/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/loop-new/count_by_1.i -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-b030c9e [2022-03-20 18:27:34,763 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-20 18:27:34,765 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-20 18:27:34,797 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-03-20 18:27:34,833 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-03-20 18:27:34,834 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-03-20 18:27:34,835 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-03-20 18:27:34,835 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationQvasr_64.epf [2022-03-20 18:27:34,844 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-20 18:27:34,844 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-20 18:27:34,846 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-20 18:27:34,846 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-20 18:27:34,846 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-20 18:27:34,846 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-20 18:27:34,846 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-20 18:27:34,846 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-20 18:27:34,846 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-20 18:27:34,847 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-20 18:27:34,847 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-20 18:27:34,847 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-20 18:27:34,847 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-20 18:27:34,847 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-03-20 18:27:34,848 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-20 18:27:34,848 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-20 18:27:34,848 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-20 18:27:34,848 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=Craig_NestedInterpolation [2022-03-20 18:27:34,848 INFO L138 SettingsManager]: * Trace refinement strategy=ACCELERATED_INTERPOLATION [2022-03-20 18:27:34,848 INFO L138 SettingsManager]: * Trace refinement strategy used in Accelerated Interpolation=CAMEL [2022-03-20 18:27:34,848 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-03-20 18:27:34,848 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=QVASR [2022-03-20 18:27:34,848 INFO L138 SettingsManager]: * Use separate solver for trace checks=false WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-03-20 18:27:35,031 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-20 18:27:35,046 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-20 18:27:35,048 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-20 18:27:35,048 INFO L271 PluginConnector]: Initializing CDTParser... [2022-03-20 18:27:35,049 INFO L275 PluginConnector]: CDTParser initialized [2022-03-20 18:27:35,050 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-new/count_by_1.i [2022-03-20 18:27:35,092 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/30211f8d0/c0a05c7226aa4fa3b0df150e6465d985/FLAGaeaf8becc [2022-03-20 18:27:35,425 INFO L306 CDTParser]: Found 1 translation units. [2022-03-20 18:27:35,426 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-new/count_by_1.i [2022-03-20 18:27:35,429 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/30211f8d0/c0a05c7226aa4fa3b0df150e6465d985/FLAGaeaf8becc [2022-03-20 18:27:35,438 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/30211f8d0/c0a05c7226aa4fa3b0df150e6465d985 [2022-03-20 18:27:35,440 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-20 18:27:35,440 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-03-20 18:27:35,441 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-03-20 18:27:35,441 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-03-20 18:27:35,443 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-03-20 18:27:35,444 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.03 06:27:35" (1/1) ... [2022-03-20 18:27:35,444 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2c53fe23 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 06:27:35, skipping insertion in model container [2022-03-20 18:27:35,445 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.03 06:27:35" (1/1) ... [2022-03-20 18:27:35,449 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-03-20 18:27:35,457 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-03-20 18:27:35,581 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loop-new/count_by_1.i[891,904] [2022-03-20 18:27:35,591 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-20 18:27:35,599 INFO L203 MainTranslator]: Completed pre-run [2022-03-20 18:27:35,607 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loop-new/count_by_1.i[891,904] [2022-03-20 18:27:35,608 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-20 18:27:35,616 INFO L208 MainTranslator]: Completed translation [2022-03-20 18:27:35,616 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 06:27:35 WrapperNode [2022-03-20 18:27:35,616 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-03-20 18:27:35,617 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-20 18:27:35,617 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-20 18:27:35,617 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-20 18:27:35,623 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 06:27:35" (1/1) ... [2022-03-20 18:27:35,623 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 06:27:35" (1/1) ... [2022-03-20 18:27:35,627 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 06:27:35" (1/1) ... [2022-03-20 18:27:35,627 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 06:27:35" (1/1) ... [2022-03-20 18:27:35,630 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 06:27:35" (1/1) ... [2022-03-20 18:27:35,632 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 06:27:35" (1/1) ... [2022-03-20 18:27:35,632 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 06:27:35" (1/1) ... [2022-03-20 18:27:35,633 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-20 18:27:35,634 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-20 18:27:35,634 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-20 18:27:35,634 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-20 18:27:35,634 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 06:27:35" (1/1) ... [2022-03-20 18:27:35,640 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-20 18:27:35,646 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 18:27:35,655 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-03-20 18:27:35,659 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-03-20 18:27:35,686 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-03-20 18:27:35,686 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-20 18:27:35,686 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-03-20 18:27:35,686 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-03-20 18:27:35,686 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-03-20 18:27:35,686 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-03-20 18:27:35,686 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-03-20 18:27:35,687 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-03-20 18:27:35,687 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2022-03-20 18:27:35,687 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2022-03-20 18:27:35,687 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-03-20 18:27:35,687 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-03-20 18:27:35,687 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-03-20 18:27:35,687 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-03-20 18:27:35,687 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-03-20 18:27:35,687 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-03-20 18:27:35,687 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-03-20 18:27:35,687 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-03-20 18:27:35,687 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-20 18:27:35,687 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-03-20 18:27:35,687 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-03-20 18:27:35,688 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-03-20 18:27:35,730 INFO L234 CfgBuilder]: Building ICFG [2022-03-20 18:27:35,731 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-20 18:27:35,815 INFO L275 CfgBuilder]: Performing block encoding [2022-03-20 18:27:35,819 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-20 18:27:35,819 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-03-20 18:27:35,832 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.03 06:27:35 BoogieIcfgContainer [2022-03-20 18:27:35,832 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-20 18:27:35,833 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-20 18:27:35,833 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-20 18:27:35,836 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-20 18:27:35,836 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.03 06:27:35" (1/3) ... [2022-03-20 18:27:35,837 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4be2287b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.03 06:27:35, skipping insertion in model container [2022-03-20 18:27:35,837 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 06:27:35" (2/3) ... [2022-03-20 18:27:35,837 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4be2287b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.03 06:27:35, skipping insertion in model container [2022-03-20 18:27:35,837 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.03 06:27:35" (3/3) ... [2022-03-20 18:27:35,845 INFO L111 eAbstractionObserver]: Analyzing ICFG count_by_1.i [2022-03-20 18:27:35,849 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2022-03-20 18:27:35,849 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-20 18:27:35,882 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-20 18:27:35,886 INFO L340 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=Craig_NestedInterpolation, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP [2022-03-20 18:27:35,887 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-03-20 18:27:35,895 INFO L276 IsEmpty]: Start isEmpty. Operand has 20 states, 12 states have (on average 1.3333333333333333) internal successors, (16), 13 states have internal predecessors, (16), 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) [2022-03-20 18:27:35,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-03-20 18:27:35,900 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:27:35,900 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:27:35,900 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:27:35,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:27:35,904 INFO L85 PathProgramCache]: Analyzing trace with hash 1305738320, now seen corresponding path program 1 times [2022-03-20 18:27:35,909 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:27:35,909 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [465241289] [2022-03-20 18:27:35,916 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 18:27:35,916 INFO L85 PathProgramCache]: Analyzing trace with hash 1305738320, now seen corresponding path program 2 times [2022-03-20 18:27:35,918 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:27:35,918 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1130154217] [2022-03-20 18:27:35,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:27:35,919 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:27:35,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:27:36,020 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:27:36,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:27:36,028 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:27:36,029 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:27:36,029 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1130154217] [2022-03-20 18:27:36,030 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1130154217] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:27:36,030 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:27:36,030 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 18:27:36,032 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:27:36,032 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [465241289] [2022-03-20 18:27:36,032 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [465241289] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:27:36,032 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:27:36,032 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 18:27:36,032 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [671611396] [2022-03-20 18:27:36,033 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:27:36,036 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-20 18:27:36,036 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:27:36,053 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-20 18:27:36,053 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-20 18:27:36,055 INFO L87 Difference]: Start difference. First operand has 20 states, 12 states have (on average 1.3333333333333333) internal successors, (16), 13 states have internal predecessors, (16), 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 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:27:36,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:27:36,130 INFO L93 Difference]: Finished difference Result 34 states and 39 transitions. [2022-03-20 18:27:36,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-20 18:27:36,132 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2022-03-20 18:27:36,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:27:36,136 INFO L225 Difference]: With dead ends: 34 [2022-03-20 18:27:36,136 INFO L226 Difference]: Without dead ends: 15 [2022-03-20 18:27:36,138 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-20 18:27:36,140 INFO L913 BasicCegarLoop]: 17 mSDtfsCounter, 13 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 18:27:36,141 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 26 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 18:27:36,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2022-03-20 18:27:36,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 14. [2022-03-20 18:27:36,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 9 states have (on average 1.1111111111111112) internal successors, (10), 9 states have internal predecessors, (10), 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) [2022-03-20 18:27:36,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 14 transitions. [2022-03-20 18:27:36,162 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 14 transitions. Word has length 11 [2022-03-20 18:27:36,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:27:36,163 INFO L478 AbstractCegarLoop]: Abstraction has 14 states and 14 transitions. [2022-03-20 18:27:36,163 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:27:36,163 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 14 transitions. [2022-03-20 18:27:36,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-03-20 18:27:36,163 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:27:36,163 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:27:36,164 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-20 18:27:36,164 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:27:36,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:27:36,164 INFO L85 PathProgramCache]: Analyzing trace with hash 1786070446, now seen corresponding path program 1 times [2022-03-20 18:27:36,165 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:27:36,165 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [297221951] [2022-03-20 18:27:36,234 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 18:27:36,235 INFO L85 PathProgramCache]: Analyzing trace with hash -1492527982, now seen corresponding path program 1 times [2022-03-20 18:27:36,235 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:27:36,235 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [57294702] [2022-03-20 18:27:36,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:27:36,235 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:27:36,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:27:36,270 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:27:36,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:27:36,276 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:27:36,277 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:27:36,277 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [57294702] [2022-03-20 18:27:36,277 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [57294702] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:27:36,277 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:27:36,277 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 18:27:36,286 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:27:36,287 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [297221951] [2022-03-20 18:27:36,287 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [297221951] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:27:36,287 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:27:36,287 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-20 18:27:36,287 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1572091941] [2022-03-20 18:27:36,287 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:27:36,288 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-20 18:27:36,288 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:27:36,288 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-20 18:27:36,289 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-20 18:27:36,289 INFO L87 Difference]: Start difference. First operand 14 states and 14 transitions. Second operand has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:27:36,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:27:36,325 INFO L93 Difference]: Finished difference Result 22 states and 22 transitions. [2022-03-20 18:27:36,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-20 18:27:36,325 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 13 [2022-03-20 18:27:36,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:27:36,327 INFO L225 Difference]: With dead ends: 22 [2022-03-20 18:27:36,327 INFO L226 Difference]: Without dead ends: 17 [2022-03-20 18:27:36,329 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-03-20 18:27:36,332 INFO L913 BasicCegarLoop]: 11 mSDtfsCounter, 10 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 18:27:36,335 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 23 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 18:27:36,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2022-03-20 18:27:36,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 16. [2022-03-20 18:27:36,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 11 states have (on average 1.0909090909090908) internal successors, (12), 11 states have internal predecessors, (12), 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) [2022-03-20 18:27:36,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 16 transitions. [2022-03-20 18:27:36,340 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 16 transitions. Word has length 13 [2022-03-20 18:27:36,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:27:36,341 INFO L478 AbstractCegarLoop]: Abstraction has 16 states and 16 transitions. [2022-03-20 18:27:36,341 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:27:36,341 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 16 transitions. [2022-03-20 18:27:36,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-03-20 18:27:36,341 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:27:36,341 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:27:36,341 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-03-20 18:27:36,342 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:27:36,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:27:36,342 INFO L85 PathProgramCache]: Analyzing trace with hash -471224436, now seen corresponding path program 2 times [2022-03-20 18:27:36,342 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:27:36,342 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [293166284] [2022-03-20 18:27:36,390 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 18:27:36,390 INFO L85 PathProgramCache]: Analyzing trace with hash -1433422638, now seen corresponding path program 1 times [2022-03-20 18:27:36,390 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:27:36,391 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2047470314] [2022-03-20 18:27:36,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:27:36,391 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:27:36,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:27:36,425 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:27:36,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:27:36,435 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:27:36,435 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:27:36,435 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2047470314] [2022-03-20 18:27:36,435 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2047470314] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:27:36,435 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:27:36,435 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 18:27:36,456 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:27:36,456 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [293166284] [2022-03-20 18:27:36,456 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [293166284] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:27:36,456 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:27:36,456 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-20 18:27:36,457 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1023332607] [2022-03-20 18:27:36,457 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:27:36,457 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-20 18:27:36,457 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:27:36,457 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-20 18:27:36,457 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-03-20 18:27:36,458 INFO L87 Difference]: Start difference. First operand 16 states and 16 transitions. Second operand has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 5 states have internal predecessors, (11), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:27:36,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:27:36,506 INFO L93 Difference]: Finished difference Result 24 states and 24 transitions. [2022-03-20 18:27:36,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-20 18:27:36,506 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 5 states have internal predecessors, (11), 2 states have call successors, (3), 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 15 [2022-03-20 18:27:36,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:27:36,507 INFO L225 Difference]: With dead ends: 24 [2022-03-20 18:27:36,507 INFO L226 Difference]: Without dead ends: 19 [2022-03-20 18:27:36,507 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2022-03-20 18:27:36,508 INFO L913 BasicCegarLoop]: 11 mSDtfsCounter, 11 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 18:27:36,508 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 28 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 18:27:36,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2022-03-20 18:27:36,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 18. [2022-03-20 18:27:36,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 13 states have (on average 1.0769230769230769) internal successors, (14), 13 states have internal predecessors, (14), 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) [2022-03-20 18:27:36,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 18 transitions. [2022-03-20 18:27:36,512 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 18 transitions. Word has length 15 [2022-03-20 18:27:36,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:27:36,512 INFO L478 AbstractCegarLoop]: Abstraction has 18 states and 18 transitions. [2022-03-20 18:27:36,512 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 5 states have internal predecessors, (11), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:27:36,512 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 18 transitions. [2022-03-20 18:27:36,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-20 18:27:36,513 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:27:36,513 INFO L499 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:27:36,513 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-03-20 18:27:36,513 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:27:36,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:27:36,513 INFO L85 PathProgramCache]: Analyzing trace with hash -773121558, now seen corresponding path program 3 times [2022-03-20 18:27:36,514 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:27:36,514 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [715410332] [2022-03-20 18:27:36,554 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 18:27:36,555 INFO L85 PathProgramCache]: Analyzing trace with hash -1374317294, now seen corresponding path program 1 times [2022-03-20 18:27:36,555 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:27:36,555 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1387504381] [2022-03-20 18:27:36,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:27:36,555 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:27:36,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:27:36,589 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:27:36,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:27:36,594 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:27:36,594 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:27:36,594 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1387504381] [2022-03-20 18:27:36,595 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1387504381] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:27:36,595 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:27:36,595 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 18:27:36,670 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:27:36,670 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [715410332] [2022-03-20 18:27:36,670 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [715410332] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:27:36,670 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:27:36,670 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-03-20 18:27:36,670 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1793602831] [2022-03-20 18:27:36,670 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:27:36,671 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-03-20 18:27:36,672 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:27:36,672 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-03-20 18:27:36,672 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-03-20 18:27:36,672 INFO L87 Difference]: Start difference. First operand 18 states and 18 transitions. Second operand has 7 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 6 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) [2022-03-20 18:27:36,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:27:36,741 INFO L93 Difference]: Finished difference Result 26 states and 26 transitions. [2022-03-20 18:27:36,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-20 18:27:36,741 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 6 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 [2022-03-20 18:27:36,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:27:36,743 INFO L225 Difference]: With dead ends: 26 [2022-03-20 18:27:36,744 INFO L226 Difference]: Without dead ends: 21 [2022-03-20 18:27:36,745 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2022-03-20 18:27:36,749 INFO L913 BasicCegarLoop]: 11 mSDtfsCounter, 12 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 18:27:36,750 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 33 Invalid, 63 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 18:27:36,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2022-03-20 18:27:36,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 20. [2022-03-20 18:27:36,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 15 states have (on average 1.0666666666666667) internal successors, (16), 15 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) [2022-03-20 18:27:36,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 20 transitions. [2022-03-20 18:27:36,761 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 20 transitions. Word has length 17 [2022-03-20 18:27:36,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:27:36,761 INFO L478 AbstractCegarLoop]: Abstraction has 20 states and 20 transitions. [2022-03-20 18:27:36,761 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 6 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) [2022-03-20 18:27:36,761 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 20 transitions. [2022-03-20 18:27:36,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-03-20 18:27:36,762 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:27:36,762 INFO L499 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:27:36,762 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-03-20 18:27:36,763 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:27:36,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:27:36,766 INFO L85 PathProgramCache]: Analyzing trace with hash 1161520328, now seen corresponding path program 4 times [2022-03-20 18:27:36,766 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:27:36,767 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2120906499] [2022-03-20 18:27:36,811 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 18:27:36,811 INFO L85 PathProgramCache]: Analyzing trace with hash -1315211950, now seen corresponding path program 1 times [2022-03-20 18:27:36,811 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:27:36,811 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [830172246] [2022-03-20 18:27:36,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:27:36,812 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:27:36,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:27:36,839 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:27:36,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:27:36,852 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:27:36,853 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:27:36,853 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [830172246] [2022-03-20 18:27:36,853 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [830172246] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:27:36,853 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:27:36,853 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 18:27:36,892 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:27:36,892 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2120906499] [2022-03-20 18:27:36,892 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2120906499] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:27:36,892 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:27:36,892 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-03-20 18:27:36,892 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1669330017] [2022-03-20 18:27:36,892 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:27:36,893 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-20 18:27:36,893 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:27:36,893 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-20 18:27:36,894 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-03-20 18:27:36,894 INFO L87 Difference]: Start difference. First operand 20 states and 20 transitions. Second operand has 8 states, 8 states have (on average 1.875) internal successors, (15), 7 states have internal predecessors, (15), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:27:36,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:27:36,967 INFO L93 Difference]: Finished difference Result 28 states and 28 transitions. [2022-03-20 18:27:36,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-20 18:27:36,968 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.875) internal successors, (15), 7 states have internal predecessors, (15), 2 states have call successors, (3), 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 19 [2022-03-20 18:27:36,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:27:36,969 INFO L225 Difference]: With dead ends: 28 [2022-03-20 18:27:36,969 INFO L226 Difference]: Without dead ends: 23 [2022-03-20 18:27:36,969 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 11 SyntacticMatches, 3 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2022-03-20 18:27:36,970 INFO L913 BasicCegarLoop]: 11 mSDtfsCounter, 13 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 81 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 88 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 81 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 18:27:36,971 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 38 Invalid, 88 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 81 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 18:27:36,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2022-03-20 18:27:36,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 22. [2022-03-20 18:27:36,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 17 states have (on average 1.0588235294117647) internal successors, (18), 17 states have internal predecessors, (18), 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) [2022-03-20 18:27:36,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 22 transitions. [2022-03-20 18:27:36,979 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 22 transitions. Word has length 19 [2022-03-20 18:27:36,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:27:36,980 INFO L478 AbstractCegarLoop]: Abstraction has 22 states and 22 transitions. [2022-03-20 18:27:36,980 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 1.875) internal successors, (15), 7 states have internal predecessors, (15), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:27:36,980 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 22 transitions. [2022-03-20 18:27:36,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-03-20 18:27:36,980 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:27:36,981 INFO L499 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:27:36,981 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-03-20 18:27:36,981 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:27:36,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:27:36,983 INFO L85 PathProgramCache]: Analyzing trace with hash 631533606, now seen corresponding path program 5 times [2022-03-20 18:27:36,983 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:27:36,983 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [369885855] [2022-03-20 18:27:37,014 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 18:27:37,015 INFO L85 PathProgramCache]: Analyzing trace with hash -1256106606, now seen corresponding path program 1 times [2022-03-20 18:27:37,015 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:27:37,015 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [476864905] [2022-03-20 18:27:37,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:27:37,016 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:27:37,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:27:37,036 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:27:37,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:27:37,041 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:27:37,041 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:27:37,041 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [476864905] [2022-03-20 18:27:37,041 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [476864905] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:27:37,041 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:27:37,041 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 18:27:37,074 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:27:37,074 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [369885855] [2022-03-20 18:27:37,074 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [369885855] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:27:37,074 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:27:37,074 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-03-20 18:27:37,074 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1176140689] [2022-03-20 18:27:37,075 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:27:37,075 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-20 18:27:37,075 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:27:37,075 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-20 18:27:37,075 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2022-03-20 18:27:37,075 INFO L87 Difference]: Start difference. First operand 22 states and 22 transitions. Second operand has 9 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 8 states have internal predecessors, (17), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:27:37,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:27:37,168 INFO L93 Difference]: Finished difference Result 30 states and 30 transitions. [2022-03-20 18:27:37,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-20 18:27:37,168 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 8 states have internal predecessors, (17), 2 states have call successors, (3), 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 21 [2022-03-20 18:27:37,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:27:37,169 INFO L225 Difference]: With dead ends: 30 [2022-03-20 18:27:37,169 INFO L226 Difference]: Without dead ends: 25 [2022-03-20 18:27:37,169 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2022-03-20 18:27:37,170 INFO L913 BasicCegarLoop]: 11 mSDtfsCounter, 14 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 109 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 117 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 109 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 18:27:37,171 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 43 Invalid, 117 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 109 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 18:27:37,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2022-03-20 18:27:37,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 24. [2022-03-20 18:27:37,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 19 states have (on average 1.0526315789473684) internal successors, (20), 19 states have internal predecessors, (20), 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) [2022-03-20 18:27:37,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 24 transitions. [2022-03-20 18:27:37,178 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 24 transitions. Word has length 21 [2022-03-20 18:27:37,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:27:37,178 INFO L478 AbstractCegarLoop]: Abstraction has 24 states and 24 transitions. [2022-03-20 18:27:37,179 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 8 states have internal predecessors, (17), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:27:37,179 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 24 transitions. [2022-03-20 18:27:37,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-20 18:27:37,179 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:27:37,179 INFO L499 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:27:37,179 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-03-20 18:27:37,179 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:27:37,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:27:37,180 INFO L85 PathProgramCache]: Analyzing trace with hash -1879565308, now seen corresponding path program 6 times [2022-03-20 18:27:37,180 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:27:37,180 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1911271696] [2022-03-20 18:27:37,208 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 18:27:37,208 INFO L85 PathProgramCache]: Analyzing trace with hash -1197001262, now seen corresponding path program 1 times [2022-03-20 18:27:37,208 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:27:37,209 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [536279334] [2022-03-20 18:27:37,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:27:37,209 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:27:37,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:27:37,228 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:27:37,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:27:37,233 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:27:37,233 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:27:37,233 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [536279334] [2022-03-20 18:27:37,233 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [536279334] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:27:37,233 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:27:37,233 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 18:27:37,281 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:27:37,281 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1911271696] [2022-03-20 18:27:37,281 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1911271696] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:27:37,281 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:27:37,281 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-03-20 18:27:37,281 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1588632692] [2022-03-20 18:27:37,281 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:27:37,281 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-20 18:27:37,281 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:27:37,282 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-20 18:27:37,282 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2022-03-20 18:27:37,282 INFO L87 Difference]: Start difference. First operand 24 states and 24 transitions. Second operand has 10 states, 10 states have (on average 1.9) internal successors, (19), 9 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) [2022-03-20 18:27:37,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:27:37,382 INFO L93 Difference]: Finished difference Result 32 states and 32 transitions. [2022-03-20 18:27:37,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-20 18:27:37,382 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 9 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 [2022-03-20 18:27:37,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:27:37,383 INFO L225 Difference]: With dead ends: 32 [2022-03-20 18:27:37,383 INFO L226 Difference]: Without dead ends: 27 [2022-03-20 18:27:37,383 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2022-03-20 18:27:37,384 INFO L913 BasicCegarLoop]: 11 mSDtfsCounter, 15 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 141 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 150 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 141 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 18:27:37,384 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 48 Invalid, 150 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 141 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 18:27:37,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2022-03-20 18:27:37,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 26. [2022-03-20 18:27:37,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 21 states have (on average 1.0476190476190477) internal successors, (22), 21 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) [2022-03-20 18:27:37,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 26 transitions. [2022-03-20 18:27:37,387 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 26 transitions. Word has length 23 [2022-03-20 18:27:37,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:27:37,388 INFO L478 AbstractCegarLoop]: Abstraction has 26 states and 26 transitions. [2022-03-20 18:27:37,388 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 9 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) [2022-03-20 18:27:37,388 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 26 transitions. [2022-03-20 18:27:37,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-03-20 18:27:37,388 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:27:37,388 INFO L499 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:27:37,388 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-03-20 18:27:37,388 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:27:37,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:27:37,389 INFO L85 PathProgramCache]: Analyzing trace with hash -1274001310, now seen corresponding path program 7 times [2022-03-20 18:27:37,389 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:27:37,389 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [945014908] [2022-03-20 18:27:37,414 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 18:27:37,414 INFO L85 PathProgramCache]: Analyzing trace with hash -1137895918, now seen corresponding path program 1 times [2022-03-20 18:27:37,414 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:27:37,414 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [988166439] [2022-03-20 18:27:37,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:27:37,414 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:27:37,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:27:37,432 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:27:37,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:27:37,435 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:27:37,436 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:27:37,436 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [988166439] [2022-03-20 18:27:37,436 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [988166439] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:27:37,436 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:27:37,436 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 18:27:37,488 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:27:37,489 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [945014908] [2022-03-20 18:27:37,489 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [945014908] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:27:37,489 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:27:37,489 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-03-20 18:27:37,489 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1640065793] [2022-03-20 18:27:37,489 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:27:37,489 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-20 18:27:37,489 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:27:37,490 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-20 18:27:37,490 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2022-03-20 18:27:37,490 INFO L87 Difference]: Start difference. First operand 26 states and 26 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:27:37,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:27:37,616 INFO L93 Difference]: Finished difference Result 34 states and 34 transitions. [2022-03-20 18:27:37,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-20 18:27:37,617 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 2 states have call successors, (3), 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 25 [2022-03-20 18:27:37,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:27:37,617 INFO L225 Difference]: With dead ends: 34 [2022-03-20 18:27:37,617 INFO L226 Difference]: Without dead ends: 29 [2022-03-20 18:27:37,617 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 13 SyntacticMatches, 4 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2022-03-20 18:27:37,618 INFO L913 BasicCegarLoop]: 11 mSDtfsCounter, 16 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 177 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 187 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 177 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 18:27:37,618 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 53 Invalid, 187 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 177 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 18:27:37,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2022-03-20 18:27:37,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 28. [2022-03-20 18:27:37,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 23 states have (on average 1.0434782608695652) internal successors, (24), 23 states have internal predecessors, (24), 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) [2022-03-20 18:27:37,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 28 transitions. [2022-03-20 18:27:37,622 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 28 transitions. Word has length 25 [2022-03-20 18:27:37,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:27:37,622 INFO L478 AbstractCegarLoop]: Abstraction has 28 states and 28 transitions. [2022-03-20 18:27:37,622 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:27:37,622 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 28 transitions. [2022-03-20 18:27:37,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-03-20 18:27:37,622 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:27:37,622 INFO L499 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:27:37,623 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-03-20 18:27:37,623 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:27:37,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:27:37,623 INFO L85 PathProgramCache]: Analyzing trace with hash 852415808, now seen corresponding path program 8 times [2022-03-20 18:27:37,623 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:27:37,623 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1012212875] [2022-03-20 18:27:37,652 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 18:27:37,652 INFO L85 PathProgramCache]: Analyzing trace with hash -1078790574, now seen corresponding path program 1 times [2022-03-20 18:27:37,652 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:27:37,653 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1687075155] [2022-03-20 18:27:37,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:27:37,653 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:27:37,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:27:37,680 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:27:37,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:27:37,686 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:27:37,686 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:27:37,686 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1687075155] [2022-03-20 18:27:37,686 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1687075155] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:27:37,686 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:27:37,687 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 18:27:37,742 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:27:37,742 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1012212875] [2022-03-20 18:27:37,742 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1012212875] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:27:37,742 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:27:37,742 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-03-20 18:27:37,742 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [782399720] [2022-03-20 18:27:37,743 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:27:37,743 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-20 18:27:37,743 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:27:37,743 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-20 18:27:37,743 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2022-03-20 18:27:37,743 INFO L87 Difference]: Start difference. First operand 28 states and 28 transitions. Second operand has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:27:37,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:27:37,877 INFO L93 Difference]: Finished difference Result 36 states and 36 transitions. [2022-03-20 18:27:37,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-20 18:27:37,877 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 2 states have call successors, (3), 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 27 [2022-03-20 18:27:37,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:27:37,878 INFO L225 Difference]: With dead ends: 36 [2022-03-20 18:27:37,878 INFO L226 Difference]: Without dead ends: 31 [2022-03-20 18:27:37,878 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=57, Invalid=363, Unknown=0, NotChecked=0, Total=420 [2022-03-20 18:27:37,879 INFO L913 BasicCegarLoop]: 11 mSDtfsCounter, 17 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 217 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 228 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 217 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 18:27:37,879 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 58 Invalid, 228 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 217 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 18:27:37,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2022-03-20 18:27:37,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 30. [2022-03-20 18:27:37,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 25 states have (on average 1.04) internal successors, (26), 25 states have internal predecessors, (26), 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) [2022-03-20 18:27:37,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 30 transitions. [2022-03-20 18:27:37,883 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 30 transitions. Word has length 27 [2022-03-20 18:27:37,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:27:37,883 INFO L478 AbstractCegarLoop]: Abstraction has 30 states and 30 transitions. [2022-03-20 18:27:37,883 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:27:37,883 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 30 transitions. [2022-03-20 18:27:37,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-03-20 18:27:37,884 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:27:37,884 INFO L499 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:27:37,884 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-03-20 18:27:37,884 INFO L403 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:27:37,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:27:37,884 INFO L85 PathProgramCache]: Analyzing trace with hash -65166690, now seen corresponding path program 9 times [2022-03-20 18:27:37,884 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:27:37,884 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [302022015] [2022-03-20 18:27:37,913 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 18:27:37,913 INFO L85 PathProgramCache]: Analyzing trace with hash -1019685230, now seen corresponding path program 1 times [2022-03-20 18:27:37,913 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:27:37,913 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1868029905] [2022-03-20 18:27:37,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:27:37,914 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:27:37,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:27:37,940 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:27:37,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:27:37,943 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:27:37,944 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:27:37,944 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1868029905] [2022-03-20 18:27:37,944 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1868029905] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:27:37,944 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:27:37,944 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 18:27:38,006 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:27:38,007 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [302022015] [2022-03-20 18:27:38,007 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [302022015] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:27:38,007 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:27:38,007 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-03-20 18:27:38,007 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1948433239] [2022-03-20 18:27:38,007 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:27:38,007 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-20 18:27:38,007 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:27:38,008 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-20 18:27:38,008 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2022-03-20 18:27:38,008 INFO L87 Difference]: Start difference. First operand 30 states and 30 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 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) [2022-03-20 18:27:38,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:27:38,183 INFO L93 Difference]: Finished difference Result 38 states and 38 transitions. [2022-03-20 18:27:38,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-20 18:27:38,183 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 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 [2022-03-20 18:27:38,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:27:38,184 INFO L225 Difference]: With dead ends: 38 [2022-03-20 18:27:38,184 INFO L226 Difference]: Without dead ends: 33 [2022-03-20 18:27:38,184 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=443, Unknown=0, NotChecked=0, Total=506 [2022-03-20 18:27:38,185 INFO L913 BasicCegarLoop]: 11 mSDtfsCounter, 18 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 261 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 273 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 261 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 18:27:38,185 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 63 Invalid, 273 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 261 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 18:27:38,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2022-03-20 18:27:38,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 32. [2022-03-20 18:27:38,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 27 states have (on average 1.037037037037037) internal successors, (28), 27 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) [2022-03-20 18:27:38,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 32 transitions. [2022-03-20 18:27:38,190 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 32 transitions. Word has length 29 [2022-03-20 18:27:38,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:27:38,190 INFO L478 AbstractCegarLoop]: Abstraction has 32 states and 32 transitions. [2022-03-20 18:27:38,190 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 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) [2022-03-20 18:27:38,190 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 32 transitions. [2022-03-20 18:27:38,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-03-20 18:27:38,191 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:27:38,191 INFO L499 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:27:38,191 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-03-20 18:27:38,191 INFO L403 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:27:38,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:27:38,191 INFO L85 PathProgramCache]: Analyzing trace with hash -1393651588, now seen corresponding path program 10 times [2022-03-20 18:27:38,192 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:27:38,192 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1244195940] [2022-03-20 18:27:38,235 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 18:27:38,235 INFO L85 PathProgramCache]: Analyzing trace with hash -960579886, now seen corresponding path program 1 times [2022-03-20 18:27:38,235 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:27:38,235 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [924834218] [2022-03-20 18:27:38,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:27:38,236 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:27:38,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:27:38,265 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:27:38,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:27:38,275 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:27:38,275 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:27:38,275 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [924834218] [2022-03-20 18:27:38,275 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [924834218] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:27:38,275 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:27:38,275 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 18:27:38,355 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:27:38,356 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1244195940] [2022-03-20 18:27:38,356 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1244195940] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:27:38,356 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:27:38,356 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-03-20 18:27:38,356 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1268946098] [2022-03-20 18:27:38,356 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:27:38,356 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-20 18:27:38,356 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:27:38,357 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-20 18:27:38,357 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=157, Unknown=0, NotChecked=0, Total=182 [2022-03-20 18:27:38,357 INFO L87 Difference]: Start difference. First operand 32 states and 32 transitions. Second operand has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 13 states have internal predecessors, (27), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:27:38,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:27:38,534 INFO L93 Difference]: Finished difference Result 40 states and 40 transitions. [2022-03-20 18:27:38,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-20 18:27:38,535 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 13 states have internal predecessors, (27), 2 states have call successors, (3), 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 31 [2022-03-20 18:27:38,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:27:38,536 INFO L225 Difference]: With dead ends: 40 [2022-03-20 18:27:38,537 INFO L226 Difference]: Without dead ends: 35 [2022-03-20 18:27:38,537 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 16 SyntacticMatches, 4 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=69, Invalid=531, Unknown=0, NotChecked=0, Total=600 [2022-03-20 18:27:38,537 INFO L913 BasicCegarLoop]: 11 mSDtfsCounter, 19 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 309 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 322 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 309 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 18:27:38,538 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 68 Invalid, 322 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 309 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 18:27:38,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2022-03-20 18:27:38,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 34. [2022-03-20 18:27:38,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 29 states have (on average 1.0344827586206897) internal successors, (30), 29 states have internal predecessors, (30), 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) [2022-03-20 18:27:38,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 34 transitions. [2022-03-20 18:27:38,551 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 34 transitions. Word has length 31 [2022-03-20 18:27:38,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:27:38,552 INFO L478 AbstractCegarLoop]: Abstraction has 34 states and 34 transitions. [2022-03-20 18:27:38,552 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 13 states have internal predecessors, (27), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:27:38,552 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 34 transitions. [2022-03-20 18:27:38,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-20 18:27:38,554 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:27:38,554 INFO L499 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:27:38,554 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-03-20 18:27:38,554 INFO L403 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:27:38,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:27:38,554 INFO L85 PathProgramCache]: Analyzing trace with hash 1832615642, now seen corresponding path program 11 times [2022-03-20 18:27:38,554 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:27:38,554 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [763701842] [2022-03-20 18:27:38,580 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 18:27:38,580 INFO L85 PathProgramCache]: Analyzing trace with hash -901474542, now seen corresponding path program 1 times [2022-03-20 18:27:38,580 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:27:38,580 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [842992076] [2022-03-20 18:27:38,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:27:38,581 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:27:38,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:27:38,610 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:27:38,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:27:38,614 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:27:38,614 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:27:38,614 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [842992076] [2022-03-20 18:27:38,615 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [842992076] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:27:38,615 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:27:38,615 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 18:27:38,700 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:27:38,700 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [763701842] [2022-03-20 18:27:38,701 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [763701842] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:27:38,701 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:27:38,701 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-03-20 18:27:38,701 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2115315370] [2022-03-20 18:27:38,701 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:27:38,701 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-20 18:27:38,701 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:27:38,701 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-20 18:27:38,701 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=183, Unknown=0, NotChecked=0, Total=210 [2022-03-20 18:27:38,702 INFO L87 Difference]: Start difference. First operand 34 states and 34 transitions. Second operand has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 14 states have internal predecessors, (29), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:27:38,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:27:38,923 INFO L93 Difference]: Finished difference Result 42 states and 42 transitions. [2022-03-20 18:27:38,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-20 18:27:38,924 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 14 states have internal predecessors, (29), 2 states have call successors, (3), 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 33 [2022-03-20 18:27:38,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:27:38,924 INFO L225 Difference]: With dead ends: 42 [2022-03-20 18:27:38,924 INFO L226 Difference]: Without dead ends: 37 [2022-03-20 18:27:38,925 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 17 SyntacticMatches, 4 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=75, Invalid=627, Unknown=0, NotChecked=0, Total=702 [2022-03-20 18:27:38,925 INFO L913 BasicCegarLoop]: 11 mSDtfsCounter, 20 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 361 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 375 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 361 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 18:27:38,925 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 73 Invalid, 375 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 361 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 18:27:38,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2022-03-20 18:27:38,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 36. [2022-03-20 18:27:38,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 31 states have (on average 1.032258064516129) internal successors, (32), 31 states have internal predecessors, (32), 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) [2022-03-20 18:27:38,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 36 transitions. [2022-03-20 18:27:38,929 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 36 transitions. Word has length 33 [2022-03-20 18:27:38,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:27:38,929 INFO L478 AbstractCegarLoop]: Abstraction has 36 states and 36 transitions. [2022-03-20 18:27:38,929 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 14 states have internal predecessors, (29), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:27:38,929 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 36 transitions. [2022-03-20 18:27:38,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-03-20 18:27:38,930 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:27:38,930 INFO L499 BasicCegarLoop]: trace histogram [12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:27:38,930 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-03-20 18:27:38,930 INFO L403 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:27:38,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:27:38,930 INFO L85 PathProgramCache]: Analyzing trace with hash 1309035960, now seen corresponding path program 12 times [2022-03-20 18:27:38,930 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:27:38,930 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1047141407] [2022-03-20 18:27:38,956 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 18:27:38,956 INFO L85 PathProgramCache]: Analyzing trace with hash -842369198, now seen corresponding path program 1 times [2022-03-20 18:27:38,956 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:27:38,956 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1670434442] [2022-03-20 18:27:38,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:27:38,956 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:27:38,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:27:38,973 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:27:38,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:27:38,978 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:27:38,978 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:27:38,978 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1670434442] [2022-03-20 18:27:38,978 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1670434442] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:27:38,978 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:27:38,978 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 18:27:39,097 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:27:39,097 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1047141407] [2022-03-20 18:27:39,097 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1047141407] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:27:39,097 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:27:39,097 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-03-20 18:27:39,097 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1610099199] [2022-03-20 18:27:39,097 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:27:39,098 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-20 18:27:39,098 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:27:39,098 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-20 18:27:39,098 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=211, Unknown=0, NotChecked=0, Total=240 [2022-03-20 18:27:39,098 INFO L87 Difference]: Start difference. First operand 36 states and 36 transitions. Second operand has 16 states, 16 states have (on average 1.9375) internal successors, (31), 15 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) [2022-03-20 18:27:39,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:27:39,332 INFO L93 Difference]: Finished difference Result 44 states and 44 transitions. [2022-03-20 18:27:39,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-20 18:27:39,333 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 15 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 [2022-03-20 18:27:39,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:27:39,333 INFO L225 Difference]: With dead ends: 44 [2022-03-20 18:27:39,333 INFO L226 Difference]: Without dead ends: 39 [2022-03-20 18:27:39,334 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 15 SyntacticMatches, 7 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=81, Invalid=731, Unknown=0, NotChecked=0, Total=812 [2022-03-20 18:27:39,334 INFO L913 BasicCegarLoop]: 11 mSDtfsCounter, 21 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 417 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 78 SdHoareTripleChecker+Invalid, 432 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 417 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 18:27:39,334 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [21 Valid, 78 Invalid, 432 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 417 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 18:27:39,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2022-03-20 18:27:39,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 38. [2022-03-20 18:27:39,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 33 states have (on average 1.0303030303030303) internal successors, (34), 33 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) [2022-03-20 18:27:39,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 38 transitions. [2022-03-20 18:27:39,338 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 38 transitions. Word has length 35 [2022-03-20 18:27:39,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:27:39,338 INFO L478 AbstractCegarLoop]: Abstraction has 38 states and 38 transitions. [2022-03-20 18:27:39,338 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 15 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) [2022-03-20 18:27:39,338 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 38 transitions. [2022-03-20 18:27:39,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-03-20 18:27:39,338 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:27:39,339 INFO L499 BasicCegarLoop]: trace histogram [13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:27:39,339 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-03-20 18:27:39,339 INFO L403 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:27:39,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:27:39,339 INFO L85 PathProgramCache]: Analyzing trace with hash 660135190, now seen corresponding path program 13 times [2022-03-20 18:27:39,339 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:27:39,339 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [646921804] [2022-03-20 18:27:39,369 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 18:27:39,369 INFO L85 PathProgramCache]: Analyzing trace with hash -783263854, now seen corresponding path program 1 times [2022-03-20 18:27:39,370 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:27:39,370 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [746238165] [2022-03-20 18:27:39,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:27:39,370 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:27:39,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:27:39,388 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:27:39,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:27:39,391 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:27:39,392 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:27:39,392 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [746238165] [2022-03-20 18:27:39,392 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [746238165] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:27:39,392 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:27:39,392 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 18:27:39,519 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:27:39,519 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [646921804] [2022-03-20 18:27:39,519 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [646921804] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:27:39,519 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:27:39,519 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-03-20 18:27:39,519 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1214927844] [2022-03-20 18:27:39,519 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:27:39,520 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-20 18:27:39,520 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:27:39,521 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-20 18:27:39,521 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=241, Unknown=0, NotChecked=0, Total=272 [2022-03-20 18:27:39,521 INFO L87 Difference]: Start difference. First operand 38 states and 38 transitions. Second operand has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 16 states have internal predecessors, (33), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:27:39,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:27:39,800 INFO L93 Difference]: Finished difference Result 46 states and 46 transitions. [2022-03-20 18:27:39,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-20 18:27:39,801 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 16 states have internal predecessors, (33), 2 states have call successors, (3), 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 37 [2022-03-20 18:27:39,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:27:39,801 INFO L225 Difference]: With dead ends: 46 [2022-03-20 18:27:39,801 INFO L226 Difference]: Without dead ends: 41 [2022-03-20 18:27:39,802 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 17 SyntacticMatches, 6 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=87, Invalid=843, Unknown=0, NotChecked=0, Total=930 [2022-03-20 18:27:39,802 INFO L913 BasicCegarLoop]: 11 mSDtfsCounter, 22 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 477 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 83 SdHoareTripleChecker+Invalid, 493 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 477 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 18:27:39,802 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 83 Invalid, 493 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 477 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-20 18:27:39,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2022-03-20 18:27:39,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 40. [2022-03-20 18:27:39,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 35 states have (on average 1.0285714285714285) internal successors, (36), 35 states have internal predecessors, (36), 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) [2022-03-20 18:27:39,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 40 transitions. [2022-03-20 18:27:39,806 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 40 transitions. Word has length 37 [2022-03-20 18:27:39,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:27:39,806 INFO L478 AbstractCegarLoop]: Abstraction has 40 states and 40 transitions. [2022-03-20 18:27:39,806 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 16 states have internal predecessors, (33), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:27:39,806 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 40 transitions. [2022-03-20 18:27:39,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-03-20 18:27:39,807 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:27:39,807 INFO L499 BasicCegarLoop]: trace histogram [14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:27:39,807 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-03-20 18:27:39,807 INFO L403 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:27:39,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:27:39,807 INFO L85 PathProgramCache]: Analyzing trace with hash -163246860, now seen corresponding path program 14 times [2022-03-20 18:27:39,807 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:27:39,807 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1038399477] [2022-03-20 18:27:39,830 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 18:27:39,830 INFO L85 PathProgramCache]: Analyzing trace with hash -724158510, now seen corresponding path program 1 times [2022-03-20 18:27:39,830 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:27:39,830 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2083966737] [2022-03-20 18:27:39,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:27:39,830 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:27:39,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:27:39,843 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:27:39,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:27:39,846 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:27:39,846 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:27:39,846 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2083966737] [2022-03-20 18:27:39,846 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2083966737] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:27:39,846 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:27:39,846 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 18:27:39,975 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:27:39,975 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1038399477] [2022-03-20 18:27:39,975 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1038399477] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:27:39,975 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:27:39,975 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-03-20 18:27:39,975 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2126579521] [2022-03-20 18:27:39,975 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:27:39,976 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-20 18:27:39,976 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:27:39,976 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-20 18:27:39,976 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=273, Unknown=0, NotChecked=0, Total=306 [2022-03-20 18:27:39,976 INFO L87 Difference]: Start difference. First operand 40 states and 40 transitions. Second operand has 18 states, 18 states have (on average 1.9444444444444444) internal successors, (35), 17 states have internal predecessors, (35), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:27:40,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:27:40,267 INFO L93 Difference]: Finished difference Result 48 states and 48 transitions. [2022-03-20 18:27:40,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-03-20 18:27:40,267 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.9444444444444444) internal successors, (35), 17 states have internal