:44,372 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-18 00:49:44,372 INFO L85 PathProgramCache]: Analyzing trace with hash -1484957360, now seen corresponding path program 1 times [2022-03-18 00:49:44,372 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:49:44,372 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1992949225] [2022-03-18 00:49:44,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:49:44,373 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:49:44,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:49:44,388 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:49:44,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:49:44,390 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:49:44,391 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:49:44,391 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1992949225] [2022-03-18 00:49:44,391 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1992949225] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:49:44,391 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:49:44,391 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-18 00:49:48,999 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:49:48,999 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [327809203] [2022-03-18 00:49:48,999 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [327809203] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:49:48,999 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:49:49,000 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [73] imperfect sequences [] total 73 [2022-03-18 00:49:49,000 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [556394337] [2022-03-18 00:49:49,000 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:49:49,000 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 73 states [2022-03-18 00:49:49,000 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:49:49,000 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2022-03-18 00:49:49,000 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=5113, Unknown=0, NotChecked=0, Total=5256 [2022-03-18 00:49:49,000 INFO L87 Difference]: Start difference. First operand 220 states and 221 transitions. Second operand has 73 states, 73 states have (on average 2.9315068493150687) internal successors, (214), 72 states have internal predecessors, (214), 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) [2022-03-18 00:49:55,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:49:55,019 INFO L93 Difference]: Finished difference Result 232 states and 236 transitions. [2022-03-18 00:49:55,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2022-03-18 00:49:55,020 INFO L78 Accepts]: Start accepts. Automaton has has 73 states, 73 states have (on average 2.9315068493150687) internal successors, (214), 72 states have internal predecessors, (214), 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 218 [2022-03-18 00:49:55,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:49:55,020 INFO L225 Difference]: With dead ends: 232 [2022-03-18 00:49:55,020 INFO L226 Difference]: Without dead ends: 224 [2022-03-18 00:49:55,021 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 288 GetRequests, 8 SyntacticMatches, 139 SemanticMatches, 141 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2415 ImplicationChecksByTransitivity, 6.2s TimeCoverageRelationStatistics Valid=423, Invalid=19883, Unknown=0, NotChecked=0, Total=20306 [2022-03-18 00:49:55,021 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 151 mSDsluCounter, 352 mSDsCounter, 0 mSdLazyCounter, 15191 mSolverCounterSat, 73 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 151 SdHoareTripleChecker+Valid, 364 SdHoareTripleChecker+Invalid, 15264 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 73 IncrementalHoareTripleChecker+Valid, 15191 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.1s IncrementalHoareTripleChecker+Time [2022-03-18 00:49:55,022 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [151 Valid, 364 Invalid, 15264 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [73 Valid, 15191 Invalid, 0 Unknown, 0 Unchecked, 4.1s Time] [2022-03-18 00:49:55,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2022-03-18 00:49:55,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 223. [2022-03-18 00:49:55,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 223 states, 218 states have (on average 1.0091743119266054) internal successors, (220), 218 states have internal predecessors, (220), 3 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) [2022-03-18 00:49:55,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223 states to 223 states and 224 transitions. [2022-03-18 00:49:55,058 INFO L78 Accepts]: Start accepts. Automaton has 223 states and 224 transitions. Word has length 218 [2022-03-18 00:49:55,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:49:55,059 INFO L478 AbstractCegarLoop]: Abstraction has 223 states and 224 transitions. [2022-03-18 00:49:55,059 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 73 states, 73 states have (on average 2.9315068493150687) internal successors, (214), 72 states have internal predecessors, (214), 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) [2022-03-18 00:49:55,059 INFO L276 IsEmpty]: Start isEmpty. Operand 223 states and 224 transitions. [2022-03-18 00:49:55,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 222 [2022-03-18 00:49:55,060 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:49:55,060 INFO L500 BasicCegarLoop]: trace histogram [70, 70, 70, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:49:55,060 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2022-03-18 00:49:55,060 INFO L403 AbstractCegarLoop]: === Iteration 72 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:49:55,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:49:55,060 INFO L85 PathProgramCache]: Analyzing trace with hash 1617826499, now seen corresponding path program 70 times [2022-03-18 00:49:55,060 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:49:55,060 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [354196264] [2022-03-18 00:49:55,179 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-18 00:49:55,179 INFO L85 PathProgramCache]: Analyzing trace with hash -1425852016, now seen corresponding path program 1 times [2022-03-18 00:49:55,179 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:49:55,179 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1950246755] [2022-03-18 00:49:55,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:49:55,179 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:49:55,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:49:55,192 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:49:55,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:49:55,194 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:49:55,194 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:49:55,194 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1950246755] [2022-03-18 00:49:55,194 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1950246755] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:49:55,194 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:49:55,194 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-18 00:49:59,846 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:49:59,846 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [354196264] [2022-03-18 00:49:59,846 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [354196264] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:49:59,846 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:49:59,846 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [74] imperfect sequences [] total 74 [2022-03-18 00:49:59,846 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [579415763] [2022-03-18 00:49:59,846 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:49:59,847 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 74 states [2022-03-18 00:49:59,847 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:49:59,847 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2022-03-18 00:49:59,847 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=5257, Unknown=0, NotChecked=0, Total=5402 [2022-03-18 00:49:59,847 INFO L87 Difference]: Start difference. First operand 223 states and 224 transitions. Second operand has 74 states, 74 states have (on average 2.9324324324324325) internal successors, (217), 73 states have internal predecessors, (217), 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) [2022-03-18 00:50:06,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:50:06,100 INFO L93 Difference]: Finished difference Result 235 states and 239 transitions. [2022-03-18 00:50:06,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2022-03-18 00:50:06,100 INFO L78 Accepts]: Start accepts. Automaton has has 74 states, 74 states have (on average 2.9324324324324325) internal successors, (217), 73 states have internal predecessors, (217), 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 221 [2022-03-18 00:50:06,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:50:06,101 INFO L225 Difference]: With dead ends: 235 [2022-03-18 00:50:06,101 INFO L226 Difference]: Without dead ends: 227 [2022-03-18 00:50:06,102 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 292 GetRequests, 8 SyntacticMatches, 141 SemanticMatches, 143 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2485 ImplicationChecksByTransitivity, 6.3s TimeCoverageRelationStatistics Valid=429, Invalid=20451, Unknown=0, NotChecked=0, Total=20880 [2022-03-18 00:50:06,102 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 153 mSDsluCounter, 357 mSDsCounter, 0 mSdLazyCounter, 15621 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 153 SdHoareTripleChecker+Valid, 369 SdHoareTripleChecker+Invalid, 15695 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 15621 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.3s IncrementalHoareTripleChecker+Time [2022-03-18 00:50:06,102 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [153 Valid, 369 Invalid, 15695 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 15621 Invalid, 0 Unknown, 0 Unchecked, 4.3s Time] [2022-03-18 00:50:06,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2022-03-18 00:50:06,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 226. [2022-03-18 00:50:06,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 226 states, 221 states have (on average 1.009049773755656) internal successors, (223), 221 states have internal predecessors, (223), 3 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) [2022-03-18 00:50:06,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 226 states to 226 states and 227 transitions. [2022-03-18 00:50:06,138 INFO L78 Accepts]: Start accepts. Automaton has 226 states and 227 transitions. Word has length 221 [2022-03-18 00:50:06,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:50:06,139 INFO L478 AbstractCegarLoop]: Abstraction has 226 states and 227 transitions. [2022-03-18 00:50:06,139 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 74 states, 74 states have (on average 2.9324324324324325) internal successors, (217), 73 states have internal predecessors, (217), 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) [2022-03-18 00:50:06,139 INFO L276 IsEmpty]: Start isEmpty. Operand 226 states and 227 transitions. [2022-03-18 00:50:06,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 225 [2022-03-18 00:50:06,139 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:50:06,139 INFO L500 BasicCegarLoop]: trace histogram [71, 71, 71, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:50:06,140 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2022-03-18 00:50:06,140 INFO L403 AbstractCegarLoop]: === Iteration 73 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:50:06,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:50:06,140 INFO L85 PathProgramCache]: Analyzing trace with hash 1131029643, now seen corresponding path program 71 times [2022-03-18 00:50:06,140 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:50:06,140 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1954107535] [2022-03-18 00:50:06,269 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-18 00:50:06,269 INFO L85 PathProgramCache]: Analyzing trace with hash -1366746672, now seen corresponding path program 1 times [2022-03-18 00:50:06,269 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:50:06,269 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1389352370] [2022-03-18 00:50:06,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:50:06,269 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:50:06,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:50:06,283 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:50:06,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:50:06,289 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:50:06,289 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:50:06,289 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1389352370] [2022-03-18 00:50:06,289 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1389352370] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:50:06,289 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:50:06,289 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-18 00:50:11,285 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:50:11,285 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1954107535] [2022-03-18 00:50:11,285 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1954107535] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:50:11,285 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:50:11,285 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [75] imperfect sequences [] total 75 [2022-03-18 00:50:11,285 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1318385678] [2022-03-18 00:50:11,285 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:50:11,285 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 75 states [2022-03-18 00:50:11,285 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:50:11,286 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2022-03-18 00:50:11,286 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=5403, Unknown=0, NotChecked=0, Total=5550 [2022-03-18 00:50:11,286 INFO L87 Difference]: Start difference. First operand 226 states and 227 transitions. Second operand has 75 states, 75 states have (on average 2.933333333333333) internal successors, (220), 74 states have internal predecessors, (220), 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) [2022-03-18 00:50:17,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:50:17,325 INFO L93 Difference]: Finished difference Result 238 states and 242 transitions. [2022-03-18 00:50:17,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2022-03-18 00:50:17,325 INFO L78 Accepts]: Start accepts. Automaton has has 75 states, 75 states have (on average 2.933333333333333) internal successors, (220), 74 states have internal predecessors, (220), 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 224 [2022-03-18 00:50:17,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:50:17,326 INFO L225 Difference]: With dead ends: 238 [2022-03-18 00:50:17,326 INFO L226 Difference]: Without dead ends: 230 [2022-03-18 00:50:17,327 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 296 GetRequests, 8 SyntacticMatches, 143 SemanticMatches, 145 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2556 ImplicationChecksByTransitivity, 6.6s TimeCoverageRelationStatistics Valid=435, Invalid=21027, Unknown=0, NotChecked=0, Total=21462 [2022-03-18 00:50:17,327 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 155 mSDsluCounter, 362 mSDsCounter, 0 mSdLazyCounter, 16057 mSolverCounterSat, 75 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 155 SdHoareTripleChecker+Valid, 374 SdHoareTripleChecker+Invalid, 16132 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 75 IncrementalHoareTripleChecker+Valid, 16057 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.1s IncrementalHoareTripleChecker+Time [2022-03-18 00:50:17,327 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [155 Valid, 374 Invalid, 16132 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [75 Valid, 16057 Invalid, 0 Unknown, 0 Unchecked, 4.1s Time] [2022-03-18 00:50:17,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2022-03-18 00:50:17,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 229. [2022-03-18 00:50:17,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 229 states, 224 states have (on average 1.0089285714285714) internal successors, (226), 224 states have internal predecessors, (226), 3 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) [2022-03-18 00:50:17,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 230 transitions. [2022-03-18 00:50:17,368 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 230 transitions. Word has length 224 [2022-03-18 00:50:17,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:50:17,368 INFO L478 AbstractCegarLoop]: Abstraction has 229 states and 230 transitions. [2022-03-18 00:50:17,369 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 75 states, 75 states have (on average 2.933333333333333) internal successors, (220), 74 states have internal predecessors, (220), 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) [2022-03-18 00:50:17,369 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 230 transitions. [2022-03-18 00:50:17,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 228 [2022-03-18 00:50:17,369 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:50:17,369 INFO L500 BasicCegarLoop]: trace histogram [72, 72, 72, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:50:17,370 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2022-03-18 00:50:17,370 INFO L403 AbstractCegarLoop]: === Iteration 74 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:50:17,370 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:50:17,370 INFO L85 PathProgramCache]: Analyzing trace with hash -1224516157, now seen corresponding path program 72 times [2022-03-18 00:50:17,370 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:50:17,370 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [893525246] [2022-03-18 00:50:17,486 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-18 00:50:17,486 INFO L85 PathProgramCache]: Analyzing trace with hash -1307641328, now seen corresponding path program 1 times [2022-03-18 00:50:17,486 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:50:17,486 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [131693956] [2022-03-18 00:50:17,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:50:17,486 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:50:17,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:50:17,510 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:50:17,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:50:17,512 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:50:17,512 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:50:17,512 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [131693956] [2022-03-18 00:50:17,512 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [131693956] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:50:17,512 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:50:17,512 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-18 00:50:22,393 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:50:22,393 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [893525246] [2022-03-18 00:50:22,394 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [893525246] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:50:22,394 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:50:22,394 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [76] imperfect sequences [] total 76 [2022-03-18 00:50:22,394 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [902266519] [2022-03-18 00:50:22,394 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:50:22,394 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 76 states [2022-03-18 00:50:22,394 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:50:22,394 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2022-03-18 00:50:22,395 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=5551, Unknown=0, NotChecked=0, Total=5700 [2022-03-18 00:50:22,395 INFO L87 Difference]: Start difference. First operand 229 states and 230 transitions. Second operand has 76 states, 76 states have (on average 2.9342105263157894) internal successors, (223), 75 states have internal predecessors, (223), 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) [2022-03-18 00:50:28,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:50:28,764 INFO L93 Difference]: Finished difference Result 241 states and 245 transitions. [2022-03-18 00:50:28,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2022-03-18 00:50:28,764 INFO L78 Accepts]: Start accepts. Automaton has has 76 states, 76 states have (on average 2.9342105263157894) internal successors, (223), 75 states have internal predecessors, (223), 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 227 [2022-03-18 00:50:28,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:50:28,765 INFO L225 Difference]: With dead ends: 241 [2022-03-18 00:50:28,765 INFO L226 Difference]: Without dead ends: 233 [2022-03-18 00:50:28,766 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 300 GetRequests, 8 SyntacticMatches, 145 SemanticMatches, 147 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2628 ImplicationChecksByTransitivity, 6.6s TimeCoverageRelationStatistics Valid=441, Invalid=21611, Unknown=0, NotChecked=0, Total=22052 [2022-03-18 00:50:28,766 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 157 mSDsluCounter, 367 mSDsCounter, 0 mSdLazyCounter, 16499 