predecessors, (35), 2 states have call successors, (3), 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 39 [2022-03-20 18:27:40,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:27:40,268 INFO L225 Difference]: With dead ends: 48 [2022-03-20 18:27:40,268 INFO L226 Difference]: Without dead ends: 43 [2022-03-20 18:27:40,268 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 18 SyntacticMatches, 6 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=93, Invalid=963, Unknown=0, NotChecked=0, Total=1056 [2022-03-20 18:27:40,269 INFO L913 BasicCegarLoop]: 11 mSDtfsCounter, 23 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 541 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 88 SdHoareTripleChecker+Invalid, 558 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 541 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 18:27:40,269 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 88 Invalid, 558 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 541 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-20 18:27:40,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2022-03-20 18:27:40,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 42. [2022-03-20 18:27:40,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 37 states have (on average 1.027027027027027) internal successors, (38), 37 states have internal predecessors, (38), 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) [2022-03-20 18:27:40,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 42 transitions. [2022-03-20 18:27:40,273 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 42 transitions. Word has length 39 [2022-03-20 18:27:40,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:27:40,273 INFO L478 AbstractCegarLoop]: Abstraction has 42 states and 42 transitions. [2022-03-20 18:27:40,273 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.9444444444444444) internal successors, (35), 17 states have internal predecessors, (35), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:27:40,273 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 42 transitions. [2022-03-20 18:27:40,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-03-20 18:27:40,274 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:27:40,274 INFO L499 BasicCegarLoop]: trace histogram [15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:27:40,274 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-03-20 18:27:40,274 INFO L403 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:27:40,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:27:40,274 INFO L85 PathProgramCache]: Analyzing trace with hash -1159414446, now seen corresponding path program 15 times [2022-03-20 18:27:40,274 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:27:40,274 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1749815020] [2022-03-20 18:27:40,301 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 18:27:40,301 INFO L85 PathProgramCache]: Analyzing trace with hash -665053166, now seen corresponding path program 1 times [2022-03-20 18:27:40,301 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:27:40,301 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [232186612] [2022-03-20 18:27:40,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:27:40,302 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:27:40,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:27:40,317 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:27:40,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:27:40,324 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:27:40,324 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:27:40,324 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [232186612] [2022-03-20 18:27:40,325 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [232186612] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:27:40,325 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:27:40,325 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 18:27:40,488 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:27:40,489 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1749815020] [2022-03-20 18:27:40,489 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1749815020] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:27:40,489 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:27:40,489 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-03-20 18:27:40,489 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1861967262] [2022-03-20 18:27:40,489 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:27:40,489 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-20 18:27:40,489 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:27:40,490 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-20 18:27:40,490 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=307, Unknown=0, NotChecked=0, Total=342 [2022-03-20 18:27:40,490 INFO L87 Difference]: Start difference. First operand 42 states and 42 transitions. Second operand has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 18 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) [2022-03-20 18:27:40,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:27:40,802 INFO L93 Difference]: Finished difference Result 50 states and 50 transitions. [2022-03-20 18:27:40,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-03-20 18:27:40,802 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 18 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 [2022-03-20 18:27:40,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:27:40,803 INFO L225 Difference]: With dead ends: 50 [2022-03-20 18:27:40,803 INFO L226 Difference]: Without dead ends: 45 [2022-03-20 18:27:40,803 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 20 SyntacticMatches, 5 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=99, Invalid=1091, Unknown=0, NotChecked=0, Total=1190 [2022-03-20 18:27:40,804 INFO L913 BasicCegarLoop]: 11 mSDtfsCounter, 24 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 609 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 93 SdHoareTripleChecker+Invalid, 627 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 609 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 18:27:40,804 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [24 Valid, 93 Invalid, 627 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 609 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-20 18:27:40,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2022-03-20 18:27:40,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 44. [2022-03-20 18:27:40,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 39 states have (on average 1.0256410256410255) internal successors, (40), 39 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) [2022-03-20 18:27:40,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 44 transitions. [2022-03-20 18:27:40,808 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 44 transitions. Word has length 41 [2022-03-20 18:27:40,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:27:40,808 INFO L478 AbstractCegarLoop]: Abstraction has 44 states and 44 transitions. [2022-03-20 18:27:40,808 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 18 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) [2022-03-20 18:27:40,808 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 44 transitions. [2022-03-20 18:27:40,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-03-20 18:27:40,808 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:27:40,808 INFO L499 BasicCegarLoop]: trace histogram [16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:27:40,809 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-03-20 18:27:40,809 INFO L403 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:27:40,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:27:40,809 INFO L85 PathProgramCache]: Analyzing trace with hash -698757584, now seen corresponding path program 16 times [2022-03-20 18:27:40,809 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:27:40,809 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1219925245] [2022-03-20 18:27:40,838 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 18:27:40,839 INFO L85 PathProgramCache]: Analyzing trace with hash -605947822, now seen corresponding path program 1 times [2022-03-20 18:27:40,839 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:27:40,839 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1813191712] [2022-03-20 18:27:40,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:27:40,839 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:27:40,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:27:40,852 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:27:40,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:27:40,855 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:27:40,855 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:27:40,855 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1813191712] [2022-03-20 18:27:40,855 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1813191712] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:27:40,855 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:27:40,856 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 18:27:41,013 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:27:41,013 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1219925245] [2022-03-20 18:27:41,013 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1219925245] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:27:41,013 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:27:41,013 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-03-20 18:27:41,013 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [461734292] [2022-03-20 18:27:41,013 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:27:41,014 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-20 18:27:41,014 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:27:41,014 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-20 18:27:41,014 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=343, Unknown=0, NotChecked=0, Total=380 [2022-03-20 18:27:41,014 INFO L87 Difference]: Start difference. First operand 44 states and 44 transitions. Second operand has 20 states, 20 states have (on average 1.95) internal successors, (39), 19 states have internal predecessors, (39), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:27:41,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:27:41,407 INFO L93 Difference]: Finished difference Result 52 states and 52 transitions. [2022-03-20 18:27:41,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-03-20 18:27:41,408 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.95) internal successors, (39), 19 states have internal predecessors, (39), 2 states have call successors, (3), 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 43 [2022-03-20 18:27:41,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:27:41,408 INFO L225 Difference]: With dead ends: 52 [2022-03-20 18:27:41,408 INFO L226 Difference]: Without dead ends: 47 [2022-03-20 18:27:41,409 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 20 SyntacticMatches, 6 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=105, Invalid=1227, Unknown=0, NotChecked=0, Total=1332 [2022-03-20 18:27:41,409 INFO L913 BasicCegarLoop]: 11 mSDtfsCounter, 25 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 681 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 98 SdHoareTripleChecker+Invalid, 700 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 681 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 18:27:41,409 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [25 Valid, 98 Invalid, 700 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 681 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-20 18:27:41,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2022-03-20 18:27:41,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 46. [2022-03-20 18:27:41,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 41 states have (on average 1.024390243902439) internal successors, (42), 41 states have internal predecessors, (42), 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) [2022-03-20 18:27:41,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 46 transitions. [2022-03-20 18:27:41,413 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 46 transitions. Word has length 43 [2022-03-20 18:27:41,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:27:41,414 INFO L478 AbstractCegarLoop]: Abstraction has 46 states and 46 transitions. [2022-03-20 18:27:41,414 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.95) internal successors, (39), 19 states have internal predecessors, (39), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:27:41,414 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 46 transitions. [2022-03-20 18:27:41,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-03-20 18:27:41,414 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:27:41,414 INFO L499 BasicCegarLoop]: trace histogram [17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:27:41,414 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-03-20 18:27:41,414 INFO L403 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:27:41,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:27:41,414 INFO L85 PathProgramCache]: Analyzing trace with hash -389144690, now seen corresponding path program 17 times [2022-03-20 18:27:41,415 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:27:41,415 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1525475363] [2022-03-20 18:27:41,438 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 18:27:41,438 INFO L85 PathProgramCache]: Analyzing trace with hash -546842478, now seen corresponding path program 1 times [2022-03-20 18:27:41,439 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:27:41,439 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1329076298] [2022-03-20 18:27:41,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:27:41,439 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:27:41,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:27:41,463 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:27:41,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:27:41,466 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:27:41,466 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:27:41,466 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1329076298] [2022-03-20 18:27:41,466 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1329076298] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:27:41,466 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:27:41,466 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 18:27:41,628 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:27:41,628 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1525475363] [2022-03-20 18:27:41,628 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1525475363] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:27:41,628 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:27:41,628 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2022-03-20 18:27:41,628 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [778772275] [2022-03-20 18:27:41,628 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:27:41,628 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-20 18:27:41,628 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:27:41,629 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-20 18:27:41,629 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=381, Unknown=0, NotChecked=0, Total=420 [2022-03-20 18:27:41,629 INFO L87 Difference]: Start difference. First operand 46 states and 46 transitions. Second operand has 21 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 20 states have internal predecessors, (41), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:27:42,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:27:42,013 INFO L93 Difference]: Finished difference Result 54 states and 54 transitions. [2022-03-20 18:27:42,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-03-20 18:27:42,014 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 20 states have internal predecessors, (41), 2 states have call successors, (3), 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 45 [2022-03-20 18:27:42,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:27:42,014 INFO L225 Difference]: With dead ends: 54 [2022-03-20 18:27:42,014 INFO L226 Difference]: Without dead ends: 49 [2022-03-20 18:27:42,015 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 22 SyntacticMatches, 5 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=111, Invalid=1371, Unknown=0, NotChecked=0, Total=1482 [2022-03-20 18:27:42,015 INFO L913 BasicCegarLoop]: 11 mSDtfsCounter, 26 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 757 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 103 SdHoareTripleChecker+Invalid, 777 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 757 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 18:27:42,015 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [26 Valid, 103 Invalid, 777 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 757 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-20 18:27:42,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2022-03-20 18:27:42,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 48. [2022-03-20 18:27:42,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 43 states have (on average 1.0232558139534884) internal successors, (44), 43 states have internal predecessors, (44), 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) [2022-03-20 18:27:42,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 48 transitions. [2022-03-20 18:27:42,020 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 48 transitions. Word has length 45 [2022-03-20 18:27:42,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:27:42,020 INFO L478 AbstractCegarLoop]: Abstraction has 48 states and 48 transitions. [2022-03-20 18:27:42,020 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 20 states have internal predecessors, (41), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:27:42,020 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 48 transitions. [2022-03-20 18:27:42,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-03-20 18:27:42,020 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:27:42,020 INFO L499 BasicCegarLoop]: trace histogram [18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:27:42,020 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-03-20 18:27:42,020 INFO L403 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:27:42,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:27:42,021 INFO L85 PathProgramCache]: Analyzing trace with hash 796103020, now seen corresponding path program 18 times [2022-03-20 18:27:42,021 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:27:42,021 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2014155667] [2022-03-20 18:27:42,052 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 18:27:42,052 INFO L85 PathProgramCache]: Analyzing trace with hash -487737134, now seen corresponding path program 1 times [2022-03-20 18:27:42,052 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:27:42,052 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1642892326] [2022-03-20 18:27:42,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:27:42,052 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:27:42,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:27:42,065 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:27:42,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:27:42,068 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:27:42,068 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:27:42,068 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1642892326] [2022-03-20 18:27:42,068 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1642892326] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:27:42,068 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:27:42,068 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 18:27:42,240 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:27:42,241 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2014155667] [2022-03-20 18:27:42,241 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2014155667] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:27:42,241 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:27:42,241 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2022-03-20 18:27:42,241 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1687760017] [2022-03-20 18:27:42,241 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:27:42,241 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-20 18:27:42,241 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:27:42,241 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-20 18:27:42,242 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=421, Unknown=0, NotChecked=0, Total=462 [2022-03-20 18:27:42,242 INFO L87 Difference]: Start difference. First operand 48 states and 48 transitions. Second operand has 22 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 21 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) [2022-03-20 18:27:42,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:27:42,663 INFO L93 Difference]: Finished difference Result 56 states and 56 transitions. [2022-03-20 18:27:42,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-03-20 18:27:42,663 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 21 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 [2022-03-20 18:27:42,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:27:42,664 INFO L225 Difference]: With dead ends: 56 [2022-03-20 18:27:42,664 INFO L226 Difference]: Without dead ends: 51 [2022-03-20 18:27:42,664 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 22 SyntacticMatches, 6 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 171 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=117, Invalid=1523, Unknown=0, NotChecked=0, Total=1640 [2022-03-20 18:27:42,665 INFO L913 BasicCegarLoop]: 11 mSDtfsCounter, 27 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 837 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 108 SdHoareTripleChecker+Invalid, 858 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 837 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 18:27:42,665 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [27 Valid, 108 Invalid, 858 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 837 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-20 18:27:42,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2022-03-20 18:27:42,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 50. [2022-03-20 18:27:42,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 45 states have (on average 1.0222222222222221) internal successors, (46), 45 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) [2022-03-20 18:27:42,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 50 transitions. [2022-03-20 18:27:42,669 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 50 transitions. Word has length 47 [2022-03-20 18:27:42,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:27:42,669 INFO L478 AbstractCegarLoop]: Abstraction has 50 states and 50 transitions. [2022-03-20 18:27:42,669 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 21 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) [2022-03-20 18:27:42,670 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 50 transitions. [2022-03-20 18:27:42,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-03-20 18:27:42,670 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:27:42,670 INFO L499 BasicCegarLoop]: trace histogram [19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:27:42,670 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-03-20 18:27:42,670 INFO L403 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:27:42,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:27:42,670 INFO L85 PathProgramCache]: Analyzing trace with hash 1652818890, now seen corresponding path program 19 times [2022-03-20 18:27:42,670 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:27:42,670 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [66138475] [2022-03-20 18:27:42,694 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 18:27:42,694 INFO L85 PathProgramCache]: Analyzing trace with hash -428631790, now seen corresponding path program 1 times [2022-03-20 18:27:42,694 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:27:42,694 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1071891467] [2022-03-20 18:27:42,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:27:42,694 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:27:42,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:27:42,715 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:27:42,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:27:42,721 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:27:42,721 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:27:42,721 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1071891467] [2022-03-20 18:27:42,721 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1071891467] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:27:42,721 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:27:42,721 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 18:27:42,949 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:27:42,950 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [66138475] [2022-03-20 18:27:42,950 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [66138475] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:27:42,950 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:27:42,950 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2022-03-20 18:27:42,950 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1594973065] [2022-03-20 18:27:42,950 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:27:42,950 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-03-20 18:27:42,950 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:27:42,950 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-03-20 18:27:42,951 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=463, Unknown=0, NotChecked=0, Total=506 [2022-03-20 18:27:42,951 INFO L87 Difference]: Start difference. First operand 50 states and 50 transitions. Second operand has 23 states, 23 states have (on average 1.9565217391304348) internal successors, (45), 22 states have internal predecessors, (45), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:27:43,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:27:43,407 INFO L93 Difference]: Finished difference Result 58 states and 58 transitions. [2022-03-20 18:27:43,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-03-20 18:27:43,407 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9565217391304348) internal successors, (45), 22 states have internal predecessors, (45), 2 states have call successors, (3), 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 49 [2022-03-20 18:27:43,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:27:43,407 INFO L225 Difference]: With dead ends: 58 [2022-03-20 18:27:43,407 INFO L226 Difference]: Without dead ends: 53 [2022-03-20 18:27:43,408 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 22 SyntacticMatches, 7 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=123, Invalid=1683, Unknown=0, NotChecked=0, Total=1806 [2022-03-20 18:27:43,409 INFO L913 BasicCegarLoop]: 11 mSDtfsCounter, 28 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 921 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 113 SdHoareTripleChecker+Invalid, 943 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 921 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-20 18:27:43,409 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 113 Invalid, 943 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 921 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-20 18:27:43,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2022-03-20 18:27:43,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 52. [2022-03-20 18:27:43,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 47 states have (on average 1.0212765957446808) internal successors, (48), 47 states have internal predecessors, (48), 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) [2022-03-20 18:27:43,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 52 transitions. [2022-03-20 18:27:43,418 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 52 transitions. Word has length 49 [2022-03-20 18:27:43,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:27:43,419 INFO L478 AbstractCegarLoop]: Abstraction has 52 states and 52 transitions. [2022-03-20 18:27:43,419 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.9565217391304348) internal successors, (45), 22 states have internal predecessors, (45), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:27:43,419 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 52 transitions. [2022-03-20 18:27:43,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-03-20 18:27:43,419 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:27:43,419 INFO L499 BasicCegarLoop]: trace histogram [20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:27:43,419 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-03-20 18:27:43,420 INFO L403 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:27:43,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:27:43,420 INFO L85 PathProgramCache]: Analyzing trace with hash 323049128, now seen corresponding path program 20 times [2022-03-20 18:27:43,420 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:27:43,420 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1668665699] [2022-03-20 18:27:43,446 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 18:27:43,447 INFO L85 PathProgramCache]: Analyzing trace with hash -369526446, now seen corresponding path program 1 times [2022-03-20 18:27:43,447 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:27:43,447 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1514613874] [2022-03-20 18:27:43,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:27:43,447 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:27:43,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:27:43,461 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:27:43,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:27:43,464 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:27:43,464 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:27:43,464 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1514613874] [2022-03-20 18:27:43,464 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1514613874] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:27:43,465 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:27:43,465 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 18:27:43,701 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:27:43,701 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1668665699] [2022-03-20 18:27:43,702 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1668665699] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:27:43,702 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:27:43,702 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2022-03-20 18:27:43,702 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [980348462] [2022-03-20 18:27:43,702 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:27:43,702 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-20 18:27:43,702 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:27:43,702 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-20 18:27:43,702 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=507, Unknown=0, NotChecked=0, Total=552 [2022-03-20 18:27:43,703 INFO L87 Difference]: Start difference. First operand 52 states and 52 transitions. Second operand has 24 states, 24 states have (on average 1.9583333333333333) internal successors, (47), 23 states have internal predecessors, (47), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:27:44,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:27:44,194 INFO L93 Difference]: Finished difference Result 60 states and 60 transitions. [2022-03-20 18:27:44,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-03-20 18:27:44,195 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.9583333333333333) internal successors, (47), 23 states have internal predecessors, (47), 2 states have call successors, (3), 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 51 [2022-03-20 18:27:44,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:27:44,195 INFO L225 Difference]: With dead ends: 60 [2022-03-20 18:27:44,195 INFO L226 Difference]: Without dead ends: 55 [2022-03-20 18:27:44,196 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 22 SyntacticMatches, 8 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 210 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=129, Invalid=1851, Unknown=0, NotChecked=0, Total=1980 [2022-03-20 18:27:44,196 INFO L913 BasicCegarLoop]: 11 mSDtfsCounter, 29 mSDsluCounter, 107 mSDsCounter, 0 mSdLazyCounter, 1009 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 118 SdHoareTripleChecker+Invalid, 1032 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 1009 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-20 18:27:44,196 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 118 Invalid, 1032 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 1009 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-20 18:27:44,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2022-03-20 18:27:44,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 54. [2022-03-20 18:27:44,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 49 states have (on average 1.0204081632653061) internal successors, (50), 49 states have internal predecessors, (50), 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) [2022-03-20 18:27:44,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 54 transitions. [2022-03-20 18:27:44,201 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 54 transitions. Word has length 51 [2022-03-20 18:27:44,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:27:44,201 INFO L478 AbstractCegarLoop]: Abstraction has 54 states and 54 transitions. [2022-03-20 18:27:44,201 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.9583333333333333) internal successors, (47), 23 states have internal predecessors, (47), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:27:44,201 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 54 transitions. [2022-03-20 18:27:44,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-03-20 18:27:44,202 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:27:44,202 INFO L499 BasicCegarLoop]: trace histogram [21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:27:44,202 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2022-03-20 18:27:44,202 INFO L403 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:27:44,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:27:44,202 INFO L85 PathProgramCache]: Analyzing trace with hash -1980405242, now seen corresponding path program 21 times [2022-03-20 18:27:44,202 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:27:44,202 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [718844982] [2022-03-20 18:27:44,223 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 18:27:44,224 INFO L85 PathProgramCache]: Analyzing trace with hash -310421102, now seen corresponding path program 1 times [2022-03-20 18:27:44,224 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:27:44,224 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1127109891] [2022-03-20 18:27:44,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:27:44,224 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:27:44,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:27:44,251 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:27:44,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:27:44,255 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:27:44,255 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:27:44,255 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1127109891] [2022-03-20 18:27:44,255 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1127109891] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:27:44,256 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:27:44,256 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 18:27:44,489 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:27:44,489 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [718844982] [2022-03-20 18:27:44,490 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [718844982] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:27:44,490 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:27:44,490 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2022-03-20 18:27:44,490 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1453542273] [2022-03-20 18:27:44,490 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:27:44,490 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-20 18:27:44,490 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:27:44,490 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-20 18:27:44,490 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=553, Unknown=0, NotChecked=0, Total=600 [2022-03-20 18:27:44,491 INFO L87 Difference]: Start difference. First operand 54 states and 54 transitions. Second operand has 25 states, 25 states have (on average 1.96) internal successors, (49), 24 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) [2022-03-20 18:27:44,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:27:44,983 INFO L93 Difference]: Finished difference Result 62 states and 62 transitions. [2022-03-20 18:27:44,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-03-20 18:27:44,985 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.96) internal successors, (49), 24 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 [2022-03-20 18:27:44,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:27:44,986 INFO L225 Difference]: With dead ends: 62 [2022-03-20 18:27:44,986 INFO L226 Difference]: Without dead ends: 57 [2022-03-20 18:27:44,986 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 21 SyntacticMatches, 10 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 231 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=135, Invalid=2027, Unknown=0, NotChecked=0, Total=2162 [2022-03-20 18:27:44,987 INFO L913 BasicCegarLoop]: 11 mSDtfsCounter, 30 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 1101 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 123 SdHoareTripleChecker+Invalid, 1125 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 1101 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-20 18:27:44,987 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [30 Valid, 123 Invalid, 1125 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 1101 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-20 18:27:44,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2022-03-20 18:27:44,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 56. [2022-03-20 18:27:44,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 51 states have (on average 1.0196078431372548) internal successors, (52), 51 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) [2022-03-20 18:27:44,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 56 transitions. [2022-03-20 18:27:44,992 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 56 transitions. Word has length 53 [2022-03-20 18:27:44,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:27:44,992 INFO L478 AbstractCegarLoop]: Abstraction has 56 states and 56 transitions. [2022-03-20 18:27:44,992 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.96) internal successors, (49), 24 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) [2022-03-20 18:27:44,992 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 56 transitions. [2022-03-20 18:27:44,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-03-20 18:27:44,992 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:27:44,993 INFO L499 BasicCegarLoop]: trace histogram [22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:27:44,993 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2022-03-20 18:27:44,993 INFO L403 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:27:44,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:27:44,993 INFO L85 PathProgramCache]: Analyzing trace with hash 603069924, now seen corresponding path program 22 times [2022-03-20 18:27:44,993 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:27:44,993 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [776660898] [2022-03-20 18:27:45,023 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 18:27:45,023 INFO L85 PathProgramCache]: Analyzing trace with hash -251315758, now seen corresponding path program 1 times [2022-03-20 18:27:45,023 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:27:45,023 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1512868562] [2022-03-20 18:27:45,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:27:45,024 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:27:45,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:27:45,042 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:27:45,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:27:45,046 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:27:45,046 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:27:45,046 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1512868562] [2022-03-20 18:27:45,046 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1512868562] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:27:45,046 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:27:45,046 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 18:27:45,327 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:27:45,328 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [776660898] [2022-03-20 18:27:45,328 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [776660898] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:27:45,328 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:27:45,328 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [26] imperfect sequences [] total 26 [2022-03-20 18:27:45,328 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1126648404] [2022-03-20 18:27:45,328 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:27:45,328 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-20 18:27:45,328 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:27:45,328 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-20 18:27:45,329 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=601, Unknown=0, NotChecked=0, Total=650 [2022-03-20 18:27:45,329 INFO L87 Difference]: Start difference. First operand 56 states and 56 transitions. Second operand has 26 states, 26 states have (on average 1.9615384615384615) internal successors, (51), 25 states have internal predecessors, (51), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:27:45,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:27:45,901 INFO L93 Difference]: Finished difference Result 64 states and 64 transitions. [2022-03-20 18:27:45,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-03-20 18:27:45,902 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.9615384615384615) internal successors, (51), 25 states have internal predecessors, (51), 2 states have call successors, (3), 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 55 [2022-03-20 18:27:45,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:27:45,902 INFO L225 Difference]: With dead ends: 64 [2022-03-20 18:27:45,902 INFO L226 Difference]: Without dead ends: 59 [2022-03-20 18:27:45,903 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 22 SyntacticMatches, 10 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 253 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=141, Invalid=2211, Unknown=0, NotChecked=0, Total=2352 [2022-03-20 18:27:45,903 INFO L913 BasicCegarLoop]: 11 mSDtfsCounter, 31 mSDsluCounter, 117 mSDsCounter, 0 mSdLazyCounter, 1197 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 128 SdHoareTripleChecker+Invalid, 1222 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 1197 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-20 18:27:45,903 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 128 Invalid, 1222 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 1197 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-20 18:27:45,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2022-03-20 18:27:45,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 58. [2022-03-20 18:27:45,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 53 states have (on average 1.0188679245283019) internal successors, (54), 53 states have internal predecessors, (54), 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) [2022-03-20 18:27:45,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 58 transitions. [2022-03-20 18:27:45,908 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 58 transitions. Word has length 55 [2022-03-20 18:27:45,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:27:45,909 INFO L478 AbstractCegarLoop]: Abstraction has 58 states and 58 transitions. [2022-03-20 18:27:45,909 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.9615384615384615) internal successors, (51), 25 states have internal predecessors, (51), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:27:45,909 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 58 transitions. [2022-03-20 18:27:45,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-03-20 18:27:45,909 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:27:45,909 INFO L499 BasicCegarLoop]: trace histogram [23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:27:45,909 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2022-03-20 18:27:45,909 INFO L403 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:27:45,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:27:45,910 INFO L85 PathProgramCache]: Analyzing trace with hash 831607362, now seen corresponding path program 23 times [2022-03-20 18:27:45,910 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:27:45,910 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [176838444] [2022-03-20 18:27:45,936 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 18:27:45,936 INFO L85 PathProgramCache]: Analyzing trace with hash -192210414, now seen corresponding path program 1 times [2022-03-20 18:27:45,936 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:27:45,936 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1537948143] [2022-03-20 18:27:45,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:27:45,937 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:27:45,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:27:45,951 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:27:45,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:27:45,955 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:27:45,955 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:27:45,955 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1537948143] [2022-03-20 18:27:45,955 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1537948143] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:27:45,955 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:27:45,955 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 18:27:46,219 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:27:46,219 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [176838444] [2022-03-20 18:27:46,220 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [176838444] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:27:46,220 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:27:46,220 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [27] imperfect sequences [] total 27 [2022-03-20 18:27:46,220 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1700287811] [2022-03-20 18:27:46,220 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:27:46,220 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-03-20 18:27:46,220 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:27:46,220 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-03-20 18:27:46,220 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=651, Unknown=0, NotChecked=0, Total=702 [2022-03-20 18:27:46,221 INFO L87 Difference]: Start difference. First operand 58 states and 58 transitions. Second operand has 27 states, 27 states have (on average 1.962962962962963) internal successors, (53), 26 states have internal predecessors, (53), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:27:46,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:27:46,782 INFO L93 Difference]: Finished difference Result 66 states and 66 transitions. [2022-03-20 18:27:46,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-03-20 18:27:46,783 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.962962962962963) internal successors, (53), 26 states have internal predecessors, (53), 2 states have call successors, (3), 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 57 [2022-03-20 18:27:46,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:27:46,783 INFO L225 Difference]: With dead ends: 66 [2022-03-20 18:27:46,783 INFO L226 Difference]: Without dead ends: 61 [2022-03-20 18:27:46,784 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 27 SyntacticMatches, 6 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 276 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=147, Invalid=2403, Unknown=0, NotChecked=0, Total=2550 [2022-03-20 18:27:46,784 INFO L913 BasicCegarLoop]: 11 mSDtfsCounter, 32 mSDsluCounter, 122 mSDsCounter, 0 mSdLazyCounter, 1297 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 133 SdHoareTripleChecker+Invalid, 1323 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 1297 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-20 18:27:46,785 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [32 Valid, 133 Invalid, 1323 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 1297 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-20 18:27:46,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2022-03-20 18:27:46,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 60. [2022-03-20 18:27:46,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 55 states have (on average 1.018181818181818) internal successors, (56), 55 states have internal predecessors, (56), 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) [2022-03-20 18:27:46,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 60 transitions. [2022-03-20 18:27:46,790 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 60 transitions. Word has length 57 [2022-03-20 18:27:46,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:27:46,790 INFO L478 AbstractCegarLoop]: Abstraction has 60 states and 60 transitions. [2022-03-20 18:27:46,790 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.962962962962963) internal successors, (53), 26 states have internal predecessors, (53), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:27:46,791 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 60 transitions. [2022-03-20 18:27:46,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-03-20 18:27:46,791 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:27:46,791 INFO L499 BasicCegarLoop]: trace histogram [24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:27:46,791 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2022-03-20 18:27:46,791 INFO L403 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:27:46,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:27:46,791 INFO L85 PathProgramCache]: Analyzing trace with hash 1412753184, now seen corresponding path program 24 times [2022-03-20 18:27:46,791 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:27:46,791 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1147306817] [2022-03-20 18:27:46,824 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 18:27:46,824 INFO L85 PathProgramCache]: Analyzing trace with hash -133105070, now seen corresponding path program 1 times [2022-03-20 18:27:46,824 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:27:46,824 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1958868015] [2022-03-20 18:27:46,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:27:46,825 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:27:46,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:27:46,844 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:27:46,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:27:46,851 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:27:46,851 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:27:46,851 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1958868015] [2022-03-20 18:27:46,851 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1958868015] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:27:46,851 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:27:46,851 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 18:27:47,184 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:27:47,184 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1147306817] [2022-03-20 18:27:47,184 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1147306817] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:27:47,184 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:27:47,185 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [28] imperfect sequences [] total 28 [2022-03-20 18:27:47,185 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [412217631] [2022-03-20 18:27:47,185 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:27:47,185 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-03-20 18:27:47,185 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:27:47,185 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-03-20 18:27:47,185 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=703, Unknown=0, NotChecked=0, Total=756 [2022-03-20 18:27:47,186 INFO L87 Difference]: Start difference. First operand 60 states and 60 transitions. Second operand has 28 states, 28 states have (on average 1.9642857142857142) internal successors, (55), 27 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) [2022-03-20 18:27:47,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:27:47,833 INFO L93 Difference]: Finished difference Result 68 states and 68 transitions. [2022-03-20 18:27:47,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-03-20 18:27:47,833 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.9642857142857142) internal successors, (55), 27 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 [2022-03-20 18:27:47,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:27:47,834 INFO L225 Difference]: With dead ends: 68 [2022-03-20 18:27:47,834 INFO L226 Difference]: Without dead ends: 63 [2022-03-20 18:27:47,834 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 23 SyntacticMatches, 11 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 300 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=153, Invalid=2603, Unknown=0, NotChecked=0, Total=2756 [2022-03-20 18:27:47,835 INFO L913 BasicCegarLoop]: 11 mSDtfsCounter, 33 mSDsluCounter, 127 mSDsCounter, 0 mSdLazyCounter, 1401 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 138 SdHoareTripleChecker+Invalid, 1428 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 1401 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-20 18:27:47,835 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [33 Valid, 138 Invalid, 1428 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 1401 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-20 18:27:47,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2022-03-20 18:27:47,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 62. [2022-03-20 18:27:47,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 57 states have (on average 1.0175438596491229) internal successors, (58), 57 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) [2022-03-20 18:27:47,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 62 transitions. [2022-03-20 18:27:47,841 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 62 transitions. Word has length 59 [2022-03-20 18:27:47,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:27:47,841 INFO L478 AbstractCegarLoop]: Abstraction has 62 states and 62 transitions. [2022-03-20 18:27:47,842 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.9642857142857142) internal successors, (55), 27 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) [2022-03-20 18:27:47,842 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 62 transitions. [2022-03-20 18:27:47,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-03-20 18:27:47,842 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:27:47,842 INFO L499 BasicCegarLoop]: trace histogram [25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:27:47,842 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2022-03-20 18:27:47,842 INFO L403 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:27:47,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:27:47,842 INFO L85 PathProgramCache]: Analyzing trace with hash 1548139646, now seen corresponding path program 25 times [2022-03-20 18:27:47,842 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:27:47,842 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1487896063] [2022-03-20 18:27:47,866 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 18:27:47,867 INFO L85 PathProgramCache]: Analyzing trace with hash -73999726, now seen corresponding path program 1 times [2022-03-20 18:27:47,867 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:27:47,867 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [489594829] [2022-03-20 18:27:47,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:27:47,867 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:27:47,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:27:47,880 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:27:47,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:27:47,882 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:27:47,882 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:27:47,883 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [489594829] [2022-03-20 18:27:47,883 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [489594829] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:27:47,883 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:27:47,883 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 18:27:48,185 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:27:48,185 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1487896063] [2022-03-20 18:27:48,185 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1487896063] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:27:48,185 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:27:48,185 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [29] imperfect sequences [] total 29 [2022-03-20 18:27:48,185 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1430273413] [2022-03-20 18:27:48,185 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:27:48,185 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-03-20 18:27:48,186 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:27:48,186 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-03-20 18:27:48,186 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=757, Unknown=0, NotChecked=0, Total=812 [2022-03-20 18:27:48,186 INFO L87 Difference]: Start difference. First operand 62 states and 62 transitions. Second operand has 29 states, 29 states have (on average 1.9655172413793103) internal successors, (57), 28 states have internal predecessors, (57), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:27:48,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:27:48,847 INFO L93 Difference]: Finished difference Result 70 states and 70 transitions. [2022-03-20 18:27:48,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-03-20 18:27:48,847 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.9655172413793103) internal successors, (57), 28 states have internal predecessors, (57), 2 states have call successors, (3), 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 61 [2022-03-20 18:27:48,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:27:48,848 INFO L225 Difference]: With dead ends: 70 [2022-03-20 18:27:48,848 INFO L226 Difference]: Without dead ends: 65 [2022-03-20 18:27:48,849 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 26 SyntacticMatches, 9 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 325 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=159, Invalid=2811, Unknown=0, NotChecked=0, Total=2970 [2022-03-20 18:27:48,849 INFO L913 BasicCegarLoop]: 11 mSDtfsCounter, 34 mSDsluCounter, 132 mSDsCounter, 0 mSdLazyCounter, 1509 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 143 SdHoareTripleChecker+Invalid, 1537 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 1509 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-20 18:27:48,849 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 143 Invalid, 1537 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 1509 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-20 18:27:48,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2022-03-20 18:27:48,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 64. [2022-03-20 18:27:48,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 59 states have (on average 1.0169491525423728) internal successors, (60), 59 states have internal predecessors, (60), 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) [2022-03-20 18:27:48,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 64 transitions. [2022-03-20 18:27:48,865 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 64 transitions. Word has length 61 [2022-03-20 18:27:48,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:27:48,866 INFO L478 AbstractCegarLoop]: Abstraction has 64 states and 64 transitions. [2022-03-20 18:27:48,866 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.9655172413793103) internal successors, (57), 28 states have internal predecessors, (57), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:27:48,866 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 64 transitions. [2022-03-20 18:27:48,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-03-20 18:27:48,866 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:27:48,866 INFO L499 BasicCegarLoop]: trace histogram [26, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:27:48,866 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2022-03-20 18:27:48,866 INFO L403 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:27:48,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:27:48,867 INFO L85 PathProgramCache]: Analyzing trace with hash -1489456548, now seen corresponding path program 26 times [2022-03-20 18:27:48,867 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:27:48,867 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [497802002] [2022-03-20 18:27:48,893 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 18:27:48,893 INFO L85 PathProgramCache]: Analyzing trace with hash -14894382, now seen corresponding path program 1 times [2022-03-20 18:27:48,894 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:27:48,894 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1122388713] [2022-03-20 18:27:48,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:27:48,894 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:27:48,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:27:48,915 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:27:48,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:27:48,920 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:27:48,920 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:27:48,920 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1122388713] [2022-03-20 18:27:48,920 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1122388713] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:27:48,921 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:27:48,921 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 18:27:49,337 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:27:49,337 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [497802002] [2022-03-20 18:27:49,337 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [497802002] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:27:49,337 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:27:49,337 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [30] imperfect sequences [] total 30 [2022-03-20 18:27:49,337 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [447743341] [2022-03-20 18:27:49,337 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:27:49,337 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-03-20 18:27:49,338 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:27:49,338 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-03-20 18:27:49,338 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=813, Unknown=0, NotChecked=0, Total=870 [2022-03-20 18:27:49,338 INFO L87 Difference]: Start difference. First operand 64 states and 64 transitions. Second operand has 30 states, 30 states have (on average 1.9666666666666666) internal successors, (59), 29 states have internal predecessors, (59), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:27:50,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:27:50,066 INFO L93 Difference]: Finished difference Result 72 states and 72 transitions. [2022-03-20 18:27:50,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-03-20 18:27:50,066 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.9666666666666666) internal successors, (59), 29 states have internal predecessors, (59), 2 states have call successors, (3), 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 63 [2022-03-20 18:27:50,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:27:50,066 INFO L225 Difference]: With dead ends: 72 [2022-03-20 18:27:50,067 INFO L226 Difference]: Without dead ends: 67 [2022-03-20 18:27:50,068 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 19 SyntacticMatches, 17 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 351 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=165, Invalid=3027, Unknown=0, NotChecked=0, Total=3192 [2022-03-20 18:27:50,068 INFO L913 BasicCegarLoop]: 11 mSDtfsCounter, 35 mSDsluCounter, 137 mSDsCounter, 0 mSdLazyCounter, 1621 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 148 SdHoareTripleChecker+Invalid, 1650 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 1621 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-20 18:27:50,068 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [35 Valid, 148 Invalid, 1650 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 1621 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-20 18:27:50,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2022-03-20 18:27:50,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 66. [2022-03-20 18:27:50,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 61 states have (on average 1.0163934426229508) internal successors, (62), 61 states have internal predecessors, (62), 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) [2022-03-20 18:27:50,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 66 transitions. [2022-03-20 18:27:50,075 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 66 transitions. Word has length 63 [2022-03-20 18:27:50,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:27:50,075 INFO L478 AbstractCegarLoop]: Abstraction has 66 states and 66 transitions. [2022-03-20 18:27:50,075 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.9666666666666666) internal successors, (59), 29 states have internal predecessors, (59), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:27:50,075 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 66 transitions. [2022-03-20 18:27:50,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-03-20 18:27:50,075 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:27:50,075 INFO L499 BasicCegarLoop]: trace histogram [27, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:27:50,075 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2022-03-20 18:27:50,075 INFO L403 AbstractCegarLoop]: === Iteration 28 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:27:50,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:27:50,076 INFO L85 PathProgramCache]: Analyzing trace with hash -41637702, now seen corresponding path program 27 times [2022-03-20 18:27:50,076 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:27:50,076 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [564692224] [2022-03-20 18:27:50,109 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 18:27:50,109 INFO L85 PathProgramCache]: Analyzing trace with hash 44210962, now seen corresponding path program 1 times [2022-03-20 18:27:50,109 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:27:50,109 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [846705695] [2022-03-20 18:27:50,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:27:50,109 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:27:50,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:27:50,126 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:27:50,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:27:50,129 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:27:50,129 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:27:50,129 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [846705695] [2022-03-20 18:27:50,129 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [846705695] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:27:50,129 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:27:50,129 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 18:27:50,510 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:27:50,510 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [564692224] [2022-03-20 18:27:50,510 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [564692224] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:27:50,510 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:27:50,510 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [31] imperfect sequences [] total 31 [2022-03-20 18:27:50,510 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [72717987] [2022-03-20 18:27:50,511 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:27:50,511 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-03-20 18:27:50,511 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:27:50,511 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-03-20 18:27:50,511 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=871, Unknown=0, NotChecked=0, Total=930 [2022-03-20 18:27:50,511 INFO L87 Difference]: Start difference. First operand 66 states and 66 transitions. Second operand has 31 states, 31 states have (on average 1.967741935483871) internal successors, (61), 30 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) [2022-03-20 18:27:51,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:27:51,323 INFO L93 Difference]: Finished difference Result 74 states and 74 transitions. [2022-03-20 18:27:51,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-03-20 18:27:51,324 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.967741935483871) internal successors, (61), 30 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 [2022-03-20 18:27:51,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:27:51,324 INFO L225 Difference]: With dead ends: 74 [2022-03-20 18:27:51,324 INFO L226 Difference]: Without dead ends: 69 [2022-03-20 18:27:51,325 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 23 SyntacticMatches, 14 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 378 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=171, Invalid=3251, Unknown=0, NotChecked=0, Total=3422 [2022-03-20 18:27:51,325 INFO L913 BasicCegarLoop]: 11 mSDtfsCounter, 36 mSDsluCounter, 142 mSDsCounter, 0 mSdLazyCounter, 1737 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 153 SdHoareTripleChecker+Invalid, 1767 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 1737 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-20 18:27:51,325 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 153 Invalid, 1767 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 1737 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-20 18:27:51,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2022-03-20 18:27:51,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 68. [2022-03-20 18:27:51,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 63 states have (on average 1.0158730158730158) internal successors, (64), 63 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) [2022-03-20 18:27:51,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 68 transitions. [2022-03-20 18:27:51,333 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 68 transitions. Word has length 65 [2022-03-20 18:27:51,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:27:51,333 INFO L478 AbstractCegarLoop]: Abstraction has 68 states and 68 transitions. [2022-03-20 18:27:51,333 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.967741935483871) internal successors, (61), 30 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) [2022-03-20 18:27:51,333 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 68 transitions. [2022-03-20 18:27:51,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-03-20 18:27:51,333 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:27:51,333 INFO L499 BasicCegarLoop]: trace histogram [28, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:27:51,333 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2022-03-20 18:27:51,334 INFO L403 AbstractCegarLoop]: === Iteration 29 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:27:51,334 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:27:51,334 INFO L85 PathProgramCache]: Analyzing trace with hash -257130600, now seen corresponding path program 28 times [2022-03-20 18:27:51,334 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:27:51,334 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [71597531] [2022-03-20 18:27:51,355 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 18:27:51,356 INFO L85 PathProgramCache]: Analyzing trace with hash 103316306, now seen corresponding path program 1 times [2022-03-20 18:27:51,356 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:27:51,356 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [860105197] [2022-03-20 18:27:51,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:27:51,356 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:27:51,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:27:51,371 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:27:51,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:27:51,380 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:27:51,380 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:27:51,380 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [860105197] [2022-03-20 18:27:51,380 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [860105197] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:27:51,380 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:27:51,380 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 18:27:51,787 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:27:51,787 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [71597531] [2022-03-20 18:27:51,787 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [71597531] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:27:51,787 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:27:51,787 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [32] imperfect sequences [] total 32 [2022-03-20 18:27:51,787 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [819888905] [2022-03-20 18:27:51,787 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:27:51,787 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-03-20 18:27:51,788 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:27:51,788 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-03-20 18:27:51,788 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=931, Unknown=0, NotChecked=0, Total=992 [2022-03-20 18:27:51,788 INFO L87 Difference]: Start difference. First operand 68 states and 68 transitions. Second operand has 32 states, 32 states have (on average 1.96875) internal successors, (63), 31 states have internal predecessors, (63), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:27:52,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:27:52,643 INFO L93 Difference]: Finished difference Result 76 states and 76 transitions. [2022-03-20 18:27:52,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-03-20 18:27:52,644 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.96875) internal successors, (63), 31 states have internal predecessors, (63), 2 states have call successors, (3), 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 67 [2022-03-20 18:27:52,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:27:52,644 INFO L225 Difference]: With dead ends: 76 [2022-03-20 18:27:52,644 INFO L226 Difference]: Without dead ends: 71 [2022-03-20 18:27:52,645 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 23 SyntacticMatches, 15 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 406 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=177, Invalid=3483, Unknown=0, NotChecked=0, Total=3660 [2022-03-20 18:27:52,645 INFO L913 BasicCegarLoop]: 11 mSDtfsCounter, 37 mSDsluCounter, 147 mSDsCounter, 0 mSdLazyCounter, 1857 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 158 SdHoareTripleChecker+Invalid, 1888 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 1857 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-20 18:27:52,645 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [37 Valid, 158 Invalid, 1888 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 1857 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-20 18:27:52,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2022-03-20 18:27:52,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 70. [2022-03-20 18:27:52,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 65 states have (on average 1.0153846153846153) internal successors, (66), 65 states have internal predecessors, (66), 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) [2022-03-20 18:27:52,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 70 transitions. [2022-03-20 18:27:52,653 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 70 transitions. Word has length 67 [2022-03-20 18:27:52,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:27:52,653 INFO L478 AbstractCegarLoop]: Abstraction has 70 states and 70 transitions. [2022-03-20 18:27:52,653 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 1.96875) internal successors, (63), 31 states have internal predecessors, (63), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:27:52,653 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 70 transitions. [2022-03-20 18:27:52,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-03-20 18:27:52,653 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:27:52,653 INFO L499 BasicCegarLoop]: trace histogram [29, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:27:52,654 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2022-03-20 18:27:52,654 INFO L403 AbstractCegarLoop]: === Iteration 30 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:27:52,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:27:52,654 INFO L85 PathProgramCache]: Analyzing trace with hash -1187375370, now seen corresponding path program 29 times [2022-03-20 18:27:52,654 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:27:52,654 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [281594842] [2022-03-20 18:27:52,698 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 18:27:52,698 INFO L85 PathProgramCache]: Analyzing trace with hash 162421650, now seen corresponding path program 1 times [2022-03-20 18:27:52,698 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:27:52,698 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2038638694] [2022-03-20 18:27:52,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:27:52,698 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:27:52,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:27:52,717 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:27:52,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:27:52,720 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:27:52,720 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:27:52,720 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2038638694] [2022-03-20 18:27:52,720 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2038638694] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:27:52,720 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:27:52,720 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 18:27:53,150 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:27:53,150 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [281594842] [2022-03-20 18:27:53,150 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [281594842] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:27:53,150 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:27:53,150 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [33] imperfect sequences [] total 33 [2022-03-20 18:27:53,150 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [94114703] [2022-03-20 18:27:53,150 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:27:53,150 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-03-20 18:27:53,151 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:27:53,151 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-03-20 18:27:53,151 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=993, Unknown=0, NotChecked=0, Total=1056 [2022-03-20 18:27:53,151 INFO L87 Difference]: Start difference. First operand 70 states and 70 transitions. Second operand has 33 states, 33 states have (on average 1.9696969696969697) internal successors, (65), 32 states have internal predecessors, (65), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:27:54,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:27:54,006 INFO L93 Difference]: Finished difference Result 78 states and 78 transitions. [2022-03-20 18:27:54,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-03-20 18:27:54,006 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.9696969696969697) internal successors, (65), 32 states have internal predecessors, (65), 2 states have call successors, (3), 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 69 [2022-03-20 18:27:54,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:27:54,007 INFO L225 Difference]: With dead ends: 78 [2022-03-20 18:27:54,007 INFO L226 Difference]: Without dead ends: 73 [2022-03-20 18:27:54,008 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 26 SyntacticMatches, 13 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 435 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=183, Invalid=3723, Unknown=0, NotChecked=0, Total=3906 [2022-03-20 18:27:54,009 INFO L913 BasicCegarLoop]: 11 mSDtfsCounter, 38 mSDsluCounter, 152 mSDsCounter, 0 mSdLazyCounter, 1981 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 163 SdHoareTripleChecker+Invalid, 2013 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 1981 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-20 18:27:54,009 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [38 Valid, 163 Invalid, 2013 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 1981 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-20 18:27:54,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2022-03-20 18:27:54,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 72. [2022-03-20 18:27:54,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 67 states have (on average 1.0149253731343284) internal successors, (68), 67 states have internal