mSolverCounterSat, 76 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 157 SdHoareTripleChecker+Valid, 379 SdHoareTripleChecker+Invalid, 16575 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 16499 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.4s IncrementalHoareTripleChecker+Time [2022-03-18 00:50:28,766 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [157 Valid, 379 Invalid, 16575 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [76 Valid, 16499 Invalid, 0 Unknown, 0 Unchecked, 4.4s Time] [2022-03-18 00:50:28,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2022-03-18 00:50:28,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 232. [2022-03-18 00:50:28,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 232 states, 227 states have (on average 1.0088105726872247) internal successors, (229), 227 states have internal predecessors, (229), 3 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) [2022-03-18 00:50:28,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 232 states to 232 states and 233 transitions. [2022-03-18 00:50:28,809 INFO L78 Accepts]: Start accepts. Automaton has 232 states and 233 transitions. Word has length 227 [2022-03-18 00:50:28,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:50:28,809 INFO L478 AbstractCegarLoop]: Abstraction has 232 states and 233 transitions. [2022-03-18 00:50:28,809 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 76 states, 76 states have (on average 2.9342105263157894) internal successors, (223), 75 states have internal predecessors, (223), 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) [2022-03-18 00:50:28,809 INFO L276 IsEmpty]: Start isEmpty. Operand 232 states and 233 transitions. [2022-03-18 00:50:28,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 231 [2022-03-18 00:50:28,810 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:50:28,810 INFO L500 BasicCegarLoop]: trace histogram [73, 73, 73, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:50:28,810 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2022-03-18 00:50:28,810 INFO L403 AbstractCegarLoop]: === Iteration 75 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:50:28,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:50:28,810 INFO L85 PathProgramCache]: Analyzing trace with hash 181205387, now seen corresponding path program 73 times [2022-03-18 00:50:28,810 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:50:28,810 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [655771848] [2022-03-18 00:50:28,940 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-18 00:50:28,940 INFO L85 PathProgramCache]: Analyzing trace with hash -1248535984, now seen corresponding path program 1 times [2022-03-18 00:50:28,940 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:50:28,940 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1937313445] [2022-03-18 00:50:28,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:50:28,940 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:50:28,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:50:28,958 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:50:28,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:50:28,960 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:50:28,960 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:50:28,960 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1937313445] [2022-03-18 00:50:28,961 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1937313445] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:50:28,961 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:50:28,961 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-18 00:50:33,913 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:50:33,914 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [655771848] [2022-03-18 00:50:33,914 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [655771848] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:50:33,914 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:50:33,914 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [77] imperfect sequences [] total 77 [2022-03-18 00:50:33,914 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [78011131] [2022-03-18 00:50:33,914 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:50:33,914 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 77 states [2022-03-18 00:50:33,914 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:50:33,914 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2022-03-18 00:50:33,915 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=5701, Unknown=0, NotChecked=0, Total=5852 [2022-03-18 00:50:33,915 INFO L87 Difference]: Start difference. First operand 232 states and 233 transitions. Second operand has 77 states, 77 states have (on average 2.935064935064935) internal successors, (226), 76 states have internal predecessors, (226), 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) [2022-03-18 00:50:40,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:50:40,410 INFO L93 Difference]: Finished difference Result 244 states and 248 transitions. [2022-03-18 00:50:40,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2022-03-18 00:50:40,411 INFO L78 Accepts]: Start accepts. Automaton has has 77 states, 77 states have (on average 2.935064935064935) internal successors, (226), 76 states have internal predecessors, (226), 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 230 [2022-03-18 00:50:40,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:50:40,412 INFO L225 Difference]: With dead ends: 244 [2022-03-18 00:50:40,412 INFO L226 Difference]: Without dead ends: 236 [2022-03-18 00:50:40,413 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 304 GetRequests, 8 SyntacticMatches, 147 SemanticMatches, 149 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2701 ImplicationChecksByTransitivity, 6.7s TimeCoverageRelationStatistics Valid=447, Invalid=22203, Unknown=0, NotChecked=0, Total=22650 [2022-03-18 00:50:40,413 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 159 mSDsluCounter, 372 mSDsCounter, 0 mSdLazyCounter, 16947 mSolverCounterSat, 77 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 159 SdHoareTripleChecker+Valid, 384 SdHoareTripleChecker+Invalid, 17024 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 77 IncrementalHoareTripleChecker+Valid, 16947 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.4s IncrementalHoareTripleChecker+Time [2022-03-18 00:50:40,413 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [159 Valid, 384 Invalid, 17024 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [77 Valid, 16947 Invalid, 0 Unknown, 0 Unchecked, 4.4s Time] [2022-03-18 00:50:40,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236 states. [2022-03-18 00:50:40,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236 to 235. [2022-03-18 00:50:40,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 235 states, 230 states have (on average 1.008695652173913) internal successors, (232), 230 states have internal predecessors, (232), 3 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) [2022-03-18 00:50:40,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 236 transitions. [2022-03-18 00:50:40,451 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 236 transitions. Word has length 230 [2022-03-18 00:50:40,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:50:40,451 INFO L478 AbstractCegarLoop]: Abstraction has 235 states and 236 transitions. [2022-03-18 00:50:40,451 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 77 states, 77 states have (on average 2.935064935064935) internal successors, (226), 76 states have internal predecessors, (226), 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) [2022-03-18 00:50:40,451 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 236 transitions. [2022-03-18 00:50:40,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 234 [2022-03-18 00:50:40,452 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:50:40,452 INFO L500 BasicCegarLoop]: trace histogram [74, 74, 74, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:50:40,452 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2022-03-18 00:50:40,452 INFO L403 AbstractCegarLoop]: === Iteration 76 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:50:40,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:50:40,452 INFO L85 PathProgramCache]: Analyzing trace with hash 2100586691, now seen corresponding path program 74 times [2022-03-18 00:50:40,452 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:50:40,452 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1430353180] [2022-03-18 00:50:40,570 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-18 00:50:40,570 INFO L85 PathProgramCache]: Analyzing trace with hash -1189430640, now seen corresponding path program 1 times [2022-03-18 00:50:40,570 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:50:40,570 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [529599992] [2022-03-18 00:50:40,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:50:40,570 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:50:40,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:50:40,587 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:50:40,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:50:40,589 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:50:40,589 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:50:40,589 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [529599992] [2022-03-18 00:50:40,589 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [529599992] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:50:40,589 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:50:40,589 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-18 00:50:45,929 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:50:45,930 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1430353180] [2022-03-18 00:50:45,930 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1430353180] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:50:45,930 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:50:45,930 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [78] imperfect sequences [] total 78 [2022-03-18 00:50:45,930 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [823550281] [2022-03-18 00:50:45,930 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:50:45,931 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 78 states [2022-03-18 00:50:45,931 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:50:45,931 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2022-03-18 00:50:45,931 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=5853, Unknown=0, NotChecked=0, Total=6006 [2022-03-18 00:50:45,932 INFO L87 Difference]: Start difference. First operand 235 states and 236 transitions. Second operand has 78 states, 78 states have (on average 2.9358974358974357) internal successors, (229), 77 states have internal predecessors, (229), 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) [2022-03-18 00:50:52,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:50:52,770 INFO L93 Difference]: Finished difference Result 247 states and 251 transitions. [2022-03-18 00:50:52,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2022-03-18 00:50:52,770 INFO L78 Accepts]: Start accepts. Automaton has has 78 states, 78 states have (on average 2.9358974358974357) internal successors, (229), 77 states have internal predecessors, (229), 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 233 [2022-03-18 00:50:52,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:50:52,771 INFO L225 Difference]: With dead ends: 247 [2022-03-18 00:50:52,771 INFO L226 Difference]: Without dead ends: 239 [2022-03-18 00:50:52,772 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 308 GetRequests, 8 SyntacticMatches, 149 SemanticMatches, 151 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2775 ImplicationChecksByTransitivity, 7.2s TimeCoverageRelationStatistics Valid=453, Invalid=22803, Unknown=0, NotChecked=0, Total=23256 [2022-03-18 00:50:52,772 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 161 mSDsluCounter, 377 mSDsCounter, 0 mSdLazyCounter, 17401 mSolverCounterSat, 78 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 161 SdHoareTripleChecker+Valid, 389 SdHoareTripleChecker+Invalid, 17479 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 78 IncrementalHoareTripleChecker+Valid, 17401 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.7s IncrementalHoareTripleChecker+Time [2022-03-18 00:50:52,772 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [161 Valid, 389 Invalid, 17479 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [78 Valid, 17401 Invalid, 0 Unknown, 0 Unchecked, 4.7s Time] [2022-03-18 00:50:52,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 239 states. [2022-03-18 00:50:52,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 239 to 238. [2022-03-18 00:50:52,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 238 states, 233 states have (on average 1.0085836909871244) internal successors, (235), 233 states have internal predecessors, (235), 3 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) [2022-03-18 00:50:52,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 238 states to 238 states and 239 transitions. [2022-03-18 00:50:52,813 INFO L78 Accepts]: Start accepts. Automaton has 238 states and 239 transitions. Word has length 233 [2022-03-18 00:50:52,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:50:52,813 INFO L478 AbstractCegarLoop]: Abstraction has 238 states and 239 transitions. [2022-03-18 00:50:52,813 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 78 states, 78 states have (on average 2.9358974358974357) internal successors, (229), 77 states have internal predecessors, (229), 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) [2022-03-18 00:50:52,813 INFO L276 IsEmpty]: Start isEmpty. Operand 238 states and 239 transitions. [2022-03-18 00:50:52,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 237 [2022-03-18 00:50:52,814 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:50:52,814 INFO L500 BasicCegarLoop]: trace histogram [75, 75, 75, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:50:52,814 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2022-03-18 00:50:52,814 INFO L403 AbstractCegarLoop]: === Iteration 77 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:50:52,814 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:50:52,814 INFO L85 PathProgramCache]: Analyzing trace with hash -805564789, now seen corresponding path program 75 times [2022-03-18 00:50:52,814 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:50:52,815 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1530929967] [2022-03-18 00:50:52,946 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-18 00:50:52,947 INFO L85 PathProgramCache]: Analyzing trace with hash -1130325296, now seen corresponding path program 1 times [2022-03-18 00:50:52,947 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:50:52,947 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1805686719] [2022-03-18 00:50:52,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:50:52,947 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:50:52,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:50:52,970 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:50:52,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:50:52,975 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:50:52,975 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:50:52,975 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1805686719] [2022-03-18 00:50:52,975 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1805686719] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:50:52,975 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:50:52,975 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-18 00:50:58,471 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:50:58,472 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1530929967] [2022-03-18 00:50:58,472 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1530929967] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:50:58,472 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:50:58,472 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [79] imperfect sequences [] total 79 [2022-03-18 00:50:58,472 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [219097911] [2022-03-18 00:50:58,472 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:50:58,472 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 79 states [2022-03-18 00:50:58,472 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:50:58,473 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 79 interpolants. [2022-03-18 00:50:58,473 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=6007, Unknown=0, NotChecked=0, Total=6162 [2022-03-18 00:50:58,473 INFO L87 Difference]: Start difference. First operand 238 states and 239 transitions. Second operand has 79 states, 79 states have (on average 2.9367088607594938) internal successors, (232), 78 states have internal predecessors, (232), 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) [2022-03-18 00:51:05,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:51:05,650 INFO L93 Difference]: Finished difference Result 250 states and 254 transitions. [2022-03-18 00:51:05,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2022-03-18 00:51:05,650 INFO L78 Accepts]: Start accepts. Automaton has has 79 states, 79 states have (on average 2.9367088607594938) internal successors, (232), 78 states have internal predecessors, (232), 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 236 [2022-03-18 00:51:05,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:51:05,651 INFO L225 Difference]: With dead ends: 250 [2022-03-18 00:51:05,651 INFO L226 Difference]: Without dead ends: 242 [2022-03-18 00:51:05,652 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 312 GetRequests, 8 SyntacticMatches, 151 SemanticMatches, 153 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2850 ImplicationChecksByTransitivity, 7.4s TimeCoverageRelationStatistics Valid=459, Invalid=23411, Unknown=0, NotChecked=0, Total=23870 [2022-03-18 00:51:05,652 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 163 mSDsluCounter, 382 mSDsCounter, 0 mSdLazyCounter, 17861 mSolverCounterSat, 79 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 163 SdHoareTripleChecker+Valid, 394 SdHoareTripleChecker+Invalid, 17940 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 79 IncrementalHoareTripleChecker+Valid, 17861 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.9s IncrementalHoareTripleChecker+Time [2022-03-18 00:51:05,652 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [163 Valid, 394 Invalid, 17940 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [79 Valid, 17861 Invalid, 0 Unknown, 0 Unchecked, 4.9s Time] [2022-03-18 00:51:05,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 242 states. [2022-03-18 00:51:05,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 242 to 241. [2022-03-18 00:51:05,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 241 states, 236 states have (on average 1.0084745762711864) internal successors, (238), 236 states have internal predecessors, (238), 3 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) [2022-03-18 00:51:05,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 242 transitions. [2022-03-18 00:51:05,693 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 242 transitions. Word has length 236 [2022-03-18 00:51:05,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:51:05,693 INFO L478 AbstractCegarLoop]: Abstraction has 241 states and 242 transitions. [2022-03-18 00:51:05,693 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 79 states, 79 states have (on average 2.9367088607594938) internal successors, (232), 78 states have internal predecessors, (232), 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) [2022-03-18 00:51:05,693 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 242 transitions. [2022-03-18 00:51:05,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 240 [2022-03-18 00:51:05,694 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:51:05,694 INFO L500 BasicCegarLoop]: trace histogram [76, 76, 76, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:51:05,694 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2022-03-18 00:51:05,694 INFO L403 AbstractCegarLoop]: === Iteration 78 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:51:05,694 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:51:05,694 INFO L85 PathProgramCache]: Analyzing trace with hash -13552701, now seen corresponding path program 76 times [2022-03-18 00:51:05,695 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:51:05,695 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1500779478] [2022-03-18 00:51:05,829 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-18 00:51:05,829 INFO L85 PathProgramCache]: Analyzing trace with hash -1071219952, now seen corresponding path program 1 times [2022-03-18 00:51:05,830 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:51:05,830 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [255851090] [2022-03-18 00:51:05,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:51:05,830 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:51:05,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:51:05,854 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:51:05,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:51:05,857 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:51:05,857 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:51:05,857 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [255851090] [2022-03-18 00:51:05,857 