predecessors, (68), 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) [2022-03-20 18:27:54,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 72 transitions. [2022-03-20 18:27:54,017 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 72 transitions. Word has length 69 [2022-03-20 18:27:54,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:27:54,017 INFO L478 AbstractCegarLoop]: Abstraction has 72 states and 72 transitions. [2022-03-20 18:27:54,017 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 1.9696969696969697) internal successors, (65), 32 states have internal predecessors, (65), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:27:54,017 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 72 transitions. [2022-03-20 18:27:54,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-03-20 18:27:54,017 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:27:54,017 INFO L499 BasicCegarLoop]: trace histogram [30, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:27:54,017 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2022-03-20 18:27:54,017 INFO L403 AbstractCegarLoop]: === Iteration 31 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:27:54,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:27:54,018 INFO L85 PathProgramCache]: Analyzing trace with hash -1799401772, now seen corresponding path program 30 times [2022-03-20 18:27:54,018 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:27:54,018 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1704368712] [2022-03-20 18:27:54,037 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 18:27:54,037 INFO L85 PathProgramCache]: Analyzing trace with hash 221526994, now seen corresponding path program 1 times [2022-03-20 18:27:54,038 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:27:54,038 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [317232584] [2022-03-20 18:27:54,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:27:54,038 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:27:54,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:27:54,050 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:27:54,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:27:54,053 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:27:54,053 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:27:54,053 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [317232584] [2022-03-20 18:27:54,054 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [317232584] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:27:54,054 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:27:54,054 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 18:27:54,526 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:27:54,527 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1704368712] [2022-03-20 18:27:54,527 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1704368712] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:27:54,527 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:27:54,527 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [34] imperfect sequences [] total 34 [2022-03-20 18:27:54,527 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [282297057] [2022-03-20 18:27:54,527 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:27:54,527 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-03-20 18:27:54,527 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:27:54,527 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-03-20 18:27:54,528 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=1057, Unknown=0, NotChecked=0, Total=1122 [2022-03-20 18:27:54,528 INFO L87 Difference]: Start difference. First operand 72 states and 72 transitions. Second operand has 34 states, 34 states have (on average 1.9705882352941178) internal successors, (67), 33 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) [2022-03-20 18:27:55,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:27:55,438 INFO L93 Difference]: Finished difference Result 80 states and 80 transitions. [2022-03-20 18:27:55,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-03-20 18:27:55,439 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 1.9705882352941178) internal successors, (67), 33 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 [2022-03-20 18:27:55,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:27:55,439 INFO L225 Difference]: With dead ends: 80 [2022-03-20 18:27:55,439 INFO L226 Difference]: Without dead ends: 75 [2022-03-20 18:27:55,440 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 22 SyntacticMatches, 18 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 465 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=189, Invalid=3971, Unknown=0, NotChecked=0, Total=4160 [2022-03-20 18:27:55,441 INFO L913 BasicCegarLoop]: 11 mSDtfsCounter, 39 mSDsluCounter, 157 mSDsCounter, 0 mSdLazyCounter, 2109 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 168 SdHoareTripleChecker+Invalid, 2142 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 2109 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-20 18:27:55,441 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 168 Invalid, 2142 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 2109 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-20 18:27:55,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2022-03-20 18:27:55,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 74. [2022-03-20 18:27:55,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 69 states have (on average 1.0144927536231885) internal successors, (70), 69 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) [2022-03-20 18:27:55,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 74 transitions. [2022-03-20 18:27:55,449 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 74 transitions. Word has length 71 [2022-03-20 18:27:55,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:27:55,449 INFO L478 AbstractCegarLoop]: Abstraction has 74 states and 74 transitions. [2022-03-20 18:27:55,449 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 1.9705882352941178) internal successors, (67), 33 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) [2022-03-20 18:27:55,449 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 74 transitions. [2022-03-20 18:27:55,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-03-20 18:27:55,450 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:27:55,450 INFO L499 BasicCegarLoop]: trace histogram [31, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:27:55,450 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2022-03-20 18:27:55,450 INFO L403 AbstractCegarLoop]: === Iteration 32 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:27:55,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:27:55,450 INFO L85 PathProgramCache]: Analyzing trace with hash -1546254542, now seen corresponding path program 31 times [2022-03-20 18:27:55,450 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:27:55,450 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1868970043] [2022-03-20 18:27:55,470 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 18:27:55,471 INFO L85 PathProgramCache]: Analyzing trace with hash 280632338, now seen corresponding path program 1 times [2022-03-20 18:27:55,471 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:27:55,471 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [568867698] [2022-03-20 18:27:55,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:27:55,471 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:27:55,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:27:55,486 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:27:55,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:27:55,488 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:27:55,488 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:27:55,488 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [568867698] [2022-03-20 18:27:55,488 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [568867698] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:27:55,488 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:27:55,488 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 18:27:55,969 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:27:55,969 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1868970043] [2022-03-20 18:27:55,969 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1868970043] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:27:55,969 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:27:55,969 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [35] imperfect sequences [] total 35 [2022-03-20 18:27:55,969 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1773221857] [2022-03-20 18:27:55,970 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:27:55,970 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-03-20 18:27:55,970 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:27:55,970 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-03-20 18:27:55,970 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=1123, Unknown=0, NotChecked=0, Total=1190 [2022-03-20 18:27:55,970 INFO L87 Difference]: Start difference. First operand 74 states and 74 transitions. Second operand has 35 states, 35 states have (on average 1.9714285714285715) internal successors, (69), 34 states have internal predecessors, (69), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:27:56,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:27:56,947 INFO L93 Difference]: Finished difference Result 82 states and 82 transitions. [2022-03-20 18:27:56,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-03-20 18:27:56,947 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.9714285714285715) internal successors, (69), 34 states have internal predecessors, (69), 2 states have call successors, (3), 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 73 [2022-03-20 18:27:56,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:27:56,948 INFO L225 Difference]: With dead ends: 82 [2022-03-20 18:27:56,948 INFO L226 Difference]: Without dead ends: 77 [2022-03-20 18:27:56,949 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 27 SyntacticMatches, 14 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 496 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=195, Invalid=4227, Unknown=0, NotChecked=0, Total=4422 [2022-03-20 18:27:56,950 INFO L913 BasicCegarLoop]: 11 mSDtfsCounter, 40 mSDsluCounter, 162 mSDsCounter, 0 mSdLazyCounter, 2241 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 173 SdHoareTripleChecker+Invalid, 2275 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 2241 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-20 18:27:56,950 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [40 Valid, 173 Invalid, 2275 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 2241 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-20 18:27:56,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2022-03-20 18:27:56,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 76. [2022-03-20 18:27:56,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 71 states have (on average 1.0140845070422535) internal successors, (72), 71 states have internal predecessors, (72), 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) [2022-03-20 18:27:56,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 76 transitions. [2022-03-20 18:27:56,959 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 76 transitions. Word has length 73 [2022-03-20 18:27:56,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:27:56,960 INFO L478 AbstractCegarLoop]: Abstraction has 76 states and 76 transitions. [2022-03-20 18:27:56,960 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 1.9714285714285715) internal successors, (69), 34 states have internal predecessors, (69), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:27:56,960 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 76 transitions. [2022-03-20 18:27:56,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2022-03-20 18:27:56,961 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:27:56,961 INFO L499 BasicCegarLoop]: trace histogram [32, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:27:56,961 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2022-03-20 18:27:56,961 INFO L403 AbstractCegarLoop]: === Iteration 33 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:27:56,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:27:56,961 INFO L85 PathProgramCache]: Analyzing trace with hash 1210064912, now seen corresponding path program 32 times [2022-03-20 18:27:56,961 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:27:56,961 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1905169235] [2022-03-20 18:27:56,986 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 18:27:56,986 INFO L85 PathProgramCache]: Analyzing trace with hash 339737682, now seen corresponding path program 1 times [2022-03-20 18:27:56,986 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:27:56,986 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [471968986] [2022-03-20 18:27:56,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:27:56,986 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:27:56,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:27:57,000 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:27:57,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:27:57,005 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:27:57,005 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:27:57,005 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [471968986] [2022-03-20 18:27:57,005 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [471968986] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:27:57,005 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:27:57,005 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 18:27:57,552 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:27:57,552 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1905169235] [2022-03-20 18:27:57,552 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1905169235] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:27:57,552 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:27:57,552 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [36] imperfect sequences [] total 36 [2022-03-20 18:27:57,553 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [762850479] [2022-03-20 18:27:57,553 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:27:57,553 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-03-20 18:27:57,553 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:27:57,553 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-03-20 18:27:57,553 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=1191, Unknown=0, NotChecked=0, Total=1260 [2022-03-20 18:27:57,553 INFO L87 Difference]: Start difference. First operand 76 states and 76 transitions. Second operand has 36 states, 36 states have (on average 1.9722222222222223) internal successors, (71), 35 states have internal predecessors, (71), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:27:58,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:27:58,605 INFO L93 Difference]: Finished difference Result 84 states and 84 transitions. [2022-03-20 18:27:58,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-03-20 18:27:58,606 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.9722222222222223) internal successors, (71), 35 states have internal predecessors, (71), 2 states have call successors, (3), 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 75 [2022-03-20 18:27:58,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:27:58,606 INFO L225 Difference]: With dead ends: 84 [2022-03-20 18:27:58,606 INFO L226 Difference]: Without dead ends: 79 [2022-03-20 18:27:58,607 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 21 SyntacticMatches, 21 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 528 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=201, Invalid=4491, Unknown=0, NotChecked=0, Total=4692 [2022-03-20 18:27:58,608 INFO L913 BasicCegarLoop]: 11 mSDtfsCounter, 41 mSDsluCounter, 167 mSDsCounter, 0 mSdLazyCounter, 2377 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 178 SdHoareTripleChecker+Invalid, 2412 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 2377 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-20 18:27:58,608 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [41 Valid, 178 Invalid, 2412 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 2377 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-20 18:27:58,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2022-03-20 18:27:58,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 78. [2022-03-20 18:27:58,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 73 states have (on average 1.0136986301369864) internal successors, (74), 73 states have internal predecessors, (74), 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) [2022-03-20 18:27:58,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 78 transitions. [2022-03-20 18:27:58,617 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 78 transitions. Word has length 75 [2022-03-20 18:27:58,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:27:58,617 INFO L478 AbstractCegarLoop]: Abstraction has 78 states and 78 transitions. [2022-03-20 18:27:58,617 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 1.9722222222222223) internal successors, (71), 35 states have internal predecessors, (71), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:27:58,617 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 78 transitions. [2022-03-20 18:27:58,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2022-03-20 18:27:58,618 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:27:58,618 INFO L499 BasicCegarLoop]: trace histogram [33, 33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:27:58,618 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2022-03-20 18:27:58,618 INFO L403 AbstractCegarLoop]: === Iteration 34 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:27:58,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:27:58,618 INFO L85 PathProgramCache]: Analyzing trace with hash 38238574, now seen corresponding path program 33 times [2022-03-20 18:27:58,618 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:27:58,618 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [507899075] [2022-03-20 18:27:58,637 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 18:27:58,638 INFO L85 PathProgramCache]: Analyzing trace with hash 398843026, now seen corresponding path program 1 times [2022-03-20 18:27:58,638 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:27:58,638 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [177640535] [2022-03-20 18:27:58,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:27:58,638 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:27:58,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:27:58,651 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:27:58,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:27:58,653 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:27:58,653 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:27:58,653 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [177640535] [2022-03-20 18:27:58,653 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [177640535] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:27:58,653 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:27:58,653 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 18:27:59,229 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:27:59,229 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [507899075] [2022-03-20 18:27:59,229 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [507899075] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:27:59,229 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:27:59,229 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [37] imperfect sequences [] total 37 [2022-03-20 18:27:59,229 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [34895661] [2022-03-20 18:27:59,229 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:27:59,230 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-03-20 18:27:59,230 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:27:59,230 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-03-20 18:27:59,230 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=1261, Unknown=0, NotChecked=0, Total=1332 [2022-03-20 18:27:59,230 INFO L87 Difference]: Start difference. First operand 78 states and 78 transitions. Second operand has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 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) [2022-03-20 18:28:00,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:28:00,329 INFO L93 Difference]: Finished difference Result 86 states and 86 transitions. [2022-03-20 18:28:00,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-03-20 18:28:00,330 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 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 [2022-03-20 18:28:00,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:28:00,330 INFO L225 Difference]: With dead ends: 86 [2022-03-20 18:28:00,330 INFO L226 Difference]: Without dead ends: 81 [2022-03-20 18:28:00,331 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 23 SyntacticMatches, 20 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 561 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=207, Invalid=4763, Unknown=0, NotChecked=0, Total=4970 [2022-03-20 18:28:00,331 INFO L913 BasicCegarLoop]: 11 mSDtfsCounter, 42 mSDsluCounter, 172 mSDsCounter, 0 mSdLazyCounter, 2517 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 183 SdHoareTripleChecker+Invalid, 2553 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 2517 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-20 18:28:00,331 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [42 Valid, 183 Invalid, 2553 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 2517 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-20 18:28:00,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2022-03-20 18:28:00,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 80. [2022-03-20 18:28:00,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 75 states have (on average 1.0133333333333334) internal successors, (76), 75 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) [2022-03-20 18:28:00,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 80 transitions. [2022-03-20 18:28:00,341 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 80 transitions. Word has length 77 [2022-03-20 18:28:00,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:28:00,341 INFO L478 AbstractCegarLoop]: Abstraction has 80 states and 80 transitions. [2022-03-20 18:28:00,341 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 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) [2022-03-20 18:28:00,341 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 80 transitions. [2022-03-20 18:28:00,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2022-03-20 18:28:00,341 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:28:00,341 INFO L499 BasicCegarLoop]: trace histogram [34, 34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:28:00,342 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2022-03-20 18:28:00,342 INFO L403 AbstractCegarLoop]: === Iteration 35 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:28:00,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:28:00,342 INFO L85 PathProgramCache]: Analyzing trace with hash -805440692, now seen corresponding path program 34 times [2022-03-20 18:28:00,342 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:28:00,342 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [398927115] [2022-03-20 18:28:00,363 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 18:28:00,364 INFO L85 PathProgramCache]: Analyzing trace with hash 457948370, now seen corresponding path program 1 times [2022-03-20 18:28:00,364 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:28:00,364 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2029582219] [2022-03-20 18:28:00,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:28:00,364 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:28:00,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:28:00,388 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:28:00,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:28:00,391 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:28:00,391 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:28:00,392 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2029582219] [2022-03-20 18:28:00,393 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2029582219] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:28:00,395 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:28:00,395 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 18:28:00,961 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:28:00,961 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [398927115] [2022-03-20 18:28:00,961 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [398927115] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:28:00,961 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:28:00,961 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [38] imperfect sequences [] total 38 [2022-03-20 18:28:00,961 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1199629361] [2022-03-20 18:28:00,961 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:28:00,961 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-03-20 18:28:00,961 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:28:00,962 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-03-20 18:28:00,962 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=1333, Unknown=0, NotChecked=0, Total=1406 [2022-03-20 18:28:00,962 INFO L87 Difference]: Start difference. First operand 80 states and 80 transitions. Second operand has 38 states, 38 states have (on average 1.9736842105263157) internal successors, (75), 37 states have internal predecessors, (75), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:28:02,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:28:02,095 INFO L93 Difference]: Finished difference Result 88 states and 88 transitions. [2022-03-20 18:28:02,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-03-20 18:28:02,096 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 1.9736842105263157) internal successors, (75), 37 states have internal predecessors, (75), 2 states have call successors, (3), 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 79 [2022-03-20 18:28:02,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:28:02,096 INFO L225 Difference]: With dead ends: 88 [2022-03-20 18:28:02,096 INFO L226 Difference]: Without dead ends: 83 [2022-03-20 18:28:02,097 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 27 SyntacticMatches, 17 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 595 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=213, Invalid=5043, Unknown=0, NotChecked=0, Total=5256 [2022-03-20 18:28:02,097 INFO L913 BasicCegarLoop]: 11 mSDtfsCounter, 43 mSDsluCounter, 177 mSDsCounter, 0 mSdLazyCounter, 2661 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 188 SdHoareTripleChecker+Invalid, 2698 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 2661 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-20 18:28:02,097 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [43 Valid, 188 Invalid, 2698 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 2661 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-20 18:28:02,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2022-03-20 18:28:02,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 82. [2022-03-20 18:28:02,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 77 states have (on average 1.0129870129870129) internal successors, (78), 77 states have internal predecessors, (78), 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) [2022-03-20 18:28:02,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 82 transitions. [2022-03-20 18:28:02,107 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 82 transitions. Word has length 79 [2022-03-20 18:28:02,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:28:02,107 INFO L478 AbstractCegarLoop]: Abstraction has 82 states and 82 transitions. [2022-03-20 18:28:02,107 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 1.9736842105263157) internal successors, (75), 37 states have internal predecessors, (75), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:28:02,108 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 82 transitions. [2022-03-20 18:28:02,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2022-03-20 18:28:02,108 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:28:02,108 INFO L499 BasicCegarLoop]: trace histogram [35, 35, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:28:02,108 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2022-03-20 18:28:02,108 INFO L403 AbstractCegarLoop]: === Iteration 36 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:28:02,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:28:02,108 INFO L85 PathProgramCache]: Analyzing trace with hash 167603626, now seen corresponding path program 35 times [2022-03-20 18:28:02,108 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:28:02,108 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [999769203] [2022-03-20 18:28:02,134 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 18:28:02,135 INFO L85 PathProgramCache]: Analyzing trace with hash 517053714, now seen corresponding path program 1 times [2022-03-20 18:28:02,135 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:28:02,135 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [734516530] [2022-03-20 18:28:02,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:28:02,135 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:28:02,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:28:02,148 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:28:02,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:28:02,150 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:28:02,151 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:28:02,151 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [734516530] [2022-03-20 18:28:02,151 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [734516530] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:28:02,151 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:28:02,151 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 18:28:02,806 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:28:02,806 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [999769203] [2022-03-20 18:28:02,806 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [999769203] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:28:02,806 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:28:02,806 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [39] imperfect sequences [] total 39 [2022-03-20 18:28:02,806 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1121819797] [2022-03-20 18:28:02,807 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:28:02,807 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-03-20 18:28:02,807 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:28:02,807 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-03-20 18:28:02,807 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=1407, Unknown=0, NotChecked=0, Total=1482 [2022-03-20 18:28:02,807 INFO L87 Difference]: Start difference. First operand 82 states and 82 transitions. Second operand has 39 states, 39 states have (on average 1.9743589743589745) internal successors, (77), 38 states have internal predecessors, (77), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:28:04,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:28:04,066 INFO L93 Difference]: Finished difference Result 90 states and 90 transitions. [2022-03-20 18:28:04,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-03-20 18:28:04,066 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.9743589743589745) internal successors, (77), 38 states have internal predecessors, (77), 2 states have call successors, (3), 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 81 [2022-03-20 18:28:04,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:28:04,067 INFO L225 Difference]: With dead ends: 90 [2022-03-20 18:28:04,067 INFO L226 Difference]: Without dead ends: 85 [2022-03-20 18:28:04,068 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 26 SyntacticMatches, 19 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 630 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=219, Invalid=5331, Unknown=0, NotChecked=0, Total=5550 [2022-03-20 18:28:04,068 INFO L913 BasicCegarLoop]: 11 mSDtfsCounter, 44 mSDsluCounter, 182 mSDsCounter, 0 mSdLazyCounter, 2809 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 193 SdHoareTripleChecker+Invalid, 2847 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 2809 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-20 18:28:04,068 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [44 Valid, 193 Invalid, 2847 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 2809 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-03-20 18:28:04,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2022-03-20 18:28:04,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 84. [2022-03-20 18:28:04,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 79 states have (on average 1.0126582278481013) internal successors, (80), 79 states have internal predecessors, (80), 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) [2022-03-20 18:28:04,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 84 transitions. [2022-03-20 18:28:04,078 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 84 transitions. Word has length 81 [2022-03-20 18:28:04,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:28:04,079 INFO L478 AbstractCegarLoop]: Abstraction has 84 states and 84 transitions. [2022-03-20 18:28:04,079 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 1.9743589743589745) internal successors, (77), 38 states have internal predecessors, (77), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:28:04,079 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 84 transitions. [2022-03-20 18:28:04,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2022-03-20 18:28:04,079 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:28:04,079 INFO L499 BasicCegarLoop]: trace histogram [36, 36, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:28:04,079 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2022-03-20 18:28:04,079 INFO L403 AbstractCegarLoop]: === Iteration 37 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:28:04,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:28:04,080 INFO L85 PathProgramCache]: Analyzing trace with hash -1039677304, now seen corresponding path program 36 times [2022-03-20 18:28:04,080 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:28:04,080 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [962231229] [2022-03-20 18:28:04,101 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 18:28:04,102 INFO L85 PathProgramCache]: Analyzing trace with hash 576159058, now seen corresponding path program 1 times [2022-03-20 18:28:04,102 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:28:04,102 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1809631355] [2022-03-20 18:28:04,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:28:04,102 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:28:04,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:28:04,116 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:28:04,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:28:04,118 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:28:04,119 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:28:04,119 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1809631355] [2022-03-20 18:28:04,119 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1809631355] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:28:04,119 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:28:04,119 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 18:28:04,699 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:28:04,699 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [962231229] [2022-03-20 18:28:04,699 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [962231229] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:28:04,699 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:28:04,699 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [40] imperfect sequences [] total 40 [2022-03-20 18:28:04,699 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1882031061] [2022-03-20 18:28:04,699 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:28:04,700 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-03-20 18:28:04,700 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:28:04,700 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-03-20 18:28:04,700 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=1483, Unknown=0, NotChecked=0, Total=1560 [2022-03-20 18:28:04,700 INFO L87 Difference]: Start difference. First operand 84 states and 84 transitions. Second operand has 40 states, 40 states have (on average 1.975) internal successors, (79), 39 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) [2022-03-20 18:28:05,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:28:05,957 INFO L93 Difference]: Finished difference Result 92 states and 92 transitions. [2022-03-20 18:28:05,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-03-20 18:28:05,957 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 1.975) internal successors, (79), 39 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 [2022-03-20 18:28:05,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:28:05,958 INFO L225 Difference]: With dead ends: 92 [2022-03-20 18:28:05,958 INFO L226 Difference]: Without dead ends: 87 [2022-03-20 18:28:05,959 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 30 SyntacticMatches, 16 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 666 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=225, Invalid=5627, Unknown=0, NotChecked=0, Total=5852 [2022-03-20 18:28:05,959 INFO L913 BasicCegarLoop]: 11 mSDtfsCounter, 45 mSDsluCounter, 187 mSDsCounter, 0 mSdLazyCounter, 2961 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 198 SdHoareTripleChecker+Invalid, 3000 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 2961 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-20 18:28:05,959 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [45 Valid, 198 Invalid, 3000 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 2961 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-03-20 18:28:05,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2022-03-20 18:28:05,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 86. [2022-03-20 18:28:05,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 81 states have (on average 1.0123456790123457) internal successors, (82), 81 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) [2022-03-20 18:28:05,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 86 transitions. [2022-03-20 18:28:05,971 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 86 transitions. Word has length 83 [2022-03-20 18:28:05,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:28:05,971 INFO L478 AbstractCegarLoop]: Abstraction has 86 states and 86 transitions. [2022-03-20 18:28:05,971 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 1.975) internal successors, (79), 39 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) [2022-03-20 18:28:05,971 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 86 transitions. [2022-03-20 18:28:05,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2022-03-20 18:28:05,972 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:28:05,972 INFO L499 BasicCegarLoop]: trace histogram [37, 37, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:28:05,972 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2022-03-20 18:28:05,972 INFO L403 AbstractCegarLoop]: === Iteration 38 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:28:05,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:28:05,972 INFO L85 PathProgramCache]: Analyzing trace with hash -1595481114, now seen corresponding path program 37 times [2022-03-20 18:28:05,972 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:28:05,972 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1677393176] [2022-03-20 18:28:05,999 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 18:28:06,000 INFO L85 PathProgramCache]: Analyzing trace with hash 635264402, now seen corresponding path program 1 times [2022-03-20 18:28:06,000 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:28:06,000 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1833373470] [2022-03-20 18:28:06,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:28:06,000 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:28:06,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:28:06,018 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:28:06,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:28:06,026 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:28:06,026 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:28:06,027 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1833373470] [2022-03-20 18:28:06,027 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1833373470] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:28:06,027 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:28:06,027 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 18:28:06,740 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:28:06,741 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1677393176] [2022-03-20 18:28:06,741 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1677393176] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:28:06,741 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:28:06,741 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [41] imperfect sequences [] total 41 [2022-03-20 18:28:06,741 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [499907908] [2022-03-20 18:28:06,741 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:28:06,741 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-03-20 18:28:06,741 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:28:06,742 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-03-20 18:28:06,742 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=1561, Unknown=0, NotChecked=0, Total=1640 [2022-03-20 18:28:06,742 INFO L87 Difference]: Start difference. First operand 86 states and 86 transitions. Second operand has 41 states, 41 states have (on average 1.975609756097561) internal successors, (81), 40 states have internal predecessors, (81), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:28:08,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:28:08,106 INFO L93 Difference]: Finished difference Result 94 states and 94 transitions. [2022-03-20 18:28:08,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-03-20 18:28:08,107 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.975609756097561) internal successors, (81), 40 states have internal predecessors, (81), 2 states have call successors, (3), 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 85 [2022-03-20 18:28:08,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:28:08,107 INFO L225 Difference]: With dead ends: 94 [2022-03-20 18:28:08,107 INFO L226 Difference]: Without dead ends: 89 [2022-03-20 18:28:08,108 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 25 SyntacticMatches, 22 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 703 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=231, Invalid=5931, Unknown=0, NotChecked=0, Total=6162 [2022-03-20 18:28:08,109 INFO L913 BasicCegarLoop]: 11 mSDtfsCounter, 46 mSDsluCounter, 192 mSDsCounter, 0 mSdLazyCounter, 3117 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 203 SdHoareTripleChecker+Invalid, 3157 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 3117 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-03-20 18:28:08,109 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [46 Valid, 203 Invalid, 3157 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 3117 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-03-20 18:28:08,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2022-03-20 18:28:08,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 88. [2022-03-20 18:28:08,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 83 states have (on average 1.0120481927710843) internal successors, (84), 83 states have internal predecessors, (84), 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) [2022-03-20 18:28:08,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 88 transitions. [2022-03-20 18:28:08,120 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 88 transitions. Word has length 85 [2022-03-20 18:28:08,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:28:08,120 INFO L478 AbstractCegarLoop]: Abstraction has 88 states and 88 transitions. [2022-03-20 18:28:08,120 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.975609756097561) internal successors, (81), 40 states have internal predecessors, (81), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:28:08,120 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 88 transitions. [2022-03-20 18:28:08,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2022-03-20 18:28:08,121 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:28:08,121 INFO L499 BasicCegarLoop]: trace histogram [38, 38, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:28:08,121 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2022-03-20 18:28:08,121 INFO L403 AbstractCegarLoop]: === Iteration 39 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:28:08,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:28:08,121 INFO L85 PathProgramCache]: Analyzing trace with hash 1147969476, now seen corresponding path program 38 times [2022-03-20 18:28:08,121 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:28:08,121 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [311800401] [2022-03-20 18:28:08,143 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 18:28:08,143 INFO L85 PathProgramCache]: Analyzing trace with hash 694369746, now seen corresponding path program 1 times [2022-03-20 18:28:08,143 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:28:08,143 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1692400633] [2022-03-20 18:28:08,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:28:08,143 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:28:08,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:28:08,163 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:28:08,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:28:08,166 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:28:08,166 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:28:08,166 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1692400633] [2022-03-20 18:28:08,166 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1692400633] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:28:08,166 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:28:08,166 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 18:28:08,814 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:28:08,814 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [311800401] [2022-03-20 18:28:08,814 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [311800401] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:28:08,814 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:28:08,814 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [42] imperfect sequences [] total 42 [2022-03-20 18:28:08,814 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [413527658] [2022-03-20 18:28:08,814 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:28:08,814 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-03-20 18:28:08,814 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:28:08,815 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-03-20 18:28:08,815 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=1641, Unknown=0, NotChecked=0, Total=1722 [2022-03-20 18:28:08,815 INFO L87 Difference]: Start difference. First operand 88 states and 88 transitions. Second operand has 42 states, 42 states have (on average 1.9761904761904763) internal successors, (83), 41 states have internal predecessors, (83), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:28:10,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:28:10,261 INFO L93 Difference]: Finished difference Result 96 states and 96 transitions. [2022-03-20 18:28:10,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-03-20 18:28:10,262 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 1.9761904761904763) internal successors, (83), 41 states have internal predecessors, (83), 2 states have call successors, (3), 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 87 [2022-03-20 18:28:10,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:28:10,263 INFO L225 Difference]: With dead ends: 96 [2022-03-20 18:28:10,263 INFO L226 Difference]: Without dead ends: 91 [2022-03-20 18:28:10,263 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 32 SyntacticMatches, 16 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 741 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=237, Invalid=6243, Unknown=0, NotChecked=0, Total=6480 [2022-03-20 18:28:10,264 INFO L913 BasicCegarLoop]: 11 mSDtfsCounter, 47 mSDsluCounter, 197 mSDsCounter, 0 mSdLazyCounter, 3277 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 208 SdHoareTripleChecker+Invalid, 3318 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 3277 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-03-20 18:28:10,264 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [47 Valid, 208 Invalid, 3318 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 3277 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-03-20 18:28:10,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2022-03-20 18:28:10,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 90. [2022-03-20 18:28:10,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 85 states have (on average 1.011764705882353) internal successors, (86), 85 states have internal predecessors, (86), 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) [2022-03-20 18:28:10,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 90 transitions. [2022-03-20 18:28:10,279 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 90 transitions. Word has length 87 [2022-03-20 18:28:10,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:28:10,279 INFO L478 AbstractCegarLoop]: Abstraction has 90 states and 90 transitions. [2022-03-20 18:28:10,279 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 1.9761904761904763) internal successors, (83), 41 states have internal predecessors, (83), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:28:10,280 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 90 transitions. [2022-03-20 18:28:10,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2022-03-20 18:28:10,280 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:28:10,280 INFO L499 BasicCegarLoop]: trace histogram [39, 39, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:28:10,280 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2022-03-20 18:28:10,280 INFO L403 AbstractCegarLoop]: === Iteration 40 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:28:10,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:28:10,281 INFO L85 PathProgramCache]: Analyzing trace with hash 494066722, now seen corresponding path program 39 times [2022-03-20 18:28:10,281 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:28:10,281 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [62218295] [2022-03-20 18:28:10,304 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 18:28:10,304 INFO L85 PathProgramCache]: Analyzing trace with hash 753475090, now seen corresponding path program 1 times [2022-03-20 18:28:10,304 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:28:10,304 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [468627321] [2022-03-20 18:28:10,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:28:10,304 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:28:10,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:28:10,326 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:28:10,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:28:10,328 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:28:10,328 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:28:10,328 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [468627321] [2022-03-20 18:28:10,328 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [468627321] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:28:10,328 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:28:10,328 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 18:28:11,057 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:28:11,058 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [62218295] [2022-03-20 18:28:11,058 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [62218295] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:28:11,058 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:28:11,058 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [43] imperfect sequences [] total 43 [2022-03-20 18:28:11,058 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [437182893] [2022-03-20 18:28:11,058 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:28:11,058 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-03-20 18:28:11,058 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:28:11,059 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-03-20 18:28:11,059 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=1723, Unknown=0, NotChecked=0, Total=1806 [2022-03-20 18:28:11,059 INFO L87 Difference]: Start difference. First operand 90 states and 90 transitions. Second operand has 43 states, 43 states have (on average 1.9767441860465116) internal successors, (85), 42 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) [2022-03-20 18:28:12,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:28:12,494 INFO L93 Difference]: Finished difference Result 98 states and 98 transitions. [2022-03-20 18:28:12,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-03-20 18:28:12,494 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.9767441860465116) internal successors, (85), 42 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 [2022-03-20 18:28:12,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:28:12,495 INFO L225 Difference]: With dead ends: 98 [2022-03-20 18:28:12,495 INFO L226 Difference]: Without dead ends: 93 [2022-03-20 18:28:12,495 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 29 SyntacticMatches, 20 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 780 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=243, Invalid=6563, Unknown=0, NotChecked=0, Total=6806 [2022-03-20 18:28:12,495 INFO L913 BasicCegarLoop]: 11 mSDtfsCounter, 48 mSDsluCounter, 202 mSDsCounter, 0 mSdLazyCounter, 3441 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 213 SdHoareTripleChecker+Invalid, 3483 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 3441 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-03-20 18:28:12,496 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [48 Valid, 213 Invalid, 3483 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 3441 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-03-20 18:28:12,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2022-03-20 18:28:12,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 92. [2022-03-20 18:28:12,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 87 states have (on average 1.0114942528735633) internal successors, (88), 87 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) [2022-03-20 18:28:12,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 92 transitions. [2022-03-20 18:28:12,509 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 92 transitions. Word has length 89 [2022-03-20 18:28:12,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:28:12,509 INFO L478 AbstractCegarLoop]: Abstraction has 92 states and 92 transitions. [2022-03-20 18:28:12,509 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 1.9767441860465116) internal successors, (85), 42 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) [2022-03-20 18:28:12,509 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 92 transitions. [2022-03-20 18:28:12,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2022-03-20 18:28:12,510 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:28:12,510 INFO L499 BasicCegarLoop]: trace histogram [40, 40, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:28:12,510 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2022-03-20 18:28:12,510 INFO L403 AbstractCegarLoop]: === Iteration 41 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:28:12,510 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:28:12,510 INFO L85 PathProgramCache]: Analyzing trace with hash -841254656, now seen corresponding path program 40 times [2022-03-20 18:28:12,510 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:28:12,510 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1828091515] [2022-03-20 18:28:12,532 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 18:28:12,532 INFO L85 PathProgramCache]: Analyzing trace with hash 812580434, now seen corresponding path program 1 times [2022-03-20 18:28:12,532 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:28:12,532 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [53339508] [2022-03-20 18:28:12,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:28:12,532 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:28:12,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:28:12,546 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:28:12,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:28:12,548 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:28:12,548 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:28:12,548 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [53339508] [2022-03-20 18:28:12,548 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [53339508] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:28:12,548 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:28:12,548 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 18:28:13,322 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:28:13,322 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1828091515] [2022-03-20 18:28:13,322 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1828091515] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:28:13,322 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:28:13,322 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [44] imperfect sequences [] total 44 [2022-03-20 18:28:13,322 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1537948415] [2022-03-20 18:28:13,322 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:28:13,323 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-03-20 18:28:13,323 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:28:13,323 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-03-20 18:28:13,323 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=1807, Unknown=0, NotChecked=0, Total=1892 [2022-03-20 18:28:13,323 INFO L87 Difference]: Start difference. First operand 92 states and 92 transitions. Second operand has 44 states, 44 states have (on average 1.9772727272727273) internal successors, (87), 43 states have internal predecessors, (87), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:28:14,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:28:14,851 INFO L93 Difference]: Finished difference Result 100 states and 100 transitions. [2022-03-20 18:28:14,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-03-20 18:28:14,856 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 1.9772727272727273) internal successors, (87), 43 states have internal predecessors, (87), 2 states have call successors, (3), 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 91 [2022-03-20 18:28:14,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:28:14,857 INFO L225 Difference]: With dead ends: 100 [2022-03-20 18:28:14,857 INFO L226 Difference]: Without dead ends: 95 [2022-03-20 18:28:14,857 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 28 SyntacticMatches, 22 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 820 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=249, Invalid=6891, Unknown=0, NotChecked=0, Total=7140 [2022-03-20 18:28:14,858 INFO L913 BasicCegarLoop]: 11 mSDtfsCounter, 49 mSDsluCounter, 207 mSDsCounter, 0 mSdLazyCounter, 3609 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 218 SdHoareTripleChecker+Invalid, 3652 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 3609 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-03-20 18:28:14,858 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [49 Valid, 218 Invalid, 3652 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 3609 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-03-20 18:28:14,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2022-03-20 18:28:14,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 94. [2022-03-20 18:28:14,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 89 states have (on average 1.0112359550561798) internal successors, (90), 89 states have internal predecessors, (90), 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) [2022-03-20 18:28:14,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 94 transitions. [2022-03-20 18:28:14,872 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 94 transitions. Word has length 91 [2022-03-20 18:28:14,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:28:14,872 INFO L478 AbstractCegarLoop]: Abstraction has 94 states and 94 transitions. [2022-03-20 18:28:14,872 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 1.9772727272727273) internal successors, (87), 43 states have internal predecessors, (87), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:28:14,872 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 94 transitions. [2022-03-20 18:28:14,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2022-03-20 18:28:14,873 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:28:14,873 INFO L499 BasicCegarLoop]: trace histogram [41, 41, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:28:14,873 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2022-03-20 18:28:14,873 INFO L403 AbstractCegarLoop]: === Iteration 42 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:28:14,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:28:14,873 INFO L85 PathProgramCache]: Analyzing trace with hash 110122590, now seen corresponding path program 41 times [2022-03-20 18:28:14,873 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:28:14,873 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [741405737] [2022-03-20 18:28:14,896 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 18:28:14,897 INFO L85 PathProgramCache]: Analyzing trace with hash 871685778, now seen corresponding path program 1 times [2022-03-20 18:28:14,897 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:28:14,897 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [664125676] [2022-03-20 18:28:14,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:28:14,897 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:28:14,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:28:14,911 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:28:14,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:28:14,913 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:28:14,913 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:28:14,914 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [664125676] [2022-03-20 18:28:14,914 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [664125676] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:28:14,914 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:28:14,914 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 18:28:15,689 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:28:15,690 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [741405737] [2022-03-20 18:28:15,690 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [741405737] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:28:15,690 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:28:15,690 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [45] imperfect sequences [] total 45 [2022-03-20 18:28:15,690 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1590636921] [2022-03-20 18:28:15,690 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:28:15,690 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-03-20 18:28:15,690 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:28:15,690 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-03-20 18:28:15,691 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=1893, Unknown=0, NotChecked=0, Total=1980 [2022-03-20 18:28:15,691 INFO L87 Difference]: Start difference. First operand 94 states and 94 transitions. Second operand has 45 states, 45 states have (on average 1.9777777777777779) internal successors, (89), 44 states have internal predecessors, (89), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:28:17,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:28:17,248 INFO L93 Difference]: Finished difference Result 102 states and 102 transitions. [2022-03-20 18:28:17,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-03-20 18:28:17,249 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 1.9777777777777779) internal successors, (89), 44 states have internal predecessors, (89), 2 states have call successors, (3), 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 93 [2022-03-20 18:28:17,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:28:17,249 INFO L225 Difference]: With dead ends: 102 [2022-03-20 18:28:17,249 INFO L226 Difference]: Without dead ends: 97 [2022-03-20 18:28:17,250 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 32 SyntacticMatches, 19 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 861 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=255, Invalid=7227, Unknown=0, NotChecked=0, Total=7482 [2022-03-20 18:28:17,250 INFO L913 BasicCegarLoop]: 11 mSDtfsCounter, 50 mSDsluCounter, 212 mSDsCounter, 0 mSdLazyCounter, 3781 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 223 SdHoareTripleChecker+Invalid, 3825 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 3781 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-03-20 18:28:17,250 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [50 Valid, 223 Invalid, 3825 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 3781 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-03-20 18:28:17,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2022-03-20 18:28:17,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 96. [2022-03-20 18:28:17,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 91 states have (on average 1.010989010989011) internal successors, (92), 91 states have internal predecessors, (92), 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) [2022-03-20 18:28:17,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 96 transitions. [2022-03-20 18:28:17,263 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 96 transitions. Word has length 93 [2022-03-20 18:28:17,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:28:17,263 INFO L478 AbstractCegarLoop]: Abstraction has 96 states and 96 transitions. [2022-03-20 18:28:17,263 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 1.9777777777777779) internal successors, (89), 44 states have internal predecessors, (89), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:28:17,263 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 96 transitions. [2022-03-20 18:28:17,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2022-03-20 18:28:17,264 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:28:17,264 INFO L499 BasicCegarLoop]: trace histogram [42, 42, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:28:17,264 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2022-03-20 18:28:17,264 INFO L403 AbstractCegarLoop]: === Iteration 43 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:28:17,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:28:17,264 INFO L85 PathProgramCache]: Analyzing trace with hash -444378052, now seen corresponding path program 42 times [2022-03-20 18:28:17,264 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:28:17,264 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [325050376] [2022-03-20 18:28:17,293 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 18:28:17,293 INFO L85 PathProgramCache]: Analyzing trace with hash 930791122, now seen corresponding path program 1 times [2022-03-20 18:28:17,293 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:28:17,293 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [187346919] [2022-03-20 18:28:17,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:28:17,294 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:28:17,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:28:17,311 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:28:17,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:28:17,314 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:28:17,314 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:28:17,314 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [187346919] [2022-03-20 18:28:17,314 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [187346919] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:28:17,314 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:28:17,314 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 18:28:18,229 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:28:18,229 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [325050376] [2022-03-20 18:28:18,229 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [325050376] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:28:18,229 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:28:18,229 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [46] imperfect sequences [] total 46 [2022-03-20 18:28:18,229 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [402298039] [2022-03-20 18:28:18,229 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:28:18,230 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-03-20 18:28:18,230 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:28:18,230 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-03-20 18:28:18,230 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=1981, Unknown=0, NotChecked=0, Total=2070 [2022-03-20 18:28:18,230 INFO L87 Difference]: Start difference. First operand 96 states and 96 transitions. Second operand has 46 states, 46 states have (on average 1.9782608695652173) internal successors, (91), 45 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) [2022-03-20 18:28:19,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:28:19,897 INFO L93 Difference]: Finished difference Result 104 states and 104 transitions. [2022-03-20 18:28:19,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-03-20 18:28:19,898 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 1.9782608695652173) internal successors, (91), 45 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 [2022-03-20 18:28:19,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:28:19,898 INFO L225 Difference]: With dead ends: 104 [2022-03-20 18:28:19,898 INFO L226 Difference]: Without dead ends: 99 [2022-03-20 18:28:19,899 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 25 SyntacticMatches, 27 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 903 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=261, Invalid=7571, Unknown=0, NotChecked=0, Total=7832 [2022-03-20 18:28:19,905 INFO L913 BasicCegarLoop]: 11 mSDtfsCounter, 51 mSDsluCounter, 217 mSDsCounter, 0 mSdLazyCounter, 3957 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 228 SdHoareTripleChecker+Invalid, 4002 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 3957 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-03-20 18:28:19,906 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [51 Valid, 228 Invalid, 4002 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 3957 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-03-20 18:28:19,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2022-03-20 18:28:19,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 98. [2022-03-20 18:28:19,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 93 states have (on average 1.010752688172043) internal successors, (94), 93 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) [2022-03-20 18:28:19,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 98 transitions. [2022-03-20 18:28:19,920 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 98 transitions. Word has length 95 [2022-03-20 18:28:19,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:28:19,921 INFO L478 AbstractCegarLoop]: Abstraction has 98 states and 98 transitions. [2022-03-20 18:28:19,921 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 1.9782608695652173) internal successors, (91), 45 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) [2022-03-20 18:28:19,921 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 98 transitions. [2022-03-20 18:28:19,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2022-03-20 18:28:19,922 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:28:19,922 INFO L499 BasicCegarLoop]: trace histogram [43, 43, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:28:19,922 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2022-03-20 18:28:19,922 INFO L403 AbstractCegarLoop]: === Iteration 44 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:28:19,922 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:28:19,922 INFO L85 PathProgramCache]: Analyzing trace with hash -743550310, now seen corresponding path program 43 times [2022-03-20 18:28:19,922 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:28:19,922 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [335455141] [2022-03-20 18:28:19,944 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 18:28:19,945 INFO L85 PathProgramCache]: Analyzing trace with hash 989896466, now seen corresponding path program 1 times [2022-03-20 18:28:19,945 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:28:19,945 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1350549329] [2022-03-20 18:28:19,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:28:19,945 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:28:19,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:28:19,971 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:28:19,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:28:19,977 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:28:19,978 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:28:19,978 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1350549329] [2022-03-20 18:28:19,978 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1350549329] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:28:19,978 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:28:19,978 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 18:28:20,843 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:28:20,844 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [335455141] [2022-03-20 18:28:20,844 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [335455141] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:28:20,844 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:28:20,844 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [47] imperfect sequences [] total 47 [2022-03-20 18:28:20,844 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1183840659] [2022-03-20 18:28:20,844 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:28:20,844 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2022-03-20 18:28:20,844 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:28:20,844 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2022-03-20 18:28:20,844 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=2071, Unknown=0, NotChecked=0, Total=2162 [2022-03-20 18:28:20,845 INFO L87 Difference]: Start difference. First operand 98 states and 98 transitions. Second operand has 47 states, 47 states have (on average 1.9787234042553192) internal successors, (93), 46 states have internal predecessors, (93), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:28:22,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:28:22,585 INFO L93 Difference]: Finished difference Result 106 states and 106 transitions. [2022-03-20 18:28:22,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2022-03-20 18:28:22,585 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 1.9787234042553192) internal successors, (93), 46 states have internal predecessors, (93), 2 states have call successors, (3), 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 97 [2022-03-20 18:28:22,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:28:22,586 INFO L225 Difference]: With dead ends: 106 [2022-03-20 18:28:22,586 INFO L226 Difference]: Without dead ends: 101 [2022-03-20 18:28:22,587 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 31 SyntacticMatches, 22 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 946 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=267, Invalid=7923, Unknown=0, NotChecked=0, Total=8190 [2022-03-20 18:28:22,587 INFO L913 BasicCegarLoop]: 11 mSDtfsCounter, 52 mSDsluCounter, 222 mSDsCounter, 0 mSdLazyCounter, 4137 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 233 SdHoareTripleChecker+Invalid, 4183 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 4137 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-03-20 18:28:22,587 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [52 Valid, 233 Invalid, 4183 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 4137 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-03-20 18:28:22,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2022-03-20 18:28:22,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 100. [2022-03-20 18:28:22,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 95 states have (on average 1.0105263157894737) internal successors, (96), 95 states have internal predecessors, (96), 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) [2022-03-20 18:28:22,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 100 transitions. [2022-03-20 18:28:22,610 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 100 transitions. Word has length 97 [2022-03-20 18:28:22,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:28:22,610 INFO L478 AbstractCegarLoop]: Abstraction has 100 states and 100 transitions. [2022-03-20 18:28:22,610 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 1.9787234042553192) internal successors, (93), 46 states have internal predecessors, (93), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:28:22,610 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 100 transitions. [2022-03-20 18:28:22,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2022-03-20 18:28:22,611 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:28:22,611 INFO L499 BasicCegarLoop]: trace histogram [44, 44, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:28:22,611 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2022-03-20 18:28:22,611 INFO L403 AbstractCegarLoop]: === Iteration 45 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:28:22,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:28:22,611 INFO L85 PathProgramCache]: Analyzing trace with hash -485281416, now seen corresponding path program 44 times [2022-03-20 18:28:22,611 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:28:22,611 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1174707588] [2022-03-20 18:28:22,635 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 18:28:22,635 INFO L85 PathProgramCache]: Analyzing trace with hash 1049001810, now seen corresponding path program 1 times [2022-03-20 18:28:22,635 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:28:22,635 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1720065825] [2022-03-20 18:28:22,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:28:22,635 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:28:22,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:28:22,655 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:28:22,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:28:22,659 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:28:22,660 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:28:22,660 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1720065825] [2022-03-20 18:28:22,660 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1720065825] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:28:22,660 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:28:22,660 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 18:28:23,605 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:28:23,605 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1174707588] [2022-03-20 18:28:23,605 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1174707588] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:28:23,605 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:28:23,605 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [48] imperfect sequences [] total 48 [2022-03-20 18:28:23,605 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [94340070] [2022-03-20 18:28:23,605 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:28:23,607 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2022-03-20 18:28:23,607 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:28:23,607 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2022-03-20 18:28:23,608 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=2163, Unknown=0, NotChecked=0, Total=2256 [2022-03-20 18:28:23,608 INFO L87 Difference]: Start difference. First operand 100 states and 100 transitions. Second operand has 48 states, 48 states have (on average 1.9791666666666667) internal successors, (95), 47 states have internal predecessors, (95), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:28:25,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:28:25,413 INFO L93 Difference]: Finished difference Result 108 states and 108 transitions. [2022-03-20 18:28:25,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-03-20 18:28:25,413 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 1.9791666666666667) internal successors, (95), 47 states have internal predecessors, (95), 2 states have call successors, (3), 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 99 [2022-03-20 18:28:25,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:28:25,414 INFO L225 Difference]: With dead ends: 108 [2022-03-20 18:28:25,414 INFO L226 Difference]: Without dead ends: 103 [2022-03-20 18:28:25,414 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 32 SyntacticMatches, 22 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 990 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=273, Invalid=8283, Unknown=0, NotChecked=0, Total=8556 [2022-03-20 18:28:25,415 INFO L913 BasicCegarLoop]: 11 mSDtfsCounter, 53 mSDsluCounter, 227 mSDsCounter, 0 mSdLazyCounter, 4321 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 238 SdHoareTripleChecker+Invalid, 4368 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 4321 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-03-20 18:28:25,415 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [53 Valid, 238 Invalid, 4368 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 4321 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-03-20 