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [255851090] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:51:05,857 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:51:05,857 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-18 00:51:11,388 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:51:11,389 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1500779478] [2022-03-18 00:51:11,389 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1500779478] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:51:11,389 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:51:11,389 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [80] imperfect sequences [] total 80 [2022-03-18 00:51:11,389 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [652826555] [2022-03-18 00:51:11,389 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:51:11,389 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 80 states [2022-03-18 00:51:11,389 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:51:11,390 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2022-03-18 00:51:11,390 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=6163, Unknown=0, NotChecked=0, Total=6320 [2022-03-18 00:51:11,390 INFO L87 Difference]: Start difference. First operand 241 states and 242 transitions. Second operand has 80 states, 80 states have (on average 2.9375) internal successors, (235), 79 states have internal predecessors, (235), 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) [2022-03-18 00:51:18,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:51:18,551 INFO L93 Difference]: Finished difference Result 253 states and 257 transitions. [2022-03-18 00:51:18,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2022-03-18 00:51:18,551 INFO L78 Accepts]: Start accepts. Automaton has has 80 states, 80 states have (on average 2.9375) internal successors, (235), 79 states have internal predecessors, (235), 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 239 [2022-03-18 00:51:18,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:51:18,552 INFO L225 Difference]: With dead ends: 253 [2022-03-18 00:51:18,552 INFO L226 Difference]: Without dead ends: 245 [2022-03-18 00:51:18,553 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 316 GetRequests, 8 SyntacticMatches, 153 SemanticMatches, 155 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2926 ImplicationChecksByTransitivity, 7.4s TimeCoverageRelationStatistics Valid=465, Invalid=24027, Unknown=0, NotChecked=0, Total=24492 [2022-03-18 00:51:18,553 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 165 mSDsluCounter, 387 mSDsCounter, 0 mSdLazyCounter, 18327 mSolverCounterSat, 80 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 165 SdHoareTripleChecker+Valid, 399 SdHoareTripleChecker+Invalid, 18407 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 80 IncrementalHoareTripleChecker+Valid, 18327 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.9s IncrementalHoareTripleChecker+Time [2022-03-18 00:51:18,553 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [165 Valid, 399 Invalid, 18407 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [80 Valid, 18327 Invalid, 0 Unknown, 0 Unchecked, 4.9s Time] [2022-03-18 00:51:18,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 245 states. [2022-03-18 00:51:18,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 245 to 244. [2022-03-18 00:51:18,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 244 states, 239 states have (on average 1.00836820083682) internal successors, (241), 239 states have internal predecessors, (241), 3 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) [2022-03-18 00:51:18,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 244 states to 244 states and 245 transitions. [2022-03-18 00:51:18,595 INFO L78 Accepts]: Start accepts. Automaton has 244 states and 245 transitions. Word has length 239 [2022-03-18 00:51:18,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:51:18,596 INFO L478 AbstractCegarLoop]: Abstraction has 244 states and 245 transitions. [2022-03-18 00:51:18,596 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 80 states, 80 states have (on average 2.9375) internal successors, (235), 79 states have internal predecessors, (235), 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) [2022-03-18 00:51:18,596 INFO L276 IsEmpty]: Start isEmpty. Operand 244 states and 245 transitions. [2022-03-18 00:51:18,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 243 [2022-03-18 00:51:18,596 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:51:18,597 INFO L500 BasicCegarLoop]: trace histogram [77, 77, 77, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:51:18,597 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2022-03-18 00:51:18,597 INFO L403 AbstractCegarLoop]: === Iteration 79 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:51:18,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:51:18,597 INFO L85 PathProgramCache]: Analyzing trace with hash -1731763317, now seen corresponding path program 77 times [2022-03-18 00:51:18,597 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:51:18,597 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1329197316] [2022-03-18 00:51:18,733 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-18 00:51:18,734 INFO L85 PathProgramCache]: Analyzing trace with hash -1012114608, now seen corresponding path program 1 times [2022-03-18 00:51:18,734 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:51:18,734 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [252620346] [2022-03-18 00:51:18,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:51:18,734 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:51:18,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:51:18,752 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:51:18,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:51:18,755 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:51:18,755 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:51:18,755 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [252620346] [2022-03-18 00:51:18,755 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [252620346] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:51:18,755 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:51:18,755 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-18 00:51:24,437 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:51:24,437 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1329197316] [2022-03-18 00:51:24,437 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1329197316] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:51:24,437 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:51:24,437 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [81] imperfect sequences [] total 81 [2022-03-18 00:51:24,437 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2000508133] [2022-03-18 00:51:24,437 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:51:24,440 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 81 states [2022-03-18 00:51:24,440 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:51:24,440 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 81 interpolants. [2022-03-18 00:51:24,441 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=159, Invalid=6321, Unknown=0, NotChecked=0, Total=6480 [2022-03-18 00:51:24,441 INFO L87 Difference]: Start difference. First operand 244 states and 245 transitions. Second operand has 81 states, 81 states have (on average 2.9382716049382718) internal successors, (238), 80 states have internal predecessors, (238), 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) [2022-03-18 00:51:31,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:51:31,684 INFO L93 Difference]: Finished difference Result 256 states and 260 transitions. [2022-03-18 00:51:31,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2022-03-18 00:51:31,685 INFO L78 Accepts]: Start accepts. Automaton has has 81 states, 81 states have (on average 2.9382716049382718) internal successors, (238), 80 states have internal predecessors, (238), 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 242 [2022-03-18 00:51:31,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:51:31,686 INFO L225 Difference]: With dead ends: 256 [2022-03-18 00:51:31,686 INFO L226 Difference]: Without dead ends: 248 [2022-03-18 00:51:31,687 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 320 GetRequests, 8 SyntacticMatches, 155 SemanticMatches, 157 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3003 ImplicationChecksByTransitivity, 7.6s TimeCoverageRelationStatistics Valid=471, Invalid=24651, Unknown=0, NotChecked=0, Total=25122 [2022-03-18 00:51:31,687 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 167 mSDsluCounter, 392 mSDsCounter, 0 mSdLazyCounter, 18799 mSolverCounterSat, 81 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 167 SdHoareTripleChecker+Valid, 404 SdHoareTripleChecker+Invalid, 18880 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 81 IncrementalHoareTripleChecker+Valid, 18799 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.0s IncrementalHoareTripleChecker+Time [2022-03-18 00:51:31,687 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [167 Valid, 404 Invalid, 18880 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [81 Valid, 18799 Invalid, 0 Unknown, 0 Unchecked, 5.0s Time] [2022-03-18 00:51:31,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2022-03-18 00:51:31,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 247. [2022-03-18 00:51:31,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 247 states, 242 states have (on average 1.0082644628099173) internal successors, (244), 242 states have internal predecessors, (244), 3 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) [2022-03-18 00:51:31,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 247 states to 247 states and 248 transitions. [2022-03-18 00:51:31,729 INFO L78 Accepts]: Start accepts. Automaton has 247 states and 248 transitions. Word has length 242 [2022-03-18 00:51:31,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:51:31,729 INFO L478 AbstractCegarLoop]: Abstraction has 247 states and 248 transitions. [2022-03-18 00:51:31,730 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 81 states, 81 states have (on average 2.9382716049382718) internal successors, (238), 80 states have internal predecessors, (238), 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) [2022-03-18 00:51:31,730 INFO L276 IsEmpty]: Start isEmpty. Operand 247 states and 248 transitions. [2022-03-18 00:51:31,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 246 [2022-03-18 00:51:31,730 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:51:31,730 INFO L500 BasicCegarLoop]: trace histogram [78, 78, 78, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:51:31,730 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2022-03-18 00:51:31,730 INFO L403 AbstractCegarLoop]: === Iteration 80 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:51:31,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:51:31,731 INFO L85 PathProgramCache]: Analyzing trace with hash -1523990845, now seen corresponding path program 78 times [2022-03-18 00:51:31,731 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:51:31,731 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1529807383] [2022-03-18 00:51:31,864 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-18 00:51:31,864 INFO L85 PathProgramCache]: Analyzing trace with hash -953009264, now seen corresponding path program 1 times [2022-03-18 00:51:31,864 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:51:31,864 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [513531758] [2022-03-18 00:51:31,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:51:31,865 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:51:31,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:51:31,914 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:51:31,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:51:31,916 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:51:31,916 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:51:31,916 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [513531758] [2022-03-18 00:51:31,916 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [513531758] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:51:31,916 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:51:31,916 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-18 00:51:37,686 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:51:37,686 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1529807383] [2022-03-18 00:51:37,686 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1529807383] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:51:37,686 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:51:37,687 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [82] imperfect sequences [] total 82 [2022-03-18 00:51:37,687 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [678914929] [2022-03-18 00:51:37,687 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:51:37,687 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 82 states [2022-03-18 00:51:37,687 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:51:37,687 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2022-03-18 00:51:37,688 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=161, Invalid=6481, Unknown=0, NotChecked=0, Total=6642 [2022-03-18 00:51:37,688 INFO L87 Difference]: Start difference. First operand 247 states and 248 transitions. Second operand has 82 states, 82 states have (on average 2.9390243902439024) internal successors, (241), 81 states have internal predecessors, (241), 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) [2022-03-18 00:51:45,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:51:45,207 INFO L93 Difference]: Finished difference Result 259 states and 263 transitions. [2022-03-18 00:51:45,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2022-03-18 00:51:45,208 INFO L78 Accepts]: Start accepts. Automaton has has 82 states, 82 states have (on average 2.9390243902439024) internal successors, (241), 81 states have internal predecessors, (241), 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 245 [2022-03-18 00:51:45,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:51:45,209 INFO L225 Difference]: With dead ends: 259 [2022-03-18 00:51:45,209 INFO L226 Difference]: Without dead ends: 251 [2022-03-18 00:51:45,210 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 324 GetRequests, 8 SyntacticMatches, 157 SemanticMatches, 159 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3081 ImplicationChecksByTransitivity, 7.8s TimeCoverageRelationStatistics Valid=477, Invalid=25283, Unknown=0, NotChecked=0, Total=25760 [2022-03-18 00:51:45,210 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 169 mSDsluCounter, 397 mSDsCounter, 0 mSdLazyCounter, 19277 mSolverCounterSat, 82 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 169 SdHoareTripleChecker+Valid, 409 SdHoareTripleChecker+Invalid, 19359 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 82 IncrementalHoareTripleChecker+Valid, 19277 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.2s IncrementalHoareTripleChecker+Time [2022-03-18 00:51:45,210 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [169 Valid, 409 Invalid, 19359 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [82 Valid, 19277 Invalid, 0 Unknown, 0 Unchecked, 5.2s Time] [2022-03-18 00:51:45,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 251 states. [2022-03-18 00:51:45,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 251 to 250. [2022-03-18 00:51:45,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 250 states, 245 states have (on average 1.0081632653061225) internal successors, (247), 245 states have internal predecessors, (247), 3 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) [2022-03-18 00:51:45,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 250 states to 250 states and 251 transitions. [2022-03-18 00:51:45,259 INFO L78 Accepts]: Start accepts. Automaton has 250 states and 251 transitions. Word has length 245 [2022-03-18 00:51:45,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:51:45,259 INFO L478 AbstractCegarLoop]: Abstraction has 250 states and 251 transitions. [2022-03-18 00:51:45,259 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 82 states, 82 states have (on average 2.9390243902439024) internal successors, (241), 81 states have internal predecessors, (241), 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) [2022-03-18 00:51:45,259 INFO L276 IsEmpty]: Start isEmpty. Operand 250 states and 251 transitions. [2022-03-18 00:51:45,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 249 [2022-03-18 00:51:45,260 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:51:45,260 INFO L500 BasicCegarLoop]: trace histogram [79, 79, 79, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:51:45,260 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2022-03-18 00:51:45,260 INFO L403 AbstractCegarLoop]: === Iteration 81 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:51:45,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:51:45,261 INFO L85 PathProgramCache]: Analyzing trace with hash -822151029, now seen corresponding path program 79 times [2022-03-18 00:51:45,261 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:51:45,261 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [556231070] [2022-03-18 00:51:45,390 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-18 00:51:45,390 INFO L85 PathProgramCache]: Analyzing trace with hash -893903920, now seen corresponding path program 1 times [2022-03-18 00:51:45,390 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:51:45,390 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [603197784] [2022-03-18 00:51:45,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:51:45,390 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:51:45,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:51:45,410 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:51:45,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:51:45,412 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:51:45,412 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:51:45,412 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [603197784] [2022-03-18 00:51:45,412 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [603197784] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:51:45,412 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:51:45,412 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-18 00:51:51,300 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:51:51,300 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [556231070] [2022-03-18 00:51:51,300 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [556231070] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:51:51,300 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:51:51,300 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [83] imperfect sequences [] total 83 [2022-03-18 00:51:51,300 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1456861584] [2022-03-18 00:51:51,300 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:51:51,301 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 83 states [2022-03-18 00:51:51,301 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:51:51,301 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2022-03-18 00:51:51,301 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=163, Invalid=6643, Unknown=0, NotChecked=0, Total=6806 [2022-03-18 00:51:51,302 INFO L87 Difference]: Start difference. First operand 250 states and 251 transitions. Second operand has 83 states, 83 states have (on average 2.9397590361445785) internal successors, (244), 82 states have internal predecessors, (244), 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) [2022-03-18 00:51:59,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:51:59,037 INFO L93 Difference]: Finished difference Result 262 states and 266 transitions. [2022-03-18 00:51:59,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2022-03-18 00:51:59,037 INFO L78 Accepts]: Start accepts. Automaton has has 83 states, 83 states have (on average 2.9397590361445785) internal successors, (244), 82 states have internal predecessors, (244), 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 248 [2022-03-18 00:51:59,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:51:59,038 INFO L225 Difference]: With dead ends: 262 [2022-03-18 00:51:59,038 INFO L226 Difference]: Without dead ends: 254 [2022-03-18 00:51:59,039 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 328 GetRequests, 8 SyntacticMatches, 159 SemanticMatches, 161 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3160 ImplicationChecksByTransitivity, 8.0s TimeCoverageRelationStatistics Valid=483, Invalid=25923, Unknown=0, NotChecked=0, Total=26406 [2022-03-18 00:51:59,039 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 171 mSDsluCounter, 402 mSDsCounter, 0 mSdLazyCounter, 19761 mSolverCounterSat, 83 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 171 SdHoareTripleChecker+Valid, 414 SdHoareTripleChecker+Invalid, 19844 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 83 IncrementalHoareTripleChecker+Valid, 19761 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.3s IncrementalHoareTripleChecker+Time [2022-03-18 00:51:59,039 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [171 Valid, 414 Invalid, 19844 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [83 Valid, 19761 Invalid, 0 Unknown, 0 Unchecked, 5.3s Time] [2022-03-18 00:51:59,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254 states. [2022-03-18 00:51:59,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254 to 253. [2022-03-18 