18:28:25,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2022-03-20 18:28:25,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 102. [2022-03-20 18:28:25,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 97 states have (on average 1.0103092783505154) internal successors, (98), 97 states have internal predecessors, (98), 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) [2022-03-20 18:28:25,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 102 transitions. [2022-03-20 18:28:25,429 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 102 transitions. Word has length 99 [2022-03-20 18:28:25,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:28:25,430 INFO L478 AbstractCegarLoop]: Abstraction has 102 states and 102 transitions. [2022-03-20 18:28:25,430 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 1.9791666666666667) internal successors, (95), 47 states have internal predecessors, (95), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:28:25,430 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 102 transitions. [2022-03-20 18:28:25,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2022-03-20 18:28:25,430 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:28:25,430 INFO L499 BasicCegarLoop]: trace histogram [45, 45, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:28:25,430 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2022-03-20 18:28:25,430 INFO L403 AbstractCegarLoop]: === Iteration 46 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:28:25,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:28:25,431 INFO L85 PathProgramCache]: Analyzing trace with hash -1396977450, now seen corresponding path program 45 times [2022-03-20 18:28:25,431 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:28:25,431 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [386772063] [2022-03-20 18:28:25,453 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 18:28:25,453 INFO L85 PathProgramCache]: Analyzing trace with hash 1108107154, now seen corresponding path program 1 times [2022-03-20 18:28:25,453 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:28:25,453 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [740942987] [2022-03-20 18:28:25,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:28:25,453 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:28:25,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:28:25,468 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:28:25,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:28:25,479 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:28:25,479 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:28:25,479 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [740942987] [2022-03-20 18:28:25,479 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [740942987] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:28:25,479 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:28:25,479 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 18:28:26,464 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:28:26,464 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [386772063] [2022-03-20 18:28:26,465 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [386772063] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:28:26,465 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:28:26,465 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [49] imperfect sequences [] total 49 [2022-03-20 18:28:26,465 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1647788320] [2022-03-20 18:28:26,465 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:28:26,465 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2022-03-20 18:28:26,465 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:28:26,465 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2022-03-20 18:28:26,465 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=2257, Unknown=0, NotChecked=0, Total=2352 [2022-03-20 18:28:26,466 INFO L87 Difference]: Start difference. First operand 102 states and 102 transitions. Second operand has 49 states, 49 states have (on average 1.9795918367346939) internal successors, (97), 48 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) [2022-03-20 18:28:28,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:28:28,340 INFO L93 Difference]: Finished difference Result 110 states and 110 transitions. [2022-03-20 18:28:28,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-03-20 18:28:28,341 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 1.9795918367346939) internal successors, (97), 48 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 [2022-03-20 18:28:28,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:28:28,341 INFO L225 Difference]: With dead ends: 110 [2022-03-20 18:28:28,341 INFO L226 Difference]: Without dead ends: 105 [2022-03-20 18:28:28,342 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 31 SyntacticMatches, 24 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1035 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=279, Invalid=8651, Unknown=0, NotChecked=0, Total=8930 [2022-03-20 18:28:28,343 INFO L913 BasicCegarLoop]: 11 mSDtfsCounter, 54 mSDsluCounter, 232 mSDsCounter, 0 mSdLazyCounter, 4509 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 243 SdHoareTripleChecker+Invalid, 4557 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 4509 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-03-20 18:28:28,343 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [54 Valid, 243 Invalid, 4557 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 4509 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-03-20 18:28:28,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2022-03-20 18:28:28,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 104. [2022-03-20 18:28:28,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 99 states have (on average 1.0101010101010102) internal successors, (100), 99 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) [2022-03-20 18:28:28,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 104 transitions. [2022-03-20 18:28:28,359 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 104 transitions. Word has length 101 [2022-03-20 18:28:28,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:28:28,359 INFO L478 AbstractCegarLoop]: Abstraction has 104 states and 104 transitions. [2022-03-20 18:28:28,359 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 1.9795918367346939) internal successors, (97), 48 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) [2022-03-20 18:28:28,359 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 104 transitions. [2022-03-20 18:28:28,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2022-03-20 18:28:28,359 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:28:28,359 INFO L499 BasicCegarLoop]: trace histogram [46, 46, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:28:28,359 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2022-03-20 18:28:28,360 INFO L403 AbstractCegarLoop]: === Iteration 47 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:28:28,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:28:28,360 INFO L85 PathProgramCache]: Analyzing trace with hash -1363537740, now seen corresponding path program 46 times [2022-03-20 18:28:28,360 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:28:28,360 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1202078615] [2022-03-20 18:28:28,383 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 18:28:28,383 INFO L85 PathProgramCache]: Analyzing trace with hash 1167212498, now seen corresponding path program 1 times [2022-03-20 18:28:28,383 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:28:28,383 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [396903825] [2022-03-20 18:28:28,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:28:28,383 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:28:28,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:28:28,397 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:28:28,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:28:28,399 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:28:28,399 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:28:28,399 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [396903825] [2022-03-20 18:28:28,399 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [396903825] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:28:28,400 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:28:28,400 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 18:28:29,309 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:28:29,309 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1202078615] [2022-03-20 18:28:29,309 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1202078615] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:28:29,309 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:28:29,309 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [50] imperfect sequences [] total 50 [2022-03-20 18:28:29,309 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1048193291] [2022-03-20 18:28:29,310 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:28:29,310 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2022-03-20 18:28:29,310 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:28:29,310 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2022-03-20 18:28:29,310 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=2353, Unknown=0, NotChecked=0, Total=2450 [2022-03-20 18:28:29,310 INFO L87 Difference]: Start difference. First operand 104 states and 104 transitions. Second operand has 50 states, 50 states have (on average 1.98) internal successors, (99), 49 states have internal predecessors, (99), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:28:31,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:28:31,252 INFO L93 Difference]: Finished difference Result 112 states and 112 transitions. [2022-03-20 18:28:31,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-03-20 18:28:31,252 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 1.98) internal successors, (99), 49 states have internal predecessors, (99), 2 states have call successors, (3), 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 103 [2022-03-20 18:28:31,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:28:31,252 INFO L225 Difference]: With dead ends: 112 [2022-03-20 18:28:31,253 INFO L226 Difference]: Without dead ends: 107 [2022-03-20 18:28:31,253 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 38 SyntacticMatches, 18 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1081 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=285, Invalid=9027, Unknown=0, NotChecked=0, Total=9312 [2022-03-20 18:28:31,254 INFO L913 BasicCegarLoop]: 11 mSDtfsCounter, 55 mSDsluCounter, 237 mSDsCounter, 0 mSdLazyCounter, 4701 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 248 SdHoareTripleChecker+Invalid, 4750 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 4701 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-03-20 18:28:31,254 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [55 Valid, 248 Invalid, 4750 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 4701 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-03-20 18:28:31,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2022-03-20 18:28:31,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 106. [2022-03-20 18:28:31,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 101 states have (on average 1.00990099009901) internal successors, (102), 101 states have internal predecessors, (102), 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) [2022-03-20 18:28:31,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 106 transitions. [2022-03-20 18:28:31,269 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 106 transitions. Word has length 103 [2022-03-20 18:28:31,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:28:31,270 INFO L478 AbstractCegarLoop]: Abstraction has 106 states and 106 transitions. [2022-03-20 18:28:31,270 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 1.98) internal successors, (99), 49 states have internal predecessors, (99), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:28:31,270 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 106 transitions. [2022-03-20 18:28:31,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2022-03-20 18:28:31,270 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:28:31,270 INFO L499 BasicCegarLoop]: trace histogram [47, 47, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:28:31,270 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2022-03-20 18:28:31,270 INFO L403 AbstractCegarLoop]: === Iteration 48 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:28:31,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:28:31,270 INFO L85 PathProgramCache]: Analyzing trace with hash 707252498, now seen corresponding path program 47 times [2022-03-20 18:28:31,271 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:28:31,271 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [191409812] [2022-03-20 18:28:31,295 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 18:28:31,296 INFO L85 PathProgramCache]: Analyzing trace with hash 1226317842, now seen corresponding path program 1 times [2022-03-20 18:28:31,296 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:28:31,296 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [428017249] [2022-03-20 18:28:31,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:28:31,296 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:28:31,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:28:31,309 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:28:31,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:28:31,320 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:28:31,320 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:28:31,320 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [428017249] [2022-03-20 18:28:31,320 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [428017249] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:28:31,320 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:28:31,320 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 18:28:32,337 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:28:32,338 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [191409812] [2022-03-20 18:28:32,338 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [191409812] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:28:32,338 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:28:32,338 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [51] imperfect sequences [] total 51 [2022-03-20 18:28:32,338 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1837051384] [2022-03-20 18:28:32,338 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:28:32,339 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2022-03-20 18:28:32,339 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:28:32,339 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2022-03-20 18:28:32,339 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=2451, Unknown=0, NotChecked=0, Total=2550 [2022-03-20 18:28:32,340 INFO L87 Difference]: Start difference. First operand 106 states and 106 transitions. Second operand has 51 states, 51 states have (on average 1.9803921568627452) internal successors, (101), 50 states have internal predecessors, (101), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:28:34,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:28:34,355 INFO L93 Difference]: Finished difference Result 114 states and 114 transitions. [2022-03-20 18:28:34,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-03-20 18:28:34,356 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 1.9803921568627452) internal successors, (101), 50 states have internal predecessors, (101), 2 states have call successors, (3), 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 105 [2022-03-20 18:28:34,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:28:34,356 INFO L225 Difference]: With dead ends: 114 [2022-03-20 18:28:34,356 INFO L226 Difference]: Without dead ends: 109 [2022-03-20 18:28:34,357 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 32 SyntacticMatches, 25 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1128 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=291, Invalid=9411, Unknown=0, NotChecked=0, Total=9702 [2022-03-20 18:28:34,357 INFO L913 BasicCegarLoop]: 11 mSDtfsCounter, 56 mSDsluCounter, 242 mSDsCounter, 0 mSdLazyCounter, 4897 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 253 SdHoareTripleChecker+Invalid, 4947 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 4897 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-03-20 18:28:34,357 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [56 Valid, 253 Invalid, 4947 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 4897 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-03-20 18:28:34,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2022-03-20 18:28:34,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 108. [2022-03-20 18:28:34,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 103 states have (on average 1.0097087378640777) internal successors, (104), 103 states have internal predecessors, (104), 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) [2022-03-20 18:28:34,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 108 transitions. [2022-03-20 18:28:34,375 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 108 transitions. Word has length 105 [2022-03-20 18:28:34,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:28:34,375 INFO L478 AbstractCegarLoop]: Abstraction has 108 states and 108 transitions. [2022-03-20 18:28:34,376 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 1.9803921568627452) internal successors, (101), 50 states have internal predecessors, (101), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:28:34,376 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 108 transitions. [2022-03-20 18:28:34,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2022-03-20 18:28:34,376 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:28:34,376 INFO L499 BasicCegarLoop]: trace histogram [48, 48, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:28:34,376 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2022-03-20 18:28:34,376 INFO L403 AbstractCegarLoop]: === Iteration 49 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:28:34,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:28:34,376 INFO L85 PathProgramCache]: Analyzing trace with hash -2128154128, now seen corresponding path program 48 times [2022-03-20 18:28:34,376 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:28:34,377 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [929780352] [2022-03-20 18:28:34,397 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 18:28:34,397 INFO L85 PathProgramCache]: Analyzing trace with hash 1285423186, now seen corresponding path program 1 times [2022-03-20 18:28:34,397 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:28:34,397 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1035605772] [2022-03-20 18:28:34,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:28:34,397 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:28:34,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:28:34,411 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:28:34,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:28:34,415 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:28:34,415 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:28:34,415 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1035605772] [2022-03-20 18:28:34,415 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1035605772] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:28:34,415 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:28:34,415 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 18:28:35,653 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:28:35,654 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [929780352] [2022-03-20 18:28:35,654 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [929780352] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:28:35,654 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:28:35,654 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [52] imperfect sequences [] total 52 [2022-03-20 18:28:35,654 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1059386427] [2022-03-20 18:28:35,654 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:28:35,654 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2022-03-20 18:28:35,654 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:28:35,654 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2022-03-20 18:28:35,655 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=2551, Unknown=0, NotChecked=0, Total=2652 [2022-03-20 18:28:35,655 INFO L87 Difference]: Start difference. First operand 108 states and 108 transitions. Second operand has 52 states, 52 states have (on average 1.9807692307692308) internal successors, (103), 51 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) [2022-03-20 18:28:37,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:28:37,811 INFO L93 Difference]: Finished difference Result 116 states and 116 transitions. [2022-03-20 18:28:37,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2022-03-20 18:28:37,811 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 1.9807692307692308) internal successors, (103), 51 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 [2022-03-20 18:28:37,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:28:37,812 INFO L225 Difference]: With dead ends: 116 [2022-03-20 18:28:37,812 INFO L226 Difference]: Without dead ends: 111 [2022-03-20 18:28:37,813 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 28 SyntacticMatches, 30 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1176 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=297, Invalid=9803, Unknown=0, NotChecked=0, Total=10100 [2022-03-20 18:28:37,813 INFO L913 BasicCegarLoop]: 11 mSDtfsCounter, 57 mSDsluCounter, 247 mSDsCounter, 0 mSdLazyCounter, 5097 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 258 SdHoareTripleChecker+Invalid, 5148 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 5097 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-03-20 18:28:37,813 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [57 Valid, 258 Invalid, 5148 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 5097 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-03-20 18:28:37,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2022-03-20 18:28:37,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 110. [2022-03-20 18:28:37,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 105 states have (on average 1.0095238095238095) internal successors, (106), 105 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) [2022-03-20 18:28:37,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 110 transitions. [2022-03-20 18:28:37,831 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 110 transitions. Word has length 107 [2022-03-20 18:28:37,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:28:37,831 INFO L478 AbstractCegarLoop]: Abstraction has 110 states and 110 transitions. [2022-03-20 18:28:37,831 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 52 states have (on average 1.9807692307692308) internal successors, (103), 51 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) [2022-03-20 18:28:37,831 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 110 transitions. [2022-03-20 18:28:37,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2022-03-20 18:28:37,831 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:28:37,831 INFO L499 BasicCegarLoop]: trace histogram [49, 49, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:28:37,831 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2022-03-20 18:28:37,833 INFO L403 AbstractCegarLoop]: === Iteration 50 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:28:37,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:28:37,833 INFO L85 PathProgramCache]: Analyzing trace with hash 350311246, now seen corresponding path program 49 times [2022-03-20 18:28:37,833 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:28:37,833 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1726585696] [2022-03-20 18:28:37,854 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 18:28:37,854 INFO L85 PathProgramCache]: Analyzing trace with hash 1344528530, now seen corresponding path program 1 times [2022-03-20 18:28:37,854 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:28:37,854 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2034282106] [2022-03-20 18:28:37,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:28:37,854 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:28:37,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:28:37,867 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:28:37,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:28:37,871 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:28:37,872 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:28:37,872 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2034282106] [2022-03-20 18:28:37,872 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2034282106] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:28:37,872 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:28:37,872 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 18:28:39,012 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:28:39,012 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1726585696] [2022-03-20 18:28:39,012 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1726585696] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:28:39,012 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:28:39,013 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [53] imperfect sequences [] total 53 [2022-03-20 18:28:39,013 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [733689788] [2022-03-20 18:28:39,013 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:28:39,013 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2022-03-20 18:28:39,013 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:28:39,013 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2022-03-20 18:28:39,013 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=2653, Unknown=0, NotChecked=0, Total=2756 [2022-03-20 18:28:39,013 INFO L87 Difference]: Start difference. First operand 110 states and 110 transitions. Second operand has 53 states, 53 states have (on average 1.9811320754716981) internal successors, (105), 52 states have internal predecessors, (105), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:28:41,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:28:41,261 INFO L93 Difference]: Finished difference Result 118 states and 118 transitions. [2022-03-20 18:28:41,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-03-20 18:28:41,262 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 1.9811320754716981) internal successors, (105), 52 states have internal predecessors, (105), 2 states have call successors, (3), 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 109 [2022-03-20 18:28:41,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:28:41,262 INFO L225 Difference]: With dead ends: 118 [2022-03-20 18:28:41,262 INFO L226 Difference]: Without dead ends: 113 [2022-03-20 18:28:41,263 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 36 SyntacticMatches, 23 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1225 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=303, Invalid=10203, Unknown=0, NotChecked=0, Total=10506 [2022-03-20 18:28:41,263 INFO L913 BasicCegarLoop]: 11 mSDtfsCounter, 58 mSDsluCounter, 252 mSDsCounter, 0 mSdLazyCounter, 5301 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 263 SdHoareTripleChecker+Invalid, 5353 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 5301 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-03-20 18:28:41,263 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [58 Valid, 263 Invalid, 5353 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 5301 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-03-20 18:28:41,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2022-03-20 18:28:41,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 112. [2022-03-20 18:28:41,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 107 states have (on average 1.0093457943925233) internal successors, (108), 107 states have internal predecessors, (108), 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) [2022-03-20 18:28:41,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 112 transitions. [2022-03-20 18:28:41,288 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 112 transitions. Word has length 109 [2022-03-20 18:28:41,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:28:41,288 INFO L478 AbstractCegarLoop]: Abstraction has 112 states and 112 transitions. [2022-03-20 18:28:41,288 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 1.9811320754716981) internal successors, (105), 52 states have internal predecessors, (105), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:28:41,288 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 112 transitions. [2022-03-20 18:28:41,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2022-03-20 18:28:41,289 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:28:41,289 INFO L499 BasicCegarLoop]: trace histogram [50, 50, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:28:41,289 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2022-03-20 18:28:41,289 INFO L403 AbstractCegarLoop]: === Iteration 51 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:28:41,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:28:41,289 INFO L85 PathProgramCache]: Analyzing trace with hash -1551313620, now seen corresponding path program 50 times [2022-03-20 18:28:41,289 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:28:41,289 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [995888759] [2022-03-20 18:28:41,311 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 18:28:41,311 INFO L85 PathProgramCache]: Analyzing trace with hash 1403633874, now seen corresponding path program 1 times [2022-03-20 18:28:41,311 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:28:41,312 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [432077747] [2022-03-20 18:28:41,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:28:41,312 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:28:41,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:28:41,328 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:28:41,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:28:41,331 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:28:41,331 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:28:41,331 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [432077747] [2022-03-20 18:28:41,331 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [432077747] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:28:41,331 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:28:41,331 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 18:28:42,644 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:28:42,644 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [995888759] [2022-03-20 18:28:42,644 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [995888759] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:28:42,644 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:28:42,644 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [54] imperfect sequences [] total 54 [2022-03-20 18:28:42,644 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [587099889] [2022-03-20 18:28:42,644 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:28:42,644 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2022-03-20 18:28:42,644 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:28:42,645 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2022-03-20 18:28:42,645 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=2757, Unknown=0, NotChecked=0, Total=2862 [2022-03-20 18:28:42,645 INFO L87 Difference]: Start difference. First operand 112 states and 112 transitions. Second operand has 54 states, 54 states have (on average 1.9814814814814814) internal successors, (107), 53 states have internal predecessors, (107), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:28:44,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:28:44,974 INFO L93 Difference]: Finished difference Result 120 states and 120 transitions. [2022-03-20 18:28:44,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2022-03-20 18:28:44,975 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 1.9814814814814814) internal successors, (107), 53 states have internal predecessors, (107), 2 states have call successors, (3), 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 111 [2022-03-20 18:28:44,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:28:44,975 INFO L225 Difference]: With dead ends: 120 [2022-03-20 18:28:44,975 INFO L226 Difference]: Without dead ends: 115 [2022-03-20 18:28:44,976 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 27 SyntacticMatches, 33 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1275 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=309, Invalid=10611, Unknown=0, NotChecked=0, Total=10920 [2022-03-20 18:28:44,976 INFO L913 BasicCegarLoop]: 11 mSDtfsCounter, 59 mSDsluCounter, 257 mSDsCounter, 0 mSdLazyCounter, 5509 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 268 SdHoareTripleChecker+Invalid, 5562 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 5509 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-03-20 18:28:44,976 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [59 Valid, 268 Invalid, 5562 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 5509 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-03-20 18:28:44,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2022-03-20 18:28:44,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 114. [2022-03-20 18:28:44,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 109 states have (on average 1.0091743119266054) internal successors, (110), 109 states have internal predecessors, (110), 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) [2022-03-20 18:28:44,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 114 transitions. [2022-03-20 18:28:44,994 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 114 transitions. Word has length 111 [2022-03-20 18:28:44,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:28:44,995 INFO L478 AbstractCegarLoop]: Abstraction has 114 states and 114 transitions. [2022-03-20 18:28:44,995 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 54 states have (on average 1.9814814814814814) internal successors, (107), 53 states have internal predecessors, (107), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:28:44,995 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 114 transitions. [2022-03-20 18:28:44,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2022-03-20 18:28:44,995 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:28:44,995 INFO L499 BasicCegarLoop]: trace histogram [51, 51, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:28:44,995 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2022-03-20 18:28:44,996 INFO L403 AbstractCegarLoop]: === Iteration 52 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:28:44,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:28:44,996 INFO L85 PathProgramCache]: Analyzing trace with hash 643258250, now seen corresponding path program 51 times [2022-03-20 18:28:44,996 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:28:44,996 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [330639882] [2022-03-20 18:28:45,018 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 18:28:45,018 INFO L85 PathProgramCache]: Analyzing trace with hash 1462739218, now seen corresponding path program 1 times [2022-03-20 18:28:45,018 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:28:45,018 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1405790302] [2022-03-20 18:28:45,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:28:45,018 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:28:45,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:28:45,039 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:28:45,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:28:45,042 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:28:45,042 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:28:45,042 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1405790302] [2022-03-20 18:28:45,042 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1405790302] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:28:45,042 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:28:45,042 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 18:28:46,255 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:28:46,255 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [330639882] [2022-03-20 18:28:46,255 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [330639882] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:28:46,255 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:28:46,256 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [55] imperfect sequences [] total 55 [2022-03-20 18:28:46,256 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [520964910] [2022-03-20 18:28:46,256 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:28:46,256 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2022-03-20 18:28:46,256 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:28:46,256 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2022-03-20 18:28:46,256 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=2863, Unknown=0, NotChecked=0, Total=2970 [2022-03-20 18:28:46,256 INFO L87 Difference]: Start difference. First operand 114 states and 114 transitions. Second operand has 55 states, 55 states have (on average 1.981818181818182) internal successors, (109), 54 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) [2022-03-20 18:28:48,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:28:48,614 INFO L93 Difference]: Finished difference Result 122 states and 122 transitions. [2022-03-20 18:28:48,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-03-20 18:28:48,614 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 55 states have (on average 1.981818181818182) internal successors, (109), 54 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 [2022-03-20 18:28:48,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:28:48,615 INFO L225 Difference]: With dead ends: 122 [2022-03-20 18:28:48,615 INFO L226 Difference]: Without dead ends: 117 [2022-03-20 18:28:48,615 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 35 SyntacticMatches, 26 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1326 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=315, Invalid=11027, Unknown=0, NotChecked=0, Total=11342 [2022-03-20 18:28:48,620 INFO L913 BasicCegarLoop]: 11 mSDtfsCounter, 60 mSDsluCounter, 262 mSDsCounter, 0 mSdLazyCounter, 5721 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 273 SdHoareTripleChecker+Invalid, 5775 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 5721 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-03-20 18:28:48,620 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [60 Valid, 273 Invalid, 5775 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 5721 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-03-20 18:28:48,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2022-03-20 18:28:48,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 116. [2022-03-20 18:28:48,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 111 states have (on average 1.009009009009009) internal successors, (112), 111 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) [2022-03-20 18:28:48,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 116 transitions. [2022-03-20 18:28:48,643 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 116 transitions. Word has length 113 [2022-03-20 18:28:48,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:28:48,643 INFO L478 AbstractCegarLoop]: Abstraction has 116 states and 116 transitions. [2022-03-20 18:28:48,643 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 55 states have (on average 1.981818181818182) internal successors, (109), 54 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) [2022-03-20 18:28:48,643 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 116 transitions. [2022-03-20 18:28:48,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2022-03-20 18:28:48,644 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:28:48,644 INFO L499 BasicCegarLoop]: trace histogram [52, 52, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:28:48,644 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2022-03-20 18:28:48,644 INFO L403 AbstractCegarLoop]: === Iteration 53 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:28:48,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:28:48,644 INFO L85 PathProgramCache]: Analyzing trace with hash 797882984, now seen corresponding path program 52 times [2022-03-20 18:28:48,644 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:28:48,644 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1613785860] [2022-03-20 18:28:48,668 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 18:28:48,669 INFO L85 PathProgramCache]: Analyzing trace with hash 1521844562, now seen corresponding path program 1 times [2022-03-20 18:28:48,669 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:28:48,669 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [618281531] [2022-03-20 18:28:48,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:28:48,669 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:28:48,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:28:48,696 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:28:48,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:28:48,698 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:28:48,698 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:28:48,698 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [618281531] [2022-03-20 18:28:48,698 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [618281531] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:28:48,698 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:28:48,698 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 18:28:49,862 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:28:49,862 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1613785860] [2022-03-20 18:28:49,862 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1613785860] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:28:49,862 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:28:49,862 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [56] imperfect sequences [] total 56 [2022-03-20 18:28:49,862 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [707934120] [2022-03-20 18:28:49,862 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:28:49,862 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2022-03-20 18:28:49,862 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:28:49,863 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2022-03-20 18:28:49,863 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=2971, Unknown=0, NotChecked=0, Total=3080 [2022-03-20 18:28:49,863 INFO L87 Difference]: Start difference. First operand 116 states and 116 transitions. Second operand has 56 states, 56 states have (on average 1.9821428571428572) internal successors, (111), 55 states have internal predecessors, (111), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:28:52,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:28:52,406 INFO L93 Difference]: Finished difference Result 124 states and 124 transitions. [2022-03-20 18:28:52,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2022-03-20 18:28:52,406 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 56 states have (on average 1.9821428571428572) internal successors, (111), 55 states have internal predecessors, (111), 2 states have call successors, (3), 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 115 [2022-03-20 18:28:52,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:28:52,407 INFO L225 Difference]: With dead ends: 124 [2022-03-20 18:28:52,407 INFO L226 Difference]: Without dead ends: 119 [2022-03-20 18:28:52,408 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 42 SyntacticMatches, 20 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1378 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=321, Invalid=11451, Unknown=0, NotChecked=0, Total=11772 [2022-03-20 18:28:52,408 INFO L913 BasicCegarLoop]: 11 mSDtfsCounter, 61 mSDsluCounter, 267 mSDsCounter, 0 mSdLazyCounter, 5937 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 278 SdHoareTripleChecker+Invalid, 5992 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 5937 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-03-20 18:28:52,408 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [61 Valid, 278 Invalid, 5992 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 5937 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-03-20 18:28:52,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2022-03-20 18:28:52,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 118. [2022-03-20 18:28:52,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118 states, 113 states have (on average 1.008849557522124) internal successors, (114), 113 states have internal predecessors, (114), 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) [2022-03-20 18:28:52,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 118 transitions. [2022-03-20 18:28:52,427 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 118 transitions. Word has length 115 [2022-03-20 18:28:52,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:28:52,428 INFO L478 AbstractCegarLoop]: Abstraction has 118 states and 118 transitions. [2022-03-20 18:28:52,428 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 56 states have (on average 1.9821428571428572) internal successors, (111), 55 states have internal predecessors, (111), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:28:52,428 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 118 transitions. [2022-03-20 18:28:52,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2022-03-20 18:28:52,428 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:28:52,428 INFO L499 BasicCegarLoop]: trace histogram [53, 53, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:28:52,428 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2022-03-20 18:28:52,428 INFO L403 AbstractCegarLoop]: === Iteration 54 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:28:52,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:28:52,429 INFO L85 PathProgramCache]: Analyzing trace with hash -931603002, now seen corresponding path program 53 times [2022-03-20 18:28:52,429 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:28:52,429 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1667524610] [2022-03-20 18:28:52,451 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 18:28:52,452 INFO L85 PathProgramCache]: Analyzing trace with hash 1580949906, now seen corresponding path program 1 times [2022-03-20 18:28:52,452 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:28:52,452 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1817693640] [2022-03-20 18:28:52,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:28:52,452 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:28:52,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:28:52,465 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:28:52,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:28:52,467 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:28:52,467 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:28:52,467 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1817693640] [2022-03-20 18:28:52,467 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1817693640] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:28:52,467 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:28:52,467 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 18:28:53,885 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:28:53,885 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1667524610] [2022-03-20 18:28:53,885 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1667524610] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:28:53,885 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:28:53,885 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [57] imperfect sequences [] total 57 [2022-03-20 18:28:53,885 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1788076931] [2022-03-20 18:28:53,885 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:28:53,886 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2022-03-20 18:28:53,886 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:28:53,886 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2022-03-20 18:28:53,886 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=3081, Unknown=0, NotChecked=0, Total=3192 [2022-03-20 18:28:53,886 INFO L87 Difference]: Start difference. First operand 118 states and 118 transitions. Second operand has 57 states, 57 states have (on average 1.9824561403508771) internal successors, (113), 56 states have internal predecessors, (113), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:28:56,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:28:56,470 INFO L93 Difference]: Finished difference Result 126 states and 126 transitions. [2022-03-20 18:28:56,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2022-03-20 18:28:56,470 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 57 states have (on average 1.9824561403508771) internal successors, (113), 56 states have internal predecessors, (113), 2 states have call successors, (3), 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 117 [2022-03-20 18:28:56,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:28:56,471 INFO L225 Difference]: With dead ends: 126 [2022-03-20 18:28:56,471 INFO L226 Difference]: Without dead ends: 121 [2022-03-20 18:28:56,472 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 31 SyntacticMatches, 32 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1431 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=327, Invalid=11883, Unknown=0, NotChecked=0, Total=12210 [2022-03-20 18:28:56,472 INFO L913 BasicCegarLoop]: 11 mSDtfsCounter, 62 mSDsluCounter, 272 mSDsCounter, 0 mSdLazyCounter, 6157 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 283 SdHoareTripleChecker+Invalid, 6213 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 6157 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-03-20 18:28:56,472 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [62 Valid, 283 Invalid, 6213 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 6157 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-03-20 18:28:56,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2022-03-20 18:28:56,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 120. [2022-03-20 18:28:56,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 115 states have (on average 1.008695652173913) internal successors, (116), 115 states have internal predecessors, (116), 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) [2022-03-20 18:28:56,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 120 transitions. [2022-03-20 18:28:56,492 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 120 transitions. Word has length 117 [2022-03-20 18:28:56,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:28:56,492 INFO L478 AbstractCegarLoop]: Abstraction has 120 states and 120 transitions. [2022-03-20 18:28:56,492 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 57 states have (on average 1.9824561403508771) internal successors, (113), 56 states have internal predecessors, (113), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:28:56,492 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 120 transitions. [2022-03-20 18:28:56,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2022-03-20 18:28:56,493 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:28:56,493 INFO L499 BasicCegarLoop]: trace histogram [54, 54, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:28:56,493 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2022-03-20 18:28:56,493 INFO L403 AbstractCegarLoop]: === Iteration 55 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:28:56,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:28:56,493 INFO L85 PathProgramCache]: Analyzing trace with hash -815291996, now seen corresponding path program 54 times [2022-03-20 18:28:56,493 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:28:56,493 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1851162543] [2022-03-20 18:28:56,514 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 18:28:56,514 INFO L85 PathProgramCache]: Analyzing trace with hash 1640055250, now seen corresponding path program 1 times [2022-03-20 18:28:56,515 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:28:56,515 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [415754990] [2022-03-20 18:28:56,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:28:56,515 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:28:56,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:28:56,525 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:28:56,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:28:56,528 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:28:56,528 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:28:56,528 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [415754990] [2022-03-20 18:28:56,528 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [415754990] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:28:56,528 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:28:56,528 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 18:28:57,857 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:28:57,858 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1851162543] [2022-03-20 18:28:57,858 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1851162543] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:28:57,858 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:28:57,858 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [58] imperfect sequences [] total 58 [2022-03-20 18:28:57,858 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [506382590] [2022-03-20 18:28:57,858 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:28:57,858 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2022-03-20 18:28:57,858 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:28:57,859 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2022-03-20 18:28:57,859 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=3193, Unknown=0, NotChecked=0, Total=3306 [2022-03-20 18:28:57,859 INFO L87 Difference]: Start difference. First operand 120 states and 120 transitions. Second operand has 58 states, 58 states have (on average 1.9827586206896552) internal successors, (115), 57 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) [2022-03-20 18:29:00,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:29:00,533 INFO L93 Difference]: Finished difference Result 128 states and 128 transitions. [2022-03-20 18:29:00,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2022-03-20 18:29:00,534 INFO L78 Accepts]: Start accepts. Automaton has has 58 states, 58 states have (on average 1.9827586206896552) internal successors, (115), 57 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 [2022-03-20 18:29:00,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:29:00,534 INFO L225 Difference]: With dead ends: 128 [2022-03-20 18:29:00,534 INFO L226 Difference]: Without dead ends: 123 [2022-03-20 18:29:00,535 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 39 SyntacticMatches, 25 SemanticMatches, 111 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1485 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=333, Invalid=12323, Unknown=0, NotChecked=0, Total=12656 [2022-03-20 18:29:00,536 INFO L913 BasicCegarLoop]: 11 mSDtfsCounter, 63 mSDsluCounter, 277 mSDsCounter, 0 mSdLazyCounter, 6381 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 288 SdHoareTripleChecker+Invalid, 6438 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 6381 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-03-20 18:29:00,536 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [63 Valid, 288 Invalid, 6438 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 6381 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-03-20 18:29:00,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2022-03-20 18:29:00,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 122. [2022-03-20 18:29:00,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122 states, 117 states have (on average 1.0085470085470085) internal successors, (118), 117 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) [2022-03-20 18:29:00,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 122 transitions. [2022-03-20 18:29:00,567 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 122 transitions. Word has length 119 [2022-03-20 18:29:00,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:29:00,568 INFO L478 AbstractCegarLoop]: Abstraction has 122 states and 122 transitions. [2022-03-20 18:29:00,568 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 58 states, 58 states have (on average 1.9827586206896552) internal successors, (115), 57 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) [2022-03-20 18:29:00,568 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 122 transitions. [2022-03-20 18:29:00,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2022-03-20 18:29:00,568 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:29:00,568 INFO L499 BasicCegarLoop]: trace histogram [55, 55, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:29:00,568 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2022-03-20 18:29:00,568 INFO L403 AbstractCegarLoop]: === Iteration 56 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:29:00,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:29:00,569 INFO L85 PathProgramCache]: Analyzing trace with hash -709564926, now seen corresponding path program 55 times [2022-03-20 18:29:00,569 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:29:00,569 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1448375816] [2022-03-20 18:29:00,588 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 18:29:00,589 INFO L85 PathProgramCache]: Analyzing trace with hash 1699160594, now seen corresponding path program 1 times [2022-03-20 18:29:00,589 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:29:00,589 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [506008190] [2022-03-20 18:29:00,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:29:00,589 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:29:00,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:29:00,602 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:29:00,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:29:00,605 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:29:00,605 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:29:00,605 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [506008190] [2022-03-20 18:29:00,605 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [506008190] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:29:00,605 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:29:00,605 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 18:29:01,972 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:29:01,972 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1448375816] [2022-03-20 18:29:01,972 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1448375816] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:29:01,972 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:29:01,972 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [59] imperfect sequences [] total 59 [2022-03-20 18:29:01,972 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1804865997] [2022-03-20 18:29:01,972 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:29:01,972 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2022-03-20 18:29:01,972 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:29:01,973 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2022-03-20 18:29:01,973 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=3307, Unknown=0, NotChecked=0, Total=3422 [2022-03-20 18:29:01,973 INFO L87 Difference]: Start difference. First operand 122 states and 122 transitions. Second operand has 59 states, 59 states have (on average 1.9830508474576272) internal successors, (117), 58 states have internal predecessors, (117), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:29:04,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:29:04,693 INFO L93 Difference]: Finished difference Result 130 states and 130 transitions. [2022-03-20 18:29:04,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2022-03-20 18:29:04,693 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 59 states have (on average 1.9830508474576272) internal successors, (117), 58 states have internal predecessors, (117), 2 states have call successors, (3), 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 121 [2022-03-20 18:29:04,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:29:04,694 INFO L225 Difference]: With dead ends: 130 [2022-03-20 18:29:04,694 INFO L226 Difference]: Without dead ends: 125 [2022-03-20 18:29:04,694 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 40 SyntacticMatches, 25 SemanticMatches, 113 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1540 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=339, Invalid=12771, Unknown=0, NotChecked=0, Total=13110 [2022-03-20 18:29:04,695 INFO L913 BasicCegarLoop]: 11 mSDtfsCounter, 64 mSDsluCounter, 282 mSDsCounter, 0 mSdLazyCounter, 6609 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 293 SdHoareTripleChecker+Invalid, 6667 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 6609 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-03-20 18:29:04,695 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [64 Valid, 293 Invalid, 6667 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 6609 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-03-20 18:29:04,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2022-03-20 18:29:04,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 124. [2022-03-20 18:29:04,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 119 states have (on average 1.0084033613445378) internal successors, (120), 119 states have internal predecessors, (120), 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) [2022-03-20 18:29:04,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 124 transitions. [2022-03-20 18:29:04,716 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 124 transitions. Word has length 121 [2022-03-20 18:29:04,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:29:04,716 INFO L478 AbstractCegarLoop]: Abstraction has 124 states and 124 transitions. [2022-03-20 18:29:04,716 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 59 states have (on average 1.9830508474576272) internal successors, (117), 58 states have internal predecessors, (117), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:29:04,716 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 124 transitions. [2022-03-20 18:29:04,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2022-03-20 18:29:04,716 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:29:04,717 INFO L499 BasicCegarLoop]: trace histogram [56, 56, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:29:04,717 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2022-03-20 18:29:04,717 INFO L403 AbstractCegarLoop]: === Iteration 57 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:29:04,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:29:04,717 INFO L85 PathProgramCache]: Analyzing trace with hash 2109901536, now seen corresponding path program 56 times [2022-03-20 18:29:04,717 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:29:04,717 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2088369506] [2022-03-20 18:29:04,737 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 18:29:04,737 INFO L85 PathProgramCache]: Analyzing trace with hash 1758265938, now seen corresponding path program 1 times [2022-03-20 18:29:04,737 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:29:04,737 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1195864223] [2022-03-20 18:29:04,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:29:04,737 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:29:04,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:29:04,750 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:29:04,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:29:04,752 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:29:04,752 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:29:04,752 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1195864223] [2022-03-20 18:29:04,752 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1195864223] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:29:04,753 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:29:04,753 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 18:29:06,242 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:29:06,243 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2088369506] [2022-03-20 18:29:06,243 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2088369506] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:29:06,243 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:29:06,243 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [60] imperfect sequences [] total 60 [2022-03-20 18:29:06,243 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1046318064] [2022-03-20 18:29:06,243 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:29:06,243 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 60 states [2022-03-20 18:29:06,243 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:29:06,243 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2022-03-20 18:29:06,244 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=3423, Unknown=0, NotChecked=0, Total=3540 [2022-03-20 18:29:06,244 INFO L87 Difference]: Start difference. First operand 124 states and 124 transitions. Second operand has 60 states, 60 states have (on average 1.9833333333333334) internal successors, (119), 59 states have internal predecessors, (119), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:29:09,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:29:09,067 INFO L93 Difference]: Finished difference Result 132 states and 132 transitions. [2022-03-20 18:29:09,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2022-03-20 18:29:09,068 INFO L78 Accepts]: Start accepts. Automaton has has 60 states, 60 states have (on average 1.9833333333333334) internal successors, (119), 59 states have internal predecessors, (119), 2 states have call successors, (3), 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 123 [2022-03-20 18:29:09,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:29:09,068 INFO L225 Difference]: With dead ends: 132 [2022-03-20 18:29:09,068 INFO L226 Difference]: Without dead ends: 127 [2022-03-20 18:29:09,069 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 40 SyntacticMatches, 26 SemanticMatches, 115 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1596 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=345, Invalid=13227, Unknown=0, NotChecked=0, Total=13572 [2022-03-20 18:29:09,070 INFO L913 BasicCegarLoop]: 11 mSDtfsCounter, 65 mSDsluCounter, 287 mSDsCounter, 0 mSdLazyCounter, 6841 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 298 SdHoareTripleChecker+Invalid, 6900 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 6841 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-03-20 18:29:09,070 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [65 Valid, 298 Invalid, 6900 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 6841 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-03-20 18:29:09,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2022-03-20 18:29:09,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 126. [2022-03-20 18:29:09,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 121 states have (on average 1.0082644628099173) internal successors, (122), 121 states have internal predecessors, (122), 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) [2022-03-20 18:29:09,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 126 transitions. [2022-03-20 18:29:09,092 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 126 transitions. Word has length 123 [2022-03-20 18:29:09,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:29:09,092 INFO L478 AbstractCegarLoop]: Abstraction has 126 states and 126 transitions. [2022-03-20 18:29:09,092 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 60 states, 60 states have (on average 1.9833333333333334) internal successors, (119), 59 states have internal predecessors, (119), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:29:09,092 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 126 transitions. [2022-03-20 18:29:09,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2022-03-20 18:29:09,093 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:29:09,093 INFO L499 BasicCegarLoop]: trace histogram [57, 57, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:29:09,093 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2022-03-20 18:29:09,093 INFO L403 AbstractCegarLoop]: === Iteration 58 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:29:09,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:29:09,093 INFO L85 PathProgramCache]: Analyzing trace with hash 1492807742, now seen corresponding path program 57 times [2022-03-20 18:29:09,093 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:29:09,093 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1674475335] [2022-03-20 18:29:09,113 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 18:29:09,113 INFO L85 PathProgramCache]: Analyzing trace with hash 1817371282, now seen corresponding path program 1 times [2022-03-20 18:29:09,113 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:29:09,113 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1804550667] [2022-03-20 18:29:09,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:29:09,113 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:29:09,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:29:09,125 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:29:09,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:29:09,127 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:29:09,127 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:29:09,127 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1804550667] [2022-03-20 18:29:09,127 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1804550667] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:29:09,127 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:29:09,127 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 18:29:10,554 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:29:10,554 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1674475335] [2022-03-20 18:29:10,554 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1674475335] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:29:10,554 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:29:10,554 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [61] imperfect sequences [] total 61 [2022-03-20 18:29:10,554 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [90263858] [2022-03-20 18:29:10,554 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:29:10,555 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 61 states [2022-03-20 18:29:10,555 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:29:10,555 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2022-03-20 18:29:10,555 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=3541, Unknown=0, NotChecked=0, Total=3660 [2022-03-20 18:29:10,555 INFO L87 Difference]: Start difference. First operand 126 states and 126 transitions. Second operand has 61 states, 61 states have (on average 1.9836065573770492) internal successors, (121), 60 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) [2022-03-20 18:29:13,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:29:13,497 INFO L93 Difference]: Finished difference Result 134 states and 134 transitions. [2022-03-20 18:29:13,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2022-03-20 18:29:13,497 INFO L78 Accepts]: Start accepts. Automaton has has 61 states, 61 states have (on average 1.9836065573770492) internal successors, (121), 60 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 [2022-03-20 18:29:13,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:29:13,498 INFO L225 Difference]: With dead ends: 134 [2022-03-20 18:29:13,498 INFO L226 Difference]: Without dead ends: 129 [2022-03-20 18:29:13,499 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 45 SyntacticMatches, 22 SemanticMatches, 117 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1653 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=351, Invalid=13691, Unknown=0, NotChecked=0, Total=14042 [2022-03-20 18:29:13,499 INFO L913 BasicCegarLoop]: 11 mSDtfsCounter, 66 mSDsluCounter, 292 mSDsCounter, 0 mSdLazyCounter, 7077 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 303 SdHoareTripleChecker+Invalid, 7137 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 7077 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-03-20 18:29:13,499 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [66 Valid, 303 Invalid, 7137 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 7077 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-03-20 18:29:13,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2022-03-20 18:29:13,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 128. [2022-03-20 18:29:13,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128 states, 123 states have (on average 1.008130081300813) internal successors, (124), 123 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) [2022-03-20 18:29:13,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 128 transitions. [2022-03-20 18:29:13,533 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 128 transitions. Word has length 125 [2022-03-20 18:29:13,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:29:13,533 INFO L478 AbstractCegarLoop]: Abstraction has 128 states and 128 transitions. [2022-03-20 18:29:13,533 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 61 states, 61 states have (on average 1.9836065573770492) internal successors, (121), 60 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) [2022-03-20 18:29:13,533 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 128 transitions. [2022-03-20 18:29:13,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2022-03-20 18:29:13,533 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:29:13,533 INFO L499 BasicCegarLoop]: trace histogram [58, 58, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:29:13,533 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2022-03-20 18:29:13,534 INFO L403 AbstractCegarLoop]: === Iteration 59 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:29:13,534 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:29:13,534 INFO L85 PathProgramCache]: Analyzing trace with hash 1171158556, now seen corresponding path program 58 times [2022-03-20 18:29:13,534 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:29:13,534 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1360109175] [2022-03-20 18:29:13,554 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 18:29:13,555 INFO L85 PathProgramCache]: Analyzing trace with hash 1876476626, now seen corresponding path program 1 times [2022-03-20 18:29:13,555 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:29:13,555 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [181260064] [2022-03-20 18:29:13,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:29:13,555 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:29:13,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:29:13,566 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:29:13,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:29:13,568 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:29:13,568 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:29:13,568 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [181260064] [2022-03-20 18:29:13,569 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [181260064] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:29:13,569 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:29:13,569 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 18:29:15,189 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:29:15,190 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1360109175] [2022-03-20 18:29:15,190 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1360109175] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:29:15,190 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:29:15,190 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [62] imperfect sequences [] total 62 [2022-03-20 18:29:15,190 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [590223500] [2022-03-20 18:29:15,190 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:29:15,190 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 62 states [2022-03-20 18:29:15,190 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:29:15,191 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2022-03-20 18:29:15,191 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=3661, Unknown=0, NotChecked=0, Total=3782 [2022-03-20 18:29:15,191 INFO L87 Difference]: Start difference. First operand 128 states and 128 transitions. Second operand has 62 states, 62 states have (on average 1.9838709677419355) internal successors, (123), 61 states have internal predecessors, (123), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:29:18,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:29:18,269 INFO L93 Difference]: Finished difference Result 136 states and 136 transitions. [2022-03-20 18:29:18,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2022-03-20 18:29:18,269 INFO L78 Accepts]: Start accepts. Automaton has has 62 states, 62 states have (on average 1.9838709677419355) internal successors, (123), 61 states have internal predecessors, (123), 2 states have call successors, (3), 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 127 [2022-03-20 18:29:18,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:29:18,270 INFO L225 Difference]: With dead ends: 136 [2022-03-20 18:29:18,270 INFO L226 Difference]: Without dead ends: 131 [2022-03-20 18:29:18,271 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 38 SyntacticMatches, 30 SemanticMatches, 119 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1711 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=357, Invalid=14163, Unknown=0, NotChecked=0, Total=14520 [2022-03-20 18:29:18,271 INFO L913 BasicCegarLoop]: 11 mSDtfsCounter, 67 mSDsluCounter, 297 mSDsCounter, 0 mSdLazyCounter, 7317 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 308 SdHoareTripleChecker+Invalid, 7378 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 7317 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-03-20 18:29:18,271 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [67 Valid, 308 Invalid, 7378 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 7317 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2022-03-20 18:29:18,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2022-03-20 18:29:18,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 130. [2022-03-20 18:29:18,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130 states, 125 states have (on average 1.008) internal successors, (126), 125 states have internal predecessors, (126), 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) [2022-03-20 18:29:18,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 130 transitions. [2022-03-20 18:29:18,297 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 130 transitions. Word has length 127 [2022-03-20 18:29:18,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:29:18,297 INFO L478 AbstractCegarLoop]: Abstraction has 130 states and 130 transitions. [2022-03-20 18:29:18,297 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 62 states, 62 states have (on average 1.9838709677419355) internal successors, (123), 61 states have internal predecessors, (123), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:29:18,297 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 130 transitions. [2022-03-20 18:29:18,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2022-03-20 18:29:18,298 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:29:18,298 INFO L499 BasicCegarLoop]: trace histogram [59, 59, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:29:18,298 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2022-03-20 18:29:18,298 INFO L403 AbstractCegarLoop]: === Iteration 60 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:29:18,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:29:18,298 INFO L85 PathProgramCache]: Analyzing trace with hash 1303936122, now seen corresponding path program 59 times [2022-03-20 18:29:18,298 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:29:18,298 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [572452114] [2022-03-20 18:29:18,318 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 18:29:18,319 INFO L85 PathProgramCache]: Analyzing trace with hash 1935581970, now seen corresponding path program 1 times [2022-03-20 18:29:18,319 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:29:18,319 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1519727323] [2022-03-20 18:29:18,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:29:18,319 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:29:18,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:29:18,332 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:29:18,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:29:18,334 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:29:18,334 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:29:18,334 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1519727323] [2022-03-20 18:29:18,334 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1519727323] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:29:18,334 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:29:18,334 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 18:29:19,885 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:29:19,885 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [572452114] [2022-03-20 18:29:19,885 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [572452114] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:29:19,885 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:29:19,885 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [63] imperfect sequences [] total 63 [2022-03-20 18:29:19,885 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1052326110] [2022-03-20 18:29:19,885 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:29:19,886 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2022-03-20 18:29:19,886 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:29:19,886 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2022-03-20 18:29:19,886 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=3783, Unknown=0, NotChecked=0, Total=3906 [2022-03-20 18:29:19,886 INFO L87 Difference]: Start difference. First operand 130 states and 130 transitions. Second