00:51:59,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 253 states, 248 states have (on average 1.0080645161290323) internal successors, (250), 248 states have internal predecessors, (250), 3 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) [2022-03-18 00:51:59,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 253 states to 253 states and 254 transitions. [2022-03-18 00:51:59,091 INFO L78 Accepts]: Start accepts. Automaton has 253 states and 254 transitions. Word has length 248 [2022-03-18 00:51:59,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:51:59,091 INFO L478 AbstractCegarLoop]: Abstraction has 253 states and 254 transitions. [2022-03-18 00:51:59,091 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 83 states, 83 states have (on average 2.9397590361445785) internal successors, (244), 82 states have internal predecessors, (244), 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) [2022-03-18 00:51:59,092 INFO L276 IsEmpty]: Start isEmpty. Operand 253 states and 254 transitions. [2022-03-18 00:51:59,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 252 [2022-03-18 00:51:59,092 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:51:59,092 INFO L500 BasicCegarLoop]: trace histogram [80, 80, 80, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:51:59,093 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2022-03-18 00:51:59,093 INFO L403 AbstractCegarLoop]: === Iteration 82 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:51:59,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:51:59,093 INFO L85 PathProgramCache]: Analyzing trace with hash -212989501, now seen corresponding path program 80 times [2022-03-18 00:51:59,093 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:51:59,093 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1822773885] [2022-03-18 00:51:59,181 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-18 00:51:59,182 INFO L85 PathProgramCache]: Analyzing trace with hash -834798576, now seen corresponding path program 1 times [2022-03-18 00:51:59,182 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:51:59,182 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [319267924] [2022-03-18 00:51:59,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:51:59,182 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:51:59,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:51:59,203 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:51:59,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:51:59,205 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:51:59,206 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:51:59,206 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [319267924] [2022-03-18 00:51:59,206 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [319267924] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:51:59,206 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:51:59,206 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-18 00:52:05,225 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:52:05,226 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1822773885] [2022-03-18 00:52:05,226 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1822773885] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:52:05,226 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:52:05,226 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [84] imperfect sequences [] total 84 [2022-03-18 00:52:05,226 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [990831629] [2022-03-18 00:52:05,226 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:52:05,227 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 84 states [2022-03-18 00:52:05,227 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:52:05,227 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2022-03-18 00:52:05,227 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=165, Invalid=6807, Unknown=0, NotChecked=0, Total=6972 [2022-03-18 00:52:05,228 INFO L87 Difference]: Start difference. First operand 253 states and 254 transitions. Second operand has 84 states, 84 states have (on average 2.9404761904761907) internal successors, (247), 83 states have internal predecessors, (247), 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) [2022-03-18 00:52:13,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:52:13,038 INFO L93 Difference]: Finished difference Result 265 states and 269 transitions. [2022-03-18 00:52:13,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2022-03-18 00:52:13,039 INFO L78 Accepts]: Start accepts. Automaton has has 84 states, 84 states have (on average 2.9404761904761907) internal successors, (247), 83 states have internal predecessors, (247), 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 251 [2022-03-18 00:52:13,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:52:13,040 INFO L225 Difference]: With dead ends: 265 [2022-03-18 00:52:13,040 INFO L226 Difference]: Without dead ends: 257 [2022-03-18 00:52:13,041 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 332 GetRequests, 8 SyntacticMatches, 161 SemanticMatches, 163 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3240 ImplicationChecksByTransitivity, 8.2s TimeCoverageRelationStatistics Valid=489, Invalid=26571, Unknown=0, NotChecked=0, Total=27060 [2022-03-18 00:52:13,041 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 173 mSDsluCounter, 407 mSDsCounter, 0 mSdLazyCounter, 20251 mSolverCounterSat, 84 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 173 SdHoareTripleChecker+Valid, 419 SdHoareTripleChecker+Invalid, 20335 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 84 IncrementalHoareTripleChecker+Valid, 20251 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.3s IncrementalHoareTripleChecker+Time [2022-03-18 00:52:13,041 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [173 Valid, 419 Invalid, 20335 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [84 Valid, 20251 Invalid, 0 Unknown, 0 Unchecked, 5.3s Time] [2022-03-18 00:52:13,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 257 states. [2022-03-18 00:52:13,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 257 to 256. [2022-03-18 00:52:13,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 256 states, 251 states have (on average 1.0079681274900398) internal successors, (253), 251 states have internal predecessors, (253), 3 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) [2022-03-18 00:52:13,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 256 states to 256 states and 257 transitions. [2022-03-18 00:52:13,088 INFO L78 Accepts]: Start accepts. Automaton has 256 states and 257 transitions. Word has length 251 [2022-03-18 00:52:13,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:52:13,088 INFO L478 AbstractCegarLoop]: Abstraction has 256 states and 257 transitions. [2022-03-18 00:52:13,088 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 84 states, 84 states have (on average 2.9404761904761907) internal successors, (247), 83 states have internal predecessors, (247), 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) [2022-03-18 00:52:13,088 INFO L276 IsEmpty]: Start isEmpty. Operand 256 states and 257 transitions. [2022-03-18 00:52:13,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 255 [2022-03-18 00:52:13,089 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:52:13,089 INFO L500 BasicCegarLoop]: trace histogram [81, 81, 81, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:52:13,089 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2022-03-18 00:52:13,089 INFO L403 AbstractCegarLoop]: === Iteration 83 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:52:13,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:52:13,089 INFO L85 PathProgramCache]: Analyzing trace with hash 1081265547, now seen corresponding path program 81 times [2022-03-18 00:52:13,089 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:52:13,089 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1987543045] [2022-03-18 00:52:13,215 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-18 00:52:13,215 INFO L85 PathProgramCache]: Analyzing trace with hash -775693232, now seen corresponding path program 1 times [2022-03-18 00:52:13,215 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:52:13,215 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1218930246] [2022-03-18 00:52:13,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:52:13,215 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:52:13,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:52:13,233 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:52:13,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:52:13,236 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:52:13,236 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:52:13,236 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1218930246] [2022-03-18 00:52:13,236 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1218930246] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:52:13,236 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:52:13,237 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-18 00:52:19,378 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:52:19,378 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1987543045] [2022-03-18 00:52:19,378 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1987543045] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:52:19,378 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:52:19,378 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [85] imperfect sequences [] total 85 [2022-03-18 00:52:19,378 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1132161466] [2022-03-18 00:52:19,378 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:52:19,378 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 85 states [2022-03-18 00:52:19,378 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:52:19,379 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 85 interpolants. [2022-03-18 00:52:19,379 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=167, Invalid=6973, Unknown=0, NotChecked=0, Total=7140 [2022-03-18 00:52:19,379 INFO L87 Difference]: Start difference. First operand 256 states and 257 transitions. Second operand has 85 states, 85 states have (on average 2.9411764705882355) internal successors, (250), 84 states have internal predecessors, (250), 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) [2022-03-18 00:52:27,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:52:27,379 INFO L93 Difference]: Finished difference Result 268 states and 272 transitions. [2022-03-18 00:52:27,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2022-03-18 00:52:27,379 INFO L78 Accepts]: Start accepts. Automaton has has 85 states, 85 states have (on average 2.9411764705882355) internal successors, (250), 84 states have internal predecessors, (250), 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 254 [2022-03-18 00:52:27,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:52:27,380 INFO L225 Difference]: With dead ends: 268 [2022-03-18 00:52:27,380 INFO L226 Difference]: Without dead ends: 260 [2022-03-18 00:52:27,381 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 336 GetRequests, 8 SyntacticMatches, 163 SemanticMatches, 165 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3321 ImplicationChecksByTransitivity, 8.3s TimeCoverageRelationStatistics Valid=495, Invalid=27227, Unknown=0, NotChecked=0, Total=27722 [2022-03-18 00:52:27,381 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 175 mSDsluCounter, 412 mSDsCounter, 0 mSdLazyCounter, 20747 mSolverCounterSat, 85 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 175 SdHoareTripleChecker+Valid, 424 SdHoareTripleChecker+Invalid, 20832 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 85 IncrementalHoareTripleChecker+Valid, 20747 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.5s IncrementalHoareTripleChecker+Time [2022-03-18 00:52:27,381 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [175 Valid, 424 Invalid, 20832 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [85 Valid, 20747 Invalid, 0 Unknown, 0 Unchecked, 5.5s Time] [2022-03-18 00:52:27,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2022-03-18 00:52:27,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 259. [2022-03-18 00:52:27,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 259 states, 254 states have (on average 1.0078740157480315) internal successors, (256), 254 states have internal predecessors, (256), 3 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) [2022-03-18 00:52:27,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 259 states to 259 states and 260 transitions. [2022-03-18 00:52:27,428 INFO L78 Accepts]: Start accepts. Automaton has 259 states and 260 transitions. Word has length 254 [2022-03-18 00:52:27,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:52:27,429 INFO L478 AbstractCegarLoop]: Abstraction has 259 states and 260 transitions. [2022-03-18 00:52:27,429 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 85 states, 85 states have (on average 2.9411764705882355) internal successors, (250), 84 states have internal predecessors, (250), 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) [2022-03-18 00:52:27,429 INFO L276 IsEmpty]: Start isEmpty. Operand 259 states and 260 transitions. [2022-03-18 00:52:27,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 258 [2022-03-18 00:52:27,430 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:52:27,430 INFO L500 BasicCegarLoop]: trace histogram [82, 82, 82, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:52:27,430 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2022-03-18 00:52:27,430 INFO L403 AbstractCegarLoop]: === Iteration 84 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:52:27,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:52:27,430 INFO L85 PathProgramCache]: Analyzing trace with hash -1982982973, now seen corresponding path program 82 times [2022-03-18 00:52:27,430 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:52:27,430 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [651840288] [2022-03-18 00:52:27,558 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-18 00:52:27,558 INFO L85 PathProgramCache]: Analyzing trace with hash -716587888, now seen corresponding path program 1 times [2022-03-18 00:52:27,558 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:52:27,558 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [13608417] [2022-03-18 00:52:27,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:52:27,559 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:52:27,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:52:27,578 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:52:27,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:52:27,580 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:52:27,580 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:52:27,580 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [13608417] [2022-03-18 00:52:27,580 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [13608417] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:52:27,580 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:52:27,580 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-18 00:52:33,993 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:52:33,993 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [651840288] [2022-03-18 00:52:33,993 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [651840288] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:52:33,993 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:52:33,993 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [86] imperfect sequences [] total 86 [2022-03-18 00:52:33,993 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [130908495] [2022-03-18 00:52:33,993 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:52:33,994 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 86 states [2022-03-18 00:52:33,994 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:52:33,994 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2022-03-18 00:52:33,994 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=169, Invalid=7141, Unknown=0, NotChecked=0, Total=7310 [2022-03-18 00:52:33,995 INFO L87 Difference]: Start difference. First operand 259 states and 260 transitions. Second operand has 86 states, 86 states have (on average 2.941860465116279) internal successors, (253), 85 states have internal predecessors, (253), 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) [2022-03-18 00:52:42,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:52:42,232 INFO L93 Difference]: Finished difference Result 271 states and 275 transitions. [2022-03-18 00:52:42,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2022-03-18 00:52:42,233 INFO L78 Accepts]: Start accepts. Automaton has has 86 states, 86 states have (on average 2.941860465116279) internal successors, (253), 85 states have internal predecessors, (253), 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 257 [2022-03-18 00:52:42,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:52:42,234 INFO L225 Difference]: With dead ends: 271 [2022-03-18 00:52:42,234 INFO L226 Difference]: Without dead ends: 263 [2022-03-18 00:52:42,235 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 340 GetRequests, 8 SyntacticMatches, 165 SemanticMatches, 167 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3403 ImplicationChecksByTransitivity, 8.6s TimeCoverageRelationStatistics Valid=501, Invalid=27891, Unknown=0, NotChecked=0, Total=28392 [2022-03-18 00:52:42,235 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 177 mSDsluCounter, 417 mSDsCounter, 0 mSdLazyCounter, 21249 mSolverCounterSat, 86 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 177 SdHoareTripleChecker+Valid, 429 SdHoareTripleChecker+Invalid, 21335 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 86 IncrementalHoareTripleChecker+Valid, 21249 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.7s IncrementalHoareTripleChecker+Time [2022-03-18 00:52:42,235 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [177 Valid, 429 Invalid, 21335 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [86 Valid, 21249 Invalid, 0 Unknown, 0 Unchecked, 5.7s Time] [2022-03-18 00:52:42,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 263 states. [2022-03-18 00:52:42,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 263 to 262. [2022-03-18 00:52:42,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 262 states, 257 states have (on average 1.0077821011673151) internal successors, (259), 257 states have internal predecessors, (259), 3 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) [2022-03-18 00:52:42,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 262 states to 262 states and 263 transitions. [2022-03-18 00:52:42,282 INFO L78 Accepts]: Start accepts. Automaton has 262 states and 263 transitions. Word has length 257 [2022-03-18 00:52:42,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:52:42,282 INFO L478 AbstractCegarLoop]: Abstraction has 262 states and 263 transitions. [2022-03-18 00:52:42,282 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 86 states, 86 states have (on average 2.941860465116279) internal successors, (253), 85 states have internal predecessors, (253), 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) [2022-03-18 00:52:42,282 INFO L276 IsEmpty]: Start isEmpty. Operand 262 states and 263 transitions. [2022-03-18 00:52:42,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 261 [2022-03-18 00:52:42,283 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:52:42,283 INFO L500 BasicCegarLoop]: trace histogram [83, 83, 83, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:52:42,283 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83 [2022-03-18 00:52:42,283 INFO L403 AbstractCegarLoop]: === Iteration 85 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:52:42,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:52:42,284 INFO L85 PathProgramCache]: Analyzing trace with hash 519234187, now seen corresponding path program 83 times [2022-03-18 00:52:42,284 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:52:42,284 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1318344452] [2022-03-18 00:52:42,433 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-18 00:52:42,434 INFO L85 PathProgramCache]: Analyzing trace with hash -657482544, now seen corresponding path program 1 times [2022-03-18 00:52:42,434 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:52:42,434 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [730015349] [2022-03-18 00:52:42,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:52:42,434 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:52:42,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:52:42,449 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:52:42,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:52:42,451 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:52:42,451 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:52:42,452 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [730015349] [2022-03-18 00:52:42,452 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [730015349] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:52:42,452 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:52:42,452 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-18 00:52:48,898 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:52:48,898 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1318344452] [2022-03-18 00:52:48,898 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1318344452] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:52:48,898 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:52:48,898 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [87] imperfect sequences [] total 87 [2022-03-18 00:52:48,898 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [740517247] [2022-03-18 00:52:48,898 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:52:48,899 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 87 states [2022-03-18 00:52:48,899 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:52:48,899 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 87 interpolants. [2022-03-18 00:52:48,899 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=7311, Unknown=0, NotChecked=0, Total=7482 [2022-03-18 00:52:48,899 INFO L87 Difference]: Start difference. First operand 262 states and 263 transitions. Second operand has 87 states, 87 states have (on average 2.942528735632184) internal successors, (256), 86 states have internal predecessors, (256), 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) [2022-03-18 00:52:57,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:52:57,284 INFO L93 Difference]: Finished difference Result 274 states and 278 transitions. [2022-03-18 00:52:57,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2022-03-18 00:52:57,284 INFO L78 Accepts]: Start accepts. Automaton has has 87 states, 87 states have (on average 2.942528735632184) internal successors, (256), 86 states have internal predecessors, (256), 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 260 [2022-03-18 00:52:57,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:52:57,285 INFO L225 Difference]: With dead ends: 274 [2022-03-18 00:52:57,286 INFO L226 Difference]: Without dead ends: 266 [2022-03-18 00:52:57,287 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 344 GetRequests, 8 SyntacticMatches, 167 SemanticMatches, 169 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3486 ImplicationChecksByTransitivity, 8.7s TimeCoverageRelationStatistics Valid=507, Invalid=28563, Unknown=0, NotChecked=0, Total=29070 [2022-03-18 00:52:57,287 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 179 mSDsluCounter, 422 mSDsCounter, 0 mSdLazyCounter, 21757 mSolverCounterSat, 87 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 179 SdHoareTripleChecker+Valid, 434 SdHoareTripleChecker+Invalid, 21844 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 87 IncrementalHoareTripleChecker+Valid, 21757 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.8s IncrementalHoareTripleChecker+Time [2022-03-18 00:52:57,288 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [179 Valid, 434 Invalid, 21844 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [87 Valid, 21757 Invalid, 0 Unknown, 0 Unchecked, 5.8s Time] [2022-03-18 00:52:57,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2022-03-18 00:52:57,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 265. [2022-03-18 00:52:57,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 265 states, 260 states have (on average 1.0076923076923077) internal successors, (262), 260 states have internal predecessors, (262), 3 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) [2022-03-18 00:52:57,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 265 states to 265 states and 266 transitions. [2022-03-18 00:52:57,354 INFO L78 Accepts]: Start accepts. Automaton has 265 states and 266 transitions. Word has length 260 [2022-03-18 00:52:57,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:52:57,354 INFO L478 AbstractCegarLoop]: Abstraction has 265 states and 266 transitions. [2022-03-18 00:52:57,355 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 87 states, 87 states have (on average 2.942528735632184) internal successors, (256), 86 states have internal predecessors, (256), 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) [2022-03-18 00:52:57,355 INFO L276 IsEmpty]: Start isEmpty. Operand 265 states and 266 transitions. [2022-03-18 00:52:57,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 264 [2022-03-18 00:52:57,355 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:52:57,356 INFO L500 BasicCegarLoop]: trace histogram [84, 84, 84, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:52:57,356 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84 [2022-03-18 00:52:57,356 INFO L403 AbstractCegarLoop]: === Iteration 86 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:52:57,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:52:57,356 INFO L85 PathProgramCache]: Analyzing trace with hash 618258371, now seen corresponding path program 84 times [2022-03-18 00:52:57,356 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:52:57,356 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1741542910] [2022-03-18 00:52:57,484 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-18 00:52:57,485 INFO L85 PathProgramCache]: Analyzing trace with hash -598377200, now seen corresponding path program 1 times [2022-03-18 00:52:57,485 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:52:57,486 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [449915213] [2022-03-18 00:52:57,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:52:57,486 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:52:57,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:52:57,505 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:52:57,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:52:57,512 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:52:57,512 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:52:57,512 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [449915213] [2022-03-18 00:52:57,512 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [449915213] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:52:57,513 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:52:57,513 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-18 00:53:04,116 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:53:04,116 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1741542910] [2022-03-18 00:53:04,116 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1741542910] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:53:04,116 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:53:04,117 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [88] imperfect sequences [] total 88 [2022-03-18 00:53:04,117 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2028638199] [2022-03-18 00:53:04,117 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:53:04,117 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 88 states [2022-03-18 00:53:04,117 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:53:04,117 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 88 interpolants. [2022-03-18 00:53:04,118 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=7483, Unknown=0, NotChecked=0, Total=7656 [2022-03-18 00:53:04,118 INFO L87 Difference]: Start difference. First operand 265 states and 266 transitions. Second operand has 88 states, 88 states have (on average 2.9431818181818183) internal successors, (259), 87 states have internal predecessors, (259), 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) [2022-03-18 00:53:13,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:53:13,226 INFO L93 Difference]: Finished difference Result 277 states and 281 transitions. [2022-03-18 00:53:13,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2022-03-18 00:53:13,226 INFO L78 Accepts]: Start accepts. Automaton has has 88 states, 88 states have (on average 2.9431818181818183) internal successors, (259), 87 states have internal predecessors, (259), 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 263 [2022-03-18 00:53:13,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:53:13,227 INFO L225 Difference]: With dead ends: 277 [2022-03-18 00:53:13,227 INFO L226 Difference]: Without dead ends: 269 [2022-03-18 00:53:13,228 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 348 GetRequests, 8 SyntacticMatches, 169 SemanticMatches, 171 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3570 ImplicationChecksByTransitivity, 9.1s TimeCoverageRelationStatistics Valid=513, Invalid=29243, Unknown=0, NotChecked=0, Total=29756 [2022-03-18 00:53:13,228 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 181 mSDsluCounter, 427 mSDsCounter, 0 mSdLazyCounter, 22271 mSolverCounterSat, 88 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 181 SdHoareTripleChecker+Valid, 439 SdHoareTripleChecker+Invalid, 22359 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 88 IncrementalHoareTripleChecker+Valid, 22271 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.3s IncrementalHoareTripleChecker+Time [2022-03-18 00:53:13,228 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [181 Valid, 439 Invalid, 22359 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [88 Valid, 22271 Invalid, 0 Unknown, 0 Unchecked, 6.3s Time] [2022-03-18 00:53:13,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 269 states. [2022-03-18 00:53:13,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 269 to 268. [2022-03-18 00:53:13,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 268 states, 263 states have (on average 1.0076045627376427) internal successors, (265), 263 states have internal predecessors, (265), 3 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) [2022-03-18 00:53:13,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 268 states to 268 states and 269 transitions. [2022-03-18 00:53:13,278 INFO L78 Accepts]: Start accepts. Automaton has 268 states and 269 transitions. Word has length 263 [2022-03-18 00:53:13,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:53:13,278 INFO L478 AbstractCegarLoop]: Abstraction has 268 states and 269 transitions. [2022-03-18 00:53:13,278 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 88 states, 88 states have (on average 2.9431818181818183) internal successors, (259), 87 states have internal predecessors, (259), 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) [2022-03-18 00:53:13,279 INFO L276 IsEmpty]: Start isEmpty. Operand 268 states and 269 transitions. [2022-03-18 00:53:13,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2022-03-18 00:53:13,279 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:53:13,279 INFO L500 BasicCegarLoop]: trace histogram [85, 85, 85, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:53:13,280 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85 [2022-03-18 00:53:13,280 INFO L403 AbstractCegarLoop]: === Iteration 87 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:53:13,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:53:13,280 INFO L85 PathProgramCache]: Analyzing trace with hash 5191563, now seen corresponding path program 85 times [2022-03-18 00:53:13,280 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:53:13,280 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [302371974] [2022-03-18 00:53:13,368 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-18 00:53:13,368 INFO L85 PathProgramCache]: Analyzing trace with hash -539271856, now seen corresponding path program 1 times [2022-03-18 00:53:13,369 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:53:13,369 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1632006550] [2022-03-18 00:53:13,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:53:13,369 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:53:13,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:53:13,387 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:53:13,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:53:13,389 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:53:13,389 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:53:13,389 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1632006550] [2022-03-18 00:53:13,389 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1632006550] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:53:13,389 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:53:13,389 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-18 00:53:20,117 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:53:20,117 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [302371974] [2022-03-18 00:53:20,117 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [302371974] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:53:20,117 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:53:20,117 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [89] imperfect sequences [] total 89 [2022-03-18 00:53:20,117 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1797960807] [2022-03-18 00:53:20,117 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:53:20,118 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 89 states [2022-03-18 00:53:20,118 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:53:20,118 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 89 interpolants. [2022-03-18 00:53:20,118 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=175, Invalid=7657, Unknown=0, NotChecked=0, Total=7832 [2022-03-18 00:53:20,119 INFO L87 Difference]: Start difference. First operand 268 states and 269 transitions. Second operand has 89 states, 89 states have (on average 2.943820224719101) internal successors, (262), 88 states have internal predecessors, (262), 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) [2022-03-18 00:53:28,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:53:28,887 INFO L93 Difference]: Finished difference Result 280 states and 284 transitions. [2022-03-18 00:53:28,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2022-03-18 00:53:28,887 INFO L78 Accepts]: Start accepts. Automaton has has 89 states, 89 states have (on average 2.943820224719101) internal successors, (262), 88 states have internal predecessors, (262), 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 266 [2022-03-18 00:53:28,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:53:28,888 INFO L225 Difference]: With dead ends: 280 [2022-03-18 00:53:28,888 INFO L226 Difference]: Without dead ends: 272 [2022-03-18 00:53:28,889 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 352 GetRequests, 8 SyntacticMatches, 171 SemanticMatches, 173 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3655 ImplicationChecksByTransitivity, 9.1s TimeCoverageRelationStatistics Valid=519, Invalid=29931, Unknown=0, NotChecked=0, Total=30450 [2022-03-18 00:53:28,890 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 183 mSDsluCounter, 432 mSDsCounter, 0 mSdLazyCounter, 22791 mSolverCounterSat, 89 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 183 SdHoareTripleChecker+Valid, 444 SdHoareTripleChecker+Invalid, 22880 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 89 IncrementalHoareTripleChecker+Valid, 22791 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.0s IncrementalHoareTripleChecker+Time [2022-03-18 00:53:28,890 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [183 Valid, 444 Invalid, 22880 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [89 Valid, 22791 Invalid, 0 Unknown, 0 Unchecked, 6.0s Time] [2022-03-18 00:53:28,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 272 states. [2022-03-18 00:53:28,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 272 to 271. [2022-03-18 00:53:28,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 271 states, 266 states have (on average 1.0075187969924813) internal successors, (268), 266 states have internal predecessors, (268), 3 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) [2022-03-18 00:53:28,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 271 states to 271 states and 272 transitions. [2022-03-18 00:53:28,942 INFO L78 Accepts]: Start accepts. Automaton has 271 states and 272 transitions. Word has length 266 [2022-03-18 00:53:28,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:53:28,942 INFO L478 AbstractCegarLoop]: Abstraction has 271 states and 272 transitions. [2022-03-18 00:53:28,942 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 89 states, 89 states have (on average 2.943820224719101) internal successors, (262), 88 states have internal predecessors, (262), 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) [2022-03-18 00:53:28,942 INFO L276 IsEmpty]: Start isEmpty. Operand 271 states and 272 transitions. [2022-03-18 00:53:28,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 270 [2022-03-18 00:53:28,943 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:53:28,943 INFO L500 BasicCegarLoop]: trace histogram [86, 86, 86, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:53:28,943 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86 [2022-03-18 00:53:28,943 INFO L403 AbstractCegarLoop]: === Iteration 88 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:53:28,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:53:28,944 INFO L85 PathProgramCache]: Analyzing trace with hash -1667142973, now seen corresponding path program 86 times [2022-03-18 00:53:28,944 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:53:28,944 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1053185377] [2022-03-18 00:53:29,068 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-18 00:53:29,068 INFO L85 PathProgramCache]: Analyzing trace with hash -480166512, now seen corresponding path program 1 times [2022-03-18 00:53:29,068 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:53:29,068 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1385073807] [2022-03-18 00:53:29,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:53:29,068 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:53:29,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:53:29,095 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:53:29,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:53:29,097 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:53:29,097 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:53:29,097 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1385073807] [2022-03-18 00:53:29,097 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1385073807] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:53:29,097 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:53:29,097 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-18 00:53:35,964 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:53:35,965 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1053185377] [2022-03-18 00:53:35,965 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1053185377] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:53:35,965 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:53:35,965 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [90] imperfect sequences [] total 90 [2022-03-18 00:53:35,965 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1187496770] [2022-03-18 00:53:35,965 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:53:35,965 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 90 states [2022-03-18 00:53:35,965 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:53:35,966 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 90 interpolants. [2022-03-18 00:53:35,966 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=177, Invalid=7833, Unknown=0, NotChecked=0, Total=8010 [2022-03-18 00:53:35,966 INFO L87 Difference]: Start difference. First operand 271 states and 272 transitions. Second operand has 90 states, 90 states have (on average 2.9444444444444446) internal successors, (265), 89 states have internal predecessors, (265), 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) [2022-03-18 00:53:45,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:53:45,031 INFO L93 Difference]: Finished difference Result 283 states and 287 transitions. [2022-03-18 00:53:45,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2022-03-18 00:53:45,031 INFO L78 Accepts]: Start accepts. Automaton has has 90 states, 90 states have (on average 2.9444444444444446) internal successors, (265), 89 states have internal predecessors, (265), 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 269 [2022-03-18 00:53:45,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:53:45,032 INFO L225 Difference]: With dead ends: 283 [2022-03-18 00:53:45,032 INFO L226 Difference]: Without dead ends: 275 [2022-03-18 00:53:45,033 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 356 GetRequests, 8 SyntacticMatches, 173 SemanticMatches, 175 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3741 ImplicationChecksByTransitivity, 9.3s TimeCoverageRelationStatistics Valid=525, Invalid=30627, Unknown=0, NotChecked=0, Total=31152 [2022-03-18 00:53:45,033 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 185 mSDsluCounter, 437 mSDsCounter, 0 mSdLazyCounter, 23317 mSolverCounterSat, 90 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 185 SdHoareTripleChecker+Valid, 449 SdHoareTripleChecker+Invalid, 23407 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 90 IncrementalHoareTripleChecker+Valid, 23317 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.2s IncrementalHoareTripleChecker+Time [2022-03-18 00:53:45,033 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [185 Valid, 449 Invalid, 23407 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [90 Valid, 23317 Invalid, 0 Unknown, 0 Unchecked, 6.2s Time] [2022-03-18 00:53:45,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 275 states. [2022-03-18 00:53:45,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 275 to 274. [2022-03-18 00:53:45,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 274 states, 269 states have (on average 1.0074349442379182) internal successors, (271), 269 states have internal predecessors, (271), 3 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) [2022-03-18 00:53:45,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 274 states to 274 states and 275 transitions. [2022-03-18 00:53:45,096 INFO L78 Accepts]: Start accepts. Automaton has 274 states and 275 transitions. Word has length 269 [2022-03-18 00:53:45,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:53:45,096 