operand has 63 states, 63 states have (on average 1.9841269841269842) internal successors, (125), 62 states have internal predecessors, (125), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:29:23,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:29:23,002 INFO L93 Difference]: Finished difference Result 138 states and 138 transitions. [2022-03-20 18:29:23,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2022-03-20 18:29:23,003 INFO L78 Accepts]: Start accepts. Automaton has has 63 states, 63 states have (on average 1.9841269841269842) internal successors, (125), 62 states have internal predecessors, (125), 2 states have call successors, (3), 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 129 [2022-03-20 18:29:23,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:29:23,003 INFO L225 Difference]: With dead ends: 138 [2022-03-20 18:29:23,003 INFO L226 Difference]: Without dead ends: 133 [2022-03-20 18:29:23,004 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 190 GetRequests, 41 SyntacticMatches, 28 SemanticMatches, 121 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1770 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=363, Invalid=14643, Unknown=0, NotChecked=0, Total=15006 [2022-03-20 18:29:23,004 INFO L913 BasicCegarLoop]: 11 mSDtfsCounter, 68 mSDsluCounter, 302 mSDsCounter, 0 mSdLazyCounter, 7561 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 313 SdHoareTripleChecker+Invalid, 7623 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 7561 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-03-20 18:29:23,004 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [68 Valid, 313 Invalid, 7623 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 7561 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2022-03-20 18:29:23,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2022-03-20 18:29:23,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 132. [2022-03-20 18:29:23,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132 states, 127 states have (on average 1.0078740157480315) internal successors, (128), 127 states have internal predecessors, (128), 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) [2022-03-20 18:29:23,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 132 transitions. [2022-03-20 18:29:23,028 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 132 transitions. Word has length 129 [2022-03-20 18:29:23,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:29:23,028 INFO L478 AbstractCegarLoop]: Abstraction has 132 states and 132 transitions. [2022-03-20 18:29:23,028 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 63 states, 63 states have (on average 1.9841269841269842) internal successors, (125), 62 states have internal predecessors, (125), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:29:23,028 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 132 transitions. [2022-03-20 18:29:23,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2022-03-20 18:29:23,029 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:29:23,029 INFO L499 BasicCegarLoop]: trace histogram [60, 60, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:29:23,029 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2022-03-20 18:29:23,029 INFO L403 AbstractCegarLoop]: === Iteration 61 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:29:23,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:29:23,029 INFO L85 PathProgramCache]: Analyzing trace with hash 54158168, now seen corresponding path program 60 times [2022-03-20 18:29:23,029 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:29:23,029 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1313698465] [2022-03-20 18:29:23,059 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 18:29:23,060 INFO L85 PathProgramCache]: Analyzing trace with hash 1994687314, now seen corresponding path program 1 times [2022-03-20 18:29:23,060 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:29:23,060 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [530397781] [2022-03-20 18:29:23,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:29:23,060 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:29:23,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:29:23,073 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:29:23,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:29:23,075 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:29:23,075 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:29:23,075 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [530397781] [2022-03-20 18:29:23,075 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [530397781] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:29:23,075 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:29:23,075 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 18:29:24,601 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:29:24,601 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1313698465] [2022-03-20 18:29:24,601 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1313698465] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:29:24,601 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:29:24,601 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [64] imperfect sequences [] total 64 [2022-03-20 18:29:24,601 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [660211204] [2022-03-20 18:29:24,601 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:29:24,602 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 64 states [2022-03-20 18:29:24,602 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:29:24,602 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2022-03-20 18:29:24,602 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=3907, Unknown=0, NotChecked=0, Total=4032 [2022-03-20 18:29:24,602 INFO L87 Difference]: Start difference. First operand 132 states and 132 transitions. Second operand has 64 states, 64 states have (on average 1.984375) internal successors, (127), 63 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) [2022-03-20 18:29:27,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:29:27,830 INFO L93 Difference]: Finished difference Result 140 states and 140 transitions. [2022-03-20 18:29:27,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2022-03-20 18:29:27,830 INFO L78 Accepts]: Start accepts. Automaton has has 64 states, 64 states have (on average 1.984375) internal successors, (127), 63 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 [2022-03-20 18:29:27,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:29:27,831 INFO L225 Difference]: With dead ends: 140 [2022-03-20 18:29:27,831 INFO L226 Difference]: Without dead ends: 135 [2022-03-20 18:29:27,832 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 44 SyntacticMatches, 26 SemanticMatches, 123 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1830 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=369, Invalid=15131, Unknown=0, NotChecked=0, Total=15500 [2022-03-20 18:29:27,832 INFO L913 BasicCegarLoop]: 11 mSDtfsCounter, 69 mSDsluCounter, 307 mSDsCounter, 0 mSdLazyCounter, 7809 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 318 SdHoareTripleChecker+Invalid, 7872 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 7809 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-03-20 18:29:27,832 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [69 Valid, 318 Invalid, 7872 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 7809 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2022-03-20 18:29:27,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2022-03-20 18:29:27,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 134. [2022-03-20 18:29:27,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 129 states have (on average 1.0077519379844961) internal successors, (130), 129 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) [2022-03-20 18:29:27,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 134 transitions. [2022-03-20 18:29:27,857 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 134 transitions. Word has length 131 [2022-03-20 18:29:27,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:29:27,857 INFO L478 AbstractCegarLoop]: Abstraction has 134 states and 134 transitions. [2022-03-20 18:29:27,857 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 64 states, 64 states have (on average 1.984375) internal successors, (127), 63 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) [2022-03-20 18:29:27,858 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 134 transitions. [2022-03-20 18:29:27,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2022-03-20 18:29:27,858 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:29:27,858 INFO L499 BasicCegarLoop]: trace histogram [61, 61, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:29:27,858 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2022-03-20 18:29:27,858 INFO L403 AbstractCegarLoop]: === Iteration 62 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:29:27,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:29:27,858 INFO L85 PathProgramCache]: Analyzing trace with hash 1608387254, now seen corresponding path program 61 times [2022-03-20 18:29:27,858 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:29:27,858 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1640614457] [2022-03-20 18:29:27,881 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 18:29:27,882 INFO L85 PathProgramCache]: Analyzing trace with hash 2053792658, now seen corresponding path program 1 times [2022-03-20 18:29:27,882 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:29:27,882 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1705396164] [2022-03-20 18:29:27,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:29:27,882 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:29:27,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:29:27,907 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:29:27,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:29:27,912 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:29:27,912 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:29:27,912 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1705396164] [2022-03-20 18:29:27,912 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1705396164] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:29:27,912 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:29:27,912 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 18:29:29,591 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:29:29,591 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1640614457] [2022-03-20 18:29:29,591 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1640614457] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:29:29,591 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:29:29,591 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [65] imperfect sequences [] total 65 [2022-03-20 18:29:29,591 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [778337723] [2022-03-20 18:29:29,592 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:29:29,592 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 65 states [2022-03-20 18:29:29,592 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:29:29,592 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2022-03-20 18:29:29,593 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=4033, Unknown=0, NotChecked=0, Total=4160 [2022-03-20 18:29:29,593 INFO L87 Difference]: Start difference. First operand 134 states and 134 transitions. Second operand has 65 states, 65 states have (on average 1.9846153846153847) internal successors, (129), 64 states have internal predecessors, (129), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:29:32,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:29:32,911 INFO L93 Difference]: Finished difference Result 142 states and 142 transitions. [2022-03-20 18:29:32,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2022-03-20 18:29:32,912 INFO L78 Accepts]: Start accepts. Automaton has has 65 states, 65 states have (on average 1.9846153846153847) internal successors, (129), 64 states have internal predecessors, (129), 2 states have call successors, (3), 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 133 [2022-03-20 18:29:32,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:29:32,912 INFO L225 Difference]: With dead ends: 142 [2022-03-20 18:29:32,912 INFO L226 Difference]: Without dead ends: 137 [2022-03-20 18:29:32,913 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 44 SyntacticMatches, 27 SemanticMatches, 125 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1891 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=375, Invalid=15627, Unknown=0, NotChecked=0, Total=16002 [2022-03-20 18:29:32,913 INFO L913 BasicCegarLoop]: 11 mSDtfsCounter, 70 mSDsluCounter, 312 mSDsCounter, 0 mSdLazyCounter, 8061 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 323 SdHoareTripleChecker+Invalid, 8125 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 8061 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-03-20 18:29:32,914 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [70 Valid, 323 Invalid, 8125 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 8061 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2022-03-20 18:29:32,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2022-03-20 18:29:32,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 136. [2022-03-20 18:29:32,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 131 states have (on average 1.0076335877862594) internal successors, (132), 131 states have internal predecessors, (132), 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) [2022-03-20 18:29:32,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 136 transitions. [2022-03-20 18:29:32,938 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 136 transitions. Word has length 133 [2022-03-20 18:29:32,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:29:32,939 INFO L478 AbstractCegarLoop]: Abstraction has 136 states and 136 transitions. [2022-03-20 18:29:32,939 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 65 states, 65 states have (on average 1.9846153846153847) internal successors, (129), 64 states have internal predecessors, (129), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:29:32,939 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 136 transitions. [2022-03-20 18:29:32,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2022-03-20 18:29:32,939 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:29:32,939 INFO L499 BasicCegarLoop]: trace histogram [62, 62, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:29:32,939 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2022-03-20 18:29:32,939 INFO L403 AbstractCegarLoop]: === Iteration 63 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:29:32,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:29:32,940 INFO L85 PathProgramCache]: Analyzing trace with hash 573919892, now seen corresponding path program 62 times [2022-03-20 18:29:32,940 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:29:32,940 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [7267506] [2022-03-20 18:29:32,961 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 18:29:32,961 INFO L85 PathProgramCache]: Analyzing trace with hash 2112898002, now seen corresponding path program 1 times [2022-03-20 18:29:32,961 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:29:32,962 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1505891575] [2022-03-20 18:29:32,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:29:32,962 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:29:32,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:29:32,975 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:29:32,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:29:32,978 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:29:32,978 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:29:32,978 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1505891575] [2022-03-20 18:29:32,978 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1505891575] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:29:32,978 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:29:32,978 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 18:29:34,657 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:29:34,658 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [7267506] [2022-03-20 18:29:34,658 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [7267506] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:29:34,658 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:29:34,658 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [66] imperfect sequences [] total 66 [2022-03-20 18:29:34,658 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [293690201] [2022-03-20 18:29:34,658 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:29:34,658 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2022-03-20 18:29:34,658 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:29:34,658 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2022-03-20 18:29:34,659 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=4161, Unknown=0, NotChecked=0, Total=4290 [2022-03-20 18:29:34,659 INFO L87 Difference]: Start difference. First operand 136 states and 136 transitions. Second operand has 66 states, 66 states have (on average 1.9848484848484849) internal successors, (131), 65 states have internal predecessors, (131), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:29:38,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:29:38,102 INFO L93 Difference]: Finished difference Result 144 states and 144 transitions. [2022-03-20 18:29:38,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2022-03-20 18:29:38,102 INFO L78 Accepts]: Start accepts. Automaton has has 66 states, 66 states have (on average 1.9848484848484849) internal successors, (131), 65 states have internal predecessors, (131), 2 states have call successors, (3), 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 135 [2022-03-20 18:29:38,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:29:38,103 INFO L225 Difference]: With dead ends: 144 [2022-03-20 18:29:38,103 INFO L226 Difference]: Without dead ends: 139 [2022-03-20 18:29:38,104 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 199 GetRequests, 42 SyntacticMatches, 30 SemanticMatches, 127 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1953 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=381, Invalid=16131, Unknown=0, NotChecked=0, Total=16512 [2022-03-20 18:29:38,104 INFO L913 BasicCegarLoop]: 11 mSDtfsCounter, 71 mSDsluCounter, 317 mSDsCounter, 0 mSdLazyCounter, 8317 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 328 SdHoareTripleChecker+Invalid, 8382 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 8317 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-03-20 18:29:38,104 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [71 Valid, 328 Invalid, 8382 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 8317 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2022-03-20 18:29:38,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2022-03-20 18:29:38,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 138. [2022-03-20 18:29:38,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138 states, 133 states have (on average 1.0075187969924813) internal successors, (134), 133 states have internal predecessors, (134), 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) [2022-03-20 18:29:38,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 138 transitions. [2022-03-20 18:29:38,132 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 138 transitions. Word has length 135 [2022-03-20 18:29:38,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:29:38,132 INFO L478 AbstractCegarLoop]: Abstraction has 138 states and 138 transitions. [2022-03-20 18:29:38,132 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 66 states have (on average 1.9848484848484849) internal successors, (131), 65 states have internal predecessors, (131), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:29:38,132 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 138 transitions. [2022-03-20 18:29:38,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2022-03-20 18:29:38,133 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:29:38,133 INFO L499 BasicCegarLoop]: trace histogram [63, 63, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:29:38,133 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2022-03-20 18:29:38,133 INFO L403 AbstractCegarLoop]: === Iteration 64 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:29:38,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:29:38,133 INFO L85 PathProgramCache]: Analyzing trace with hash -1411769614, now seen corresponding path program 63 times [2022-03-20 18:29:38,133 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:29:38,133 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1022149953] [2022-03-20 18:29:38,154 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 18:29:38,155 INFO L85 PathProgramCache]: Analyzing trace with hash -2122963950, now seen corresponding path program 1 times [2022-03-20 18:29:38,155 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:29:38,155 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1931605886] [2022-03-20 18:29:38,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:29:38,155 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:29:38,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:29:38,170 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:29:38,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:29:38,175 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:29:38,175 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:29:38,176 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1931605886] [2022-03-20 18:29:38,176 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1931605886] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:29:38,176 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:29:38,176 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 18:29:39,975 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:29:39,975 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1022149953] [2022-03-20 18:29:39,975 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1022149953] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:29:39,975 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:29:39,975 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [67] imperfect sequences [] total 67 [2022-03-20 18:29:39,975 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1785578246] [2022-03-20 18:29:39,975 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:29:39,976 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 67 states [2022-03-20 18:29:39,976 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:29:39,976 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2022-03-20 18:29:39,976 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=4291, Unknown=0, NotChecked=0, Total=4422 [2022-03-20 18:29:39,976 INFO L87 Difference]: Start difference. First operand 138 states and 138 transitions. Second operand has 67 states, 67 states have (on average 1.9850746268656716) internal successors, (133), 66 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) [2022-03-20 18:29:43,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:29:43,549 INFO L93 Difference]: Finished difference Result 146 states and 146 transitions. [2022-03-20 18:29:43,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2022-03-20 18:29:43,549 INFO L78 Accepts]: Start accepts. Automaton has has 67 states, 67 states have (on average 1.9850746268656716) internal successors, (133), 66 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 [2022-03-20 18:29:43,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:29:43,550 INFO L225 Difference]: With dead ends: 146 [2022-03-20 18:29:43,550 INFO L226 Difference]: Without dead ends: 141 [2022-03-20 18:29:43,551 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 202 GetRequests, 39 SyntacticMatches, 34 SemanticMatches, 129 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2016 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=387, Invalid=16643, Unknown=0, NotChecked=0, Total=17030 [2022-03-20 18:29:43,551 INFO L913 BasicCegarLoop]: 11 mSDtfsCounter, 72 mSDsluCounter, 322 mSDsCounter, 0 mSdLazyCounter, 8577 mSolverCounterSat, 66 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 333 SdHoareTripleChecker+Invalid, 8643 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 8577 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2022-03-20 18:29:43,551 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [72 Valid, 333 Invalid, 8643 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [66 Valid, 8577 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2022-03-20 18:29:43,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2022-03-20 18:29:43,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 140. [2022-03-20 18:29:43,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140 states, 135 states have (on average 1.0074074074074073) internal successors, (136), 135 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) [2022-03-20 18:29:43,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 140 transitions. [2022-03-20 18:29:43,580 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 140 transitions. Word has length 137 [2022-03-20 18:29:43,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:29:43,580 INFO L478 AbstractCegarLoop]: Abstraction has 140 states and 140 transitions. [2022-03-20 18:29:43,580 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 67 states, 67 states have (on average 1.9850746268656716) internal successors, (133), 66 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) [2022-03-20 18:29:43,580 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 140 transitions. [2022-03-20 18:29:43,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2022-03-20 18:29:43,581 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:29:43,581 INFO L499 BasicCegarLoop]: trace histogram [64, 64, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:29:43,581 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2022-03-20 18:29:43,581 INFO L403 AbstractCegarLoop]: === Iteration 65 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:29:43,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:29:43,581 INFO L85 PathProgramCache]: Analyzing trace with hash 1601061840, now seen corresponding path program 64 times [2022-03-20 18:29:43,581 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:29:43,581 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [308560215] [2022-03-20 18:29:43,603 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 18:29:43,604 INFO L85 PathProgramCache]: Analyzing trace with hash -2063858606, now seen corresponding path program 1 times [2022-03-20 18:29:43,604 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:29:43,604 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [751557607] [2022-03-20 18:29:43,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:29:43,604 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:29:43,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:29:43,624 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:29:43,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:29:43,626 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:29:43,626 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:29:43,627 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [751557607] [2022-03-20 18:29:43,627 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [751557607] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:29:43,627 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:29:43,627 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 18:29:45,586 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:29:45,587 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [308560215] [2022-03-20 18:29:45,587 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [308560215] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:29:45,587 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:29:45,587 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [68] imperfect sequences [] total 68 [2022-03-20 18:29:45,587 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1510890485] [2022-03-20 18:29:45,587 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:29:45,587 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 68 states [2022-03-20 18:29:45,587 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:29:45,587 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2022-03-20 18:29:45,588 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=4423, Unknown=0, NotChecked=0, Total=4556 [2022-03-20 18:29:45,588 INFO L87 Difference]: Start difference. First operand 140 states and 140 transitions. Second operand has 68 states, 68 states have (on average 1.9852941176470589) internal successors, (135), 67 states have internal predecessors, (135), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:29:49,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:29:49,257 INFO L93 Difference]: Finished difference Result 148 states and 148 transitions. [2022-03-20 18:29:49,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2022-03-20 18:29:49,257 INFO L78 Accepts]: Start accepts. Automaton has has 68 states, 68 states have (on average 1.9852941176470589) internal successors, (135), 67 states have internal predecessors, (135), 2 states have call successors, (3), 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 139 [2022-03-20 18:29:49,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:29:49,258 INFO L225 Difference]: With dead ends: 148 [2022-03-20 18:29:49,258 INFO L226 Difference]: Without dead ends: 143 [2022-03-20 18:29:49,259 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 205 GetRequests, 39 SyntacticMatches, 35 SemanticMatches, 131 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2080 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=393, Invalid=17163, Unknown=0, NotChecked=0, Total=17556 [2022-03-20 18:29:49,259 INFO L913 BasicCegarLoop]: 11 mSDtfsCounter, 73 mSDsluCounter, 327 mSDsCounter, 0 mSdLazyCounter, 8841 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 338 SdHoareTripleChecker+Invalid, 8908 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 8841 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2022-03-20 18:29:49,259 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [73 Valid, 338 Invalid, 8908 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 8841 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2022-03-20 18:29:49,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2022-03-20 18:29:49,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 142. [2022-03-20 18:29:49,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 137 states have (on average 1.0072992700729928) internal successors, (138), 137 states have internal predecessors, (138), 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) [2022-03-20 18:29:49,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 142 transitions. [2022-03-20 18:29:49,287 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 142 transitions. Word has length 139 [2022-03-20 18:29:49,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:29:49,287 INFO L478 AbstractCegarLoop]: Abstraction has 142 states and 142 transitions. [2022-03-20 18:29:49,287 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 68 states, 68 states have (on average 1.9852941176470589) internal successors, (135), 67 states have internal predecessors, (135), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:29:49,287 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 142 transitions. [2022-03-20 18:29:49,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2022-03-20 18:29:49,287 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:29:49,287 INFO L499 BasicCegarLoop]: trace histogram [65, 65, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:29:49,288 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2022-03-20 18:29:49,288 INFO L403 AbstractCegarLoop]: === Iteration 66 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:29:49,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:29:49,288 INFO L85 PathProgramCache]: Analyzing trace with hash 2124131630, now seen corresponding path program 65 times [2022-03-20 18:29:49,288 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:29:49,288 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1418813539] [2022-03-20 18:29:49,308 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 18:29:49,308 INFO L85 PathProgramCache]: Analyzing trace with hash -2004753262, now seen corresponding path program 1 times [2022-03-20 18:29:49,308 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:29:49,308 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1676538033] [2022-03-20 18:29:49,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:29:49,308 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:29:49,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:29:49,323 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:29:49,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:29:49,325 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:29:49,325 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:29:49,325 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1676538033] [2022-03-20 18:29:49,325 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1676538033] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:29:49,325 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:29:49,325 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 18:29:51,069 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:29:51,069 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1418813539] [2022-03-20 18:29:51,069 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1418813539] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:29:51,069 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:29:51,069 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [69] imperfect sequences [] total 69 [2022-03-20 18:29:51,069 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [686394773] [2022-03-20 18:29:51,069 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:29:51,070 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 69 states [2022-03-20 18:29:51,070 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:29:51,070 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2022-03-20 18:29:51,071 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=4557, Unknown=0, NotChecked=0, Total=4692 [2022-03-20 18:29:51,071 INFO L87 Difference]: Start difference. First operand 142 states and 142 transitions. Second operand has 69 states, 69 states have (on average 1.9855072463768115) internal successors, (137), 68 states have internal predecessors, (137), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:29:54,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:29:54,812 INFO L93 Difference]: Finished difference Result 150 states and 150 transitions. [2022-03-20 18:29:54,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2022-03-20 18:29:54,813 INFO L78 Accepts]: Start accepts. Automaton has has 69 states, 69 states have (on average 1.9855072463768115) internal successors, (137), 68 states have internal predecessors, (137), 2 states have call successors, (3), 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 141 [2022-03-20 18:29:54,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:29:54,813 INFO L225 Difference]: With dead ends: 150 [2022-03-20 18:29:54,813 INFO L226 Difference]: Without dead ends: 145 [2022-03-20 18:29:54,814 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 208 GetRequests, 52 SyntacticMatches, 23 SemanticMatches, 133 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2145 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=399, Invalid=17691, Unknown=0, NotChecked=0, Total=18090 [2022-03-20 18:29:54,815 INFO L913 BasicCegarLoop]: 11 mSDtfsCounter, 74 mSDsluCounter, 332 mSDsCounter, 0 mSdLazyCounter, 9109 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 343 SdHoareTripleChecker+Invalid, 9177 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 9109 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-03-20 18:29:54,815 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [74 Valid, 343 Invalid, 9177 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 9109 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2022-03-20 18:29:54,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2022-03-20 18:29:54,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 144. [2022-03-20 18:29:54,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 144 states, 139 states have (on average 1.0071942446043165) internal successors, (140), 139 states have internal predecessors, (140), 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) [2022-03-20 18:29:54,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 144 transitions. [2022-03-20 18:29:54,843 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 144 transitions. Word has length 141 [2022-03-20 18:29:54,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:29:54,843 INFO L478 AbstractCegarLoop]: Abstraction has 144 states and 144 transitions. [2022-03-20 18:29:54,843 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 69 states, 69 states have (on average 1.9855072463768115) internal successors, (137), 68 states have internal predecessors, (137), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:29:54,843 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 144 transitions. [2022-03-20 18:29:54,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2022-03-20 18:29:54,844 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:29:54,844 INFO L499 BasicCegarLoop]: trace histogram [66, 66, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:29:54,844 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2022-03-20 18:29:54,844 INFO L403 AbstractCegarLoop]: === Iteration 67 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:29:54,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:29:54,844 INFO L85 PathProgramCache]: Analyzing trace with hash -2011941108, now seen corresponding path program 66 times [2022-03-20 18:29:54,844 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:29:54,844 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [609808142] [2022-03-20 18:29:54,873 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 18:29:54,873 INFO L85 PathProgramCache]: Analyzing trace with hash -1945647918, now seen corresponding path program 1 times [2022-03-20 18:29:54,873 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:29:54,873 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1361066595] [2022-03-20 18:29:54,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:29:54,873 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:29:54,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:29:54,892 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:29:54,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:29:54,895 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:29:54,895 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:29:54,895 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1361066595] [2022-03-20 18:29:54,895 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1361066595] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:29:54,895 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:29:54,895 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 18:29:57,047 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:29:57,047 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [609808142] [2022-03-20 18:29:57,048 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [609808142] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:29:57,048 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:29:57,048 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [70] imperfect sequences [] total 70 [2022-03-20 18:29:57,048 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [174921936] [2022-03-20 18:29:57,048 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:29:57,048 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 70 states [2022-03-20 18:29:57,048 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:29:57,048 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2022-03-20 18:29:57,049 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=4693, Unknown=0, NotChecked=0, Total=4830 [2022-03-20 18:29:57,049 INFO L87 Difference]: Start difference. First operand 144 states and 144 transitions. Second operand has 70 states, 70 states have (on average 1.9857142857142858) internal successors, (139), 69 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) [2022-03-20 18:30:00,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:30:00,921 INFO L93 Difference]: Finished difference Result 152 states and 152 transitions. [2022-03-20 18:30:00,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2022-03-20 18:30:00,921 INFO L78 Accepts]: Start accepts. Automaton has has 70 states, 70 states have (on average 1.9857142857142858) internal successors, (139), 69 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 [2022-03-20 18:30:00,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:30:00,922 INFO L225 Difference]: With dead ends: 152 [2022-03-20 18:30:00,922 INFO L226 Difference]: Without dead ends: 147 [2022-03-20 18:30:00,923 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 211 GetRequests, 39 SyntacticMatches, 37 SemanticMatches, 135 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2211 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=405, Invalid=18227, Unknown=0, NotChecked=0, Total=18632 [2022-03-20 18:30:00,923 INFO L913 BasicCegarLoop]: 11 mSDtfsCounter, 75 mSDsluCounter, 337 mSDsCounter, 0 mSdLazyCounter, 9381 mSolverCounterSat, 69 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 348 SdHoareTripleChecker+Invalid, 9450 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 9381 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-03-20 18:30:00,923 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [75 Valid, 348 Invalid, 9450 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 9381 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2022-03-20 18:30:00,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2022-03-20 18:30:00,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 146. [2022-03-20 18:30:00,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146 states, 141 states have (on average 1.0070921985815602) internal successors, (142), 141 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) [2022-03-20 18:30:00,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 146 transitions. [2022-03-20 18:30:00,956 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 146 transitions. Word has length 143 [2022-03-20 18:30:00,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:30:00,956 INFO L478 AbstractCegarLoop]: Abstraction has 146 states and 146 transitions. [2022-03-20 18:30:00,956 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 70 states, 70 states have (on average 1.9857142857142858) internal successors, (139), 69 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) [2022-03-20 18:30:00,956 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 146 transitions. [2022-03-20 18:30:00,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2022-03-20 18:30:00,957 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:30:00,957 INFO L499 BasicCegarLoop]: trace histogram [67, 67, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:30:00,957 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2022-03-20 18:30:00,957 INFO L403 AbstractCegarLoop]: === Iteration 68 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:30:00,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:30:00,957 INFO L85 PathProgramCache]: Analyzing trace with hash 361873770, now seen corresponding path program 67 times [2022-03-20 18:30:00,957 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:30:00,957 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [106080058] [2022-03-20 18:30:00,978 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 18:30:00,978 INFO L85 PathProgramCache]: Analyzing trace with hash -1886542574, now seen corresponding path program 1 times [2022-03-20 18:30:00,978 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:30:00,978 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1855293957] [2022-03-20 18:30:00,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:30:00,979 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:30:00,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:30:00,989 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:30:00,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:30:00,991 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:30:00,991 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:30:00,991 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1855293957] [2022-03-20 18:30:00,991 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1855293957] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:30:00,991 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:30:00,991 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 18:30:02,968 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:30:02,968 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [106080058] [2022-03-20 18:30:02,968 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [106080058] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:30:02,968 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:30:02,968 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [71] imperfect sequences [] total 71 [2022-03-20 18:30:02,968 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1968777917] [2022-03-20 18:30:02,968 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:30:02,968 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 71 states [2022-03-20 18:30:02,969 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:30:02,969 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2022-03-20 18:30:02,969 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=4831, Unknown=0, NotChecked=0, Total=4970 [2022-03-20 18:30:02,969 INFO L87 Difference]: Start difference. First operand 146 states and 146 transitions. Second operand has 71 states, 71 states have (on average 1.9859154929577465) internal successors, (141), 70 states have internal predecessors, (141), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:30:06,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:30:06,983 INFO L93 Difference]: Finished difference Result 154 states and 154 transitions. [2022-03-20 18:30:06,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2022-03-20 18:30:06,983 INFO L78 Accepts]: Start accepts. Automaton has has 71 states, 71 states have (on average 1.9859154929577465) internal successors, (141), 70 states have internal predecessors, (141), 2 states have call successors, (3), 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 145 [2022-03-20 18:30:06,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:30:06,984 INFO L225 Difference]: With dead ends: 154 [2022-03-20 18:30:06,984 INFO L226 Difference]: Without dead ends: 149 [2022-03-20 18:30:06,985 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 214 GetRequests, 44 SyntacticMatches, 33 SemanticMatches, 137 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2278 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=411, Invalid=18771, Unknown=0, NotChecked=0, Total=19182 [2022-03-20 18:30:06,985 INFO L913 BasicCegarLoop]: 11 mSDtfsCounter, 76 mSDsluCounter, 342 mSDsCounter, 0 mSdLazyCounter, 9657 mSolverCounterSat, 70 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 353 SdHoareTripleChecker+Invalid, 9727 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 70 IncrementalHoareTripleChecker+Valid, 9657 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-03-20 18:30:06,985 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [76 Valid, 353 Invalid, 9727 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [70 Valid, 9657 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2022-03-20 18:30:06,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2022-03-20 18:30:07,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 148. [2022-03-20 18:30:07,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 143 states have (on average 1.006993006993007) internal successors, (144), 143 states have internal predecessors, (144), 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) [2022-03-20 18:30:07,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 148 transitions. [2022-03-20 18:30:07,015 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 148 transitions. Word has length 145 [2022-03-20 18:30:07,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:30:07,015 INFO L478 AbstractCegarLoop]: Abstraction has 148 states and 148 transitions. [2022-03-20 18:30:07,015 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 71 states, 71 states have (on average 1.9859154929577465) internal successors, (141), 70 states have internal predecessors, (141), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:30:07,015 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 148 transitions. [2022-03-20 18:30:07,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2022-03-20 18:30:07,016 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:30:07,016 INFO L499 BasicCegarLoop]: trace histogram [68, 68, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:30:07,016 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2022-03-20 18:30:07,016 INFO L403 AbstractCegarLoop]: === Iteration 69 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:30:07,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:30:07,016 INFO L85 PathProgramCache]: Analyzing trace with hash 970337352, now seen corresponding path program 68 times [2022-03-20 18:30:07,016 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:30:07,016 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2041935601] [2022-03-20 18:30:07,036 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 18:30:07,036 INFO L85 PathProgramCache]: Analyzing trace with hash -1827437230, now seen corresponding path program 1 times [2022-03-20 18:30:07,036 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:30:07,036 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [802957563] [2022-03-20 18:30:07,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:30:07,036 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:30:07,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:30:07,047 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:30:07,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:30:07,050 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:30:07,050 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:30:07,050 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [802957563] [2022-03-20 18:30:07,050 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [802957563] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:30:07,050 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:30:07,050 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 18:30:09,139 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:30:09,139 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2041935601] [2022-03-20 18:30:09,139 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2041935601] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:30:09,140 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:30:09,140 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [72] imperfect sequences [] total 72 [2022-03-20 18:30:09,140 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1308349013] [2022-03-20 18:30:09,140 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:30:09,140 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 72 states [2022-03-20 18:30:09,140 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:30:09,140 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2022-03-20 18:30:09,141 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=4971, Unknown=0, NotChecked=0, Total=5112 [2022-03-20 18:30:09,141 INFO L87 Difference]: Start difference. First operand 148 states and 148 transitions. Second operand has 72 states, 72 states have (on average 1.9861111111111112) internal successors, (143), 71 states have internal predecessors, (143), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:30:13,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:30:13,255 INFO L93 Difference]: Finished difference Result 156 states and 156 transitions. [2022-03-20 18:30:13,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2022-03-20 18:30:13,256 INFO L78 Accepts]: Start accepts. Automaton has has 72 states, 72 states have (on average 1.9861111111111112) internal successors, (143), 71 states have internal predecessors, (143), 2 states have call successors, (3), 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 147 [2022-03-20 18:30:13,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:30:13,256 INFO L225 Difference]: With dead ends: 156 [2022-03-20 18:30:13,257 INFO L226 Difference]: Without dead ends: 151 [2022-03-20 18:30:13,258 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 217 GetRequests, 43 SyntacticMatches, 35 SemanticMatches, 139 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2346 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=417, Invalid=19323, Unknown=0, NotChecked=0, Total=19740 [2022-03-20 18:30:13,258 INFO L913 BasicCegarLoop]: 11 mSDtfsCounter, 77 mSDsluCounter, 347 mSDsCounter, 0 mSdLazyCounter, 9937 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 358 SdHoareTripleChecker+Invalid, 10008 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 9937 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2022-03-20 18:30:13,258 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [77 Valid, 358 Invalid, 10008 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 9937 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2022-03-20 18:30:13,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2022-03-20 18:30:13,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 150. [2022-03-20 18:30:13,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 145 states have (on average 1.006896551724138) internal successors, (146), 145 states have internal predecessors, (146), 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) [2022-03-20 18:30:13,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 150 transitions. [2022-03-20 18:30:13,290 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 150 transitions. Word has length 147 [2022-03-20 18:30:13,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:30:13,290 INFO L478 AbstractCegarLoop]: Abstraction has 150 states and 150 transitions. [2022-03-20 18:30:13,290 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 72 states, 72 states have (on average 1.9861111111111112) internal successors, (143), 71 states have internal predecessors, (143), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:30:13,290 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 150 transitions. [2022-03-20 18:30:13,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2022-03-20 18:30:13,291 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:30:13,291 INFO L499 BasicCegarLoop]: trace histogram [69, 69, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:30:13,291 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2022-03-20 18:30:13,291 INFO L403 AbstractCegarLoop]: === Iteration 70 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:30:13,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:30:13,291 INFO L85 PathProgramCache]: Analyzing trace with hash 1588287398, now seen corresponding path program 69 times [2022-03-20 18:30:13,291 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:30:13,291 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1765264260] [2022-03-20 18:30:13,314 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 18:30:13,314 INFO L85 PathProgramCache]: Analyzing trace with hash -1768331886, now seen corresponding path program 1 times [2022-03-20 18:30:13,314 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:30:13,314 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [767259214] [2022-03-20 18:30:13,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:30:13,315 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:30:13,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:30:13,326 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:30:13,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:30:13,328 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:30:13,328 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:30:13,328 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [767259214] [2022-03-20 18:30:13,328 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [767259214] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:30:13,329 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:30:13,329 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 18:30:15,434 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:30:15,434 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1765264260] [2022-03-20 18:30:15,434 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1765264260] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:30:15,434 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:30:15,434 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [73] imperfect sequences [] total 73 [2022-03-20 18:30:15,434 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [879200683] [2022-03-20 18:30:15,434 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:30:15,434 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 73 states [2022-03-20 18:30:15,434 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:30:15,435 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2022-03-20 18:30:15,435 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=5113, Unknown=0, NotChecked=0, Total=5256 [2022-03-20 18:30:15,435 INFO L87 Difference]: Start difference. First operand 150 states and 150 transitions. Second operand has 73 states, 73 states have (on average 1.9863013698630136) internal successors, (145), 72 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) [2022-03-20 18:30:19,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:30:19,677 INFO L93 Difference]: Finished difference Result 158 states and 158 transitions. [2022-03-20 18:30:19,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2022-03-20 18:30:19,677 INFO L78 Accepts]: Start accepts. Automaton has has 73 states, 73 states have (on average 1.9863013698630136) internal successors, (145), 72 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 [2022-03-20 18:30:19,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:30:19,678 INFO L225 Difference]: With dead ends: 158 [2022-03-20 18:30:19,678 INFO L226 Difference]: Without dead ends: 153 [2022-03-20 18:30:19,679 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 220 GetRequests, 47 SyntacticMatches, 32 SemanticMatches, 141 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2415 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=423, Invalid=19883, Unknown=0, NotChecked=0, Total=20306 [2022-03-20 18:30:19,679 INFO L913 BasicCegarLoop]: 11 mSDtfsCounter, 78 mSDsluCounter, 352 mSDsCounter, 0 mSdLazyCounter, 10221 mSolverCounterSat, 72 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 363 SdHoareTripleChecker+Invalid, 10293 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 10221 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2022-03-20 18:30:19,679 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [78 Valid, 363 Invalid, 10293 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [72 Valid, 10221 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2022-03-20 18:30:19,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2022-03-20 18:30:19,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 152. [2022-03-20 18:30:19,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152 states, 147 states have (on average 1.0068027210884354) internal successors, (148), 147 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) [2022-03-20 18:30:19,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 152 transitions. [2022-03-20 18:30:19,710 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 152 transitions. Word has length 149 [2022-03-20 18:30:19,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:30:19,710 INFO L478 AbstractCegarLoop]: Abstraction has 152 states and 152 transitions. [2022-03-20 18:30:19,710 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 73 states, 73 states have (on average 1.9863013698630136) internal successors, (145), 72 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) [2022-03-20 18:30:19,710 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 152 transitions. [2022-03-20 18:30:19,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2022-03-20 18:30:19,711 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:30:19,711 INFO L499 BasicCegarLoop]: trace histogram [70, 70, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:30:19,711 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2022-03-20 18:30:19,711 INFO L403 AbstractCegarLoop]: === Iteration 71 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:30:19,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:30:19,711 INFO L85 PathProgramCache]: Analyzing trace with hash -1562172540, now seen corresponding path program 70 times [2022-03-20 18:30:19,711 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:30:19,711 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1666092584] [2022-03-20 18:30:19,733 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 18:30:19,733 INFO L85 PathProgramCache]: Analyzing trace with hash -1709226542, now seen corresponding path program 1 times [2022-03-20 18:30:19,733 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:30:19,733 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1158137418] [2022-03-20 18:30:19,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:30:19,734 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:30:19,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:30:19,751 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:30:19,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:30:19,754 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:30:19,754 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:30:19,754 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1158137418] [2022-03-20 18:30:19,754 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1158137418] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:30:19,754 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:30:19,754 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 18:30:22,006 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:30:22,006 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1666092584] [2022-03-20 18:30:22,006 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1666092584] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:30:22,006 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:30:22,006 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [74] imperfect sequences [] total 74 [2022-03-20 18:30:22,006 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [942603517] [2022-03-20 18:30:22,006 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:30:22,006 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 74 states [2022-03-20 18:30:22,006 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:30:22,007 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2022-03-20 18:30:22,007 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=5257, Unknown=0, NotChecked=0, Total=5402 [2022-03-20 18:30:22,007 INFO L87 Difference]: Start difference. First operand 152 states and 152 transitions. Second operand has 74 states, 74 states have (on average 1.9864864864864864) internal successors, (147), 73 states have internal predecessors, (147), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:30:26,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:30:26,335 INFO L93 Difference]: Finished difference Result 160 states and 160 transitions. [2022-03-20 18:30:26,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2022-03-20 18:30:26,335 INFO L78 Accepts]: Start accepts. Automaton has has 74 states, 74 states have (on average 1.9864864864864864) internal successors, (147), 73 states have internal predecessors, (147), 2 states have call successors, (3), 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 151 [2022-03-20 18:30:26,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:30:26,336 INFO L225 Difference]: With dead ends: 160 [2022-03-20 18:30:26,336 INFO L226 Difference]: Without dead ends: 155 [2022-03-20 18:30:26,337 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 223 GetRequests, 45 SyntacticMatches, 35 SemanticMatches, 143 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2485 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=429, Invalid=20451, Unknown=0, NotChecked=0, Total=20880 [2022-03-20 18:30:26,337 INFO L913 BasicCegarLoop]: 11 mSDtfsCounter, 79 mSDsluCounter, 357 mSDsCounter, 0 mSdLazyCounter, 10509 mSolverCounterSat, 73 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 368 SdHoareTripleChecker+Invalid, 10582 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 73 IncrementalHoareTripleChecker+Valid, 10509 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2022-03-20 18:30:26,337 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [79 Valid, 368 Invalid, 10582 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [73 Valid, 10509 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2022-03-20 18:30:26,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2022-03-20 18:30:26,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 154. [2022-03-20 18:30:26,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 154 states, 149 states have (on average 1.0067114093959733) internal successors, (150), 149 states have internal predecessors, (150), 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) [2022-03-20 18:30:26,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 154 transitions. [2022-03-20 18:30:26,369 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 154 transitions. Word has length 151 [2022-03-20 18:30:26,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:30:26,369 INFO L478 AbstractCegarLoop]: Abstraction has 154 states and 154 transitions. [2022-03-20 18:30:26,369 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 74 states, 74 states have (on average 1.9864864864864864) internal successors, (147), 73 states have internal predecessors, (147), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:30:26,370 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 154 transitions. [2022-03-20 18:30:26,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2022-03-20 18:30:26,370 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:30:26,370 INFO L499 BasicCegarLoop]: trace histogram [71, 71, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:30:26,370 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2022-03-20 18:30:26,370 INFO L403 AbstractCegarLoop]: === Iteration 72 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:30:26,370 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:30:26,370 INFO L85 PathProgramCache]: Analyzing trace with hash -1202229278, now seen corresponding path program 71 times [2022-03-20 18:30:26,371 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:30:26,371 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [995455949] [2022-03-20 18:30:26,390 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 18:30:26,390 INFO L85 PathProgramCache]: Analyzing trace with hash -1650121198, now seen corresponding path program 1 times [2022-03-20 18:30:26,390 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:30:26,390 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1741128149] [2022-03-20 18:30:26,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:30:26,391 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:30:26,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:30:26,408 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:30:26,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:30:26,421 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:30:26,421 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:30:26,421 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1741128149] [2022-03-20 18:30:26,421 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1741128149] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:30:26,421 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:30:26,421 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 18:30:28,843 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:30:28,843 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [995455949] [2022-03-20 18:30:28,843 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [995455949] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:30:28,843 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:30:28,843 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [75] imperfect sequences [] total 75 [2022-03-20 18:30:28,843 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [318100941] [2022-03-20 18:30:28,843 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:30:28,844 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 75 states [2022-03-20 18:30:28,844 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:30:28,844 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2022-03-20 18:30:28,844 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=5403, Unknown=0, NotChecked=0, Total=5550 [2022-03-20 18:30:28,844 INFO L87 Difference]: Start difference. First operand 154 states and 154 transitions. Second operand has 75 states, 75 states have (on average 1.9866666666666666) internal successors, (149), 74 states have internal predecessors, (149), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:30:33,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:30:33,324 INFO L93 Difference]: Finished difference Result 162 states and 162 transitions. [2022-03-20 18:30:33,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2022-03-20 18:30:33,325 INFO L78 Accepts]: Start accepts. Automaton has has 75 states, 75 states have (on average 1.9866666666666666) internal successors, (149), 74 states have internal predecessors, (149), 2 states have call successors, (3), 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 153 [2022-03-20 18:30:33,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:30:33,325 INFO L225 Difference]: With dead ends: 162 [2022-03-20 18:30:33,325 INFO L226 Difference]: Without dead ends: 157 [2022-03-20 18:30:33,326 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 226 GetRequests, 43 SyntacticMatches, 38 SemanticMatches, 145 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2556 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=435, Invalid=21027, Unknown=0, NotChecked=0, Total=21462 [2022-03-20 18:30:33,327 INFO L913 BasicCegarLoop]: 11 mSDtfsCounter, 80 mSDsluCounter, 362 mSDsCounter, 0 mSdLazyCounter, 10801 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 373 SdHoareTripleChecker+Invalid, 10875 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 10801 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2022-03-20 18:30:33,327 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [80 Valid, 373 Invalid, 10875 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 10801 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2022-03-20 18:30:33,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2022-03-20 18:30:33,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 156. [2022-03-20 18:30:33,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 156 states, 151 states have (on average 1.0066225165562914) internal successors, (152), 151 states have internal predecessors, (152), 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) [2022-03-20 18:30:33,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 156 transitions. [2022-03-20 18:30:33,359 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 156 transitions. Word has length 153 [2022-03-20 18:30:33,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:30:33,359 INFO L478 AbstractCegarLoop]: Abstraction has 156 states and 156 transitions. [2022-03-20 18:30:33,360 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 75 states, 75 states have (on average 1.9866666666666666) internal successors, (149), 74 states have internal predecessors, (149), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:30:33,360 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 156 transitions. [2022-03-20 18:30:33,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2022-03-20 18:30:33,360 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:30:33,360 INFO L499 BasicCegarLoop]: trace histogram [72, 72, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:30:33,360 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2022-03-20 18:30:33,360 INFO L403 AbstractCegarLoop]: === Iteration 73 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:30:33,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:30:33,360 INFO L85 PathProgramCache]: Analyzing trace with hash 1105861824, now seen corresponding path program 72 times [2022-03-20 18:30:33,361 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:30:33,361 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1076804060] [2022-03-20 18:30:33,385 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 18:30:33,385 INFO L85 PathProgramCache]: Analyzing trace with hash -1591015854, now seen corresponding path program 1 times [2022-03-20 18:30:33,385 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:30:33,385 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [471375471] [2022-03-20 18:30:33,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:30:33,386 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:30:33,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:30:33,403 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:30:33,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:30:33,405 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:30:33,405 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:30:33,405 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [471375471] [2022-03-20 18:30:33,406 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [471375471] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:30:33,406 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:30:33,406 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 18:30:35,727 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:30:35,728 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1076804060] [2022-03-20 18:30:35,728 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1076804060] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:30:35,728 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:30:35,728 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [76] imperfect sequences [] total 76 [2022-03-20 18:30:35,728 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [475290066] [2022-03-20 18:30:35,728 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:30:35,728 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 76 states [2022-03-20 18:30:35,728 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:30:35,728 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2022-03-20 18:30:35,729 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=5551, Unknown=0, NotChecked=0, Total=5700 [2022-03-20 18:30:35,729 INFO L87 Difference]: Start difference. First operand 156 states and 156 transitions. Second operand has 76 states, 76 states have (on average 1.986842105263158) internal successors, (151), 75 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) [2022-03-20 18:30:40,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:30:40,311 INFO L93 Difference]: Finished difference Result 164 states and 164 transitions. [2022-03-20 18:30:40,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2022-03-20 18:30:40,312 INFO L78 Accepts]: Start accepts. Automaton has has 76 states, 76 states have (on average 1.986842105263158) internal successors, (151), 75 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 [2022-03-20 18:30:40,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:30:40,312 INFO L225 Difference]: With dead ends: 164 [2022-03-20 18:30:40,313 INFO L226 Difference]: Without dead ends: 159 [2022-03-20 18:30:40,313 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 229 GetRequests, 47 SyntacticMatches, 35 SemanticMatches, 147 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2628 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=441, Invalid=21611, Unknown=0, NotChecked=0, Total=22052 [2022-03-20 18:30:40,314 INFO L913 BasicCegarLoop]: 11 mSDtfsCounter, 81 mSDsluCounter, 367 mSDsCounter, 0 mSdLazyCounter, 11097 mSolverCounterSat, 75 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 378 SdHoareTripleChecker+Invalid, 11172 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 75 IncrementalHoareTripleChecker+Valid, 11097 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2022-03-20 18:30:40,314 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [81 Valid, 378 Invalid, 11172 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [75 Valid, 11097 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2022-03-20 18:30:40,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2022-03-20 18:30:40,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 158. [2022-03-20 18:30:40,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158 states, 153 states have (on average 1.0065359477124183) internal successors, (154), 153 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) [2022-03-20 18:30:40,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 158 transitions. [2022-03-20 18:30:40,347 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 158 transitions. Word has length 155 [2022-03-20 18:30:40,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:30:40,347 INFO L478 AbstractCegarLoop]: Abstraction has 158 states and 158 transitions. [2022-03-20 18:30:40,347 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 76 states, 76 states have (on average 1.986842105263158) internal successors, (151), 75 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) [2022-03-20 18:30:40,347 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 158 transitions. [2022-03-20 18:30:40,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2022-03-20 18:30:40,348 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:30:40,348 INFO L499 BasicCegarLoop]: trace histogram [73, 73, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:30:40,348 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2022-03-20 18:30:40,348 INFO L403 AbstractCegarLoop]: === Iteration 74 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:30:40,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:30:40,348 INFO L85 PathProgramCache]: Analyzing trace with hash -1316681186, now seen corresponding path program 73 times [2022-03-20 18:30:40,348 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:30:40,348 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1187709523] [2022-03-20 18:30:40,370 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 18:30:40,370 INFO L85 PathProgramCache]: Analyzing trace with hash -1531910510, now seen corresponding path program 1 times [2022-03-20 18:30:40,370 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:30:40,370 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1007037569] [2022-03-20 18:30:40,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:30:40,371 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:30:40,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:30:40,391 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:30:40,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:30:40,393 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:30:40,393 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:30:40,393 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1007037569] [2022-03-20 18:30:40,393 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1007037569] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:30:40,393 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:30:40,394 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 18:30:42,636 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:30:42,636 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1187709523] [2022-03-20 18:30:42,636 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1187709523] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:30:42,636 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:30:42,637 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [77] imperfect sequences [] total 77 [2022-03-20 18:30:42,637 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [644071027] [2022-03-20 18:30:42,637 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:30:42,637 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 77 states [2022-03-20 18:30:42,637 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:30:42,637 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2022-03-20 18:30:42,638 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=5701, Unknown=0, NotChecked=0, Total=5852 [2022-03-20 18:30:42,638 INFO L87 Difference]: Start difference. First operand 158 states and 158 transitions. Second operand has 77 states, 77 states have (on average 1.9870129870129871) internal successors, (153), 76 states have internal predecessors, (153), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:30:47,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:30:47,326 INFO L93 Difference]: Finished difference Result 166 states and 166 transitions. [2022-03-20 18:30:47,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2022-03-20 18:30:47,326 INFO L78 Accepts]: Start accepts. Automaton has has 77 states, 77 states have (on average 1.9870129870129871) internal successors, (153), 76 states have internal predecessors, (153), 2 states have call successors, (3), 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 157 [2022-03-20 18:30:47,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:30:47,326 INFO L225 Difference]: With dead ends: 166 [2022-03-20 18:30:47,327 INFO L226 Difference]: Without dead ends: 161 [2022-03-20 18:30:47,328 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 232 GetRequests, 51 SyntacticMatches, 32 SemanticMatches, 149 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2701 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=447, Invalid=22203, Unknown=0, NotChecked=0, Total=22650 [2022-03-20 18:30:47,328 INFO L913 BasicCegarLoop]: 11 mSDtfsCounter, 82 mSDsluCounter, 372 mSDsCounter, 0 mSdLazyCounter, 11397 mSolverCounterSat, 76 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 383 SdHoareTripleChecker+Invalid, 11473 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 11397 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2022-03-20 18:30:47,328 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [82 Valid, 383 Invalid, 11473 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [76 Valid, 11397 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2022-03-20 18:30:47,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2022-03-20 18:30:47,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 160. [2022-03-20 18:30:47,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 155 states have (on average 1.0064516129032257) internal successors, (156), 155 states have internal predecessors, (156), 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) [2022-03-20 18:30:47,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 160 transitions. [2022-03-20 18:30:47,363 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 160 transitions. Word has length 157 [2022-03-20 18:30:47,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:30:47,363 INFO L478 AbstractCegarLoop]: Abstraction has 160 states and 160 transitions. [2022-03-20 18:30:47,363 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 77 states, 77 states have (on average 1.9870129870129871) internal successors, (153), 76 states have internal predecessors, (153), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:30:47,363 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 160 transitions. [2022-03-20 18:30:47,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2022-03-20 18:30:47,364 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:30:47,364 INFO L499 BasicCegarLoop]: trace histogram [74, 74, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:30:47,364 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2022-03-20 18:30:47,364 INFO L403 AbstractCegarLoop]: === Iteration 75 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:30:47,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:30:47,364 INFO L85 PathProgramCache]: Analyzing trace with hash -1508239364, now seen corresponding path program 74 times [2022-03-20 18:30:47,364 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:30:47,364 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1645298973] [2022-03-20 18:30:47,385 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 18:30:47,385 INFO L85 PathProgramCache]: Analyzing trace with hash -1472805166, now seen corresponding path program 1 times [2022-03-20 18:30:47,385 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:30:47,385 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [489775702] [2022-03-20 18:30:47,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:30:47,385 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:30:47,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:30:47,395 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:30:47,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:30:47,397 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:30:47,397 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:30:47,397 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [489775702] [2022-03-20 18:30:47,397 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [489775702] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:30:47,397 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:30:47,398 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 18:30:49,918 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:30:49,918 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1645298973] [2022-03-20 18:30:49,918 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1645298973] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:30:49,918 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:30:49,918 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [78] imperfect sequences [] total 78 [2022-03-20 18:30:49,918 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [828398020] [2022-03-20 18:30:49,918 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:30:49,919 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 78 states [2022-03-20 18:30:49,919 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:30:49,919 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2022-03-20 18:30:49,919 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=5853, Unknown=0, NotChecked=0, Total=6006 [2022-03-20 18:30:49,919 INFO L87 Difference]: Start difference. First operand 160 states and 160 transitions. Second operand has 78 states, 78 states have (on average 1.9871794871794872) internal successors, (155), 77 states have internal predecessors, (155), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:30:54,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:30:54,805 INFO L93 Difference]: Finished difference Result 168 states and 168 transitions. [2022-03-20 18:30:54,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2022-03-20 18:30:54,805 INFO L78 Accepts]: Start accepts. Automaton has has 78 states, 78 states have (on average 1.9871794871794872) internal successors, (155), 77 states have internal predecessors, (155), 2 states have call successors, (3), 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 159 [2022-03-20 18:30:54,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:30:54,806 INFO L225 Difference]: With dead ends: 168 [2022-03-20 18:30:54,806 INFO L226 Difference]: Without dead ends: 163 [2022-03-20 18:30:54,806 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 235 GetRequests, 46 SyntacticMatches, 38 SemanticMatches, 151 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2775 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=453, Invalid=22803, Unknown=0, NotChecked=0, Total=23256 [2022-03-20 18:30:54,807 INFO L913 BasicCegarLoop]: 11 mSDtfsCounter, 83 mSDsluCounter, 377 mSDsCounter, 0 mSdLazyCounter, 11701 mSolverCounterSat, 77 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 388 SdHoareTripleChecker+Invalid, 11778 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 77 IncrementalHoareTripleChecker+Valid, 11701 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2022-03-20 18:30:54,807 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [83 Valid, 388 Invalid, 11778 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [77 Valid, 11701 Invalid, 0 Unknown, 0 Unchecked, 2.9s Time] [2022-03-20 18:30:54,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2022-03-20 18:30:54,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 162. [2022-03-20 18:30:54,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 162 states, 157 states have (on average 1.0063694267515924) internal successors, (158), 157 states have internal predecessors, (158), 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) [2022-03-20 18:30:54,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 162 transitions. [2022-03-20 18:30:54,842 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 162 transitions. Word has length 159 [2022-03-20 18:30:54,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:30:54,842 INFO L478 AbstractCegarLoop]: Abstraction has 162 states and 162 transitions. [2022-03-20 18:30:54,842 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 78 states, 78 states have (on average 1.9871794871794872) internal successors, (155), 77 states have internal predecessors, (155), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:30:54,842 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 162 transitions. [2022-03-20 18:30:54,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2022-03-20 18:30:54,843 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:30:54,843 INFO L499 BasicCegarLoop]: trace histogram [75, 75, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:30:54,843 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2022-03-20 18:30:54,843 INFO L403 AbstractCegarLoop]: === Iteration 76 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:30:54,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:30:54,843 INFO L85 PathProgramCache]: Analyzing trace with hash -912054694, now seen corresponding path program 75 times [2022-03-20 18:30:54,843 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:30:54,843 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [49452891] [2022-03-20 18:30:54,867 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 18:30:54,867 INFO L85 PathProgramCache]: Analyzing trace with hash -1413699822, now seen corresponding path program 1 times [2022-03-20 18:30:54,867 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:30:54,867 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1135314364] [2022-03-20 18:30:54,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:30:54,867 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:30:54,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:30:54,879 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:30:54,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:30:54,882 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:30:54,882 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:30:54,882 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1135314364] [2022-03-20 18:30:54,883 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1135314364] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:30:54,883 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:30:54,883 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 18:30:57,416 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:30:57,416 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [49452891] [2022-03-20 18:30:57,416 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [49452891] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:30:57,416 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:30:57,416 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [79] imperfect sequences [] total 79 [2022-03-20 18:30:57,416 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1401318703] [2022-03-20 18:30:57,416 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:30:57,416 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 79 states [2022-03-20 18:30:57,416 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:30:57,417 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 79 interpolants. [2022-03-20 18:30:57,417 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=6007, Unknown=0, NotChecked=0, Total=6162 [2022-03-20 18:30:57,417 INFO L87 Difference]: Start difference. First operand 162 states and 162 transitions. Second operand has 79 states, 79 states have (on average 1.9873417721518987) internal successors, (157), 78 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) [2022-03-20 18:31:02,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:31:02,342 INFO L93 Difference]: Finished difference Result 170 states and 170 transitions. [2022-03-20 18:31:02,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2022-03-20 18:31:02,342 INFO L78 Accepts]: Start accepts. Automaton has has 79 states, 79 states have (on average 1.9873417721518987) internal successors, (157), 78 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 [2022-03-20 18:31:02,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:31:02,342 INFO L225 Difference]: With dead ends: 170 [2022-03-20 18:31:02,342 INFO L226 Difference]: Without dead ends: 165 [2022-03-20 18:31:02,343 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 238 GetRequests, 44 SyntacticMatches, 41 SemanticMatches, 153 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2850 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=459, Invalid=23411, Unknown=0, NotChecked=0, Total=23870 [2022-03-20 18:31:02,343 INFO L913 BasicCegarLoop]: 11 mSDtfsCounter, 84 mSDsluCounter, 382 mSDsCounter, 0 mSdLazyCounter, 12009 mSolverCounterSat, 78 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 393 SdHoareTripleChecker+Invalid, 12087 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 78 IncrementalHoareTripleChecker+Valid, 12009 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2022-03-20 18:31:02,344 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [84 Valid, 393 Invalid, 12087 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [78 Valid, 12009 Invalid, 0 Unknown, 0 Unchecked, 2.9s Time] [2022-03-20 18:31:02,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2022-03-20 18:31:02,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 164. [2022-03-20 18:31:02,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 164 states, 159 states have (on average 1.0062893081761006) internal successors, (160), 159 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) [2022-03-20 18:31:02,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 164 transitions. [2022-03-20 18:31:02,379 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 164 transitions. Word has length 161 [2022-03-20 18:31:02,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:31:02,380 INFO L478 AbstractCegarLoop]: Abstraction has 164 states and 164 transitions. [2022-03-20 18:31:02,380 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 79 states, 79 states have (on average 1.9873417721518987) internal successors, (157), 78 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) [2022-03-20 18:31:02,380 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 164 transitions. [2022-03-20 18:31:02,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2022-03-20 18:31:02,380 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:31:02,380 INFO L499 BasicCegarLoop]: trace histogram [76, 76, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:31:02,380 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2022-03-20 18:31:02,381 INFO L403 AbstractCegarLoop]: === Iteration 77 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:31:02,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:31:02,381 INFO L85 PathProgramCache]: Analyzing trace with hash 790762808, now seen corresponding path program 76 times [2022-03-20 18:31:02,381 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:31:02,381 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1176744272] [2022-03-20 18:31:02,405 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 18:31:02,405 INFO L85 PathProgramCache]: Analyzing trace with hash -1354594478, now seen corresponding path program 1 times [2022-03-20 18:31:02,405 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:31:02,405 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1671230847] [2022-03-20 18:31:02,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:31:02,405 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:31:02,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:31:02,421 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:31:02,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:31:02,423 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:31:02,423 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:31:02,423 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1671230847] [2022-03-20 18:31:02,423 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1671230847] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:31:02,423 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:31:02,423 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 18:31:04,820 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:31:04,820 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1176744272] [2022-03-20 18:31:04,821 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1176744272] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:31:04,821 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:31:04,821 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [80] imperfect sequences [] total 80 [2022-03-20 18:31:04,821 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1651924779] [2022-03-20 18:31:04,821 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:31:04,821 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 80 states [2022-03-20 18:31:04,821 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:31:04,821 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2022-03-20 18:31:04,822 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=6163, Unknown=0, NotChecked=0, Total=6320 [2022-03-20 18:31:04,822 INFO L87 Difference]: Start difference. First operand 164 states and 164 transitions. Second operand has 80 states, 80 states have (on average 1.9875) internal successors, (159), 79 states have internal predecessors, (159), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:31:09,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:31:09,951 INFO L93 Difference]: Finished difference Result 172 states and 172 transitions. [2022-03-20 18:31:09,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2022-03-20 18:31:09,951 INFO L78 Accepts]: Start accepts. Automaton has has 80 states, 80 states have (on average 1.9875) internal successors, (159), 79 states have internal predecessors, (159), 2 states have call successors, (3), 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 163 [2022-03-20 18:31:09,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:31:09,952 INFO L225 Difference]: With dead ends: 172 [2022-03-20 18:31:09,952 INFO L226 Difference]: Without dead ends: 167 [2022-03-20 18:31:09,953 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 241 GetRequests, 51 SyntacticMatches, 35 SemanticMatches, 155 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2926 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=465, Invalid=24027, Unknown=0, NotChecked=0, Total=24492 [2022-03-20 18:31:09,953 INFO L913 BasicCegarLoop]: 11 mSDtfsCounter, 85 mSDsluCounter, 387 mSDsCounter, 0 mSdLazyCounter, 12321 mSolverCounterSat, 79 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 398 SdHoareTripleChecker+Invalid, 12400 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 79 IncrementalHoareTripleChecker+Valid, 12321 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2022-03-20 18:31:09,953 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [85 Valid, 398 Invalid, 12400 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [79 Valid, 12321 Invalid, 0 Unknown, 0 Unchecked, 3.0s Time] [2022-03-20 18:31:09,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2022-03-20 18:31:09,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 166. [2022-03-20 18:31:09,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 166 states, 161 states have (on average 1.0062111801242235) internal successors, (162), 161 states have internal predecessors, (162), 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) [2022-03-20 18:31:09,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 166 transitions. [2022-03-20 18:31:09,989 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 166 transitions. Word has length 163 [2022-03-20 18:31:09,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:31:09,989 INFO L478 AbstractCegarLoop]: Abstraction has 166 states and 166 transitions. [2022-03-20 18:31:09,990 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 80 states, 80 states have (on average 1.9875) internal successors, (159), 79 states have internal predecessors, (159), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:31:09,990 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 166 transitions. [2022-03-20 18:31:09,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2022-03-20 18:31:09,990 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:31:09,990 INFO L499 BasicCegarLoop]: trace histogram [77, 77, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:31:09,990 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2022-03-20 18:31:09,990 INFO L403 AbstractCegarLoop]: === Iteration 78 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:31:09,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:31:09,991 INFO L85 PathProgramCache]: Analyzing trace with hash 815842454, now seen corresponding path program 77 times [2022-03-20 18:31:09,991 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:31:09,991 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1981239758] [2022-03-20 18:31:10,012 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 18:31:10,013 INFO L85 PathProgramCache]: Analyzing trace with hash -1295489134, now seen corresponding path program 1 times [2022-03-20 18:31:10,013 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:31:10,013 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [39170767] [2022-03-20 18:31:10,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:31:10,013 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:31:10,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:31:10,027 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:31:10,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:31:10,029 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:31:10,029 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:31:10,030 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [39170767] [2022-03-20 18:31:10,030 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [39170767] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:31:10,030 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:31:10,030 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 18:31:12,593 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:31:12,593 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1981239758] [2022-03-20 18:31:12,593 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1981239758] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:31:12,593 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:31:12,593 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [81] imperfect sequences [] total 81 [2022-03-20 18:31:12,593 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1435357396] [2022-03-20 18:31:12,593 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:31:12,594 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 81 states [2022-03-20 18:31:12,594 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:31:12,594 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 81 interpolants. [2022-03-20 18:31:12,595 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=159, Invalid=6321, Unknown=0, NotChecked=0, Total=6480 [2022-03-20 18:31:12,595 INFO L87 Difference]: Start difference. First operand 166 states and 166 transitions. Second operand has 81 states, 81 states have (on average 1.9876543209876543) internal successors, (161), 80 states have internal predecessors, (161), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:31:17,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:31:17,721 INFO L93 Difference]: Finished difference Result 174 states and 174 transitions. [2022-03-20 18:31:17,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2022-03-20 18:31:17,721 INFO L78 Accepts]: Start accepts. Automaton has has 81 states, 81 states have (on average 1.9876543209876543) internal successors, (161), 80 states have internal predecessors, (161), 2 states have call successors, (3), 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 165 [2022-03-20 18:31:17,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:31:17,722 INFO L225 Difference]: With dead ends: 174 [2022-03-20 18:31:17,722 INFO L226 Difference]: Without dead ends: 169 [2022-03-20 18:31:17,723 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 244 GetRequests, 49 SyntacticMatches, 38 SemanticMatches, 157 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3003 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=471, Invalid=24651, Unknown=0, NotChecked=0, Total=25122 [2022-03-20 18:31:17,723 INFO L913 BasicCegarLoop]: 11 mSDtfsCounter, 86 mSDsluCounter, 392 mSDsCounter, 0 mSdLazyCounter, 12637 mSolverCounterSat, 80 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 403 SdHoareTripleChecker+Invalid, 12717 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 80 IncrementalHoareTripleChecker+Valid, 12637 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2022-03-20 18:31:17,723 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [86 Valid, 403 Invalid, 12717 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [80 Valid, 12637 Invalid, 0 Unknown, 0 Unchecked, 3.0s Time] [2022-03-20 18:31:17,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2022-03-20 18:31:17,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 168. [2022-03-20 18:31:17,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 168 states, 163 states have (on average 1.0061349693251533) internal successors, (164), 163 states have internal predecessors, (164), 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) [2022-03-20 18:31:17,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 168 transitions. [2022-03-20 18:31:17,763 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 168 transitions. Word has length 165 [2022-03-20 18:31:17,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:31:17,763 INFO L478 AbstractCegarLoop]: Abstraction has 168 states and 168 transitions. [2022-03-20 18:31:17,763 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 81 states, 81 states have (on average 1.9876543209876543) internal successors, (161), 80 states have internal predecessors, (161), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:31:17,763 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 168 transitions. [2022-03-20 18:31:17,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2022-03-20 18:31:17,764 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:31:17,764 INFO L499 BasicCegarLoop]: trace histogram [78, 78, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:31:17,764 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2022-03-20 18:31:17,764 INFO L403 AbstractCegarLoop]: === Iteration 79 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:31:17,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:31:17,764 INFO L85 PathProgramCache]: Analyzing trace with hash -852421516, now seen corresponding path program 78 times [2022-03-20 18:31:17,764 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:31:17,764 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1800053693] [2022-03-20 18:31:17,787 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 18:31:17,787 INFO L85 PathProgramCache]: Analyzing trace with hash -1236383790, now seen corresponding path program 1 times [2022-03-20 18:31:17,787 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:31:17,787 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1661207187] [2022-03-20 18:31:17,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:31:17,788 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:31:17,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:31:17,800 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:31:17,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:31:17,804 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:31:17,804 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:31:17,804 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1661207187] [2022-03-20 18:31:17,804 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1661207187] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:31:17,804 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:31:17,805 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 18:31:20,493 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:31:20,494 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1800053693] [2022-03-20 18:31:20,494 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1800053693] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:31:20,494 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:31:20,494 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [82] imperfect sequences [] total 82 [2022-03-20 18:31:20,494 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1622291266] [2022-03-20 18:31:20,494 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:31:20,494 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 82 states [2022-03-20 18:31:20,494 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:31:20,494 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2022-03-20 18:31:20,495 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=161, Invalid=6481, Unknown=0, NotChecked=0, Total=6642 [2022-03-20 18:31:20,495 INFO L87 Difference]: Start difference. First operand 168 states and 168 transitions. Second operand has 82 states, 82 states have (on average 1.9878048780487805) internal successors, (163), 81 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) [2022-03-20 18:31:25,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:31:25,826 INFO L93 Difference]: Finished difference Result 176 states and 176 transitions. [2022-03-20 18:31:25,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2022-03-20 18:31:25,827 INFO L78 Accepts]: Start accepts. Automaton has has 82 states, 82 states have (on average 1.9878048780487805) internal successors, (163), 81 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 [2022-03-20 18:31:25,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:31:25,827 INFO L225 Difference]: With dead ends: 176 [2022-03-20 18:31:25,827 INFO L226 Difference]: Without dead ends: 171 [2022-03-20 18:31:25,828 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 247 GetRequests, 49 SyntacticMatches, 39 SemanticMatches, 159 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3081 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=477, Invalid=25283, Unknown=0, NotChecked=0, Total=25760 [2022-03-20 18:31:25,828 INFO L913 BasicCegarLoop]: 11 mSDtfsCounter, 87 mSDsluCounter, 397 mSDsCounter, 0 mSdLazyCounter, 12957 mSolverCounterSat, 81 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 408 SdHoareTripleChecker+Invalid, 13038 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 81 IncrementalHoareTripleChecker+Valid, 12957 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2022-03-20 18:31:25,828 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [87 Valid, 408 Invalid, 13038 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [81 Valid, 12957 Invalid, 0 Unknown, 0 Unchecked, 3.1s Time] [2022-03-20 18:31:25,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2022-03-20 18:31:25,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 170. [2022-03-20 18:31:25,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 170 states, 165 states have (on average 1.006060606060606) internal successors, (166), 165 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) [2022-03-20 18:31:25,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 170 transitions. [2022-03-20 18:31:25,884 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 170 transitions. Word has length 167 [2022-03-20 18:31:25,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:31:25,884 INFO L478 AbstractCegarLoop]: Abstraction has 170 states and 170 transitions. [2022-03-20 18:31:25,884 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 82 states, 82 states have (on average 1.9878048780487805) internal successors, (163), 81 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) [2022-03-20 18:31:25,884 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 170 transitions. [2022-03-20 18:31:25,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2022-03-20 18:31:25,885 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:31:25,885 INFO L499 BasicCegarLoop]: trace histogram [79, 79, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:31:25,885 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2022-03-20 18:31:25,885 INFO L403 AbstractCegarLoop]: === Iteration 80 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:31:25,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:31:25,885 INFO L85 PathProgramCache]: Analyzing trace with hash -2031295278, now seen corresponding path program 79 times [2022-03-20 18:31:25,885 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:31:25,885 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [153053801] [2022-03-20 18:31:25,906 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 18:31:25,906 INFO L85 PathProgramCache]: Analyzing trace with hash -1177278446, now seen corresponding path program 1 times [2022-03-20 18:31:25,906 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:31:25,906 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1661895084] [2022-03-20 18:31:25,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:31:25,906 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:31:25,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:31:25,918 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:31:25,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:31:25,920 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:31:25,920 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:31:25,920 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1661895084] [2022-03-20 18:31:25,920 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1661895084] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:31:25,920 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:31:25,920 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 18:31:28,532 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:31:28,532 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [153053801] [2022-03-20 18:31:28,532 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [153053801] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:31:28,532 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:31:28,532 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [83] imperfect sequences [] total 83 [2022-03-20 18:31:28,532 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1195941800] [2022-03-20 18:31:28,532 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:31:28,532 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 83 states [2022-03-20 18:31:28,532 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:31:28,533 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2022-03-20 18:31:28,533 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=163, Invalid=6643, Unknown=0, NotChecked=0, Total=6806 [2022-03-20 18:31:28,533 INFO L87 Difference]: Start difference. First operand 170 states and 170 transitions. Second operand has 83 states, 83 states have (on average 1.9879518072289157) internal successors, (165), 82 states have internal predecessors, (165), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:31:33,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:31:33,957 INFO L93 Difference]: Finished difference Result 178 states and 178 transitions. [2022-03-20 18:31:33,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2022-03-20 18:31:33,958 INFO L78 Accepts]: Start accepts. Automaton has has 83 states, 83 states have (on average 1.9879518072289157) internal successors, (165), 82 states have internal predecessors, (165), 2 states have call successors, (3), 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 169 [2022-03-20 18:31:33,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:31:33,958 INFO L225 Difference]: With dead ends: 178 [2022-03-20 18:31:33,958 INFO L226 Difference]: Without dead ends: 173 [2022-03-20 18:31:33,959 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 250 GetRequests, 56 SyntacticMatches, 33 SemanticMatches, 161 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3160 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=483, Invalid=25923, Unknown=0, NotChecked=0, Total=26406 [2022-03-20 18:31:33,960 INFO L913 BasicCegarLoop]: 11 mSDtfsCounter, 88 mSDsluCounter, 402 mSDsCounter, 0 mSdLazyCounter, 13281 mSolverCounterSat, 82 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 413 SdHoareTripleChecker+Invalid, 13363 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 82 IncrementalHoareTripleChecker+Valid, 13281 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2022-03-20 18:31:33,960 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [88 Valid, 413 Invalid, 13363 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [82 Valid, 13281 Invalid, 0 Unknown, 0 Unchecked, 3.2s Time] [2022-03-20 18:31:33,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2022-03-20 18:31:33,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 172. [2022-03-20 18:31:33,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 172 states, 167 states have (on average 1.0059880239520957) internal successors, (168), 167 states have internal predecessors, (168), 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) [2022-03-20 18:31:33,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 172 transitions. [2022-03-20 18:31:33,999 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 172 transitions. Word has length 169 [2022-03-20 18:31:33,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:31:33,999 INFO L478 AbstractCegarLoop]: Abstraction has 172 states and 172 transitions. [2022-03-20 18:31:33,999 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 83 states, 83 states have (on average 1.9879518072289157) internal successors, (165), 82 states have internal predecessors, (165), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:31:33,999 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 172 transitions. [2022-03-20 18:31:34,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2022-03-20 18:31:34,000 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:31:34,000 INFO L499 BasicCegarLoop]: trace histogram [80, 80, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:31:34,000 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2022-03-20 18:31:34,000 INFO L403 AbstractCegarLoop]: === Iteration 81 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:31:34,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:31:34,000 INFO L85 PathProgramCache]: Analyzing trace with hash -1057614416, now seen corresponding path program 80 times [2022-03-20 18:31:34,000 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:31:34,000 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1169523794] [2022-03-20 18:31:34,020 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 18:31:34,020 INFO L85 PathProgramCache]: Analyzing trace with hash -1118173102, now seen corresponding path program 1 times [2022-03-20 18:31:34,021 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:31:34,021 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1611980034] [2022-03-20 18:31:34,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:31:34,021 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:31:34,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:31:34,032 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:31:34,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:31:34,034 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:31:34,034 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:31:34,034 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1611980034] [2022-03-20 18:31:34,034 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1611980034] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:31:34,034 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:31:34,034 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 18:31:37,040 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:31:37,040 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1169523794] [2022-03-20 18:31:37,040 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1169523794] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:31:37,040 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:31:37,040 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [84] imperfect sequences [] total 84 [2022-03-20 18:31:37,040 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1559233581] [2022-03-20 18:31:37,040 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:31:37,041 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 84 states [2022-03-20 18:31:37,041 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:31:37,041 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2022-03-20 18:31:37,041 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=165, Invalid=6807, Unknown=0, NotChecked=0, Total=6972 [2022-03-20 18:31:37,041 INFO L87 Difference]: Start difference. First operand 172 states and 172 transitions. Second operand has 84 states, 84 states have (on average 1.9880952380952381) internal successors, (167), 83 states have internal predecessors, (167), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:31:42,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:31:42,527 INFO L93 Difference]: Finished difference Result 180 states and 180 transitions. [2022-03-20 18:31:42,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2022-03-20 18:31:42,527 INFO L78 Accepts]: Start accepts. Automaton has has 84 states, 84 states have (on average 1.9880952380952381) internal successors, (167), 83 states have internal predecessors, (167), 2 states have call successors, (3), 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 171 [2022-03-20 18:31:42,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:31:42,528 INFO L225 Difference]: With dead ends: 180 [2022-03-20 18:31:42,528 INFO L226 Difference]: Without dead ends: 175 [2022-03-20 18:31:42,529 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 253 GetRequests, 46 SyntacticMatches, 44 SemanticMatches, 163 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3240 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=489, Invalid=26571, Unknown=0, NotChecked=0, Total=27060 [2022-03-20 18:31:42,529 INFO L913 BasicCegarLoop]: 11 mSDtfsCounter, 89 mSDsluCounter, 407 mSDsCounter, 0 mSdLazyCounter, 13609 mSolverCounterSat, 83 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 418 SdHoareTripleChecker+Invalid, 13692 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 83 IncrementalHoareTripleChecker+Valid, 13609 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2022-03-20 18:31:42,529 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [89 Valid, 418 Invalid, 13692 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [83 Valid, 13609 Invalid, 0 Unknown, 0 Unchecked, 3.2s Time] [2022-03-20 18:31:42,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2022-03-20 18:31:42,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 174. [2022-03-20 18:31:42,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 174 states, 169 states have (on average 1.0059171597633136) internal successors, (170), 169 states have internal predecessors, (170), 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) [2022-03-20 18:31:42,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 174 transitions. [2022-03-20 18:31:42,569 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 174 transitions. Word has length 171 [2022-03-20 18:31:42,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:31:42,569 INFO L478 AbstractCegarLoop]: Abstraction has 174 states and 174 transitions. [2022-03-20 18:31:42,569 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 84 states, 84 states have (on average 1.9880952380952381) internal successors, (167), 83 states have internal predecessors, (167), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:31:42,569 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 174 transitions. [2022-03-20 18:31:42,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2022-03-20 18:31:42,570 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:31:42,570 INFO L499 BasicCegarLoop]: trace histogram [81, 81, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:31:42,571 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2022-03-20 18:31:42,571 INFO L403 AbstractCegarLoop]: === Iteration 82 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:31:42,571 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:31:42,571 INFO L85 PathProgramCache]: Analyzing trace with hash -1653176562, now seen corresponding path program 81 times [2022-03-20 18:31:42,571 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:31:42,571 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [491666479] [2022-03-20 18:31:42,594 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 18:31:42,594 INFO L85 PathProgramCache]: Analyzing trace with hash -1059067758, now seen corresponding path program 1 times [2022-03-20 18:31:42,594 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:31:42,594 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [335551692] [2022-03-20 18:31:42,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:31:42,594 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:31:42,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:31:42,606 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:31:42,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:31:42,608 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:31:42,608 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:31:42,608 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [335551692] [2022-03-20 18:31:42,608 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [335551692] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:31:42,608 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:31:42,608 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 18:31:45,264 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:31:45,264 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [491666479] [2022-03-20 18:31:45,264 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [491666479] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:31:45,264 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:31:45,264 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [85] imperfect sequences [] total 85 [2022-03-20 18:31:45,265 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1184402368] [2022-03-20 18:31:45,265 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:31:45,265 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 85 states [2022-03-20 18:31:45,265 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:31:45,265 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 85 interpolants. [2022-03-20 18:31:45,266 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=167, Invalid=6973, Unknown=0, NotChecked=0, Total=7140 [2022-03-20 18:31:45,266 INFO L87 Difference]: Start difference. First operand 174 states and 174 transitions. Second operand has 85 states, 85 states have (on average 1.988235294117647) internal successors, (169), 84 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) [2022-03-20 18:31:50,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:31:50,870 INFO L93 Difference]: Finished difference Result 182 states and 182 transitions. [2022-03-20 18:31:50,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2022-03-20 18:31:50,870 INFO L78 Accepts]: Start accepts. Automaton has has 85 states, 85 states have (on average 1.988235294117647) internal successors, (169), 84 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 [2022-03-20 18:31:50,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:31:50,871 INFO L225 Difference]: With dead ends: 182 [2022-03-20 18:31:50,871 INFO L226 Difference]: Without dead ends: 177 [2022-03-20 18:31:50,872 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 256 GetRequests, 57 SyntacticMatches, 34 SemanticMatches, 165 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3321 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=495, Invalid=27227, Unknown=0, NotChecked=0, Total=27722 [2022-03-20 18:31:50,872 INFO L913 BasicCegarLoop]: 11 mSDtfsCounter, 90 mSDsluCounter, 412 mSDsCounter, 0 mSdLazyCounter, 13941 mSolverCounterSat, 84 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 423 SdHoareTripleChecker+Invalid, 14025 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 84 IncrementalHoareTripleChecker+Valid, 13941 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.3s IncrementalHoareTripleChecker+Time [2022-03-20 18:31:50,872 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [90 Valid, 423 Invalid, 14025 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [84 Valid, 13941 Invalid, 0 Unknown, 0 Unchecked, 3.3s Time] [2022-03-20 18:31:50,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2022-03-20 18:31:50,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 176. [2022-03-20 18:31:50,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 176 states, 171 states have (on average 1.0058479532163742) internal successors, (172), 171 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) [2022-03-20 18:31:50,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 176 transitions. [2022-03-20 18:31:50,923 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 176 transitions. Word has length 173 [2022-03-20 18:31:50,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:31:50,923 INFO L478 AbstractCegarLoop]: Abstraction has 176 states and 176 transitions. [2022-03-20 18:31:50,924 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 85 states, 85 states have (on average 1.988235294117647) internal successors, (169), 84 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) [2022-03-20 18:31:50,924 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 176 transitions. [2022-03-20 18:31:50,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2022-03-20 18:31:50,924 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:31:50,924 INFO L499 BasicCegarLoop]: trace histogram [82, 82, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:31:50,924 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2022-03-20 18:31:50,925 INFO L403 AbstractCegarLoop]: === Iteration 83 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:31:50,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:31:50,925 INFO L85 PathProgramCache]: Analyzing trace with hash 1537218796, now seen corresponding path program 82 times [2022-03-20 18:31:50,925 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:31:50,925 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [10444979] [2022-03-20 18:31:50,953 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 18:31:50,953 INFO L85 PathProgramCache]: Analyzing trace with hash -999962414, now seen corresponding path program 1 times [2022-03-20 18:31:50,953 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:31:50,953 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [552291896] [2022-03-20 18:31:50,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:31:50,953 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:31:50,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:31:50,968 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:31:50,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:31:50,970 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:31:50,971 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:31:50,971 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [552291896] [2022-03-20 18:31:50,971 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [552291896] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:31:50,971 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:31:50,971 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 18:31:54,044 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:31:54,045 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [10444979] [2022-03-20 18:31:54,045 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [10444979] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:31:54,045 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:31:54,045 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [86] imperfect sequences [] total 86 [2022-03-20 18:31:54,045 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [541592672] [2022-03-20 18:31:54,045 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:31:54,045 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 86 states [2022-03-20 18:31:54,045 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:31:54,045 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2022-03-20 18:31:54,046 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=169, Invalid=7141, Unknown=0, NotChecked=0, Total=7310 [2022-03-20 18:31:54,046 INFO L87 Difference]: Start difference. First operand 176 states and 176 transitions. Second operand has 86 states, 86 states have (on average 1.9883720930232558) internal successors, (171), 85 states have internal predecessors, (171), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:31:59,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:31:59,810 INFO L93 Difference]: Finished difference Result 184 states and 184 transitions. [2022-03-20 18:31:59,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2022-03-20 18:31:59,810 INFO L78 Accepts]: Start accepts. Automaton has has 86 states, 86 states have (on average 1.9883720930232558) internal successors, (171), 85 states have internal predecessors, (171), 2 states have call successors, (3), 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 175 [2022-03-20 18:31:59,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:31:59,811 INFO L225 Difference]: With dead ends: 184 [2022-03-20 18:31:59,811 INFO L226 Difference]: Without dead ends: 179 [2022-03-20 18:31:59,812 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 259 GetRequests, 48 SyntacticMatches, 44 SemanticMatches, 167 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3403 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=501, Invalid=27891, Unknown=0, NotChecked=0, Total=28392 [2022-03-20 18:31:59,812 INFO L913 BasicCegarLoop]: 11 mSDtfsCounter, 91 mSDsluCounter, 417 mSDsCounter, 0 mSdLazyCounter, 14277 mSolverCounterSat, 85 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 428 SdHoareTripleChecker+Invalid, 14362 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 85 IncrementalHoareTripleChecker+Valid, 14277 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.4s IncrementalHoareTripleChecker+Time [2022-03-20 18:31:59,812 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [91 Valid, 428 Invalid, 14362 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [85 Valid, 14277 Invalid, 0 Unknown, 0 Unchecked, 3.4s Time] [2022-03-20 18:31:59,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2022-03-20 18:31:59,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 178. [2022-03-20 18:31:59,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 178 states, 173 states have (on average 1.0057803468208093) internal successors, (174), 173 states have internal predecessors, (174), 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) [2022-03-20 18:31:59,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 178 transitions. [2022-03-20 18:31:59,859 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 178 transitions. Word has length 175 [2022-03-20 18:31:59,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:31:59,859 INFO L478 AbstractCegarLoop]: Abstraction has 178 states and 178 transitions. [2022-03-20 18:31:59,859 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 86 states, 86 states have (on average 1.9883720930232558) internal successors, (171), 85 states have internal predecessors, (171), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:31:59,859 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 178 transitions. [2022-03-20 18:31:59,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 178 [2022-03-20 18:31:59,860 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:31:59,860 INFO L499 BasicCegarLoop]: trace histogram [83, 83, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:31:59,860 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2022-03-20 18:31:59,860 INFO L403 AbstractCegarLoop]: === Iteration 84 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:31:59,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:31:59,860 INFO L85 PathProgramCache]: Analyzing trace with hash 900508490, now seen corresponding path program 83 times [2022-03-20 18:31:59,860 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:31:59,860 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [699002619] [2022-03-20 18:31:59,882 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 18:31:59,882 INFO L85 PathProgramCache]: Analyzing trace with hash -940857070, now seen corresponding path program 1 times [2022-03-20 18:31:59,882 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:31:59,882 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1336468633] [2022-03-20 18:31:59,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:31:59,882 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:31:59,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:31:59,898 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:31:59,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:31:59,900 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:31:59,901 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:31:59,901 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1336468633] [2022-03-20 18:31:59,901 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1336468633] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:31:59,901 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:31:59,901 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 18:32:02,953 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:32:02,954 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [699002619] [2022-03-20 18:32:02,954 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [699002619] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:32:02,954 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:32:02,954 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [87] imperfect sequences [] total 87 [2022-03-20 18:32:02,954 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [27774666] [2022-03-20 18:32:02,954 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:32:02,954 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 87 states [2022-03-20 18:32:02,954 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:32:02,954 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 87 interpolants. [2022-03-20 18:32:02,955 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=7311, Unknown=0, NotChecked=0, Total=7482 [2022-03-20 18:32:02,955 INFO L87 Difference]: Start difference. First operand 178 states and 178 transitions. Second operand has 87 states, 87 states have (on average 1.9885057471264367) internal successors, (173), 86 states have internal predecessors, (173), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:32:08,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:32:08,808 INFO L93 Difference]: Finished difference Result 186 states and 186 transitions. [2022-03-20 18:32:08,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2022-03-20 18:32:08,808 INFO L78 Accepts]: Start accepts. Automaton has has 87 states, 87 states have (on average 1.9885057471264367) internal successors, (173), 86 states have internal predecessors, (173), 2 states have call successors, (3), 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 177 [2022-03-20 18:32:08,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:32:08,809 INFO L225 Difference]: With dead ends: 186 [2022-03-20 18:32:08,809 INFO L226 Difference]: Without dead ends: 181 [2022-03-20 18:32:08,810 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 262 GetRequests, 47 SyntacticMatches, 46 SemanticMatches, 169 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3486 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=507, Invalid=28563, Unknown=0, NotChecked=0, Total=29070 [2022-03-20 18:32:08,810 INFO L913 BasicCegarLoop]: 11 mSDtfsCounter, 92 mSDsluCounter, 422 mSDsCounter, 0 mSdLazyCounter, 14617 mSolverCounterSat, 86 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 433 SdHoareTripleChecker+Invalid, 14703 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 86 IncrementalHoareTripleChecker+Valid, 14617 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.4s IncrementalHoareTripleChecker+Time [2022-03-20 18:32:08,810 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [92 Valid, 433 Invalid, 14703 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [86 Valid, 14617 Invalid, 0 Unknown, 0 Unchecked, 3.4s Time] [2022-03-20 18:32:08,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2022-03-20 18:32:08,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 180. [2022-03-20 18:32:08,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 180 states, 175 states have (on average 1.0057142857142858) internal successors, (176), 175 states have internal predecessors, (176), 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) [2022-03-20 18:32:08,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 180 transitions. [2022-03-20 18:32:08,858 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 180 transitions. Word has length 177 [2022-03-20 18:32:08,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:32:08,858 INFO L478 AbstractCegarLoop]: Abstraction has 180 states and 180 transitions. [2022-03-20 18:32:08,858 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 87 states, 87 states have (on average 1.9885057471264367) internal successors, (173), 86 states have internal predecessors, (173), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:32:08,858 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 180 transitions. [2022-03-20 18:32:08,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2022-03-20 18:32:08,859 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:32:08,859 INFO L499 BasicCegarLoop]: trace histogram [84, 84, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:32:08,859 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83 [2022-03-20 18:32:08,859 INFO L403 AbstractCegarLoop]: === Iteration 85 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:32:08,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:32:08,859 INFO L85 PathProgramCache]: Analyzing trace with hash -1092739544, now seen corresponding path program 84 times [2022-03-20 18:32:08,859 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:32:08,859 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2133804761] [2022-03-20 18:32:08,881 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 18:32:08,881 INFO L85 PathProgramCache]: Analyzing trace with hash -881751726, now seen corresponding path program 1 times [2022-03-20 18:32:08,881 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:32:08,881 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [664821991] [2022-03-20 18:32:08,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:32:08,882 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:32:08,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:32:08,896 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:32:08,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:32:08,898 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:32:08,898 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:32:08,898 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [664821991] [2022-03-20 18:32:08,898 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [664821991] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:32:08,899 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:32:08,899 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 18:32:11,941 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:32:11,941 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2133804761] [2022-03-20 18:32:11,942 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2133804761] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:32:11,942 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:32:11,942 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [88] imperfect sequences [] total 88 [2022-03-20 18:32:11,942 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [729998037] [2022-03-20 18:32:11,942 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:32:11,942 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 88 states [2022-03-20 18:32:11,942 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:32:11,942 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 88 interpolants. [2022-03-20 18:32:11,943 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=7483, Unknown=0, NotChecked=0, Total=7656 [2022-03-20 18:32:11,943 INFO L87 Difference]: Start difference. First operand 180 states and 180 transitions. Second operand has 88 states, 88 states have (on average 1.9886363636363635) internal successors, (175), 87 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) [2022-03-20 18:32:17,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:32:17,886 INFO L93 Difference]: Finished difference Result 188 states and 188 transitions. [2022-03-20 18:32:17,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2022-03-20 18:32:17,887 INFO L78 Accepts]: Start accepts. Automaton has has 88 states, 88 states have (on average 1.9886363636363635) internal successors, (175), 87 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 [2022-03-20 18:32:17,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:32:17,888 INFO L225 Difference]: With dead ends: 188 [2022-03-20 18:32:17,888 INFO L226 Difference]: Without dead ends: 183 [2022-03-20 18:32:17,889 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 265 GetRequests, 57 SyntacticMatches, 37 SemanticMatches, 171 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3570 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=513, Invalid=29243, Unknown=0, NotChecked=0, Total=29756 [2022-03-20 18:32:17,889 INFO L913 BasicCegarLoop]: 11 mSDtfsCounter, 93 mSDsluCounter, 427 mSDsCounter, 0 mSdLazyCounter, 14961 mSolverCounterSat, 87 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 438 SdHoareTripleChecker+Invalid, 15048 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 87 IncrementalHoareTripleChecker+Valid, 14961 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.5s IncrementalHoareTripleChecker+Time [2022-03-20 18:32:17,889 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [93 Valid, 438 Invalid, 15048 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [87 Valid, 14961 Invalid, 0 Unknown, 0 Unchecked, 3.5s Time] [2022-03-20 18:32:17,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2022-03-20 18:32:17,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 182. [2022-03-20 18:32:17,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 182 states, 177 states have (on average 1.0056497175141244) internal successors, (178), 177 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) [2022-03-20 18:32:17,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 182 transitions. [2022-03-20 18:32:17,938 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 182 transitions. Word has length 179 [2022-03-20 18:32:17,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:32:17,938 INFO L478 AbstractCegarLoop]: Abstraction has 182 states and 182 transitions. [2022-03-20 18:32:17,938 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 88 states, 88 states have (on average 1.9886363636363635) internal successors, (175), 87 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) [2022-03-20 18:32:17,938 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 182 transitions. [2022-03-20 18:32:17,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 182 [2022-03-20 18:32:17,938 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:32:17,939 INFO L499 BasicCegarLoop]: trace histogram [85, 85, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:32:17,939 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84 [2022-03-20 18:32:17,939 INFO L403 AbstractCegarLoop]: === Iteration 86 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:32:17,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:32:17,939 INFO L85 PathProgramCache]: Analyzing trace with hash -1048686202, now seen corresponding path program 85 times [2022-03-20 18:32:17,939 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:32:17,939 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1821042058] [2022-03-20 18:32:17,960 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 18:32:17,961 INFO L85 PathProgramCache]: Analyzing trace with hash -822646382, now seen corresponding path program 1 times [2022-03-20 18:32:17,961 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:32:17,961 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [256953462] [2022-03-20 18:32:17,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:32:17,961 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:32:17,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:32:17,989 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:32:17,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:32:17,991 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:32:17,992 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:32:17,992 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [256953462] [2022-03-20 18:32:17,992 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [256953462] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:32:17,992 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:32:17,992 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 18:32:20,960 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:32:20,960 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1821042058] [2022-03-20 18:32:20,960 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1821042058] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:32:20,960 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:32:20,960 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [89] imperfect sequences [] total 89 [2022-03-20 18:32:20,960 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2063691483] [2022-03-20 18:32:20,960 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:32:20,961 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 89 states [2022-03-20 18:32:20,961 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:32:20,961 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 89 interpolants. [2022-03-20 18:32:20,961 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=175, Invalid=7657, Unknown=0, NotChecked=0, Total=7832 [2022-03-20 18:32:20,962 INFO L87 Difference]: Start difference. First operand 182 states and 182 transitions. Second operand has 89 states, 89 states have (on average 1.9887640449438202) internal successors, (177), 88 states have internal predecessors, (177), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:32:27,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:32:27,089 INFO L93 Difference]: Finished difference Result 190 states and 190 transitions. [2022-03-20 18:32:27,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2022-03-20 18:32:27,089 INFO L78 Accepts]: Start accepts. Automaton has has 89 states, 89 states have (on average 1.9887640449438202) internal successors, (177), 88 states have internal predecessors, (177), 2 states have call successors, (3), 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 181 [2022-03-20 18:32:27,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:32:27,090 INFO L225 Difference]: With dead ends: 190 [2022-03-20 18:32:27,090 INFO L226 Difference]: Without dead ends: 185 [2022-03-20 18:32:27,091 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 268 GetRequests, 59 SyntacticMatches, 36 SemanticMatches, 173 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3655 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=519, Invalid=29931, Unknown=0, NotChecked=0, Total=30450 [2022-03-20 18:32:27,091 INFO L913 BasicCegarLoop]: 11 mSDtfsCounter, 94 mSDsluCounter, 432 mSDsCounter, 0 mSdLazyCounter, 15309 mSolverCounterSat, 88 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 94 SdHoareTripleChecker+Valid, 443 SdHoareTripleChecker+Invalid, 15397 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 88 IncrementalHoareTripleChecker+Valid, 15309 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.6s IncrementalHoareTripleChecker+Time [2022-03-20 18:32:27,091 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [94 Valid, 443 Invalid, 15397 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [88 Valid, 15309 Invalid, 0 Unknown, 0 Unchecked, 3.6s Time] [2022-03-20 18:32:27,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2022-03-20 18:32:27,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 184. [2022-03-20 18:32:27,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 184 states, 179 states have (on average 1.005586592178771) internal successors, (180), 179 states have internal predecessors, (180), 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) [2022-03-20 18:32:27,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 184 transitions. [2022-03-20 18:32:27,137 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 184 transitions. Word has length 181 [2022-03-20 18:32:27,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:32:27,137 INFO L478 AbstractCegarLoop]: Abstraction has 184 states and 184 transitions. [2022-03-20 18:32:27,137 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 89 states, 89 states have (on average 1.9887640449438202) internal successors, (177), 88 states have internal predecessors, (177), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:32:27,137 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 184 transitions. [2022-03-20 18:32:27,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 184 [2022-03-20 18:32:27,137 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:32:27,137 INFO L499 BasicCegarLoop]: trace histogram [86, 86, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:32:27,138 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85 [2022-03-20 18:32:27,138 INFO L403 AbstractCegarLoop]: === Iteration 87 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:32:27,138 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:32:27,138 INFO L85 PathProgramCache]: Analyzing trace with hash -1663097500, now seen corresponding path program 86 times [2022-03-20 18:32:27,138 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:32:27,138 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1751830597] [2022-03-20 18:32:27,161 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 18:32:27,161 INFO L85 PathProgramCache]: Analyzing trace with hash -763541038, now seen corresponding path program 1 times [2022-03-20 18:32:27,161 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:32:27,161 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1966224416] [2022-03-20 18:32:27,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:32:27,162 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:32:27,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:32:27,175 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:32:27,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:32:27,177 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:32:27,178 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:32:27,178 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1966224416] [2022-03-20 18:32:27,178 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1966224416] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:32:27,178 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:32:27,178 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 18:32:30,233 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:32:30,233 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1751830597] [2022-03-20 18:32:30,233 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1751830597] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:32:30,233 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:32:30,233 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [90] imperfect sequences [] total 90 [2022-03-20 18:32:30,233 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [702626483] [2022-03-20 18:32:30,233 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:32:30,233 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 90 states [2022-03-20 18:32:30,233 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:32:30,234 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 90 interpolants. [2022-03-20 18:32:30,234 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=177, Invalid=7833, Unknown=0, NotChecked=0, Total=8010 [2022-03-20 18:32:30,234 INFO L87 Difference]: Start difference. First operand 184 states and 184 transitions. Second operand has 90 states, 90 states have (on average 1.988888888888889) internal successors, (179), 89 states have internal predecessors, (179), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:32:36,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:32:36,482 INFO L93 Difference]: Finished difference Result 192 states and 192 transitions. [2022-03-20 18:32:36,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2022-03-20 18:32:36,482 INFO L78 Accepts]: Start accepts. Automaton has has 90 states, 90 states have (on average 1.988888888888889) internal successors, (179), 89 states have internal predecessors, (179), 2 states have call successors, (3), 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 183 [2022-03-20 18:32:36,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:32:36,483 INFO L225 Difference]: With dead ends: 192 [2022-03-20 18:32:36,483 INFO L226 Difference]: Without dead ends: 187 [2022-03-20 18:32:36,484 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 271 GetRequests, 65 SyntacticMatches, 31 SemanticMatches, 175 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3741 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=525, Invalid=30627, Unknown=0, NotChecked=0, Total=31152 [2022-03-20 18:32:36,484 INFO L913 BasicCegarLoop]: 11 mSDtfsCounter, 95 mSDsluCounter, 437 mSDsCounter, 0 mSdLazyCounter, 15661 mSolverCounterSat, 89 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 95 SdHoareTripleChecker+Valid, 448 SdHoareTripleChecker+Invalid, 15750 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 89 IncrementalHoareTripleChecker+Valid, 15661 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.7s IncrementalHoareTripleChecker+Time [2022-03-20 18:32:36,484 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [95 Valid, 448 Invalid, 15750 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [89 Valid, 15661 Invalid, 0 Unknown, 0 Unchecked, 3.7s Time] [2022-03-20 18:32:36,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2022-03-20 18:32:36,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 186. [2022-03-20 18:32:36,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 186 states, 181 states have (on average 1.0055248618784531) internal successors, (182), 181 states have internal predecessors, (182), 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) [2022-03-20 18:32:36,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 186 transitions. [2022-03-20 18:32:36,530 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 186 transitions. Word has length 183 [2022-03-20 18:32:36,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:32:36,530 INFO L478 AbstractCegarLoop]: Abstraction has 186 states and 186 transitions. [2022-03-20 18:32:36,530 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 90 states, 90 states have (on average 1.988888888888889) internal successors, (179), 89 states have internal predecessors, (179), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:32:36,530 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 186 transitions. [2022-03-20 18:32:36,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2022-03-20 18:32:36,531 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:32:36,531 INFO L499 BasicCegarLoop]: trace histogram [87, 87, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:32:36,531 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86 [2022-03-20 18:32:36,531 INFO L403 AbstractCegarLoop]: === Iteration 88 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:32:36,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:32:36,531 INFO L85 PathProgramCache]: Analyzing trace with hash 593131970, now seen corresponding path program 87 times [2022-03-20 18:32:36,531 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:32:36,531 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [403896058] [2022-03-20 18:32:36,551 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 18:32:36,551 INFO L85 PathProgramCache]: Analyzing trace with hash -704435694, now seen corresponding path program 1 times [2022-03-20 18:32:36,551 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:32:36,551 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1059123914] [2022-03-20 18:32:36,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:32:36,551 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:32:36,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:32:36,563 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:32:36,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:32:36,565 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:32:36,565 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:32:36,565 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1059123914] [2022-03-20 18:32:36,565 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1059123914] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:32:36,565 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:32:36,565 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 18:32:39,811 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:32:39,811 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [403896058] [2022-03-20 18:32:39,812 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [403896058] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:32:39,812 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:32:39,812 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [91] imperfect sequences [] total 91 [2022-03-20 18:32:39,812 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [820270973] [2022-03-20 18:32:39,812 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:32:39,812 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 91 states [2022-03-20 18:32:39,812 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:32:39,812 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 91 interpolants. [2022-03-20 18:32:39,813 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=179, Invalid=8011, Unknown=0, NotChecked=0, Total=8190 [2022-03-20 18:32:39,813 INFO L87 Difference]: Start difference. First operand 186 states and 186 transitions. Second operand has 91 states, 91 states have (on average 1.989010989010989) internal successors, (181), 90 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) [2022-03-20 18:32:46,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:32:46,235 INFO L93 Difference]: Finished difference Result 194 states and 194 transitions. [2022-03-20 18:32:46,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2022-03-20 18:32:46,236 INFO L78 Accepts]: Start accepts. Automaton has has 91 states, 91 states have (on average 1.989010989010989) internal successors, (181), 90 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 [2022-03-20 18:32:46,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:32:46,236 INFO L225 Difference]: With dead ends: 194 [2022-03-20 18:32:46,236 INFO L226 Difference]: Without dead ends: 189 [2022-03-20 18:32:46,238 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 274 GetRequests, 52 SyntacticMatches, 45 SemanticMatches, 177 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3828 ImplicationChecksByTransitivity, 5.7s TimeCoverageRelationStatistics Valid=531, Invalid=31331, Unknown=0, NotChecked=0, Total=31862 [2022-03-20 18:32:46,238 INFO L913 BasicCegarLoop]: 11 mSDtfsCounter, 96 mSDsluCounter, 442 mSDsCounter, 0 mSdLazyCounter, 16017 mSolverCounterSat, 90 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 453 SdHoareTripleChecker+Invalid, 16107 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 90 IncrementalHoareTripleChecker+Valid, 16017 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.8s IncrementalHoareTripleChecker+Time [2022-03-20 18:32:46,238 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [96 Valid, 453 Invalid, 16107 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [90 Valid, 16017 Invalid, 0 Unknown, 0 Unchecked, 3.8s Time] [2022-03-20 18:32:46,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2022-03-20 18:32:46,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 188. [2022-03-20 18:32:46,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 188 states, 183 states have (on average 1.005464480874317) internal successors, (184), 183 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) [2022-03-20 18:32:46,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 188 transitions. [2022-03-20 18:32:46,289 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 188 transitions. Word has length 185 [2022-03-20 18:32:46,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:32:46,290 INFO L478 AbstractCegarLoop]: Abstraction has 188 states and 188 transitions. [2022-03-20 18:32:46,290 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 91 states, 91 states have (on average 1.989010989010989) internal successors, (181), 90 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) [2022-03-20 18:32:46,290 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 188 transitions. [2022-03-20 18:32:46,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 188 [2022-03-20 18:32:46,290 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:32:46,290 INFO L499 BasicCegarLoop]: trace histogram [88, 88, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:32:46,290 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87 [2022-03-20 18:32:46,291 INFO L403 AbstractCegarLoop]: === Iteration 89 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:32:46,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:32:46,291 INFO L85 PathProgramCache]: Analyzing trace with hash -128831840, now seen corresponding path program 88 times [2022-03-20 18:32:46,291 