INFO L478 AbstractCegarLoop]: Abstraction has 274 states and 275 transitions. [2022-03-18 00:53:45,096 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 90 states, 90 states have (on average 2.9444444444444446) internal successors, (265), 89 states have internal predecessors, (265), 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) [2022-03-18 00:53:45,096 INFO L276 IsEmpty]: Start isEmpty. Operand 274 states and 275 transitions. [2022-03-18 00:53:45,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 273 [2022-03-18 00:53:45,097 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:53:45,097 INFO L500 BasicCegarLoop]: trace histogram [87, 87, 87, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:53:45,097 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87 [2022-03-18 00:53:45,097 INFO L403 AbstractCegarLoop]: === Iteration 89 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:53:45,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:53:45,097 INFO L85 PathProgramCache]: Analyzing trace with hash -564671349, now seen corresponding path program 87 times [2022-03-18 00:53:45,097 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:53:45,097 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2052220047] [2022-03-18 00:53:45,217 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-18 00:53:45,217 INFO L85 PathProgramCache]: Analyzing trace with hash -421061168, now seen corresponding path program 1 times [2022-03-18 00:53:45,217 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:53:45,217 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [312950699] [2022-03-18 00:53:45,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:53:45,218 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:53:45,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:53:45,234 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:53:45,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:53:45,235 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:53:45,236 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:53:45,236 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [312950699] [2022-03-18 00:53:45,236 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [312950699] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:53:45,236 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:53:45,236 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-18 00:53:52,240 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:53:52,240 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2052220047] [2022-03-18 00:53:52,240 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2052220047] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:53:52,240 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:53:52,240 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [91] imperfect sequences [] total 91 [2022-03-18 00:53:52,240 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [230253262] [2022-03-18 00:53:52,240 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:53:52,241 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 91 states [2022-03-18 00:53:52,241 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:53:52,241 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 91 interpolants. [2022-03-18 00:53:52,241 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=179, Invalid=8011, Unknown=0, NotChecked=0, Total=8190 [2022-03-18 00:53:52,241 INFO L87 Difference]: Start difference. First operand 274 states and 275 transitions. Second operand has 91 states, 91 states have (on average 2.9450549450549453) internal successors, (268), 90 states have internal predecessors, (268), 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) [2022-03-18 00:54:01,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:54:01,505 INFO L93 Difference]: Finished difference Result 286 states and 290 transitions. [2022-03-18 00:54:01,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2022-03-18 00:54:01,506 INFO L78 Accepts]: Start accepts. Automaton has has 91 states, 91 states have (on average 2.9450549450549453) internal successors, (268), 90 states have internal predecessors, (268), 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 272 [2022-03-18 00:54:01,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:54:01,507 INFO L225 Difference]: With dead ends: 286 [2022-03-18 00:54:01,507 INFO L226 Difference]: Without dead ends: 278 [2022-03-18 00:54:01,508 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 360 GetRequests, 8 SyntacticMatches, 175 SemanticMatches, 177 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3828 ImplicationChecksByTransitivity, 9.5s TimeCoverageRelationStatistics Valid=531, Invalid=31331, Unknown=0, NotChecked=0, Total=31862 [2022-03-18 00:54:01,508 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 187 mSDsluCounter, 442 mSDsCounter, 0 mSdLazyCounter, 23849 mSolverCounterSat, 91 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 187 SdHoareTripleChecker+Valid, 454 SdHoareTripleChecker+Invalid, 23940 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 91 IncrementalHoareTripleChecker+Valid, 23849 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.4s IncrementalHoareTripleChecker+Time [2022-03-18 00:54:01,508 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [187 Valid, 454 Invalid, 23940 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [91 Valid, 23849 Invalid, 0 Unknown, 0 Unchecked, 6.4s Time] [2022-03-18 00:54:01,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 278 states. [2022-03-18 00:54:01,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 278 to 277. [2022-03-18 00:54:01,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 277 states, 272 states have (on average 1.0073529411764706) internal successors, (274), 272 states have internal predecessors, (274), 3 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) [2022-03-18 00:54:01,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 277 states to 277 states and 278 transitions. [2022-03-18 00:54:01,562 INFO L78 Accepts]: Start accepts. Automaton has 277 states and 278 transitions. Word has length 272 [2022-03-18 00:54:01,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:54:01,563 INFO L478 AbstractCegarLoop]: Abstraction has 277 states and 278 transitions. [2022-03-18 00:54:01,563 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 91 states, 91 states have (on average 2.9450549450549453) internal successors, (268), 90 states have internal predecessors, (268), 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) [2022-03-18 00:54:01,563 INFO L276 IsEmpty]: Start isEmpty. Operand 277 states and 278 transitions. [2022-03-18 00:54:01,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 276 [2022-03-18 00:54:01,564 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:54:01,564 INFO L500 BasicCegarLoop]: trace histogram [88, 88, 88, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:54:01,564 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88 [2022-03-18 00:54:01,564 INFO L403 AbstractCegarLoop]: === Iteration 90 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:54:01,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:54:01,564 INFO L85 PathProgramCache]: Analyzing trace with hash -447433277, now seen corresponding path program 88 times [2022-03-18 00:54:01,564 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:54:01,564 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1051975501] [2022-03-18 00:54:01,700 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-18 00:54:01,700 INFO L85 PathProgramCache]: Analyzing trace with hash -361955824, now seen corresponding path program 1 times [2022-03-18 00:54:01,700 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:54:01,700 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [662325942] [2022-03-18 00:54:01,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:54:01,701 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:54:01,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:54:01,728 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:54:01,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:54:01,730 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:54:01,730 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:54:01,730 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [662325942] [2022-03-18 00:54:01,730 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [662325942] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:54:01,730 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:54:01,730 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-18 00:54:08,940 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:54:08,940 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1051975501] [2022-03-18 00:54:08,940 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1051975501] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:54:08,941 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:54:08,941 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [92] imperfect sequences [] total 92 [2022-03-18 00:54:08,941 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [375976074] [2022-03-18 00:54:08,941 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:54:08,941 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 92 states [2022-03-18 00:54:08,941 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:54:08,941 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 92 interpolants. [2022-03-18 00:54:08,942 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=181, Invalid=8191, Unknown=0, NotChecked=0, Total=8372 [2022-03-18 00:54:08,942 INFO L87 Difference]: Start difference. First operand 277 states and 278 transitions. Second operand has 92 states, 92 states have (on average 2.9456521739130435) internal successors, (271), 91 states have internal predecessors, (271), 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) [2022-03-18 00:54:18,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:54:18,252 INFO L93 Difference]: Finished difference Result 289 states and 293 transitions. [2022-03-18 00:54:18,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2022-03-18 00:54:18,253 INFO L78 Accepts]: Start accepts. Automaton has has 92 states, 92 states have (on average 2.9456521739130435) internal successors, (271), 91 states have internal predecessors, (271), 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 275 [2022-03-18 00:54:18,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:54:18,254 INFO L225 Difference]: With dead ends: 289 [2022-03-18 00:54:18,254 INFO L226 Difference]: Without dead ends: 281 [2022-03-18 00:54:18,255 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 364 GetRequests, 8 SyntacticMatches, 177 SemanticMatches, 179 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3916 ImplicationChecksByTransitivity, 9.7s TimeCoverageRelationStatistics Valid=537, Invalid=32043, Unknown=0, NotChecked=0, Total=32580 [2022-03-18 00:54:18,255 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 189 mSDsluCounter, 447 mSDsCounter, 0 mSdLazyCounter, 24387 mSolverCounterSat, 92 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 189 SdHoareTripleChecker+Valid, 459 SdHoareTripleChecker+Invalid, 24479 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 92 IncrementalHoareTripleChecker+Valid, 24387 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.4s IncrementalHoareTripleChecker+Time [2022-03-18 00:54:18,255 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [189 Valid, 459 Invalid, 24479 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [92 Valid, 24387 Invalid, 0 Unknown, 0 Unchecked, 6.4s Time] [2022-03-18 00:54:18,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 281 states. [2022-03-18 00:54:18,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 281 to 280. [2022-03-18 00:54:18,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 280 states, 275 states have (on average 1.0072727272727273) internal successors, (277), 275 states have internal predecessors, (277), 3 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) [2022-03-18 00:54:18,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 280 states to 280 states and 281 transitions. [2022-03-18 00:54:18,314 INFO L78 Accepts]: Start accepts. Automaton has 280 states and 281 transitions. Word has length 275 [2022-03-18 00:54:18,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:54:18,315 INFO L478 AbstractCegarLoop]: Abstraction has 280 states and 281 transitions. [2022-03-18 00:54:18,315 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 92 states, 92 states have (on average 2.9456521739130435) internal successors, (271), 91 states have internal predecessors, (271), 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) [2022-03-18 00:54:18,315 INFO L276 IsEmpty]: Start isEmpty. Operand 280 states and 281 transitions. [2022-03-18 00:54:18,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 279 [2022-03-18 00:54:18,316 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:54:18,316 INFO L500 BasicCegarLoop]: trace histogram [89, 89, 89, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:54:18,316 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89 [2022-03-18 00:54:18,316 INFO L403 AbstractCegarLoop]: === Iteration 91 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:54:18,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:54:18,316 INFO L85 PathProgramCache]: Analyzing trace with hash 383558027, now seen corresponding path program 89 times [2022-03-18 00:54:18,316 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:54:18,316 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [423123334] [2022-03-18 00:54:18,457 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-18 00:54:18,457 INFO L85 PathProgramCache]: Analyzing trace with hash -302850480, now seen corresponding path program 1 times [2022-03-18 00:54:18,457 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:54:18,457 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1371174259] [2022-03-18 00:54:18,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:54:18,457 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:54:18,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:54:18,470 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:54:18,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:54:18,471 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:54:18,471 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:54:18,471 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1371174259] [2022-03-18 00:54:18,471 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1371174259] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:54:18,471 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:54:18,471 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-18 00:54:25,781 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:54:25,781 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [423123334] [2022-03-18 00:54:25,782 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [423123334] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:54:25,782 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:54:25,782 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [93] imperfect sequences [] total 93 [2022-03-18 00:54:25,782 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [836321308] [2022-03-18 00:54:25,782 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:54:25,782 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 93 states [2022-03-18 00:54:25,782 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:54:25,782 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 93 interpolants. [2022-03-18 00:54:25,783 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=183, Invalid=8373, Unknown=0, NotChecked=0, Total=8556 [2022-03-18 00:54:25,783 INFO L87 Difference]: Start difference. First operand 280 states and 281 transitions. Second operand has 93 states, 93 states have (on average 2.946236559139785) internal successors, (274), 92 states have internal predecessors, (274), 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) [2022-03-18 00:54:35,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:54:35,184 INFO L93 Difference]: Finished difference Result 292 states and 296 transitions. [2022-03-18 00:54:35,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2022-03-18 00:54:35,184 INFO L78 Accepts]: Start accepts. Automaton has has 93 states, 93 states have (on average 2.946236559139785) internal successors, (274), 92 states have internal predecessors, (274), 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 278 [2022-03-18 00:54:35,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:54:35,185 INFO L225 Difference]: With dead ends: 292 [2022-03-18 00:54:35,185 INFO L226 Difference]: Without dead ends: 284 [2022-03-18 00:54:35,186 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 368 GetRequests, 8 SyntacticMatches, 179 SemanticMatches, 181 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4005 ImplicationChecksByTransitivity, 9.9s TimeCoverageRelationStatistics Valid=543, Invalid=32763, Unknown=0, NotChecked=0, Total=33306 [2022-03-18 00:54:35,186 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 191 mSDsluCounter, 452 mSDsCounter, 0 mSdLazyCounter, 24931 mSolverCounterSat, 93 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 191 SdHoareTripleChecker+Valid, 464 SdHoareTripleChecker+Invalid, 25024 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 93 IncrementalHoareTripleChecker+Valid, 24931 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.5s IncrementalHoareTripleChecker+Time [2022-03-18 00:54:35,186 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [191 Valid, 464 Invalid, 25024 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [93 Valid, 24931 Invalid, 0 Unknown, 0 Unchecked, 6.5s Time] [2022-03-18 00:54:35,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 284 states. [2022-03-18 00:54:35,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 284 to 283. [2022-03-18 00:54:35,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 283 states, 278 states have (on average 1.0071942446043165) internal successors, (280), 278 states have internal predecessors, (280), 3 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) [2022-03-18 00:54:35,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 283 states to 283 states and 284 transitions. [2022-03-18 00:54:35,255 INFO L78 Accepts]: Start accepts. Automaton has 283 states and 284 transitions. Word has length 278 [2022-03-18 00:54:35,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:54:35,255 INFO L478 AbstractCegarLoop]: Abstraction has 283 states and 284 transitions. [2022-03-18 00:54:35,256 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 93 states, 93 states have (on average 2.946236559139785) internal successors, (274), 92 states have internal predecessors, (274), 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) [2022-03-18 00:54:35,256 INFO L276 IsEmpty]: Start isEmpty. Operand 283 states and 284 transitions. [2022-03-18 00:54:35,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 282 [2022-03-18 00:54:35,256 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:54:35,257 INFO L500 BasicCegarLoop]: trace histogram [90, 90, 90, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:54:35,257 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90 [2022-03-18 00:54:35,257 INFO L403 AbstractCegarLoop]: === Iteration 92 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:54:35,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:54:35,257 INFO L85 PathProgramCache]: Analyzing trace with hash 254001347, now seen corresponding path program 90 times [2022-03-18 00:54:35,257 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:54:35,257 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1402140191] [2022-03-18 00:54:35,357 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-18 00:54:35,357 INFO L85 PathProgramCache]: Analyzing trace with hash -243745136, now seen corresponding path program 1 times [2022-03-18 00:54:35,357 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:54:35,357 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1839071134] [2022-03-18 00:54:35,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:54:35,357 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:54:35,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:54:35,377 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:54:35,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:54:35,379 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:54:35,379 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:54:35,379 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1839071134] [2022-03-18 00:54:35,379 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1839071134] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:54:35,379 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:54:35,380 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-18 00:54:42,886 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:54:42,886 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1402140191] [2022-03-18 00:54:42,886 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1402140191] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:54:42,886 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:54:42,886 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [94] imperfect sequences [] total 94 [2022-03-18 00:54:42,886 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1580667529] [2022-03-18 00:54:42,886 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:54:42,887 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 94 states [2022-03-18 00:54:42,887 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:54:42,887 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 94 interpolants. [2022-03-18 00:54:42,887 