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:32:46,291 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [505488386] [2022-03-20 18:32:46,312 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 18:32:46,312 INFO L85 PathProgramCache]: Analyzing trace with hash -645330350, now seen corresponding path program 1 times [2022-03-20 18:32:46,312 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:32:46,312 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1705328491] [2022-03-20 18:32:46,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:32:46,312 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:32:46,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:32:46,323 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:32:46,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:32:46,325 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:32:46,325 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:32:46,325 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1705328491] [2022-03-20 18:32:46,325 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1705328491] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:32:46,325 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:32:46,325 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 18:32:49,444 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:32:49,444 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [505488386] [2022-03-20 18:32:49,444 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [505488386] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:32:49,444 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:32:49,444 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [92] imperfect sequences [] total 92 [2022-03-20 18:32:49,444 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [838845352] [2022-03-20 18:32:49,444 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:32:49,444 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 92 states [2022-03-20 18:32:49,444 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:32:49,445 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 92 interpolants. [2022-03-20 18:32:49,445 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=181, Invalid=8191, Unknown=0, NotChecked=0, Total=8372 [2022-03-20 18:32:49,445 INFO L87 Difference]: Start difference. First operand 188 states and 188 transitions. Second operand has 92 states, 92 states have (on average 1.9891304347826086) internal successors, (183), 91 states have internal predecessors, (183), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:32:56,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:32:56,015 INFO L93 Difference]: Finished difference Result 196 states and 196 transitions. [2022-03-20 18:32:56,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2022-03-20 18:32:56,016 INFO L78 Accepts]: Start accepts. Automaton has has 92 states, 92 states have (on average 1.9891304347826086) internal successors, (183), 91 states have internal predecessors, (183), 2 states have call successors, (3), 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 187 [2022-03-20 18:32:56,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:32:56,016 INFO L225 Difference]: With dead ends: 196 [2022-03-20 18:32:56,016 INFO L226 Difference]: Without dead ends: 191 [2022-03-20 18:32:56,017 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 277 GetRequests, 58 SyntacticMatches, 40 SemanticMatches, 179 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3916 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=537, Invalid=32043, Unknown=0, NotChecked=0, Total=32580 [2022-03-20 18:32:56,017 INFO L913 BasicCegarLoop]: 11 mSDtfsCounter, 97 mSDsluCounter, 447 mSDsCounter, 0 mSdLazyCounter, 16377 mSolverCounterSat, 91 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 97 SdHoareTripleChecker+Valid, 458 SdHoareTripleChecker+Invalid, 16468 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 91 IncrementalHoareTripleChecker+Valid, 16377 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.9s IncrementalHoareTripleChecker+Time [2022-03-20 18:32:56,018 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [97 Valid, 458 Invalid, 16468 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [91 Valid, 16377 Invalid, 0 Unknown, 0 Unchecked, 3.9s Time] [2022-03-20 18:32:56,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2022-03-20 18:32:56,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 190. [2022-03-20 18:32:56,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 190 states, 185 states have (on average 1.0054054054054054) internal successors, (186), 185 states have internal predecessors, (186), 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) [2022-03-20 18:32:56,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 190 transitions. [2022-03-20 18:32:56,065 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 190 transitions. Word has length 187 [2022-03-20 18:32:56,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:32:56,065 INFO L478 AbstractCegarLoop]: Abstraction has 190 states and 190 transitions. [2022-03-20 18:32:56,065 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 92 states, 92 states have (on average 1.9891304347826086) internal successors, (183), 91 states have internal predecessors, (183), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:32:56,065 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 190 transitions. [2022-03-20 18:32:56,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 190 [2022-03-20 18:32:56,066 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:32:56,066 INFO L499 BasicCegarLoop]: trace histogram [89, 89, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:32:56,066 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88 [2022-03-20 18:32:56,066 INFO L403 AbstractCegarLoop]: === Iteration 90 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:32:56,066 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:32:56,066 INFO L85 PathProgramCache]: Analyzing trace with hash 1848648702, now seen corresponding path program 89 times [2022-03-20 18:32:56,066 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:32:56,066 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1022945884] [2022-03-20 18:32:56,088 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 18:32:56,088 INFO L85 PathProgramCache]: Analyzing trace with hash -586225006, now seen corresponding path program 1 times [2022-03-20 18:32:56,088 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:32:56,088 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [182481720] [2022-03-20 18:32:56,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:32:56,088 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:32:56,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:32:56,103 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:32:56,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:32:56,105 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:32:56,105 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:32:56,105 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [182481720] [2022-03-20 18:32:56,105 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [182481720] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:32:56,105 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:32:56,106 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 18:32:59,458 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:32:59,458 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1022945884] [2022-03-20 18:32:59,458 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1022945884] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:32:59,458 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:32:59,458 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [93] imperfect sequences [] total 93 [2022-03-20 18:32:59,458 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [471260271] [2022-03-20 18:32:59,458 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:32:59,458 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 93 states [2022-03-20 18:32:59,459 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:32:59,459 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 93 interpolants. [2022-03-20 18:32:59,459 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=183, Invalid=8373, Unknown=0, NotChecked=0, Total=8556 [2022-03-20 18:32:59,459 INFO L87 Difference]: Start difference. First operand 190 states and 190 transitions. Second operand has 93 states, 93 states have (on average 1.989247311827957) internal successors, (185), 92 states have internal predecessors, (185), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:33:06,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:33:06,111 INFO L93 Difference]: Finished difference Result 198 states and 198 transitions. [2022-03-20 18:33:06,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2022-03-20 18:33:06,112 INFO L78 Accepts]: Start accepts. Automaton has has 93 states, 93 states have (on average 1.989247311827957) internal successors, (185), 92 states have internal predecessors, (185), 2 states have call successors, (3), 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 189 [2022-03-20 18:33:06,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:33:06,112 INFO L225 Difference]: With dead ends: 198 [2022-03-20 18:33:06,112 INFO L226 Difference]: Without dead ends: 193 [2022-03-20 18:33:06,114 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 280 GetRequests, 51 SyntacticMatches, 48 SemanticMatches, 181 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4005 ImplicationChecksByTransitivity, 5.9s TimeCoverageRelationStatistics Valid=543, Invalid=32763, Unknown=0, NotChecked=0, Total=33306 [2022-03-20 18:33:06,114 INFO L913 BasicCegarLoop]: 11 mSDtfsCounter, 98 mSDsluCounter, 452 mSDsCounter, 0 mSdLazyCounter, 16741 mSolverCounterSat, 92 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 98 SdHoareTripleChecker+Valid, 463 SdHoareTripleChecker+Invalid, 16833 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 92 IncrementalHoareTripleChecker+Valid, 16741 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.9s IncrementalHoareTripleChecker+Time [2022-03-20 18:33:06,114 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [98 Valid, 463 Invalid, 16833 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [92 Valid, 16741 Invalid, 0 Unknown, 0 Unchecked, 3.9s Time] [2022-03-20 18:33:06,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2022-03-20 18:33:06,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 192. [2022-03-20 18:33:06,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 192 states, 187 states have (on average 1.0053475935828877) internal successors, (188), 187 states have internal predecessors, (188), 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) [2022-03-20 18:33:06,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 192 transitions. [2022-03-20 18:33:06,175 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 192 transitions. Word has length 189 [2022-03-20 18:33:06,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:33:06,175 INFO L478 AbstractCegarLoop]: Abstraction has 192 states and 192 transitions. [2022-03-20 18:33:06,175 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 93 states, 93 states have (on average 1.989247311827957) internal successors, (185), 92 states have internal predecessors, (185), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:33:06,175 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 192 transitions. [2022-03-20 18:33:06,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 192 [2022-03-20 18:33:06,176 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:33:06,176 INFO L499 BasicCegarLoop]: trace histogram [90, 90, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:33:06,176 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89 [2022-03-20 18:33:06,176 INFO L403 AbstractCegarLoop]: === Iteration 91 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:33:06,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:33:06,176 INFO L85 PathProgramCache]: Analyzing trace with hash -463062564, now seen corresponding path program 90 times [2022-03-20 18:33:06,176 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:33:06,176 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1630117236] [2022-03-20 18:33:06,198 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 18:33:06,198 INFO L85 PathProgramCache]: Analyzing trace with hash -527119662, now seen corresponding path program 1 times [2022-03-20 18:33:06,198 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:33:06,198 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1569000732] [2022-03-20 18:33:06,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:33:06,198 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:33:06,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:33:06,210 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:33:06,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:33:06,211 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:33:06,211 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:33:06,212 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1569000732] [2022-03-20 18:33:06,212 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1569000732] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:33:06,212 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:33:06,212 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 18:33:09,651 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:33:09,651 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1630117236] [2022-03-20 18:33:09,651 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1630117236] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:33:09,651 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:33:09,651 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [94] imperfect sequences [] total 94 [2022-03-20 18:33:09,652 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2101910766] [2022-03-20 18:33:09,652 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:33:09,652 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 94 states [2022-03-20 18:33:09,652 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:33:09,652 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 94 interpolants. [2022-03-20 18:33:09,653 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=185, Invalid=8557, Unknown=0, NotChecked=0, Total=8742 [2022-03-20 18:33:09,653 INFO L87 Difference]: Start difference. First operand 192 states and 192 transitions. Second operand has 94 states, 94 states have (on average 1.9893617021276595) internal successors, (187), 93 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) [2022-03-20 18:33:16,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:33:16,421 INFO L93 Difference]: Finished difference Result 200 states and 200 transitions. [2022-03-20 18:33:16,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2022-03-20 18:33:16,422 INFO L78 Accepts]: Start accepts. Automaton has has 94 states, 94 states have (on average 1.9893617021276595) internal successors, (187), 93 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 [2022-03-20 18:33:16,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:33:16,422 INFO L225 Difference]: With dead ends: 200 [2022-03-20 18:33:16,422 INFO L226 Difference]: Without dead ends: 195 [2022-03-20 18:33:16,424 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 283 GetRequests, 57 SyntacticMatches, 43 SemanticMatches, 183 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4095 ImplicationChecksByTransitivity, 6.0s TimeCoverageRelationStatistics Valid=549, Invalid=33491, Unknown=0, NotChecked=0, Total=34040 [2022-03-20 18:33:16,424 INFO L913 BasicCegarLoop]: 11 mSDtfsCounter, 99 mSDsluCounter, 457 mSDsCounter, 0 mSdLazyCounter, 17109 mSolverCounterSat, 93 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 468 SdHoareTripleChecker+Invalid, 17202 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 93 IncrementalHoareTripleChecker+Valid, 17109 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.0s IncrementalHoareTripleChecker+Time [2022-03-20 18:33:16,424 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [99 Valid, 468 Invalid, 17202 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [93 Valid, 17109 Invalid, 0 Unknown, 0 Unchecked, 4.0s Time] [2022-03-20 18:33:16,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2022-03-20 18:33:16,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 194. [2022-03-20 18:33:16,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 194 states, 189 states have (on average 1.0052910052910053) internal successors, (190), 189 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) [2022-03-20 18:33:16,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 194 transitions. [2022-03-20 18:33:16,473 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 194 transitions. Word has length 191 [2022-03-20 18:33:16,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:33:16,473 INFO L478 AbstractCegarLoop]: Abstraction has 194 states and 194 transitions. [2022-03-20 18:33:16,473 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 94 states, 94 states have (on average 1.9893617021276595) internal successors, (187), 93 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) [2022-03-20 18:33:16,473 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 194 transitions. [2022-03-20 18:33:16,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 194 [2022-03-20 18:33:16,474 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:33:16,474 INFO L499 BasicCegarLoop]: trace histogram [91, 91, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:33:16,474 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90 [2022-03-20 18:33:16,474 INFO L403 AbstractCegarLoop]: === Iteration 92 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:33:16,474 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:33:16,474 INFO L85 PathProgramCache]: Analyzing trace with hash -1519497158, now seen corresponding path program 91 times [2022-03-20 18:33:16,474 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:33:16,475 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1362609739] [2022-03-20 18:33:16,498 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 18:33:16,498 INFO L85 PathProgramCache]: Analyzing trace with hash -468014318, now seen corresponding path program 1 times [2022-03-20 18:33:16,498 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:33:16,498 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1684789919] [2022-03-20 18:33:16,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:33:16,498 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:33:16,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:33:16,509 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:33:16,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:33:16,511 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:33:16,511 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:33:16,511 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1684789919] [2022-03-20 18:33:16,511 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1684789919] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:33:16,511 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:33:16,511 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 18:33:20,112 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:33:20,113 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1362609739] [2022-03-20 18:33:20,113 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1362609739] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:33:20,113 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:33:20,113 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [95] imperfect sequences [] total 95 [2022-03-20 18:33:20,113 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1247943023] [2022-03-20 18:33:20,113 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:33:20,113 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 95 states [2022-03-20 18:33:20,113 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:33:20,113 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 95 interpolants. [2022-03-20 18:33:20,114 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=187, Invalid=8743, Unknown=0, NotChecked=0, Total=8930 [2022-03-20 18:33:20,114 INFO L87 Difference]: Start difference. First operand 194 states and 194 transitions. Second operand has 95 states, 95 states have (on average 1.9894736842105263) internal successors, (189), 94 states have internal predecessors, (189), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:33:27,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:33:27,025 INFO L93 Difference]: Finished difference Result 202 states and 202 transitions. [2022-03-20 18:33:27,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2022-03-20 18:33:27,025 INFO L78 Accepts]: Start accepts. Automaton has has 95 states, 95 states have (on average 1.9894736842105263) internal successors, (189), 94 states have internal predecessors, (189), 2 states have call successors, (3), 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 193 [2022-03-20 18:33:27,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:33:27,025 INFO L225 Difference]: With dead ends: 202 [2022-03-20 18:33:27,026 INFO L226 Difference]: Without dead ends: 197 [2022-03-20 18:33:27,027 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 286 GetRequests, 52 SyntacticMatches, 49 SemanticMatches, 185 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4186 ImplicationChecksByTransitivity, 6.2s TimeCoverageRelationStatistics Valid=555, Invalid=34227, Unknown=0, NotChecked=0, Total=34782 [2022-03-20 18:33:27,027 INFO L913 BasicCegarLoop]: 11 mSDtfsCounter, 100 mSDsluCounter, 462 mSDsCounter, 0 mSdLazyCounter, 17481 mSolverCounterSat, 94 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 100 SdHoareTripleChecker+Valid, 473 SdHoareTripleChecker+Invalid, 17575 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 94 IncrementalHoareTripleChecker+Valid, 17481 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.1s IncrementalHoareTripleChecker+Time [2022-03-20 18:33:27,027 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [100 Valid, 473 Invalid, 17575 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [94 Valid, 17481 Invalid, 0 Unknown, 0 Unchecked, 4.1s Time] [2022-03-20 18:33:27,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2022-03-20 18:33:27,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 196. [2022-03-20 18:33:27,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 196 states, 191 states have (on average 1.0052356020942408) internal successors, (192), 191 states have internal predecessors, (192), 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) [2022-03-20 18:33:27,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 196 transitions. [2022-03-20 18:33:27,078 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 196 transitions. Word has length 193 [2022-03-20 18:33:27,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:33:27,078 INFO L478 AbstractCegarLoop]: Abstraction has 196 states and 196 transitions. [2022-03-20 18:33:27,078 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 95 states, 95 states have (on average 1.9894736842105263) internal successors, (189), 94 states have internal predecessors, (189), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:33:27,078 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 196 transitions. [2022-03-20 18:33:27,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2022-03-20 18:33:27,078 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:33:27,079 INFO L499 BasicCegarLoop]: trace histogram [92, 92, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:33:27,079 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91 [2022-03-20 18:33:27,079 INFO L403 AbstractCegarLoop]: === Iteration 93 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:33:27,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:33:27,079 INFO L85 PathProgramCache]: Analyzing trace with hash 1154107160, now seen corresponding path program 92 times [2022-03-20 18:33:27,079 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:33:27,079 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1089061560] [2022-03-20 18:33:27,101 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 18:33:27,101 INFO L85 PathProgramCache]: Analyzing trace with hash -408908974, now seen corresponding path program 1 times [2022-03-20 18:33:27,101 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:33:27,101 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [787837668] [2022-03-20 18:33:27,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:33:27,101 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:33:27,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:33:27,118 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:33:27,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:33:27,120 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:33:27,120 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:33:27,120 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [787837668] [2022-03-20 18:33:27,120 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [787837668] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:33:27,120 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:33:27,120 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 18:33:30,776 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:33:30,776 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1089061560] [2022-03-20 18:33:30,776 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1089061560] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:33:30,777 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:33:30,777 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [96] imperfect sequences [] total 96 [2022-03-20 18:33:30,777 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [161076631] [2022-03-20 18:33:30,777 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:33:30,777 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 96 states [2022-03-20 18:33:30,777 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:33:30,777 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 96 interpolants. [2022-03-20 18:33:30,778 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=189, Invalid=8931, Unknown=0, NotChecked=0, Total=9120 [2022-03-20 18:33:30,791 INFO L87 Difference]: Start difference. First operand 196 states and 196 transitions. Second operand has 96 states, 96 states have (on average 1.9895833333333333) internal successors, (191), 95 states have internal predecessors, (191), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:33:37,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:33:37,878 INFO L93 Difference]: Finished difference Result 204 states and 204 transitions. [2022-03-20 18:33:37,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2022-03-20 18:33:37,878 INFO L78 Accepts]: Start accepts. Automaton has has 96 states, 96 states have (on average 1.9895833333333333) internal successors, (191), 95 states have internal predecessors, (191), 2 states have call successors, (3), 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 195 [2022-03-20 18:33:37,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:33:37,879 INFO L225 Difference]: With dead ends: 204 [2022-03-20 18:33:37,879 INFO L226 Difference]: Without dead ends: 199 [2022-03-20 18:33:37,881 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 289 GetRequests, 50 SyntacticMatches, 52 SemanticMatches, 187 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4278 ImplicationChecksByTransitivity, 6.4s TimeCoverageRelationStatistics Valid=561, Invalid=34971, Unknown=0, NotChecked=0, Total=35532 [2022-03-20 18:33:37,881 INFO L913 BasicCegarLoop]: 11 mSDtfsCounter, 101 mSDsluCounter, 467 mSDsCounter, 0 mSdLazyCounter, 17857 mSolverCounterSat, 95 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 478 SdHoareTripleChecker+Invalid, 17952 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 95 IncrementalHoareTripleChecker+Valid, 17857 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.2s IncrementalHoareTripleChecker+Time [2022-03-20 18:33:37,881 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [101 Valid, 478 Invalid, 17952 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [95 Valid, 17857 Invalid, 0 Unknown, 0 Unchecked, 4.2s Time] [2022-03-20 18:33:37,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2022-03-20 18:33:37,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 198. [2022-03-20 18:33:37,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 198 states, 193 states have (on average 1.005181347150259) internal successors, (194), 193 states have internal predecessors, (194), 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) [2022-03-20 18:33:37,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 198 transitions. [2022-03-20 18:33:37,937 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 198 transitions. Word has length 195 [2022-03-20 18:33:37,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:33:37,937 INFO L478 AbstractCegarLoop]: Abstraction has 198 states and 198 transitions. [2022-03-20 18:33:37,937 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 96 states, 96 states have (on average 1.9895833333333333) internal successors, (191), 95 states have internal predecessors, (191), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:33:37,937 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 198 transitions. [2022-03-20 18:33:37,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 198 [2022-03-20 18:33:37,938 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:33:37,938 INFO L499 BasicCegarLoop]: trace histogram [93, 93, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:33:37,938 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92 [2022-03-20 18:33:37,938 INFO L403 AbstractCegarLoop]: === Iteration 94 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:33:37,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:33:37,938 INFO L85 PathProgramCache]: Analyzing trace with hash 2097413750, now seen corresponding path program 93 times [2022-03-20 18:33:37,938 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:33:37,938 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [989893176] [2022-03-20 18:33:37,965 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 18:33:37,965 INFO L85 PathProgramCache]: Analyzing trace with hash -349803630, now seen corresponding path program 1 times [2022-03-20 18:33:37,965 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:33:37,965 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1766647088] [2022-03-20 18:33:37,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:33:37,965 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:33:37,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:33:37,982 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:33:37,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:33:37,983 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:33:37,983 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:33:37,983 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1766647088] [2022-03-20 18:33:37,983 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1766647088] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:33:37,983 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:33:37,983 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 18:33:41,661 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:33:41,662 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [989893176] [2022-03-20 18:33:41,662 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [989893176] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:33:41,662 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:33:41,662 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [97] imperfect sequences [] total 97 [2022-03-20 18:33:41,662 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1714192560] [2022-03-20 18:33:41,662 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:33:41,662 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 97 states [2022-03-20 18:33:41,662 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:33:41,662 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 97 interpolants. [2022-03-20 18:33:41,663 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=191, Invalid=9121, Unknown=0, NotChecked=0, Total=9312 [2022-03-20 18:33:41,663 INFO L87 Difference]: Start difference. First operand 198 states and 198 transitions. Second operand has 97 states, 97 states have (on average 1.9896907216494846) internal successors, (193), 96 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) [2022-03-20 18:33:48,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:33:48,904 INFO L93 Difference]: Finished difference Result 206 states and 206 transitions. [2022-03-20 18:33:48,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2022-03-20 18:33:48,905 INFO L78 Accepts]: Start accepts. Automaton has has 97 states, 97 states have (on average 1.9896907216494846) internal successors, (193), 96 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 [2022-03-20 18:33:48,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:33:48,905 INFO L225 Difference]: With dead ends: 206 [2022-03-20 18:33:48,905 INFO L226 Difference]: Without dead ends: 201 [2022-03-20 18:33:48,907 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 292 GetRequests, 55 SyntacticMatches, 48 SemanticMatches, 189 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4371 ImplicationChecksByTransitivity, 6.4s TimeCoverageRelationStatistics Valid=567, Invalid=35723, Unknown=0, NotChecked=0, Total=36290 [2022-03-20 18:33:48,907 INFO L913 BasicCegarLoop]: 11 mSDtfsCounter, 102 mSDsluCounter, 472 mSDsCounter, 0 mSdLazyCounter, 18237 mSolverCounterSat, 96 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 483 SdHoareTripleChecker+Invalid, 18333 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 96 IncrementalHoareTripleChecker+Valid, 18237 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.3s IncrementalHoareTripleChecker+Time [2022-03-20 18:33:48,907 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [102 Valid, 483 Invalid, 18333 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [96 Valid, 18237 Invalid, 0 Unknown, 0 Unchecked, 4.3s Time] [2022-03-20 18:33:48,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2022-03-20 18:33:48,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 200. [2022-03-20 18:33:48,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 200 states, 195 states have (on average 1.005128205128205) internal successors, (196), 195 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) [2022-03-20 18:33:48,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 200 transitions. [2022-03-20 18:33:48,965 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 200 transitions. Word has length 197 [2022-03-20 18:33:48,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:33:48,965 INFO L478 AbstractCegarLoop]: Abstraction has 200 states and 200 transitions. [2022-03-20 18:33:48,965 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 97 states, 97 states have (on average 1.9896907216494846) internal successors, (193), 96 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) [2022-03-20 18:33:48,965 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 200 transitions. [2022-03-20 18:33:48,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 200 [2022-03-20 18:33:48,966 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:33:48,966 INFO L499 BasicCegarLoop]: trace histogram [94, 94, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:33:48,966 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93 [2022-03-20 18:33:48,966 INFO L403 AbstractCegarLoop]: === Iteration 95 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:33:48,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:33:48,966 INFO L85 PathProgramCache]: Analyzing trace with hash -1918020012, now seen corresponding path program 94 times [2022-03-20 18:33:48,966 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:33:48,966 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1082588057] [2022-03-20 18:33:48,989 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 18:33:48,989 INFO L85 PathProgramCache]: Analyzing trace with hash -290698286, now seen corresponding path program 1 times [2022-03-20 18:33:48,989 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:33:48,989 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [622433460] [2022-03-20 18:33:48,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:33:48,989 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:33:48,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:33:49,015 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:33:49,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:33:49,017 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:33:49,017 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:33:49,017 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [622433460] [2022-03-20 18:33:49,017 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [622433460] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:33:49,017 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:33:49,017 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 18:33:52,806 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:33:52,806 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1082588057] [2022-03-20 18:33:52,807 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1082588057] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:33:52,807 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:33:52,807 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [98] imperfect sequences [] total 98 [2022-03-20 18:33:52,807 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1372936597] [2022-03-20 18:33:52,807 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:33:52,807 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 98 states [2022-03-20 18:33:52,807 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:33:52,807 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 98 interpolants. [2022-03-20 18:33:52,807 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=193, Invalid=9313, Unknown=0, NotChecked=0, Total=9506 [2022-03-20 18:33:52,808 INFO L87 Difference]: Start difference. First operand 200 states and 200 transitions. Second operand has 98 states, 98 states have (on average 1.989795918367347) internal successors, (195), 97 states have internal predecessors, (195), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:34:00,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:34:00,261 INFO L93 Difference]: Finished difference Result 208 states and 208 transitions. [2022-03-20 18:34:00,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2022-03-20 18:34:00,261 INFO L78 Accepts]: Start accepts. Automaton has has 98 states, 98 states have (on average 1.989795918367347) internal successors, (195), 97 states have internal predecessors, (195), 2 states have call successors, (3), 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 199 [2022-03-20 18:34:00,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:34:00,262 INFO L225 Difference]: With dead ends: 208 [2022-03-20 18:34:00,262 INFO L226 Difference]: Without dead ends: 203 [2022-03-20 18:34:00,263 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 295 GetRequests, 59 SyntacticMatches, 45 SemanticMatches, 191 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4465 ImplicationChecksByTransitivity, 6.6s TimeCoverageRelationStatistics Valid=573, Invalid=36483, Unknown=0, NotChecked=0, Total=37056 [2022-03-20 18:34:00,263 INFO L913 BasicCegarLoop]: 11 mSDtfsCounter, 103 mSDsluCounter, 477 mSDsCounter, 0 mSdLazyCounter, 18621 mSolverCounterSat, 97 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 103 SdHoareTripleChecker+Valid, 488 SdHoareTripleChecker+Invalid, 18718 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 97 IncrementalHoareTripleChecker+Valid, 18621 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.4s IncrementalHoareTripleChecker+Time [2022-03-20 18:34:00,263 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [103 Valid, 488 Invalid, 18718 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [97 Valid, 18621 Invalid, 0 Unknown, 0 Unchecked, 4.4s Time] [2022-03-20 18:34:00,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2022-03-20 18:34:00,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 202. [2022-03-20 18:34:00,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 202 states, 197 states have (on average 1.0050761421319796) internal successors, (198), 197 states have internal predecessors, (198), 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) [2022-03-20 18:34:00,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 202 transitions. [2022-03-20 18:34:00,317 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 202 transitions. Word has length 199 [2022-03-20 18:34:00,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:34:00,317 INFO L478 AbstractCegarLoop]: Abstraction has 202 states and 202 transitions. [2022-03-20 18:34:00,317 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 98 states, 98 states have (on average 1.989795918367347) internal successors, (195), 97 states have internal predecessors, (195), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:34:00,317 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 202 transitions. [2022-03-20 18:34:00,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 202 [2022-03-20 18:34:00,318 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:34:00,318 INFO L499 BasicCegarLoop]: trace histogram [95, 95, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:34:00,318 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94 [2022-03-20 18:34:00,318 INFO L403 AbstractCegarLoop]: === Iteration 96 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:34:00,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:34:00,318 INFO L85 PathProgramCache]: Analyzing trace with hash 425733810, now seen corresponding path program 95 times [2022-03-20 18:34:00,318 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:34:00,318 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1880837698] [2022-03-20 18:34:00,338 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 18:34:00,339 INFO L85 PathProgramCache]: Analyzing trace with hash -231592942, now seen corresponding path program 1 times [2022-03-20 18:34:00,339 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:34:00,339 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [507804968] [2022-03-20 18:34:00,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:34:00,339 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:34:00,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:34:00,354 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:34:00,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:34:00,356 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:34:00,356 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:34:00,356 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [507804968] [2022-03-20 18:34:00,356 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [507804968] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:34:00,356 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:34:00,356 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 18:34:04,174 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:34:04,175 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1880837698] [2022-03-20 18:34:04,175 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1880837698] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:34:04,175 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:34:04,175 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [99] imperfect sequences [] total 99 [2022-03-20 18:34:04,175 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [355947840] [2022-03-20 18:34:04,175 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:34:04,175 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 99 states [2022-03-20 18:34:04,175 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:34:04,175 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 99 interpolants. [2022-03-20 18:34:04,176 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=195, Invalid=9507, Unknown=0, NotChecked=0, Total=9702 [2022-03-20 18:34:04,176 INFO L87 Difference]: Start difference. First operand 202 states and 202 transitions. Second operand has 99 states, 99 states have (on average 1.9898989898989898) internal successors, (197), 98 states have internal predecessors, (197), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:34:11,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:34:11,690 INFO L93 Difference]: Finished difference Result 210 states and 210 transitions. [2022-03-20 18:34:11,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2022-03-20 18:34:11,691 INFO L78 Accepts]: Start accepts. Automaton has has 99 states, 99 states have (on average 1.9898989898989898) internal successors, (197), 98 states have internal predecessors, (197), 2 states have call successors, (3), 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 201 [2022-03-20 18:34:11,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:34:11,691 INFO L225 Difference]: With dead ends: 210 [2022-03-20 18:34:11,691 INFO L226 Difference]: Without dead ends: 205 [2022-03-20 18:34:11,693 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 298 GetRequests, 60 SyntacticMatches, 45 SemanticMatches, 193 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4560 ImplicationChecksByTransitivity, 6.7s TimeCoverageRelationStatistics Valid=579, Invalid=37251, Unknown=0, NotChecked=0, Total=37830 [2022-03-20 18:34:11,693 INFO L913 BasicCegarLoop]: 11 mSDtfsCounter, 104 mSDsluCounter, 482 mSDsCounter, 0 mSdLazyCounter, 19009 mSolverCounterSat, 98 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 104 SdHoareTripleChecker+Valid, 493 SdHoareTripleChecker+Invalid, 19107 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 98 IncrementalHoareTripleChecker+Valid, 19009 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.5s IncrementalHoareTripleChecker+Time [2022-03-20 18:34:11,693 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [104 Valid, 493 Invalid, 19107 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [98 Valid, 19009 Invalid, 0 Unknown, 0 Unchecked, 4.5s Time] [2022-03-20 18:34:11,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2022-03-20 18:34:11,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 204. [2022-03-20 18:34:11,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 204 states, 199 states have (on average 1.0050251256281406) internal successors, (200), 199 states have internal predecessors, (200), 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) [2022-03-20 18:34:11,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 204 transitions. [2022-03-20 18:34:11,752 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 204 transitions. Word has length 201 [2022-03-20 18:34:11,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:34:11,752 INFO L478 AbstractCegarLoop]: Abstraction has 204 states and 204 transitions. [2022-03-20 18:34:11,753 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 99 states, 99 states have (on average 1.9898989898989898) internal successors, (197), 98 states have internal predecessors, (197), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:34:11,753 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 204 transitions. [2022-03-20 18:34:11,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 204 [2022-03-20 18:34:11,753 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:34:11,753 INFO L499 BasicCegarLoop]: trace histogram [96, 96, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:34:11,753 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95 [2022-03-20 18:34:11,753 INFO L403 AbstractCegarLoop]: === Iteration 97 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:34:11,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:34:11,754 INFO L85 PathProgramCache]: Analyzing trace with hash -2084673648, now seen corresponding path program 96 times [2022-03-20 18:34:11,754 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:34:11,754 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [148749624] [2022-03-20 18:34:11,779 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 18:34:11,779 INFO L85 PathProgramCache]: Analyzing trace with hash -172487598, now seen corresponding path program 1 times [2022-03-20 18:34:11,779 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:34:11,780 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1023892979] [2022-03-20 18:34:11,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:34:11,780 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:34:11,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:34:11,798 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:34:11,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:34:11,799 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:34:11,799 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:34:11,799 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1023892979] [2022-03-20 18:34:11,800 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1023892979] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:34:11,800 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:34:11,800 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 18:34:15,600 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:34:15,600 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [148749624] [2022-03-20 18:34:15,600 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [148749624] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:34:15,600 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:34:15,600 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [100] imperfect sequences [] total 100 [2022-03-20 18:34:15,600 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [228476317] [2022-03-20 18:34:15,600 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:34:15,600 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 100 states [2022-03-20 18:34:15,600 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:34:15,601 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 100 interpolants. [2022-03-20 18:34:15,601 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=197, Invalid=9703, Unknown=0, NotChecked=0, Total=9900 [2022-03-20 18:34:15,602 INFO L87 Difference]: Start difference. First operand 204 states and 204 transitions. Second operand has 100 states, 100 states have (on average 1.99) internal successors, (199), 99 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) [2022-03-20 18:34:23,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:34:23,306 INFO L93 Difference]: Finished difference Result 212 states and 212 transitions. [2022-03-20 18:34:23,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2022-03-20 18:34:23,307 INFO L78 Accepts]: Start accepts. Automaton has has 100 states, 100 states have (on average 1.99) internal successors, (199), 99 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 [2022-03-20 18:34:23,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:34:23,307 INFO L225 Difference]: With dead ends: 212 [2022-03-20 18:34:23,308 INFO L226 Difference]: Without dead ends: 207 [2022-03-20 18:34:23,309 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 301 GetRequests, 61 SyntacticMatches, 45 SemanticMatches, 195 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4656 ImplicationChecksByTransitivity, 6.7s TimeCoverageRelationStatistics Valid=585, Invalid=38027, Unknown=0, NotChecked=0, Total=38612 [2022-03-20 18:34:23,309 INFO L913 BasicCegarLoop]: 11 mSDtfsCounter, 105 mSDsluCounter, 487 mSDsCounter, 0 mSdLazyCounter, 19401 mSolverCounterSat, 99 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 498 SdHoareTripleChecker+Invalid, 19500 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 99 IncrementalHoareTripleChecker+Valid, 19401 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.6s IncrementalHoareTripleChecker+Time [2022-03-20 18:34:23,309 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [105 Valid, 498 Invalid, 19500 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [99 Valid, 19401 Invalid, 0 Unknown, 0 Unchecked, 4.6s Time] [2022-03-20 18:34:23,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2022-03-20 18:34:23,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 206. [2022-03-20 18:34:23,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 206 states, 201 states have (on average 1.0049751243781095) internal successors, (202), 201 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) [2022-03-20 18:34:23,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206 states to 206 states and 206 transitions. [2022-03-20 18:34:23,364 INFO L78 Accepts]: Start accepts. Automaton has 206 states and 206 transitions. Word has length 203 [2022-03-20 18:34:23,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:34:23,364 INFO L478 AbstractCegarLoop]: Abstraction has 206 states and 206 transitions. [2022-03-20 18:34:23,364 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 100 states, 100 states have (on average 1.99) internal successors, (199), 99 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) [2022-03-20 18:34:23,364 INFO L276 IsEmpty]: Start isEmpty. Operand 206 states and 206 transitions. [2022-03-20 18:34:23,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 206 [2022-03-20 18:34:23,365 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:34:23,365 INFO L499 BasicCegarLoop]: trace histogram [97, 97, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:34:23,365 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96 [2022-03-20 18:34:23,365 INFO L403 AbstractCegarLoop]: === Iteration 98 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:34:23,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:34:23,365 INFO L85 PathProgramCache]: Analyzing trace with hash -814620434, now seen corresponding path program 97 times [2022-03-20 18:34:23,365 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:34:23,365 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1424913941] [2022-03-20 18:34:23,389 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 18:34:23,389 INFO L85 PathProgramCache]: Analyzing trace with hash -113382254, now seen corresponding path program 1 times [2022-03-20 18:34:23,389 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:34:23,389 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1312227269] [2022-03-20 18:34:23,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:34:23,389 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:34:23,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:34:23,460 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:34:23,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:34:23,462 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:34:23,462 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:34:23,462 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1312227269] [2022-03-20 18:34:23,462 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1312227269] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:34:23,462 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:34:23,462 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 18:34:27,239 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:34:27,239 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1424913941] [2022-03-20 18:34:27,239 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1424913941] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:34:27,239 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:34:27,239 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [101] imperfect sequences [] total 101 [2022-03-20 18:34:27,239 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [7691806] [2022-03-20 18:34:27,239 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:34:27,240 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 101 states [2022-03-20 18:34:27,240 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:34:27,240 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 101 interpolants. [2022-03-20 18:34:27,240 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=199, Invalid=9901, Unknown=0, NotChecked=0, Total=10100 [2022-03-20 18:34:27,241 INFO L87 Difference]: Start difference. First operand 206 states and 206 transitions. Second operand has 101 states, 101 states have (on average 1.99009900990099) internal successors, (201), 100 states have internal predecessors, (201), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:34:35,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:34:35,039 INFO L93 Difference]: Finished difference Result 214 states and 214 transitions. [2022-03-20 18:34:35,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 101 states. [2022-03-20 18:34:35,039 INFO L78 Accepts]: Start accepts. Automaton has has 101 states, 101 states have (on average 1.99009900990099) internal successors, (201), 100 states have internal predecessors, (201), 2 states have call successors, (3), 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 205 [2022-03-20 18:34:35,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:34:35,040 INFO L225 Difference]: With dead ends: 214 [2022-03-20 18:34:35,040 INFO L226 Difference]: Without dead ends: 209 [2022-03-20 18:34:35,041 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 304 GetRequests, 66 SyntacticMatches, 41 SemanticMatches, 197 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4753 ImplicationChecksByTransitivity, 6.8s TimeCoverageRelationStatistics Valid=591, Invalid=38811, Unknown=0, NotChecked=0, Total=39402 [2022-03-20 18:34:35,042 INFO L913 BasicCegarLoop]: 11 mSDtfsCounter, 106 mSDsluCounter, 492 mSDsCounter, 0 mSdLazyCounter, 19797 mSolverCounterSat, 100 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 106 SdHoareTripleChecker+Valid, 503 SdHoareTripleChecker+Invalid, 19897 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 100 IncrementalHoareTripleChecker+Valid, 19797 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.6s IncrementalHoareTripleChecker+Time [2022-03-20 18:34:35,042 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [106 Valid, 503 Invalid, 19897 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [100 Valid, 19797 Invalid, 0 Unknown, 0 Unchecked, 4.6s Time] [2022-03-20 18:34:35,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2022-03-20 18:34:35,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 208. [2022-03-20 18:34:35,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 208 states, 203 states have (on average 1.0049261083743843) internal successors, (204), 203 states have internal predecessors, (204), 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) [2022-03-20 18:34:35,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 208 transitions. [2022-03-20 18:34:35,104 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 208 transitions. Word has length 205 [2022-03-20 18:34:35,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:34:35,104 INFO L478 AbstractCegarLoop]: Abstraction has 208 states and 208 transitions. [2022-03-20 18:34:35,104 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 101 states, 101 states have (on average 1.99009900990099) internal successors, (201), 100 states have internal predecessors, (201), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:34:35,104 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 208 transitions. [2022-03-20 18:34:35,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 208 [2022-03-20 18:34:35,105 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:34:35,105 INFO L499 BasicCegarLoop]: trace histogram [98, 98, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:34:35,105 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97 [2022-03-20 18:34:35,105 INFO L403 AbstractCegarLoop]: === Iteration 99 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:34:35,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:34:35,105 INFO L85 PathProgramCache]: Analyzing trace with hash -64193844, now seen corresponding path program 98 times [2022-03-20 18:34:35,105 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:34:35,105 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [840579513] [2022-03-20 18:34:35,127 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 18:34:35,127 INFO L85 PathProgramCache]: Analyzing trace with hash -54276910, now seen corresponding path program 1 times [2022-03-20 18:34:35,127 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:34:35,127 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [179786215] [2022-03-20 18:34:35,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:34:35,127 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:34:35,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:34:35,150 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:34:35,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:34:35,152 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:34:35,152 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:34:35,152 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [179786215] [2022-03-20 18:34:35,152 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [179786215] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:34:35,152 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:34:35,152 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 18:34:39,281 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:34:39,281 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [840579513] [2022-03-20 18:34:39,281 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [840579513] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:34:39,281 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:34:39,281 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [102] imperfect sequences [] total 102 [2022-03-20 18:34:39,281 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1583060877] [2022-03-20 18:34:39,281 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:34:39,281 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 102 states [2022-03-20 18:34:39,281 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:34:39,282 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 102 interpolants. [2022-03-20 18:34:39,282 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=201, Invalid=10101, Unknown=0, NotChecked=0, Total=10302 [2022-03-20 18:34:39,282 INFO L87 Difference]: Start difference. First operand 208 states and 208 transitions. Second operand has 102 states, 102 states have (on average 1.9901960784313726) internal successors, (203), 101 states have internal predecessors, (203), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:34:47,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:34:47,269 INFO L93 Difference]: Finished difference Result 216 states and 216 transitions. [2022-03-20 18:34:47,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 102 states. [2022-03-20 18:34:47,269 INFO L78 Accepts]: Start accepts. Automaton has has 102 states, 102 states have (on average 1.9901960784313726) internal successors, (203), 101 states have internal predecessors, (203), 2 states have call successors, (3), 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 207 [2022-03-20 18:34:47,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:34:47,270 INFO L225 Difference]: With dead ends: 216 [2022-03-20 18:34:47,270 INFO L226 Difference]: Without dead ends: 211 [2022-03-20 18:34:47,272 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 307 GetRequests, 60 SyntacticMatches, 48 SemanticMatches, 199 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4851 ImplicationChecksByTransitivity, 7.1s TimeCoverageRelationStatistics Valid=597, Invalid=39603, Unknown=0, NotChecked=0, Total=40200 [2022-03-20 18:34:47,272 INFO L913 BasicCegarLoop]: 11 mSDtfsCounter, 107 mSDsluCounter, 497 mSDsCounter, 0 mSdLazyCounter, 20197 mSolverCounterSat, 101 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 107 SdHoareTripleChecker+Valid, 508 SdHoareTripleChecker+Invalid, 20298 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 101 IncrementalHoareTripleChecker+Valid, 20197 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.7s IncrementalHoareTripleChecker+Time [2022-03-20 18:34:47,272 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [107 Valid, 508 Invalid, 20298 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [101 Valid, 20197 Invalid, 0 Unknown, 0 Unchecked, 4.7s Time] [2022-03-20 18:34:47,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2022-03-20 18:34:47,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 210. [2022-03-20 18:34:47,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 210 states, 205 states have (on average 1.0048780487804878) internal successors, (206), 205 states have internal predecessors, (206), 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) [2022-03-20 18:34:47,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 210 transitions. [2022-03-20 18:34:47,336 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 210 transitions. Word has length 207 [2022-03-20 18:34:47,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:34:47,336 INFO L478 AbstractCegarLoop]: Abstraction has 210 states and 210 transitions. [2022-03-20 18:34:47,336 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 102 states, 102 states have (on average 1.9901960784313726) internal successors, (203), 101 states have internal predecessors, (203), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:34:47,336 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 210 transitions. [2022-03-20 18:34:47,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 210 [2022-03-20 18:34:47,337 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:34:47,337 INFO L499 BasicCegarLoop]: trace histogram [99, 99, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:34:47,337 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98 [2022-03-20 18:34:47,337 INFO L403 AbstractCegarLoop]: === Iteration 100 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:34:47,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:34:47,337 INFO L85 PathProgramCache]: Analyzing trace with hash -458746582, now seen corresponding path program 99 times [2022-03-20 18:34:47,337 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:34:47,337 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [661954702] [2022-03-20 18:34:47,361 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 18:34:47,361 INFO L85 PathProgramCache]: Analyzing trace with hash 4828434, now seen corresponding path program 1 times [2022-03-20 18:34:47,361 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:34:47,361 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1476729374] [2022-03-20 18:34:47,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:34:47,361 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:34:47,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:34:47,375 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:34:47,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:34:47,387 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:34:47,388 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:34:47,388 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1476729374] [2022-03-20 18:34:47,388 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1476729374] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:34:47,388 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:34:47,388 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 18:34:51,360 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:34:51,361 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [661954702] [2022-03-20 18:34:51,361 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [661954702] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:34:51,361 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:34:51,361 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [103] imperfect sequences [] total 103 [2022-03-20 18:34:51,361 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1412906569] [2022-03-20 18:34:51,361 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:34:51,361 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 103 states [2022-03-20 18:34:51,361 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:34:51,361 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 103 interpolants. [2022-03-20 18:34:51,362 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=203, Invalid=10303, Unknown=0, NotChecked=0, Total=10506 [2022-03-20 18:34:51,362 INFO L87 Difference]: Start difference. First operand 210 states and 210 transitions. Second operand has 103 states, 103 states have (on average 1.9902912621359223) internal successors, (205), 102 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) [2022-03-20 18:34:59,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:34:59,521 INFO L93 Difference]: Finished difference Result 218 states and 218 transitions. [2022-03-20 18:34:59,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 103 states. [2022-03-20 18:34:59,525 INFO L78 Accepts]: Start accepts. Automaton has has 103 states, 103 states have (on average 1.9902912621359223) internal successors, (205), 102 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 [2022-03-20 18:34:59,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:34:59,526 INFO L225 Difference]: With dead ends: 218 [2022-03-20 18:34:59,526 INFO L226 Difference]: Without dead ends: 213 [2022-03-20 18:34:59,528 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 310 GetRequests, 64 SyntacticMatches, 45 SemanticMatches, 201 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4950 ImplicationChecksByTransitivity, 7.0s TimeCoverageRelationStatistics Valid=603, Invalid=40403, Unknown=0, NotChecked=0, Total=41006 [2022-03-20 18:34:59,528 INFO L913 BasicCegarLoop]: 11 mSDtfsCounter, 108 mSDsluCounter, 502 mSDsCounter, 0 mSdLazyCounter, 20601 mSolverCounterSat, 102 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 513 SdHoareTripleChecker+Invalid, 20703 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 102 IncrementalHoareTripleChecker+Valid, 20601 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.8s IncrementalHoareTripleChecker+Time [2022-03-20 18:34:59,528 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [108 Valid, 513 Invalid, 20703 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [102 Valid, 20601 Invalid, 0 Unknown, 0 Unchecked, 4.8s Time] [2022-03-20 18:34:59,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2022-03-20 18:34:59,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 212. [2022-03-20 18:34:59,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 212 states, 207 states have (on average 1.0048309178743962) internal successors, (208), 207 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) [2022-03-20 18:34:59,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 212 transitions. [2022-03-20 18:34:59,589 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 212 transitions. Word has length 209 [2022-03-20 18:34:59,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:34:59,589 INFO L478 AbstractCegarLoop]: Abstraction has 212 states and 212 transitions. [2022-03-20 18:34:59,589 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 103 states, 103 states have (on average 1.9902912621359223) internal successors, (205), 102 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) [2022-03-20 18:34:59,589 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 212 transitions. [2022-03-20 18:34:59,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 212 [2022-03-20 18:34:59,589 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:34:59,590 INFO L499 BasicCegarLoop]: trace histogram [100, 100, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:34:59,590 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99 [2022-03-20 18:34:59,590 INFO L403 AbstractCegarLoop]: === Iteration 101 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:34:59,590 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:34:59,590 INFO L85 PathProgramCache]: Analyzing trace with hash -1666805752, now seen corresponding path program 100 times [2022-03-20 18:34:59,590 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:34:59,590 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1821829676] [2022-03-20 18:34:59,611 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 18:34:59,612 INFO L85 PathProgramCache]: Analyzing trace with hash 63933778, now seen corresponding path program 1 times [2022-03-20 18:34:59,612 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:34:59,612 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1429951172] [2022-03-20 18:34:59,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:34:59,612 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:34:59,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:34:59,623 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:34:59,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:34:59,624 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:34:59,625 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:34:59,625 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1429951172] [2022-03-20 18:34:59,625 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1429951172] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:34:59,625 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:34:59,625 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 18:35:03,846 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:35:03,846 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1821829676] [2022-03-20 18:35:03,846 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1821829676] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:35:03,846 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:35:03,846 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [104] imperfect sequences [] total 104 [2022-03-20 18:35:03,846 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [433240739] [2022-03-20 18:35:03,846 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:35:03,848 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 104 states [2022-03-20 18:35:03,848 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:35:03,848 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 104 interpolants. [2022-03-20 18:35:03,849 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=205, Invalid=10507, Unknown=0, NotChecked=0, Total=10712 [2022-03-20 18:35:03,849 INFO L87 Difference]: Start difference. First operand 212 states and 212 transitions. Second operand has 104 states, 104 states have (on average 1.9903846153846154) internal successors, (207), 103 states have internal predecessors, (207), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:35:12,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:35:12,136 INFO L93 Difference]: Finished difference Result 220 states and 220 transitions. [2022-03-20 18:35:12,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 104 states. [2022-03-20 18:35:12,136 INFO L78 Accepts]: Start accepts. Automaton has has 104 states, 104 states have (on average 1.9903846153846154) internal successors, (207), 103 states have internal predecessors, (207), 2 states have call successors, (3), 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 211 [2022-03-20 18:35:12,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:35:12,137 INFO L225 Difference]: With dead ends: 220 [2022-03-20 18:35:12,137 INFO L226 Difference]: Without dead ends: 215 [2022-03-20 18:35:12,139 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 313 GetRequests, 61 SyntacticMatches, 49 SemanticMatches, 203 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5050 ImplicationChecksByTransitivity, 7.3s TimeCoverageRelationStatistics Valid=609, Invalid=41211, Unknown=0, NotChecked=0, Total=41820 [2022-03-20 18:35:12,139 INFO L913 BasicCegarLoop]: 11 mSDtfsCounter, 109 mSDsluCounter, 507 mSDsCounter, 0 mSdLazyCounter, 21009 mSolverCounterSat, 103 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 109 SdHoareTripleChecker+Valid, 518 SdHoareTripleChecker+Invalid, 21112 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 103 IncrementalHoareTripleChecker+Valid, 21009 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.9s IncrementalHoareTripleChecker+Time [2022-03-20 18:35:12,139 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [109 Valid, 518 Invalid, 21112 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [103 Valid, 21009 Invalid, 0 Unknown, 0 Unchecked, 4.9s Time] [2022-03-20 18:35:12,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2022-03-20 18:35:12,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 214. [2022-03-20 18:35:12,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 214 states, 209 states have (on average 1.0047846889952152) internal successors, (210), 209 states have internal predecessors, (210), 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) [2022-03-20 18:35:12,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 214 transitions. [2022-03-20 18:35:12,204 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 214 transitions. Word has length 211 [2022-03-20 18:35:12,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:35:12,205 INFO L478 AbstractCegarLoop]: Abstraction has 214 states and 214 transitions. [2022-03-20 18:35:12,205 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 104 states, 104 states have (on average 1.9903846153846154) internal successors, (207), 103 states have internal predecessors, (207), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:35:12,205 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 214 transitions. [2022-03-20 18:35:12,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 214 [2022-03-20 18:35:12,205 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:35:12,205 INFO L499 BasicCegarLoop]: trace histogram [101, 101, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:35:12,206 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100 [2022-03-20 18:35:12,206 INFO L403 AbstractCegarLoop]: === Iteration 102 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:35:12,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:35:12,206 INFO L85 PathProgramCache]: Analyzing trace with hash 1324469094, now seen corresponding path program 101 times [2022-03-20 18:35:12,206 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:35:12,206 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1018181784] [2022-03-20 18:35:12,228 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 18:35:12,228 INFO L85 PathProgramCache]: Analyzing trace with hash 123039122, now seen corresponding path program 1 times [2022-03-20 18:35:12,228 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:35:12,228 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [423577274] [2022-03-20 18:35:12,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:35:12,228 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:35:12,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:35:12,239 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:35:12,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:35:12,240 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:35:12,240 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:35:12,240 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [423577274] [2022-03-20 18:35:12,240 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [423577274] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:35:12,240 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:35:12,240 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 18:35:16,611 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:35:16,611 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1018181784] [2022-03-20 18:35:16,611 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1018181784] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:35:16,611 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:35:16,611 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [105] imperfect sequences [] total 105 [2022-03-20 18:35:16,611 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1265017071] [2022-03-20 18:35:16,611 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:35:16,611 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 105 states [2022-03-20 18:35:16,612 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:35:16,612 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 105 interpolants. [2022-03-20 18:35:16,612 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=207, Invalid=10713, Unknown=0, NotChecked=0, Total=10920 [2022-03-20 18:35:16,612 INFO L87 Difference]: Start difference. First operand 214 states and 214 transitions. Second operand has 105 states, 105 states have (on average 1.9904761904761905) internal successors, (209), 104 states have internal predecessors, (209), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:35:25,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:35:25,206 INFO L93 Difference]: Finished difference Result 222 states and 222 transitions. [2022-03-20 18:35:25,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 105 states. [2022-03-20 18:35:25,207 INFO L78 Accepts]: Start accepts. Automaton has has 105 states, 105 states have (on average 1.9904761904761905) internal successors, (209), 104 states have internal predecessors, (209), 2 states have call successors, (3), 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 213 [2022-03-20 18:35:25,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:35:25,207 INFO L225 Difference]: With dead ends: 222 [2022-03-20 18:35:25,207 INFO L226 Difference]: Without dead ends: 217 [2022-03-20 18:35:25,209 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 316 GetRequests, 56 SyntacticMatches, 55 SemanticMatches, 205 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5151 ImplicationChecksByTransitivity, 7.6s TimeCoverageRelationStatistics Valid=615, Invalid=42027, Unknown=0, NotChecked=0, Total=42642 [2022-03-20 18:35:25,209 INFO L913 BasicCegarLoop]: 11 mSDtfsCounter, 110 mSDsluCounter, 512 mSDsCounter, 0 mSdLazyCounter, 21421 mSolverCounterSat, 104 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 523 SdHoareTripleChecker+Invalid, 21525 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 104 IncrementalHoareTripleChecker+Valid, 21421 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.1s IncrementalHoareTripleChecker+Time [2022-03-20 18:35:25,210 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [110 Valid, 523 Invalid, 21525 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [104 Valid, 21421 Invalid, 0 Unknown, 0 Unchecked, 5.1s Time] [2022-03-20 18:35:25,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 217 states. [2022-03-20 18:35:25,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 217 to 216. [2022-03-20 18:35:25,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 216 states, 211 states have (on average 1.004739336492891) internal successors, (212), 211 states have internal predecessors, (212), 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) [2022-03-20 18:35:25,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 216 transitions. [2022-03-20 18:35:25,278 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 216 transitions. Word has length 213 [2022-03-20 18:35:25,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:35:25,278 INFO L478 AbstractCegarLoop]: Abstraction has 216 states and 216 transitions. [2022-03-20 18:35:25,278 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 105 states, 105 states have (on average 1.9904761904761905) internal successors, (209), 104 states have internal predecessors, (209), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:35:25,278 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 216 transitions. [2022-03-20 18:35:25,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 216 [2022-03-20 18:35:25,279 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:35:25,279 INFO L499 BasicCegarLoop]: trace histogram [102, 102, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:35:25,279 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101 [2022-03-20 