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=185, Invalid=8557, Unknown=0, NotChecked=0, Total=8742 [2022-03-18 00:54:42,888 INFO L87 Difference]: Start difference. First operand 283 states and 284 transitions. Second operand has 94 states, 94 states have (on average 2.9468085106382977) internal successors, (277), 93 states have internal predecessors, (277), 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) [2022-03-18 00:54:52,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:54:52,503 INFO L93 Difference]: Finished difference Result 295 states and 299 transitions. [2022-03-18 00:54:52,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2022-03-18 00:54:52,504 INFO L78 Accepts]: Start accepts. Automaton has has 94 states, 94 states have (on average 2.9468085106382977) internal successors, (277), 93 states have internal predecessors, (277), 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 281 [2022-03-18 00:54:52,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:54:52,505 INFO L225 Difference]: With dead ends: 295 [2022-03-18 00:54:52,505 INFO L226 Difference]: Without dead ends: 287 [2022-03-18 00:54:52,506 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 372 GetRequests, 8 SyntacticMatches, 181 SemanticMatches, 183 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4095 ImplicationChecksByTransitivity, 10.1s TimeCoverageRelationStatistics Valid=549, Invalid=33491, Unknown=0, NotChecked=0, Total=34040 [2022-03-18 00:54:52,506 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 193 mSDsluCounter, 457 mSDsCounter, 0 mSdLazyCounter, 25481 mSolverCounterSat, 94 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 193 SdHoareTripleChecker+Valid, 469 SdHoareTripleChecker+Invalid, 25575 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 94 IncrementalHoareTripleChecker+Valid, 25481 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.6s IncrementalHoareTripleChecker+Time [2022-03-18 00:54:52,507 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [193 Valid, 469 Invalid, 25575 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [94 Valid, 25481 Invalid, 0 Unknown, 0 Unchecked, 6.6s Time] [2022-03-18 00:54:52,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 287 states. [2022-03-18 00:54:52,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 287 to 286. [2022-03-18 00:54:52,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 286 states, 281 states have (on average 1.00711743772242) internal successors, (283), 281 states have internal predecessors, (283), 3 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) [2022-03-18 00:54:52,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 286 states to 286 states and 287 transitions. [2022-03-18 00:54:52,587 INFO L78 Accepts]: Start accepts. Automaton has 286 states and 287 transitions. Word has length 281 [2022-03-18 00:54:52,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:54:52,587 INFO L478 AbstractCegarLoop]: Abstraction has 286 states and 287 transitions. [2022-03-18 00:54:52,587 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 94 states, 94 states have (on average 2.9468085106382977) internal successors, (277), 93 states have internal predecessors, (277), 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) [2022-03-18 00:54:52,587 INFO L276 IsEmpty]: Start isEmpty. Operand 286 states and 287 transitions. [2022-03-18 00:54:52,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 285 [2022-03-18 00:54:52,588 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:54:52,588 INFO L500 BasicCegarLoop]: trace histogram [91, 91, 91, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:54:52,589 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91 [2022-03-18 00:54:52,589 INFO L403 AbstractCegarLoop]: === Iteration 93 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:54:52,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:54:52,589 INFO L85 PathProgramCache]: Analyzing trace with hash 1806546571, now seen corresponding path program 91 times [2022-03-18 00:54:52,589 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:54:52,589 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [748889710] [2022-03-18 00:54:52,685 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-18 00:54:52,685 INFO L85 PathProgramCache]: Analyzing trace with hash -184639792, now seen corresponding path program 1 times [2022-03-18 00:54:52,685 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:54:52,685 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1633795777] [2022-03-18 00:54:52,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:54:52,686 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:54:52,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:54:52,708 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:54:52,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:54:52,710 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:54:52,710 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:54:52,710 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1633795777] [2022-03-18 00:54:52,710 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1633795777] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:54:52,711 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:54:52,711 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-18 00:55:00,334 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:55:00,334 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [748889710] [2022-03-18 00:55:00,334 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [748889710] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:55:00,334 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:55:00,335 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [95] imperfect sequences [] total 95 [2022-03-18 00:55:00,335 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [469091783] [2022-03-18 00:55:00,335 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:55:00,335 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 95 states [2022-03-18 00:55:00,335 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:55:00,335 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 95 interpolants. [2022-03-18 00:55:00,336 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=187, Invalid=8743, Unknown=0, NotChecked=0, Total=8930 [2022-03-18 00:55:00,336 INFO L87 Difference]: Start difference. First operand 286 states and 287 transitions. Second operand has 95 states, 95 states have (on average 2.9473684210526314) internal successors, (280), 94 states have internal predecessors, (280), 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) [2022-03-18 00:55:10,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:55:10,251 INFO L93 Difference]: Finished difference Result 298 states and 302 transitions. [2022-03-18 00:55:10,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2022-03-18 00:55:10,255 INFO L78 Accepts]: Start accepts. Automaton has has 95 states, 95 states have (on average 2.9473684210526314) internal successors, (280), 94 states have internal predecessors, (280), 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 284 [2022-03-18 00:55:10,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:55:10,256 INFO L225 Difference]: With dead ends: 298 [2022-03-18 00:55:10,256 INFO L226 Difference]: Without dead ends: 290 [2022-03-18 00:55:10,257 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 376 GetRequests, 8 SyntacticMatches, 183 SemanticMatches, 185 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4186 ImplicationChecksByTransitivity, 10.3s TimeCoverageRelationStatistics Valid=555, Invalid=34227, Unknown=0, NotChecked=0, Total=34782 [2022-03-18 00:55:10,257 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 195 mSDsluCounter, 462 mSDsCounter, 0 mSdLazyCounter, 26037 mSolverCounterSat, 95 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 195 SdHoareTripleChecker+Valid, 474 SdHoareTripleChecker+Invalid, 26132 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 95 IncrementalHoareTripleChecker+Valid, 26037 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.8s IncrementalHoareTripleChecker+Time [2022-03-18 00:55:10,257 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [195 Valid, 474 Invalid, 26132 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [95 Valid, 26037 Invalid, 0 Unknown, 0 Unchecked, 6.8s Time] [2022-03-18 00:55:10,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 290 states. [2022-03-18 00:55:10,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 290 to 289. [2022-03-18 00:55:10,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 289 states, 284 states have (on average 1.0070422535211268) internal successors, (286), 284 states have internal predecessors, (286), 3 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) [2022-03-18 00:55:10,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 289 states to 289 states and 290 transitions. [2022-03-18 00:55:10,324 INFO L78 Accepts]: Start accepts. Automaton has 289 states and 290 transitions. Word has length 284 [2022-03-18 00:55:10,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:55:10,324 INFO L478 AbstractCegarLoop]: Abstraction has 289 states and 290 transitions. [2022-03-18 00:55:10,324 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 95 states, 95 states have (on average 2.9473684210526314) internal successors, (280), 94 states have internal predecessors, (280), 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) [2022-03-18 00:55:10,324 INFO L276 IsEmpty]: Start isEmpty. Operand 289 states and 290 transitions. [2022-03-18 00:55:10,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 288 [2022-03-18 00:55:10,325 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:55:10,325 INFO L500 BasicCegarLoop]: trace histogram [92, 92, 92, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:55:10,325 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92 [2022-03-18 00:55:10,325 INFO L403 AbstractCegarLoop]: === Iteration 94 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:55:10,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:55:10,325 INFO L85 PathProgramCache]: Analyzing trace with hash 1178504131, now seen corresponding path program 92 times [2022-03-18 00:55:10,325 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:55:10,325 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1079172585] [2022-03-18 00:55:10,441 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-18 00:55:10,442 INFO L85 PathProgramCache]: Analyzing trace with hash -125534448, now seen corresponding path program 1 times [2022-03-18 00:55:10,442 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:55:10,442 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [215012598] [2022-03-18 00:55:10,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:55:10,442 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:55:10,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:55:10,467 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:55:10,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:55:10,469 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:55:10,469 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:55:10,470 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [215012598] [2022-03-18 00:55:10,470 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [215012598] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:55:10,470 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:55:10,470 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-18 00:55:18,456 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:55:18,457 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1079172585] [2022-03-18 00:55:18,457 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1079172585] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:55:18,457 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:55:18,457 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [96] imperfect sequences [] total 96 [2022-03-18 00:55:18,457 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1871797961] [2022-03-18 00:55:18,457 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:55:18,457 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 96 states [2022-03-18 00:55:18,457 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:55:18,457 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 96 interpolants. [2022-03-18 00:55:18,458 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=189, Invalid=8931, Unknown=0, NotChecked=0, Total=9120 [2022-03-18 00:55:18,458 INFO L87 Difference]: Start difference. First operand 289 states and 290 transitions. Second operand has 96 states, 96 states have (on average 2.9479166666666665) internal successors, (283), 95 states have internal predecessors, (283), 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) [2022-03-18 00:55:28,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:55:28,541 INFO L93 Difference]: Finished difference Result 301 states and 305 transitions. [2022-03-18 00:55:28,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2022-03-18 00:55:28,542 INFO L78 Accepts]: Start accepts. Automaton has has 96 states, 96 states have (on average 2.9479166666666665) internal successors, (283), 95 states have internal predecessors, (283), 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 287 [2022-03-18 00:55:28,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:55:28,543 INFO L225 Difference]: With dead ends: 301 [2022-03-18 00:55:28,543 INFO L226 Difference]: Without dead ends: 293 [2022-03-18 00:55:28,544 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 380 GetRequests, 8 SyntacticMatches, 185 SemanticMatches, 187 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4278 ImplicationChecksByTransitivity, 10.7s TimeCoverageRelationStatistics Valid=561, Invalid=34971, Unknown=0, NotChecked=0, Total=35532 [2022-03-18 00:55:28,544 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 197 mSDsluCounter, 467 mSDsCounter, 0 mSdLazyCounter, 26599 mSolverCounterSat, 96 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 197 SdHoareTripleChecker+Valid, 479 SdHoareTripleChecker+Invalid, 26695 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 96 IncrementalHoareTripleChecker+Valid, 26599 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.9s IncrementalHoareTripleChecker+Time [2022-03-18 00:55:28,544 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [197 Valid, 479 Invalid, 26695 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [96 Valid, 26599 Invalid, 0 Unknown, 0 Unchecked, 6.9s Time] [2022-03-18 00:55:28,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 293 states. [2022-03-18 00:55:28,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 293 to 292. [2022-03-18 00:55:28,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 292 states, 287 states have (on average 1.0069686411149825) internal successors, (289), 287 states have internal predecessors, (289), 3 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) [2022-03-18 00:55:28,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 292 states to 292 states and 293 transitions. [2022-03-18 00:55:28,602 INFO L78 Accepts]: Start accepts. Automaton has 292 states and 293 transitions. Word has length 287 [2022-03-18 00:55:28,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:55:28,602 INFO L478 AbstractCegarLoop]: Abstraction has 292 states and 293 transitions. [2022-03-18 00:55:28,602 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 96 states, 96 states have (on average 2.9479166666666665) internal successors, (283), 95 states have internal predecessors, (283), 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) [2022-03-18 00:55:28,602 INFO L276 IsEmpty]: Start isEmpty. Operand 292 states and 293 transitions. [2022-03-18 00:55:28,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 291 [2022-03-18 00:55:28,603 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:55:28,603 INFO L500 BasicCegarLoop]: trace histogram [93, 93, 93, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:55:28,603 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93 [2022-03-18 00:55:28,603 INFO L403 AbstractCegarLoop]: === Iteration 95 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:55:28,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:55:28,604 INFO L85 PathProgramCache]: Analyzing trace with hash 43715467, now seen corresponding path program 93 times [2022-03-18 00:55:28,604 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:55:28,604 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [112104800] [2022-03-18 00:55:28,742 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-18 00:55:28,742 INFO L85 PathProgramCache]: Analyzing trace with hash -66429104, now seen corresponding path program 1 times [2022-03-18 00:55:28,742 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:55:28,742 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1921618528] [2022-03-18 00:55:28,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:55:28,742 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:55:28,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:55:28,766 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:55:28,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:55:28,768 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:55:28,768 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:55:28,769 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1921618528] [2022-03-18 00:55:28,769 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1921618528] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:55:28,769 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:55:28,769 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-18 00:55:36,645 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:55:36,646 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [112104800] [2022-03-18 00:55:36,646 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [112104800] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:55:36,646 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:55:36,646 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [97] imperfect sequences [] total 97 [2022-03-18 00:55:36,646 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1930809741] [2022-03-18 00:55:36,646 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:55:36,647 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 97 states [2022-03-18 00:55:36,647 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:55:36,647 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 97 interpolants. [2022-03-18 00:55:36,647 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=191, Invalid=9121, Unknown=0, NotChecked=0, Total=9312 [2022-03-18 00:55:36,648 INFO L87 Difference]: Start difference. First operand 292 states and 293 transitions. Second operand has 97 states, 97 states have (on average 2.948453608247423) internal successors, (286), 96 states have internal predecessors, (286), 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) [2022-03-18 00:55:46,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:55:46,959 INFO L93 Difference]: Finished difference Result 304 states and 308 transitions. [2022-03-18 00:55:46,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2022-03-18 00:55:46,959 INFO L78 Accepts]: Start accepts. Automaton has has 97 states, 97 states have (on average 2.948453608247423) internal successors, (286), 96 states have internal predecessors, (286), 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 290 [2022-03-18 00:55:46,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:55:46,960 INFO L225 Difference]: With dead ends: 304 [2022-03-18 00:55:46,960 INFO L226 Difference]: Without dead ends: 296 [2022-03-18 00:55:46,961 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 384 GetRequests, 8 SyntacticMatches, 187 SemanticMatches, 189 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4371 ImplicationChecksByTransitivity, 10.7s TimeCoverageRelationStatistics Valid=567, Invalid=35723, Unknown=0, NotChecked=0, Total=36290 [2022-03-18 00:55:46,962 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 199 mSDsluCounter, 472 mSDsCounter, 0 mSdLazyCounter, 27167 mSolverCounterSat, 97 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 199 SdHoareTripleChecker+Valid, 484 SdHoareTripleChecker+Invalid, 27264 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 97 IncrementalHoareTripleChecker+Valid, 27167 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.1s IncrementalHoareTripleChecker+Time [2022-03-18 00:55:46,962 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [199 Valid, 484 Invalid, 27264 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [97 Valid, 27167 Invalid, 0 Unknown, 0 Unchecked, 7.1s Time] [2022-03-18 00:55:46,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 296 states. [2022-03-18 00:55:47,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 296 to 295. [2022-03-18 00:55:47,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 295 states, 290 states have (on average 1.006896551724138) internal successors, (292), 290 states have internal predecessors, (292), 3 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) [2022-03-18 00:55:47,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 295 states to 295 states and 296 transitions. [2022-03-18 00:55:47,028 INFO L78 Accepts]: Start accepts. Automaton has 295 states and 296 transitions. Word has length 290 [2022-03-18 00:55:47,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:55:47,028 INFO L478 AbstractCegarLoop]: Abstraction has 295 states and 296 transitions. [2022-03-18 00:55:47,028 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 97 states, 97 states have (on average 2.948453608247423) internal successors, (286), 96 states have internal predecessors, (286), 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) [2022-03-18 00:55:47,028 INFO L276 IsEmpty]: Start isEmpty. Operand 295 states and 296 transitions. [2022-03-18 00:55:47,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 294 [2022-03-18 00:55:47,029 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:55:47,029 INFO L500 BasicCegarLoop]: trace histogram [94, 94, 94, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:55:47,029 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94 [2022-03-18 00:55:47,029 INFO L403 AbstractCegarLoop]: === Iteration 96 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:55:47,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:55:47,029 INFO L85 PathProgramCache]: Analyzing trace with hash -757786941, now seen corresponding path program 94 times [2022-03-18 00:55:47,029 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:55:47,030 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1690965703] [2022-03-18 00:55:47,158 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-18 00:55:47,158 INFO L85 PathProgramCache]: Analyzing trace with hash -7323760, now seen corresponding path program 1 times [2022-03-18 00:55:47,158 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:55:47,158 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [962367980] [2022-03-18 00:55:47,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:55:47,158 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:55:47,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:55:47,177 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:55:47,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:55:47,179 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:55:47,179 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:55:47,179 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [962367980] [2022-03-18 00:55:47,179 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [962367980] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:55:47,179 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:55:47,180 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-18 00:55:55,253 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:55:55,253 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1690965703] [2022-03-18 00:55:55,254 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1690965703] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:55:55,254 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:55:55,254 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [98] imperfect sequences [] total 98 [2022-03-18 00:55:55,254 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [347892441] [2022-03-18 00:55:55,254 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:55:55,254 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 98 states [2022-03-18 00:55:55,254 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:55:55,254 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 98 interpolants. [2022-03-18 00:55:55,255 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=193, Invalid=9313, Unknown=0, NotChecked=0, Total=9506 [2022-03-18 00:55:55,255 INFO L87 Difference]: Start difference. First operand 295 states and 296 transitions. Second operand has 98 states, 98 states have (on average 2.9489795918367347) internal successors, (289), 97 states have internal predecessors, (289), 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) [2022-03-18 00:56:05,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:56:05,806 INFO L93 Difference]: Finished difference Result 307 states and 311 transitions. [2022-03-18 00:56:05,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2022-03-18 00:56:05,806 INFO L78 Accepts]: Start accepts. Automaton has has 98 states, 98 states have (on average 2.9489795918367347) internal successors, (289), 97 states have internal predecessors, (289), 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 293 [2022-03-18 00:56:05,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:56:05,807 INFO L225 Difference]: With dead ends: 307 [2022-03-18 00:56:05,807 INFO L226 Difference]: Without dead ends: 299 [2022-03-18 00:56:05,808 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 388 GetRequests, 8 SyntacticMatches, 189 SemanticMatches, 191 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4465 ImplicationChecksByTransitivity, 11.0s TimeCoverageRelationStatistics Valid=573, Invalid=36483, Unknown=0, NotChecked=0, Total=37056 [2022-03-18 00:56:05,808 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 201 mSDsluCounter, 477 mSDsCounter, 0 mSdLazyCounter, 27741 mSolverCounterSat, 98 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 201 SdHoareTripleChecker+Valid, 489 SdHoareTripleChecker+Invalid, 27839 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 98 IncrementalHoareTripleChecker+Valid, 27741 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.2s IncrementalHoareTripleChecker+Time [2022-03-18 00:56:05,809 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [201 Valid, 489 Invalid, 27839 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [98 Valid, 27741 Invalid, 0 Unknown, 0 Unchecked, 7.2s Time] [2022-03-18 00:56:05,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 299 states. [2022-03-18 00:56:05,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 299 to 298. [2022-03-18 00:56:05,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 298 states, 293 states have (on average 1.006825938566553) internal successors, (295), 293 states have internal predecessors, (295), 3 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) [2022-03-18 00:56:05,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 298 states to 298 states and 299 transitions. [2022-03-18 00:56:05,868 INFO L78 Accepts]: Start accepts. Automaton has 298 states and 299 transitions. Word has length 293 [2022-03-18 00:56:05,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:56:05,868 INFO L478 AbstractCegarLoop]: Abstraction has 298 states and 299 transitions. [2022-03-18 00:56:05,868 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 98 states, 98 states have (on average 2.9489795918367347) internal successors, (289), 97 states have internal predecessors, (289), 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) [2022-03-18 00:56:05,868 INFO L276 IsEmpty]: Start isEmpty. Operand 298 states and 299 transitions. [2022-03-18 00:56:05,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 297 [2022-03-18 00:56:05,869 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:56:05,869 INFO L500 BasicCegarLoop]: trace histogram [95, 95, 95, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:56:05,869 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95 [2022-03-18 00:56:05,870 INFO L403 AbstractCegarLoop]: === Iteration 97 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:56:05,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:56:05,870 INFO L85 PathProgramCache]: Analyzing trace with hash 1702142091, now seen corresponding path program 95 times [2022-03-18 00:56:05,870 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:56:05,870 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1067613368] [2022-03-18 00:56:05,963 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-18 00:56:05,963 INFO L85 PathProgramCache]: Analyzing trace with hash 51781584, now seen corresponding path program 1 times [2022-03-18 00:56:05,963 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:56:05,963 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1608949296] [2022-03-18 00:56:05,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:56:05,963 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:56:05,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:56:05,976 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:56:05,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:56:05,977 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:56:05,977 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:56:05,978 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1608949296] [2022-03-18 00:56:05,978 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1608949296] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:56:05,978 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:56:05,978 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-18 00:56:14,202 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:56:14,202 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1067613368] [2022-03-18 00:56:14,202 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1067613368] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:56:14,202 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:56:14,202 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [99] imperfect sequences [] total 99 [2022-03-18 00:56:14,203 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1026247520] [2022-03-18 00:56:14,203 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:56:14,203 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 99 states [2022-03-18 00:56:14,203 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:56:14,203 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 99 interpolants. [2022-03-18 00:56:14,204 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=195, Invalid=9507, Unknown=0, NotChecked=0, Total=9702 [2022-03-18 00:56:14,204 INFO L87 Difference]: Start difference. First operand 298 states and 299 transitions. Second operand has 99 states, 99 states have (on average 2.9494949494949494) internal successors, (292), 98 states have internal predecessors, (292), 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) [2022-03-18 00:56:24,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:56:24,924 INFO L93 Difference]: Finished difference Result 310 states and 314 transitions. [2022-03-18 00:56:24,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2022-03-18 00:56:24,924 INFO L78 Accepts]: Start accepts. Automaton has has 99 states, 99 states have (on average 2.9494949494949494) internal successors, (292), 98 states have internal predecessors, (292), 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 296 [2022-03-18 00:56:24,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:56:24,926 INFO L225 Difference]: With dead ends: 310 [2022-03-18 00:56:24,926 INFO L226 Difference]: Without dead ends: 302 [2022-03-18 00:56:24,927 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 392 GetRequests, 8 SyntacticMatches, 191 SemanticMatches, 193 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4560 ImplicationChecksByTransitivity, 11.1s TimeCoverageRelationStatistics Valid=579, Invalid=37251, Unknown=0, NotChecked=0, Total=37830 [2022-03-18 00:56:24,928 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 203 mSDsluCounter, 482 mSDsCounter, 0 mSdLazyCounter, 28321 mSolverCounterSat, 99 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 203 SdHoareTripleChecker+Valid, 494 SdHoareTripleChecker+Invalid, 28420 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 99 IncrementalHoareTripleChecker+Valid, 28321 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.4s IncrementalHoareTripleChecker+Time [2022-03-18 00:56:24,928 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [203 Valid, 494 Invalid, 28420 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [99 Valid, 28321 Invalid, 0 Unknown, 0 Unchecked, 7.4s Time] [2022-03-18 00:56:24,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 302 states. [2022-03-18 00:56:25,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 302 to 301. [2022-03-18 00:56:25,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 301 states, 296 states have (on average 1.0067567567567568) internal successors, (298), 296 states have internal predecessors, (298), 3 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) [2022-03-18 00:56:25,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 301 states to 301 states and 302 transitions. [2022-03-18 00:56:25,005 INFO L78 Accepts]: Start accepts. Automaton has 301 states and 302 transitions. Word has length 296 [2022-03-18 00:56:25,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:56:25,006 INFO L478 AbstractCegarLoop]: Abstraction has 301 states and 302 transitions. [2022-03-18 00:56:25,006 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 99 states, 99 states have (on average 2.9494949494949494) internal successors, (292), 98 states have internal predecessors, (292), 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) [2022-03-18 00:56:25,006 INFO L276 IsEmpty]: Start isEmpty. Operand 301 states and 302 transitions. [2022-03-18 00:56:25,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 300 [2022-03-18 00:56:25,007 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:56:25,007 INFO L500 BasicCegarLoop]: trace histogram [96, 96, 96, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:56:25,007 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96 [2022-03-18 00:56:25,007 INFO L403 AbstractCegarLoop]: === Iteration 98 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:56:25,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:56:25,007 INFO L85 PathProgramCache]: Analyzing trace with hash 420962755, now seen corresponding path program 96 times [2022-03-18 00:56:25,007 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:56:25,007 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1179288826] [2022-03-18 00:56:25,103 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-18 00:56:25,103 INFO L85 PathProgramCache]: Analyzing trace with hash 110886928, now seen corresponding path program 1 times [2022-03-18 00:56:25,103 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:56:25,103 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [541540203] [2022-03-18 00:56:25,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:56:25,104 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:56:25,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:56:25,117 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:56:25,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:56:25,119 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:56:25,119 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:56:25,119 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [541540203] [2022-03-18 00:56:25,119 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [541540203] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:56:25,119 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:56:25,119 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-18 00:56:33,448 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:56:33,448 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1179288826] [2022-03-18 00:56:33,448 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1179288826] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:56:33,448 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:56:33,448 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [100] imperfect sequences [] total 100 [2022-03-18 00:56:33,448 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1357330730] [2022-03-18 00:56:33,448 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:56:33,449 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 100 states [2022-03-18 00:56:33,449 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:56:33,449 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 100 interpolants. [2022-03-18 00:56:33,450 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=197, Invalid=9703, Unknown=0, NotChecked=0, Total=9900 [2022-03-18 00:56:33,450 INFO L87 Difference]: Start difference. First operand 301 states and 302 transitions. Second operand has 100 states, 100 states have (on average 2.95) internal successors, (295), 99 states have internal predecessors, (295), 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) [2022-03-18 00:56:44,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:56:44,582 INFO L93 Difference]: Finished difference Result 313 states and 317 transitions. [2022-03-18 00:56:44,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2022-03-18 00:56:44,582 INFO L78 Accepts]: Start accepts. Automaton has has 100 states, 100 states have (on average 2.95) internal successors, (295), 99 states have internal predecessors, (295), 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 299 [2022-03-18 00:56:44,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:56:44,583 INFO L225 Difference]: With dead ends: 313 [2022-03-18 00:56:44,583 INFO L226 Difference]: Without dead ends: 305 [2022-03-18 00:56:44,585 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 396 GetRequests, 8 SyntacticMatches, 193 SemanticMatches, 195 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4656 ImplicationChecksByTransitivity, 11.3s TimeCoverageRelationStatistics Valid=585, Invalid=38027, Unknown=0, NotChecked=0, Total=38612 [2022-03-18 00:56:44,585 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 205 mSDsluCounter, 487 mSDsCounter, 0 mSdLazyCounter, 28907 mSolverCounterSat, 100 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 205 SdHoareTripleChecker+Valid, 499 SdHoareTripleChecker+Invalid, 29007 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 100 IncrementalHoareTripleChecker+Valid, 28907 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.7s IncrementalHoareTripleChecker+Time [2022-03-18 00:56:44,586 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [205 Valid, 499 Invalid, 29007 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [100 Valid, 28907 Invalid, 0 Unknown, 0 Unchecked, 7.7s Time] [2022-03-18 00:56:44,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 305 states. [2022-03-18 00:56:44,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 305 to 304. [2022-03-18 00:56:44,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 304 states, 299 states have (on average 1.0066889632107023) internal successors, (301), 299 states have internal predecessors, (301), 3 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) [2022-03-18 00:56:44,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 304 states to 304 states and 305 transitions. [2022-03-18 00:56:44,658 INFO L78 Accepts]: Start accepts. Automaton has 304 states and 305 transitions. Word has length 299 [2022-03-18 00:56:44,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:56:44,659 INFO L478 AbstractCegarLoop]: Abstraction has 304 states and 305 transitions. [2022-03-18 00:56:44,659 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 100 states, 100 states have (on average 2.95) internal successors, (295), 99 states have internal predecessors, (295), 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) [2022-03-18 00:56:44,659 INFO L276 IsEmpty]: Start isEmpty. Operand 304 states and 305 transitions. [2022-03-18 00:56:44,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 303 [2022-03-18 00:56:44,660 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:56:44,660 INFO L500 BasicCegarLoop]: trace histogram [97, 97, 97, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:56:44,660 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97 [2022-03-18 00:56:44,660 INFO L403 AbstractCegarLoop]: === Iteration 99 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:56:44,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:56:44,660 INFO L85 PathProgramCache]: Analyzing trace with hash -2113243765, now seen corresponding path program 97 times [2022-03-18 00:56:44,660 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:56:44,660 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1577259829] [2022-03-18 00:56:44,816 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-18 00:56:44,816 INFO L85 PathProgramCache]: Analyzing trace with hash 169992272, now seen corresponding path program 1 times [2022-03-18 00:56:44,816 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:56:44,816 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [122609538] [2022-03-18 00:56:44,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:56:44,816 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:56:44,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:56:44,834 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:56:44,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:56:44,837 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:56:44,837 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:56:44,837 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [122609538] [2022-03-18 00:56:44,837 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [122609538] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:56:44,837 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:56:44,837 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-18 00:56:53,434 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:56:53,434 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1577259829] [2022-03-18 00:56:53,434 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1577259829] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:56:53,434 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:56:53,434 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [101] imperfect sequences [] total 101 [2022-03-18 00:56:53,434 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [522855678] [2022-03-18 00:56:53,434 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:56:53,435 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 101 states [2022-03-18 00:56:53,435 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:56:53,435 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 101 interpolants. [2022-03-18 00:56:53,436 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=199, Invalid=9901, Unknown=0, NotChecked=0, Total=10100 [2022-03-18 00:56:53,436 INFO L87 Difference]: Start difference. First operand 304 states and 305 transitions. Second operand has 101 states, 101 states have (on average 2.9504950495049505) internal successors, (298), 100 states have internal predecessors, (298), 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)