18:35:25,279 INFO L403 AbstractCegarLoop]: === Iteration 103 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:35:25,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:35:25,279 INFO L85 PathProgramCache]: Analyzing trace with hash -1688492220, now seen corresponding path program 102 times [2022-03-20 18:35:25,279 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:35:25,279 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [837783090] [2022-03-20 18:35:25,301 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 18:35:25,302 INFO L85 PathProgramCache]: Analyzing trace with hash 182144466, now seen corresponding path program 1 times [2022-03-20 18:35:25,302 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:35:25,302 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [730379846] [2022-03-20 18:35:25,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:35:25,302 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:35:25,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:35:25,325 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:35:25,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:35:25,327 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:35:25,327 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:35:25,327 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [730379846] [2022-03-20 18:35:25,327 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [730379846] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:35:25,328 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:35:25,328 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 18:35:29,639 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:35:29,639 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [837783090] [2022-03-20 18:35:29,639 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [837783090] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:35:29,639 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:35:29,639 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [106] imperfect sequences [] total 106 [2022-03-20 18:35:29,639 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1400085438] [2022-03-20 18:35:29,639 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:35:29,639 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 106 states [2022-03-20 18:35:29,639 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:35:29,640 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 106 interpolants. [2022-03-20 18:35:29,640 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=209, Invalid=10921, Unknown=0, NotChecked=0, Total=11130 [2022-03-20 18:35:29,640 INFO L87 Difference]: Start difference. First operand 216 states and 216 transitions. Second operand has 106 states, 106 states have (on average 1.990566037735849) internal successors, (211), 105 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) [2022-03-20 18:35:38,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:35:38,403 INFO L93 Difference]: Finished difference Result 224 states and 224 transitions. [2022-03-20 18:35:38,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 106 states. [2022-03-20 18:35:38,404 INFO L78 Accepts]: Start accepts. Automaton has has 106 states, 106 states have (on average 1.990566037735849) internal successors, (211), 105 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 [2022-03-20 18:35:38,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:35:38,404 INFO L225 Difference]: With dead ends: 224 [2022-03-20 18:35:38,404 INFO L226 Difference]: Without dead ends: 219 [2022-03-20 18:35:38,406 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 319 GetRequests, 64 SyntacticMatches, 48 SemanticMatches, 207 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5253 ImplicationChecksByTransitivity, 7.6s TimeCoverageRelationStatistics Valid=621, Invalid=42851, Unknown=0, NotChecked=0, Total=43472 [2022-03-20 18:35:38,406 INFO L913 BasicCegarLoop]: 11 mSDtfsCounter, 111 mSDsluCounter, 517 mSDsCounter, 0 mSdLazyCounter, 21837 mSolverCounterSat, 105 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 528 SdHoareTripleChecker+Invalid, 21942 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 105 IncrementalHoareTripleChecker+Valid, 21837 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.2s IncrementalHoareTripleChecker+Time [2022-03-20 18:35:38,406 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [111 Valid, 528 Invalid, 21942 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [105 Valid, 21837 Invalid, 0 Unknown, 0 Unchecked, 5.2s Time] [2022-03-20 18:35:38,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2022-03-20 18:35:38,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 218. [2022-03-20 18:35:38,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 218 states, 213 states have (on average 1.0046948356807512) internal successors, (214), 213 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) [2022-03-20 18:35:38,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 218 states to 218 states and 218 transitions. [2022-03-20 18:35:38,468 INFO L78 Accepts]: Start accepts. Automaton has 218 states and 218 transitions. Word has length 215 [2022-03-20 18:35:38,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:35:38,468 INFO L478 AbstractCegarLoop]: Abstraction has 218 states and 218 transitions. [2022-03-20 18:35:38,468 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 106 states, 106 states have (on average 1.990566037735849) internal successors, (211), 105 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) [2022-03-20 18:35:38,468 INFO L276 IsEmpty]: Start isEmpty. Operand 218 states and 218 transitions. [2022-03-20 18:35:38,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 218 [2022-03-20 18:35:38,469 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:35:38,469 INFO L499 BasicCegarLoop]: trace histogram [103, 103, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:35:38,469 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable102 [2022-03-20 18:35:38,469 INFO L403 AbstractCegarLoop]: === Iteration 104 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:35:38,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:35:38,469 INFO L85 PathProgramCache]: Analyzing trace with hash 1958609826, now seen corresponding path program 103 times [2022-03-20 18:35:38,469 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:35:38,469 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2005680104] [2022-03-20 18:35:38,491 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 18:35:38,491 INFO L85 PathProgramCache]: Analyzing trace with hash 241249810, now seen corresponding path program 1 times [2022-03-20 18:35:38,492 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:35:38,492 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1056856419] [2022-03-20 18:35:38,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:35:38,492 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:35:38,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:35:38,534 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:35:38,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:35:38,536 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:35:38,536 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:35:38,536 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1056856419] [2022-03-20 18:35:38,537 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1056856419] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:35:38,537 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:35:38,537 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 18:35:43,265 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:35:43,266 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2005680104] [2022-03-20 18:35:43,266 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2005680104] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:35:43,266 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:35:43,266 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [107] imperfect sequences [] total 107 [2022-03-20 18:35:43,266 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [384859280] [2022-03-20 18:35:43,266 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:35:43,266 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 107 states [2022-03-20 18:35:43,266 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:35:43,266 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 107 interpolants. [2022-03-20 18:35:43,267 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=211, Invalid=11131, Unknown=0, NotChecked=0, Total=11342 [2022-03-20 18:35:43,267 INFO L87 Difference]: Start difference. First operand 218 states and 218 transitions. Second operand has 107 states, 107 states have (on average 1.9906542056074767) internal successors, (213), 106 states have internal predecessors, (213), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:35:52,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:35:52,169 INFO L93 Difference]: Finished difference Result 226 states and 226 transitions. [2022-03-20 18:35:52,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 107 states. [2022-03-20 18:35:52,170 INFO L78 Accepts]: Start accepts. Automaton has has 107 states, 107 states have (on average 1.9906542056074767) internal successors, (213), 106 states have internal predecessors, (213), 2 states have call successors, (3), 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 217 [2022-03-20 18:35:52,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:35:52,171 INFO L225 Difference]: With dead ends: 226 [2022-03-20 18:35:52,171 INFO L226 Difference]: Without dead ends: 221 [2022-03-20 18:35:52,173 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 322 GetRequests, 55 SyntacticMatches, 58 SemanticMatches, 209 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5356 ImplicationChecksByTransitivity, 8.1s TimeCoverageRelationStatistics Valid=627, Invalid=43683, Unknown=0, NotChecked=0, Total=44310 [2022-03-20 18:35:52,173 INFO L913 BasicCegarLoop]: 11 mSDtfsCounter, 112 mSDsluCounter, 522 mSDsCounter, 0 mSdLazyCounter, 22257 mSolverCounterSat, 106 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 112 SdHoareTripleChecker+Valid, 533 SdHoareTripleChecker+Invalid, 22363 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 106 IncrementalHoareTripleChecker+Valid, 22257 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.3s IncrementalHoareTripleChecker+Time [2022-03-20 18:35:52,173 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [112 Valid, 533 Invalid, 22363 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [106 Valid, 22257 Invalid, 0 Unknown, 0 Unchecked, 5.3s Time] [2022-03-20 18:35:52,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2022-03-20 18:35:52,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 220. [2022-03-20 18:35:52,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 220 states, 215 states have (on average 1.0046511627906978) internal successors, (216), 215 states have internal predecessors, (216), 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) [2022-03-20 18:35:52,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 220 states to 220 states and 220 transitions. [2022-03-20 18:35:52,249 INFO L78 Accepts]: Start accepts. Automaton has 220 states and 220 transitions. Word has length 217 [2022-03-20 18:35:52,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:35:52,249 INFO L478 AbstractCegarLoop]: Abstraction has 220 states and 220 transitions. [2022-03-20 18:35:52,249 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 107 states, 107 states have (on average 1.9906542056074767) internal successors, (213), 106 states have internal predecessors, (213), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:35:52,249 INFO L276 IsEmpty]: Start isEmpty. Operand 220 states and 220 transitions. [2022-03-20 18:35:52,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 220 [2022-03-20 18:35:52,250 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:35:52,250 INFO L499 BasicCegarLoop]: trace histogram [104, 104, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:35:52,250 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable103 [2022-03-20 18:35:52,250 INFO L403 AbstractCegarLoop]: === Iteration 105 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:35:52,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:35:52,250 INFO L85 PathProgramCache]: Analyzing trace with hash 2130362496, now seen corresponding path program 104 times [2022-03-20 18:35:52,250 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:35:52,251 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [98852135] [2022-03-20 18:35:52,330 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 18:35:52,331 INFO L85 PathProgramCache]: Analyzing trace with hash 300355154, now seen corresponding path program 1 times [2022-03-20 18:35:52,331 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:35:52,331 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [525419544] [2022-03-20 18:35:52,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:35:52,331 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:35:52,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:35:52,343 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:35:52,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:35:52,345 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:35:52,345 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:35:52,345 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [525419544] [2022-03-20 18:35:52,345 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [525419544] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:35:52,345 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:35:52,345 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 18:35:57,117 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:35:57,117 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [98852135] [2022-03-20 18:35:57,117 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [98852135] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:35:57,117 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:35:57,117 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [108] imperfect sequences [] total 108 [2022-03-20 18:35:57,117 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1781013128] [2022-03-20 18:35:57,117 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:35:57,118 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 108 states [2022-03-20 18:35:57,118 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:35:57,118 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 108 interpolants. [2022-03-20 18:35:57,119 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=213, Invalid=11343, Unknown=0, NotChecked=0, Total=11556 [2022-03-20 18:35:57,119 INFO L87 Difference]: Start difference. First operand 220 states and 220 transitions. Second operand has 108 states, 108 states have (on average 1.9907407407407407) internal successors, (215), 107 states have internal predecessors, (215), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:36:06,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:36:06,175 INFO L93 Difference]: Finished difference Result 228 states and 228 transitions. [2022-03-20 18:36:06,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 108 states. [2022-03-20 18:36:06,175 INFO L78 Accepts]: Start accepts. Automaton has has 108 states, 108 states have (on average 1.9907407407407407) internal successors, (215), 107 states have internal predecessors, (215), 2 states have call successors, (3), 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 219 [2022-03-20 18:36:06,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:36:06,176 INFO L225 Difference]: With dead ends: 228 [2022-03-20 18:36:06,176 INFO L226 Difference]: Without dead ends: 223 [2022-03-20 18:36:06,178 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 325 GetRequests, 62 SyntacticMatches, 52 SemanticMatches, 211 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5460 ImplicationChecksByTransitivity, 8.2s TimeCoverageRelationStatistics Valid=633, Invalid=44523, Unknown=0, NotChecked=0, Total=45156 [2022-03-20 18:36:06,178 INFO L913 BasicCegarLoop]: 11 mSDtfsCounter, 113 mSDsluCounter, 527 mSDsCounter, 0 mSdLazyCounter, 22681 mSolverCounterSat, 107 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 113 SdHoareTripleChecker+Valid, 538 SdHoareTripleChecker+Invalid, 22788 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 107 IncrementalHoareTripleChecker+Valid, 22681 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.4s IncrementalHoareTripleChecker+Time [2022-03-20 18:36:06,178 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [113 Valid, 538 Invalid, 22788 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [107 Valid, 22681 Invalid, 0 Unknown, 0 Unchecked, 5.4s Time] [2022-03-20 18:36:06,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2022-03-20 18:36:06,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 222. [2022-03-20 18:36:06,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 222 states, 217 states have (on average 1.0046082949308757) internal successors, (218), 217 states have internal predecessors, (218), 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) [2022-03-20 18:36:06,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222 states to 222 states and 222 transitions. [2022-03-20 18:36:06,264 INFO L78 Accepts]: Start accepts. Automaton has 222 states and 222 transitions. Word has length 219 [2022-03-20 18:36:06,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:36:06,264 INFO L478 AbstractCegarLoop]: Abstraction has 222 states and 222 transitions. [2022-03-20 18:36:06,265 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 108 states, 108 states have (on average 1.9907407407407407) internal successors, (215), 107 states have internal predecessors, (215), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:36:06,265 INFO L276 IsEmpty]: Start isEmpty. Operand 222 states and 222 transitions. [2022-03-20 18:36:06,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 222 [2022-03-20 18:36:06,265 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:36:06,265 INFO L499 BasicCegarLoop]: trace histogram [105, 105, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:36:06,265 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104 [2022-03-20 18:36:06,265 INFO L403 AbstractCegarLoop]: === Iteration 106 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:36:06,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:36:06,266 INFO L85 PathProgramCache]: Analyzing trace with hash -319046178, now seen corresponding path program 105 times [2022-03-20 18:36:06,266 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:36:06,266 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [624376042] [2022-03-20 18:36:06,288 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 18:36:06,288 INFO L85 PathProgramCache]: Analyzing trace with hash 359460498, now seen corresponding path program 1 times [2022-03-20 18:36:06,288 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:36:06,288 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1134074783] [2022-03-20 18:36:06,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:36:06,288 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:36:06,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:36:06,299 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:36:06,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:36:06,309 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:36:06,309 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:36:06,309 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1134074783] [2022-03-20 18:36:06,309 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1134074783] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:36:06,309 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:36:06,309 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 18:36:11,217 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:36:11,217 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [624376042] [2022-03-20 18:36:11,217 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [624376042] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:36:11,218 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:36:11,218 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [109] imperfect sequences [] total 109 [2022-03-20 18:36:11,218 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [888829977] [2022-03-20 18:36:11,218 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:36:11,218 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 109 states [2022-03-20 18:36:11,218 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:36:11,218 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 109 interpolants. [2022-03-20 18:36:11,219 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=215, Invalid=11557, Unknown=0, NotChecked=0, Total=11772 [2022-03-20 18:36:11,219 INFO L87 Difference]: Start difference. First operand 222 states and 222 transitions. Second operand has 109 states, 109 states have (on average 1.9908256880733946) internal successors, (217), 108 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) [2022-03-20 18:36:20,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:36:20,355 INFO L93 Difference]: Finished difference Result 230 states and 230 transitions. [2022-03-20 18:36:20,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 109 states. [2022-03-20 18:36:20,355 INFO L78 Accepts]: Start accepts. Automaton has has 109 states, 109 states have (on average 1.9908256880733946) internal successors, (217), 108 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 [2022-03-20 18:36:20,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:36:20,356 INFO L225 Difference]: With dead ends: 230 [2022-03-20 18:36:20,356 INFO L226 Difference]: Without dead ends: 225 [2022-03-20 18:36:20,358 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 328 GetRequests, 59 SyntacticMatches, 56 SemanticMatches, 213 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5565 ImplicationChecksByTransitivity, 8.4s TimeCoverageRelationStatistics Valid=639, Invalid=45371, Unknown=0, NotChecked=0, Total=46010 [2022-03-20 18:36:20,358 INFO L913 BasicCegarLoop]: 11 mSDtfsCounter, 114 mSDsluCounter, 532 mSDsCounter, 0 mSdLazyCounter, 23109 mSolverCounterSat, 108 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 543 SdHoareTripleChecker+Invalid, 23217 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 108 IncrementalHoareTripleChecker+Valid, 23109 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.4s IncrementalHoareTripleChecker+Time [2022-03-20 18:36:20,358 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [114 Valid, 543 Invalid, 23217 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [108 Valid, 23109 Invalid, 0 Unknown, 0 Unchecked, 5.4s Time] [2022-03-20 18:36:20,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225 states. [2022-03-20 18:36:20,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225 to 224. [2022-03-20 18:36:20,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 224 states, 219 states have (on average 1.004566210045662) internal successors, (220), 219 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) [2022-03-20 18:36:20,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 224 transitions. [2022-03-20 18:36:20,434 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 224 transitions. Word has length 221 [2022-03-20 18:36:20,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:36:20,435 INFO L478 AbstractCegarLoop]: Abstraction has 224 states and 224 transitions. [2022-03-20 18:36:20,435 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 109 states, 109 states have (on average 1.9908256880733946) internal successors, (217), 108 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) [2022-03-20 18:36:20,435 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 224 transitions. [2022-03-20 18:36:20,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 224 [2022-03-20 18:36:20,435 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:36:20,435 INFO L499 BasicCegarLoop]: trace histogram [106, 106, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:36:20,436 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105 [2022-03-20 18:36:20,436 INFO L403 AbstractCegarLoop]: === Iteration 107 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:36:20,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:36:20,436 INFO L85 PathProgramCache]: Analyzing trace with hash -558703684, now seen corresponding path program 106 times [2022-03-20 18:36:20,436 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:36:20,436 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1455260302] [2022-03-20 18:36:20,458 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 18:36:20,458 INFO L85 PathProgramCache]: Analyzing trace with hash 418565842, now seen corresponding path program 1 times [2022-03-20 18:36:20,458 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:36:20,458 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1725154913] [2022-03-20 18:36:20,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:36:20,459 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:36:20,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:36:20,473 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:36:20,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:36:20,476 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:36:20,476 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:36:20,476 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1725154913] [2022-03-20 18:36:20,476 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1725154913] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:36:20,476 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:36:20,476 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 18:36:25,401 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:36:25,402 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1455260302] [2022-03-20 18:36:25,402 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1455260302] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:36:25,402 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:36:25,402 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [110] imperfect sequences [] total 110 [2022-03-20 18:36:25,402 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [217718019] [2022-03-20 18:36:25,402 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:36:25,402 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 110 states [2022-03-20 18:36:25,402 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:36:25,402 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 110 interpolants. [2022-03-20 18:36:25,403 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=217, Invalid=11773, Unknown=0, NotChecked=0, Total=11990 [2022-03-20 18:36:25,403 INFO L87 Difference]: Start difference. First operand 224 states and 224 transitions. Second operand has 110 states, 110 states have (on average 1.990909090909091) internal successors, (219), 109 states have internal predecessors, (219), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:36:34,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:36:34,678 INFO L93 Difference]: Finished difference Result 232 states and 232 transitions. [2022-03-20 18:36:34,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 110 states. [2022-03-20 18:36:34,678 INFO L78 Accepts]: Start accepts. Automaton has has 110 states, 110 states have (on average 1.990909090909091) internal successors, (219), 109 states have internal predecessors, (219), 2 states have call successors, (3), 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 223 [2022-03-20 18:36:34,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:36:34,681 INFO L225 Difference]: With dead ends: 232 [2022-03-20 18:36:34,681 INFO L226 Difference]: Without dead ends: 227 [2022-03-20 18:36:34,683 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 331 GetRequests, 58 SyntacticMatches, 58 SemanticMatches, 215 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5671 ImplicationChecksByTransitivity, 8.4s TimeCoverageRelationStatistics Valid=645, Invalid=46227, Unknown=0, NotChecked=0, Total=46872 [2022-03-20 18:36:34,683 INFO L913 BasicCegarLoop]: 11 mSDtfsCounter, 115 mSDsluCounter, 537 mSDsCounter, 0 mSdLazyCounter, 23541 mSolverCounterSat, 109 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 115 SdHoareTripleChecker+Valid, 548 SdHoareTripleChecker+Invalid, 23650 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 109 IncrementalHoareTripleChecker+Valid, 23541 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.5s IncrementalHoareTripleChecker+Time [2022-03-20 18:36:34,683 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [115 Valid, 548 Invalid, 23650 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [109 Valid, 23541 Invalid, 0 Unknown, 0 Unchecked, 5.5s Time] [2022-03-20 18:36:34,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2022-03-20 18:36:34,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 226. [2022-03-20 18:36:34,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 226 states, 221 states have (on average 1.004524886877828) internal successors, (222), 221 states have internal predecessors, (222), 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) [2022-03-20 18:36:34,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 226 states to 226 states and 226 transitions. [2022-03-20 18:36:34,767 INFO L78 Accepts]: Start accepts. Automaton has 226 states and 226 transitions. Word has length 223 [2022-03-20 18:36:34,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:36:34,767 INFO L478 AbstractCegarLoop]: Abstraction has 226 states and 226 transitions. [2022-03-20 18:36:34,767 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 110 states, 110 states have (on average 1.990909090909091) internal successors, (219), 109 states have internal predecessors, (219), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:36:34,767 INFO L276 IsEmpty]: Start isEmpty. Operand 226 states and 226 transitions. [2022-03-20 18:36:34,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 226 [2022-03-20 18:36:34,768 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:36:34,768 INFO L499 BasicCegarLoop]: trace histogram [107, 107, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:36:34,768 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106 [2022-03-20 18:36:34,768 INFO L403 AbstractCegarLoop]: === Iteration 108 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:36:34,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:36:34,768 INFO L85 PathProgramCache]: Analyzing trace with hash 1058667034, now seen corresponding path program 107 times [2022-03-20 18:36:34,768 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:36:34,769 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [217078881] [2022-03-20 18:36:34,790 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 18:36:34,790 INFO L85 PathProgramCache]: Analyzing trace with hash 477671186, now seen corresponding path program 1 times [2022-03-20 18:36:34,790 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:36:34,790 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1666286987] [2022-03-20 18:36:34,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:36:34,790 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:36:34,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:36:34,802 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:36:34,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:36:34,804 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:36:34,804 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:36:34,804 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1666286987] [2022-03-20 18:36:34,804 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1666286987] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:36:34,804 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:36:34,804 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 18:36:39,822 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:36:39,822 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [217078881] [2022-03-20 18:36:39,822 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [217078881] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:36:39,822 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:36:39,822 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [111] imperfect sequences [] total 111 [2022-03-20 18:36:39,822 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [494716754] [2022-03-20 18:36:39,822 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:36:39,823 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 111 states [2022-03-20 18:36:39,823 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:36:39,823 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 111 interpolants. [2022-03-20 18:36:39,824 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=219, Invalid=11991, Unknown=0, NotChecked=0, Total=12210 [2022-03-20 18:36:39,824 INFO L87 Difference]: Start difference. First operand 226 states and 226 transitions. Second operand has 111 states, 111 states have (on average 1.990990990990991) internal successors, (221), 110 states have internal predecessors, (221), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:36:49,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:36:49,529 INFO L93 Difference]: Finished difference Result 234 states and 234 transitions. [2022-03-20 18:36:49,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 111 states. [2022-03-20 18:36:49,530 INFO L78 Accepts]: Start accepts. Automaton has has 111 states, 111 states have (on average 1.990990990990991) internal successors, (221), 110 states have internal predecessors, (221), 2 states have call successors, (3), 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 225 [2022-03-20 18:36:49,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:36:49,533 INFO L225 Difference]: With dead ends: 234 [2022-03-20 18:36:49,534 INFO L226 Difference]: Without dead ends: 229 [2022-03-20 18:36:49,535 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 334 GetRequests, 61 SyntacticMatches, 56 SemanticMatches, 217 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5778 ImplicationChecksByTransitivity, 8.7s TimeCoverageRelationStatistics Valid=651, Invalid=47091, Unknown=0, NotChecked=0, Total=47742 [2022-03-20 18:36:49,535 INFO L913 BasicCegarLoop]: 11 mSDtfsCounter, 116 mSDsluCounter, 542 mSDsCounter, 0 mSdLazyCounter, 23977 mSolverCounterSat, 110 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 116 SdHoareTripleChecker+Valid, 553 SdHoareTripleChecker+Invalid, 24087 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 110 IncrementalHoareTripleChecker+Valid, 23977 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.8s IncrementalHoareTripleChecker+Time [2022-03-20 18:36:49,535 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [116 Valid, 553 Invalid, 24087 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [110 Valid, 23977 Invalid, 0 Unknown, 0 Unchecked, 5.8s Time] [2022-03-20 18:36:49,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 229 states. [2022-03-20 18:36:49,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 229 to 228. [2022-03-20 18:36:49,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 228 states, 223 states have (on average 1.0044843049327354) internal successors, (224), 223 states have internal predecessors, (224), 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) [2022-03-20 18:36:49,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 228 states to 228 states and 228 transitions. [2022-03-20 18:36:49,603 INFO L78 Accepts]: Start accepts. Automaton has 228 states and 228 transitions. Word has length 225 [2022-03-20 18:36:49,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:36:49,603 INFO L478 AbstractCegarLoop]: Abstraction has 228 states and 228 transitions. [2022-03-20 18:36:49,604 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 111 states, 111 states have (on average 1.990990990990991) internal successors, (221), 110 states have internal predecessors, (221), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:36:49,604 INFO L276 IsEmpty]: Start isEmpty. Operand 228 states and 228 transitions. [2022-03-20 18:36:49,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 228 [2022-03-20 18:36:49,604 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:36:49,604 INFO L499 BasicCegarLoop]: trace histogram [108, 108, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:36:49,604 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107 [2022-03-20 18:36:49,604 INFO L403 AbstractCegarLoop]: === Iteration 109 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:36:49,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:36:49,605 INFO L85 PathProgramCache]: Analyzing trace with hash 573765880, now seen corresponding path program 108 times [2022-03-20 18:36:49,605 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:36:49,605 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1912984652] [2022-03-20 18:36:49,626 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 18:36:49,627 INFO L85 PathProgramCache]: Analyzing trace with hash 536776530, now seen corresponding path program 1 times [2022-03-20 18:36:49,627 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:36:49,627 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1430739140] [2022-03-20 18:36:49,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:36:49,627 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:36:49,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:36:49,649 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:36:49,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:36:49,651 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:36:49,651 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:36:49,651 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1430739140] [2022-03-20 18:36:49,651 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1430739140] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:36:49,651 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:36:49,651 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 18:36:54,741 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:36:54,741 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1912984652] [2022-03-20 18:36:54,741 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1912984652] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:36:54,741 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:36:54,741 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [112] imperfect sequences [] total 112 [2022-03-20 18:36:54,742 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1486172917] [2022-03-20 18:36:54,742 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:36:54,742 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 112 states [2022-03-20 18:36:54,742 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:36:54,742 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 112 interpolants. [2022-03-20 18:36:54,743 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=221, Invalid=12211, Unknown=0, NotChecked=0, Total=12432 [2022-03-20 18:36:54,743 INFO L87 Difference]: Start difference. First operand 228 states and 228 transitions. Second operand has 112 states, 112 states have (on average 1.9910714285714286) internal successors, (223), 111 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) [2022-03-20 18:37:04,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:37:04,508 INFO L93 Difference]: Finished difference Result 236 states and 236 transitions. [2022-03-20 18:37:04,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 112 states. [2022-03-20 18:37:04,508 INFO L78 Accepts]: Start accepts. Automaton has has 112 states, 112 states have (on average 1.9910714285714286) internal successors, (223), 111 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 [2022-03-20 18:37:04,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:37:04,509 INFO L225 Difference]: With dead ends: 236 [2022-03-20 18:37:04,509 INFO L226 Difference]: Without dead ends: 231 [2022-03-20 18:37:04,511 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 337 GetRequests, 62 SyntacticMatches, 56 SemanticMatches, 219 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5886 ImplicationChecksByTransitivity, 8.8s TimeCoverageRelationStatistics Valid=657, Invalid=47963, Unknown=0, NotChecked=0, Total=48620 [2022-03-20 18:37:04,511 INFO L913 BasicCegarLoop]: 11 mSDtfsCounter, 117 mSDsluCounter, 547 mSDsCounter, 0 mSdLazyCounter, 24417 mSolverCounterSat, 111 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 117 SdHoareTripleChecker+Valid, 558 SdHoareTripleChecker+Invalid, 24528 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 111 IncrementalHoareTripleChecker+Valid, 24417 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.8s IncrementalHoareTripleChecker+Time [2022-03-20 18:37:04,511 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [117 Valid, 558 Invalid, 24528 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [111 Valid, 24417 Invalid, 0 Unknown, 0 Unchecked, 5.8s Time] [2022-03-20 18:37:04,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2022-03-20 18:37:04,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 230. [2022-03-20 18:37:04,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 230 states, 225 states have (on average 1.0044444444444445) internal successors, (226), 225 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) [2022-03-20 18:37:04,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 230 states to 230 states and 230 transitions. [2022-03-20 18:37:04,580 INFO L78 Accepts]: Start accepts. Automaton has 230 states and 230 transitions. Word has length 227 [2022-03-20 18:37:04,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:37:04,581 INFO L478 AbstractCegarLoop]: Abstraction has 230 states and 230 transitions. [2022-03-20 18:37:04,581 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 112 states, 112 states have (on average 1.9910714285714286) internal successors, (223), 111 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) [2022-03-20 18:37:04,581 INFO L276 IsEmpty]: Start isEmpty. Operand 230 states and 230 transitions. [2022-03-20 18:37:04,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 230 [2022-03-20 18:37:04,581 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:37:04,581 INFO L499 BasicCegarLoop]: trace histogram [109, 109, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:37:04,581 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108 [2022-03-20 18:37:04,582 INFO L403 AbstractCegarLoop]: === Iteration 110 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:37:04,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:37:04,582 INFO L85 PathProgramCache]: Analyzing trace with hash -1559775146, now seen corresponding path program 109 times [2022-03-20 18:37:04,582 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:37:04,582 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1057985961] [2022-03-20 18:37:04,617 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 18:37:04,617 INFO L85 PathProgramCache]: Analyzing trace with hash 595881874, now seen corresponding path program 1 times [2022-03-20 18:37:04,617 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:37:04,617 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [361755463] [2022-03-20 18:37:04,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:37:04,617 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:37:04,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:37:04,630 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:37:04,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:37:04,632 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:37:04,632 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:37:04,632 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [361755463] [2022-03-20 18:37:04,632 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [361755463] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:37:04,632 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:37:04,632 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 18:37:09,948 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:37:09,948 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1057985961] [2022-03-20 18:37:09,948 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1057985961] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:37:09,948 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:37:09,948 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [113] imperfect sequences [] total 113 [2022-03-20 18:37:09,948 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [922407206] [2022-03-20 18:37:09,948 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:37:09,948 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 113 states [2022-03-20 18:37:09,948 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:37:09,949 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 113 interpolants. [2022-03-20 18:37:09,949 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=223, Invalid=12433, Unknown=0, NotChecked=0, Total=12656 [2022-03-20 18:37:09,949 INFO L87 Difference]: Start difference. First operand 230 states and 230 transitions. Second operand has 113 states, 113 states have (on average 1.991150442477876) internal successors, (225), 112 states have internal predecessors, (225), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:37:19,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:37:19,935 INFO L93 Difference]: Finished difference Result 238 states and 238 transitions. [2022-03-20 18:37:19,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 113 states. [2022-03-20 18:37:19,935 INFO L78 Accepts]: Start accepts. Automaton has has 113 states, 113 states have (on average 1.991150442477876) internal successors, (225), 112 states have internal predecessors, (225), 2 states have call successors, (3), 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 229 [2022-03-20 18:37:19,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:37:19,936 INFO L225 Difference]: With dead ends: 238 [2022-03-20 18:37:19,936 INFO L226 Difference]: Without dead ends: 233 [2022-03-20 18:37:19,938 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 340 GetRequests, 60 SyntacticMatches, 59 SemanticMatches, 221 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5995 ImplicationChecksByTransitivity, 9.0s TimeCoverageRelationStatistics Valid=663, Invalid=48843, Unknown=0, NotChecked=0, Total=49506 [2022-03-20 18:37:19,938 INFO L913 BasicCegarLoop]: 11 mSDtfsCounter, 118 mSDsluCounter, 552 mSDsCounter, 0 mSdLazyCounter, 24861 mSolverCounterSat, 112 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 118 SdHoareTripleChecker+Valid, 563 SdHoareTripleChecker+Invalid, 24973 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 112 IncrementalHoareTripleChecker+Valid, 24861 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.9s IncrementalHoareTripleChecker+Time [2022-03-20 18:37:19,938 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [118 Valid, 563 Invalid, 24973 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [112 Valid, 24861 Invalid, 0 Unknown, 0 Unchecked, 5.9s Time] [2022-03-20 18:37:19,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2022-03-20 18:37:20,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 232. [2022-03-20 18:37:20,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 232 states, 227 states have (on average 1.0044052863436124) internal successors, (228), 227 states have internal predecessors, (228), 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) [2022-03-20 18:37:20,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 232 states to 232 states and 232 transitions. [2022-03-20 18:37:20,016 INFO L78 Accepts]: Start accepts. Automaton has 232 states and 232 transitions. Word has length 229 [2022-03-20 18:37:20,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:37:20,016 INFO L478 AbstractCegarLoop]: Abstraction has 232 states and 232 transitions. [2022-03-20 18:37:20,016 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 113 states, 113 states have (on average 1.991150442477876) internal successors, (225), 112 states have internal predecessors, (225), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:37:20,016 INFO L276 IsEmpty]: Start isEmpty. Operand 232 states and 232 transitions. [2022-03-20 18:37:20,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 232 [2022-03-20 18:37:20,017 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:37:20,017 INFO L499 BasicCegarLoop]: trace histogram [110, 110, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:37:20,017 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109 [2022-03-20 18:37:20,017 INFO L403 AbstractCegarLoop]: === Iteration 111 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:37:20,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:37:20,017 INFO L85 PathProgramCache]: Analyzing trace with hash 1101666356, now seen corresponding path program 110 times [2022-03-20 18:37:20,017 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:37:20,017 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1792027514] [2022-03-20 18:37:20,039 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 18:37:20,039 INFO L85 PathProgramCache]: Analyzing trace with hash 654987218, now seen corresponding path program 1 times [2022-03-20 18:37:20,039 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:37:20,040 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1130420273] [2022-03-20 18:37:20,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:37:20,040 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:37:20,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:37:20,058 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:37:20,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:37:20,060 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:37:20,060 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:37:20,060 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1130420273] [2022-03-20 18:37:20,060 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1130420273] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:37:20,060 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:37:20,060 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 18:37:25,491 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:37:25,491 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1792027514] [2022-03-20 18:37:25,491 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1792027514] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:37:25,491 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:37:25,491 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [114] imperfect sequences [] total 114 [2022-03-20 18:37:25,491 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [205299207] [2022-03-20 18:37:25,492 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:37:25,492 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 114 states [2022-03-20 18:37:25,492 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:37:25,492 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 114 interpolants. [2022-03-20 18:37:25,492 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=225, Invalid=12657, Unknown=0, NotChecked=0, Total=12882 [2022-03-20 18:37:25,493 INFO L87 Difference]: Start difference. First operand 232 states and 232 transitions. Second operand has 114 states, 114 states have (on average 1.9912280701754386) internal successors, (227), 113 states have internal predecessors, (227), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:37:35,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:37:35,668 INFO L93 Difference]: Finished difference Result 240 states and 240 transitions. [2022-03-20 18:37:35,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 114 states. [2022-03-20 18:37:35,669 INFO L78 Accepts]: Start accepts. Automaton has has 114 states, 114 states have (on average 1.9912280701754386) internal successors, (227), 113 states have internal predecessors, (227), 2 states have call successors, (3), 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 231 [2022-03-20 18:37:35,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:37:35,669 INFO L225 Difference]: With dead ends: 240 [2022-03-20 18:37:35,669 INFO L226 Difference]: Without dead ends: 235 [2022-03-20 18:37:35,671 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 343 GetRequests, 57 SyntacticMatches, 63 SemanticMatches, 223 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6105 ImplicationChecksByTransitivity, 9.3s TimeCoverageRelationStatistics Valid=669, Invalid=49731, Unknown=0, NotChecked=0, Total=50400 [2022-03-20 18:37:35,671 INFO L913 BasicCegarLoop]: 11 mSDtfsCounter, 119 mSDsluCounter, 557 mSDsCounter, 0 mSdLazyCounter, 25309 mSolverCounterSat, 113 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 119 SdHoareTripleChecker+Valid, 568 SdHoareTripleChecker+Invalid, 25422 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 113 IncrementalHoareTripleChecker+Valid, 25309 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.0s IncrementalHoareTripleChecker+Time [2022-03-20 18:37:35,671 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [119 Valid, 568 Invalid, 25422 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [113 Valid, 25309 Invalid, 0 Unknown, 0 Unchecked, 6.0s Time] [2022-03-20 18:37:35,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 235 states. [2022-03-20 18:37:35,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 235 to 234. [2022-03-20 18:37:35,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 234 states, 229 states have (on average 1.0043668122270741) internal successors, (230), 229 states have internal predecessors, (230), 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) [2022-03-20 18:37:35,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234 states to 234 states and 234 transitions. [2022-03-20 18:37:35,749 INFO L78 Accepts]: Start accepts. Automaton has 234 states and 234 transitions. Word has length 231 [2022-03-20 18:37:35,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:37:35,749 INFO L478 AbstractCegarLoop]: Abstraction has 234 states and 234 transitions. [2022-03-20 18:37:35,749 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 114 states, 114 states have (on average 1.9912280701754386) internal successors, (227), 113 states have internal predecessors, (227), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:37:35,749 INFO L276 IsEmpty]: Start isEmpty. Operand 234 states and 234 transitions. [2022-03-20 18:37:35,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 234 [2022-03-20 18:37:35,750 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:37:35,750 INFO L499 BasicCegarLoop]: trace histogram [111, 111, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:37:35,750 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110 [2022-03-20 18:37:35,750 INFO L403 AbstractCegarLoop]: === Iteration 112 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:37:35,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:37:35,750 INFO L85 PathProgramCache]: Analyzing trace with hash -1053558638, now seen corresponding path program 111 times [2022-03-20 18:37:35,750 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:37:35,750 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1547638890] [2022-03-20 18:37:35,778 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 18:37:35,778 INFO L85 PathProgramCache]: Analyzing trace with hash 714092562, now seen corresponding path program 1 times [2022-03-20 18:37:35,778 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:37:35,778 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1522080417] [2022-03-20 18:37:35,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:37:35,778 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:37:35,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:37:35,789 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:37:35,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:37:35,790 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:37:35,790 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:37:35,790 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1522080417] [2022-03-20 18:37:35,791 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1522080417] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:37:35,791 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:37:35,791 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 18:37:40,685 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:37:40,685 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1547638890] [2022-03-20 18:37:40,685 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1547638890] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:37:40,685 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:37:40,685 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [115] imperfect sequences [] total 115 [2022-03-20 18:37:40,685 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2089344258] [2022-03-20 18:37:40,685 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:37:40,685 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 115 states [2022-03-20 18:37:40,685 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:37:40,685 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 115 interpolants. [2022-03-20 18:37:40,686 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=227, Invalid=12883, Unknown=0, NotChecked=0, Total=13110 [2022-03-20 18:37:40,686 INFO L87 Difference]: Start difference. First operand 234 states and 234 transitions. Second operand has 115 states, 115 states have (on average 1.991304347826087) internal successors, (229), 114 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) [2022-03-20 18:37:50,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:37:50,969 INFO L93 Difference]: Finished difference Result 242 states and 242 transitions. [2022-03-20 18:37:50,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 115 states. [2022-03-20 18:37:50,970 INFO L78 Accepts]: Start accepts. Automaton has has 115 states, 115 states have (on average 1.991304347826087) internal successors, (229), 114 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 [2022-03-20 18:37:50,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:37:50,970 INFO L225 Difference]: With dead ends: 242 [2022-03-20 18:37:50,970 INFO L226 Difference]: Without dead ends: 237 [2022-03-20 18:37:50,972 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 346 GetRequests, 77 SyntacticMatches, 44 SemanticMatches, 225 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6216 ImplicationChecksByTransitivity, 8.8s TimeCoverageRelationStatistics Valid=675, Invalid=50627, Unknown=0, NotChecked=0, Total=51302 [2022-03-20 18:37:50,972 INFO L913 BasicCegarLoop]: 11 mSDtfsCounter, 120 mSDsluCounter, 562 mSDsCounter, 0 mSdLazyCounter, 25761 mSolverCounterSat, 114 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 120 SdHoareTripleChecker+Valid, 573 SdHoareTripleChecker+Invalid, 25875 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 114 IncrementalHoareTripleChecker+Valid, 25761 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.1s IncrementalHoareTripleChecker+Time [2022-03-20 18:37:50,972 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [120 Valid, 573 Invalid, 25875 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [114 Valid, 25761 Invalid, 0 Unknown, 0 Unchecked, 6.1s Time] [2022-03-20 18:37:50,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237 states. [2022-03-20 18:37:51,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237 to 236. [2022-03-20 18:37:51,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 236 states, 231 states have (on average 1.0043290043290043) internal successors, (232), 231 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) [2022-03-20 18:37:51,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 236 states to 236 states and 236 transitions. [2022-03-20 18:37:51,048 INFO L78 Accepts]: Start accepts. Automaton has 236 states and 236 transitions. Word has length 233 [2022-03-20 18:37:51,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:37:51,048 INFO L478 AbstractCegarLoop]: Abstraction has 236 states and 236 transitions. [2022-03-20 18:37:51,048 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 115 states, 115 states have (on average 1.991304347826087) internal successors, (229), 114 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) [2022-03-20 18:37:51,048 INFO L276 IsEmpty]: Start isEmpty. Operand 236 states and 236 transitions. [2022-03-20 18:37:51,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 236 [2022-03-20 18:37:51,049 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:37:51,049 INFO L499 BasicCegarLoop]: trace histogram [112, 112, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:37:51,049 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable111 [2022-03-20 18:37:51,049 INFO L403 AbstractCegarLoop]: === Iteration 113 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:37:51,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:37:51,049 INFO L85 PathProgramCache]: Analyzing trace with hash -2050541200, now seen corresponding path program 112 times [2022-03-20 18:37:51,049 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:37:51,050 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [737133417] [2022-03-20 18:37:51,072 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 18:37:51,072 INFO L85 PathProgramCache]: Analyzing trace with hash 773197906, now seen corresponding path program 1 times [2022-03-20 18:37:51,072 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:37:51,072 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [742010140] [2022-03-20 18:37:51,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:37:51,072 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:37:51,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:37:51,088 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:37:51,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:37:51,090 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:37:51,090 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:37:51,090 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [742010140] [2022-03-20 18:37:51,090 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [742010140] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:37:51,090 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:37:51,090 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 18:37:56,579 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:37:56,579 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [737133417] [2022-03-20 18:37:56,579 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [737133417] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:37:56,579 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:37:56,579 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [116] imperfect sequences [] total 116 [2022-03-20 18:37:56,579 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1096841629] [2022-03-20 18:37:56,579 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:37:56,579 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 116 states [2022-03-20 18:37:56,579 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:37:56,580 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 116 interpolants. [2022-03-20 18:37:56,580 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=229, Invalid=13111, Unknown=0, NotChecked=0, Total=13340 [2022-03-20 18:37:56,581 INFO L87 Difference]: Start difference. First operand 236 states and 236 transitions. Second operand has 116 states, 116 states have (on average 1.9913793103448276) internal successors, (231), 115 states have internal predecessors, (231), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:38:07,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:38:07,195 INFO L93 Difference]: Finished difference Result 244 states and 244 transitions. [2022-03-20 18:38:07,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 116 states. [2022-03-20 18:38:07,195 INFO L78 Accepts]: Start accepts. Automaton has has 116 states, 116 states have (on average 1.9913793103448276) internal successors, (231), 115 states have internal predecessors, (231), 2 states have call successors, (3), 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 235 [2022-03-20 18:38:07,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:38:07,196 INFO L225 Difference]: With dead ends: 244 [2022-03-20 18:38:07,196 INFO L226 Difference]: Without dead ends: 239 [2022-03-20 18:38:07,197 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 349 GetRequests, 59 SyntacticMatches, 63 SemanticMatches, 227 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6328 ImplicationChecksByTransitivity, 9.5s TimeCoverageRelationStatistics Valid=681, Invalid=51531, Unknown=0, NotChecked=0, Total=52212 [2022-03-20 18:38:07,197 INFO L913 BasicCegarLoop]: 11 mSDtfsCounter, 121 mSDsluCounter, 567 mSDsCounter, 0 mSdLazyCounter, 26217 mSolverCounterSat, 115 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 121 SdHoareTripleChecker+Valid, 578 SdHoareTripleChecker+Invalid, 26332 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 115 IncrementalHoareTripleChecker+Valid, 26217 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.3s IncrementalHoareTripleChecker+Time [2022-03-20 18:38:07,198 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [121 Valid, 578 Invalid, 26332 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [115 Valid, 26217 Invalid, 0 Unknown, 0 Unchecked, 6.3s Time] [2022-03-20 18:38:07,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 239 states. [2022-03-20 18:38:07,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 239 to 238. [2022-03-20 18:38:07,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 238 states, 233 states have (on average 1.0042918454935623) internal successors, (234), 233 states have internal predecessors, (234), 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) [2022-03-20 18:38:07,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 238 states to 238 states and 238 transitions. [2022-03-20 18:38:07,271 INFO L78 Accepts]: Start accepts. Automaton has 238 states and 238 transitions. Word has length 235 [2022-03-20 18:38:07,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:38:07,271 INFO L478 AbstractCegarLoop]: Abstraction has 238 states and 238 transitions. [2022-03-20 18:38:07,271 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 116 states, 116 states have (on average 1.9913793103448276) internal successors, (231), 115 states have internal predecessors, (231), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:38:07,272 INFO L276 IsEmpty]: Start isEmpty. Operand 238 states and 238 transitions. [2022-03-20 18:38:07,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 238 [2022-03-20 18:38:07,272 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:38:07,272 INFO L499 BasicCegarLoop]: trace histogram [113, 113, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:38:07,272 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable112 [2022-03-20 18:38:07,272 INFO L403 AbstractCegarLoop]: === Iteration 114 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:38:07,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:38:07,272 INFO L85 PathProgramCache]: Analyzing trace with hash 1921891022, now seen corresponding path program 113 times [2022-03-20 18:38:07,273 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:38:07,273 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [933210420] [2022-03-20 18:38:07,295 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 18:38:07,296 INFO L85 PathProgramCache]: Analyzing trace with hash 832303250, now seen corresponding path program 1 times [2022-03-20 18:38:07,296 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:38:07,296 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [42178991] [2022-03-20 18:38:07,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:38:07,296 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:38:07,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:38:07,307 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:38:07,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:38:07,324 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:38:07,324 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:38:07,324 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [42178991] [2022-03-20 18:38:07,324 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [42178991] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:38:07,324 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:38:07,324 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 18:38:13,005 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:38:13,005 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [933210420] [2022-03-20 18:38:13,005 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [933210420] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:38:13,005 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:38:13,005 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [117] imperfect sequences [] total 117 [2022-03-20 18:38:13,005 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1799396946] [2022-03-20 18:38:13,005 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:38:13,005 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 117 states [2022-03-20 18:38:13,005 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:38:13,006 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 117 interpolants. [2022-03-20 18:38:13,006 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=13341, Unknown=0, NotChecked=0, Total=13572 [2022-03-20 18:38:13,006 INFO L87 Difference]: Start difference. First operand 238 states and 238 transitions. Second operand has 117 states, 117 states have (on average 1.9914529914529915) internal successors, (233), 116 states have internal predecessors, (233), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:38:23,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:38:23,653 INFO L93 Difference]: Finished difference Result 246 states and 246 transitions. [2022-03-20 18:38:23,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 117 states. [2022-03-20 18:38:23,653 INFO L78 Accepts]: Start accepts. Automaton has has 117 states, 117 states have (on average 1.9914529914529915) internal successors, (233), 116 states have internal predecessors, (233), 2 states have call successors, (3), 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 237 [2022-03-20 18:38:23,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:38:23,654 INFO L225 Difference]: With dead ends: 246 [2022-03-20 18:38:23,654 INFO L226 Difference]: Without dead ends: 241 [2022-03-20 18:38:23,655 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 352 GetRequests, 64 SyntacticMatches, 59 SemanticMatches, 229 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6441 ImplicationChecksByTransitivity, 9.7s TimeCoverageRelationStatistics Valid=687, Invalid=52443, Unknown=0, NotChecked=0, Total=53130 [2022-03-20 18:38:23,656 INFO L913 BasicCegarLoop]: 11 mSDtfsCounter, 122 mSDsluCounter, 572 mSDsCounter, 0 mSdLazyCounter, 26677 mSolverCounterSat, 116 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 122 SdHoareTripleChecker+Valid, 583 SdHoareTripleChecker+Invalid, 26793 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 116 IncrementalHoareTripleChecker+Valid, 26677 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.3s IncrementalHoareTripleChecker+Time [2022-03-20 18:38:23,656 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [122 Valid, 583 Invalid, 26793 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [116 Valid, 26677 Invalid, 0 Unknown, 0 Unchecked, 6.3s Time] [2022-03-20 18:38:23,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 241 states. [2022-03-20 18:38:23,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 241 to 240. [2022-03-20 18:38:23,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 240 states, 235 states have (on average 1.004255319148936) internal successors, (236), 235 states have internal predecessors, (236), 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) [2022-03-20 18:38:23,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 240 states to 240 states and 240 transitions. [2022-03-20 18:38:23,739 INFO L78 Accepts]: Start accepts. Automaton has 240 states and 240 transitions. Word has length 237 [2022-03-20 18:38:23,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:38:23,739 INFO L478 AbstractCegarLoop]: Abstraction has 240 states and 240 transitions. [2022-03-20 18:38:23,739 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 117 states, 117 states have (on average 1.9914529914529915) internal successors, (233), 116 states have internal predecessors, (233), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:38:23,740 INFO L276 IsEmpty]: Start isEmpty. Operand 240 states and 240 transitions. [2022-03-20 18:38:23,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 240 [2022-03-20 18:38:23,740 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:38:23,740 INFO L499 BasicCegarLoop]: trace histogram [114, 114, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:38:23,740 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable113 [2022-03-20 18:38:23,740 INFO L403 AbstractCegarLoop]: === Iteration 115 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:38:23,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:38:23,740 INFO L85 PathProgramCache]: Analyzing trace with hash 1203330220, now seen corresponding path program 114 times [2022-03-20 18:38:23,741 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:38:23,741 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [562179069] [2022-03-20 18:38:23,763 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 18:38:23,763 INFO L85 PathProgramCache]: Analyzing trace with hash 891408594, now seen corresponding path program 1 times [2022-03-20 18:38:23,763 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:38:23,763 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1704950962] [2022-03-20 18:38:23,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:38:23,763 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:38:23,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:38:23,781 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:38:23,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:38:23,783 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:38:23,783 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:38:23,783 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1704950962] [2022-03-20 18:38:23,783 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1704950962] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:38:23,783 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:38:23,783 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 18:38:29,157 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:38:29,157 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [562179069] [2022-03-20 18:38:29,157 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [562179069] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:38:29,157 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:38:29,157 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [118] imperfect sequences [] total 118 [2022-03-20 18:38:29,157 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [611361616] [2022-03-20 18:38:29,157 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:38:29,158 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 118 states [2022-03-20 18:38:29,158 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:38:29,158 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 118 interpolants. [2022-03-20 18:38:29,159 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=13573, Unknown=0, NotChecked=0, Total=13806 [2022-03-20 18:38:29,159 INFO L87 Difference]: Start difference. First operand 240 states and 240 transitions. Second operand has 118 states, 118 states have (on average 1.9915254237288136) internal successors, (235), 117 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) [2022-03-20 18:38:39,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:38:39,934 INFO L93 Difference]: Finished difference Result 248 states and 248 transitions. [2022-03-20 18:38:39,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 118 states. [2022-03-20 18:38:39,935 INFO L78 Accepts]: Start accepts. Automaton has has 118 states, 118 states have (on average 1.9915254237288136) internal successors, (235), 117 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 [2022-03-20 18:38:39,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:38:39,935 INFO L225 Difference]: With dead ends: 248 [2022-03-20 18:38:39,935 INFO L226 Difference]: Without dead ends: 243 [2022-03-20 18:38:39,937 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 355 GetRequests, 68 SyntacticMatches, 56 SemanticMatches, 231 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6555 ImplicationChecksByTransitivity, 9.4s TimeCoverageRelationStatistics Valid=693, Invalid=53363, Unknown=0, NotChecked=0, Total=54056 [2022-03-20 18:38:39,937 INFO L913 BasicCegarLoop]: 11 mSDtfsCounter, 123 mSDsluCounter, 577 mSDsCounter, 0 mSdLazyCounter, 27141 mSolverCounterSat, 117 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 123 SdHoareTripleChecker+Valid, 588 SdHoareTripleChecker+Invalid, 27258 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 117 IncrementalHoareTripleChecker+Valid, 27141 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.4s IncrementalHoareTripleChecker+Time [2022-03-20 18:38:39,937 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [123 Valid, 588 Invalid, 27258 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [117 Valid, 27141 Invalid, 0 Unknown, 0 Unchecked, 6.4s Time] [2022-03-20 18:38:39,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2022-03-20 18:38:40,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 242. [2022-03-20 18:38:40,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 242 states, 237 states have (on average 1.0042194092827004) internal successors, (238), 237 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) [2022-03-20 18:38:40,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 242 states to 242 states and 242 transitions. [2022-03-20 18:38:40,020 INFO L78 Accepts]: Start accepts. Automaton has 242 states and 242 transitions. Word has length 239 [2022-03-20 18:38:40,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:38:40,020 INFO L478 AbstractCegarLoop]: Abstraction has 242 states and 242 transitions. [2022-03-20 18:38:40,020 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 118 states, 118 states have (on average 1.9915254237288136) internal successors, (235), 117 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) [2022-03-20 18:38:40,020 INFO L276 IsEmpty]: Start isEmpty. Operand 242 states and 242 transitions. [2022-03-20 18:38:40,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 242 [2022-03-20 18:38:40,021 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:38:40,021 INFO L499 BasicCegarLoop]: trace histogram [115, 115, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:38:40,021 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable114 [2022-03-20 18:38:40,021 INFO L403 AbstractCegarLoop]: === Iteration 116 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:38:40,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:38:40,021 INFO L85 PathProgramCache]: Analyzing trace with hash -2138833142, now seen corresponding path program 115 times [2022-03-20 18:38:40,021 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:38:40,021 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [875136874] [2022-03-20 18:38:40,044 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 18:38:40,045 INFO L85 PathProgramCache]: Analyzing trace with hash 950513938, now seen corresponding path program 1 times [2022-03-20 18:38:40,045 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:38:40,045 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1541962491] [2022-03-20 18:38:40,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:38:40,045 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:38:40,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:38:40,062 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:38:40,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:38:40,064 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:38:40,064 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:38:40,064 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1541962491] [2022-03-20 18:38:40,064 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1541962491] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:38:40,064 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:38:40,064 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 18:38:45,977 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:38:45,977 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [875136874] [2022-03-20 18:38:45,977 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [875136874] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:38:45,977 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:38:45,977 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [119] imperfect sequences [] total 119 [2022-03-20 18:38:45,977 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1357467393] [2022-03-20 18:38:45,977 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:38:45,978 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 119 states [2022-03-20 18:38:45,978 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:38:45,978 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 119 interpolants. [2022-03-20 18:38:45,978 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=235, Invalid=13807, Unknown=0, NotChecked=0, Total=14042 [2022-03-20 18:38:45,978 INFO L87 Difference]: Start difference. First operand 242 states and 242 transitions. Second operand has 119 states, 119 states have (on average 1.9915966386554622) internal successors, (237), 118 states have internal predecessors, (237), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:38:57,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:38:57,177 INFO L93 Difference]: Finished difference Result 250 states and 250 transitions. [2022-03-20 18:38:57,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 119 states. [2022-03-20 18:38:57,177 INFO L78 Accepts]: Start accepts. Automaton has has 119 states, 119 states have (on average 1.9915966386554622) internal successors, (237), 118 states have internal predecessors, (237), 2 states have call successors, (3), 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 241 [2022-03-20 18:38:57,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:38:57,178 INFO L225 Difference]: With dead ends: 250 [2022-03-20 18:38:57,178 INFO L226 Difference]: Without dead ends: 245 [2022-03-20 18:38:57,180 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 358 GetRequests, 62 SyntacticMatches, 63 SemanticMatches, 233 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6670 ImplicationChecksByTransitivity, 10.1s TimeCoverageRelationStatistics Valid=699, Invalid=54291, Unknown=0, NotChecked=0, Total=54990 [2022-03-20 18:38:57,180 INFO L913 BasicCegarLoop]: 11 mSDtfsCounter, 124 mSDsluCounter, 582 mSDsCounter, 0 mSdLazyCounter, 27609 mSolverCounterSat, 118 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 124 SdHoareTripleChecker+Valid, 593 SdHoareTripleChecker+Invalid, 27727 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 118 IncrementalHoareTripleChecker+Valid, 27609 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.6s IncrementalHoareTripleChecker+Time [2022-03-20 18:38:57,180 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [124 Valid, 593 Invalid, 27727 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [118 Valid, 27609 Invalid, 0 Unknown, 0 Unchecked, 6.6s Time] [2022-03-20 18:38:57,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 245 states. [2022-03-20 18:38:57,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 245 to 244. [2022-03-20 18:38:57,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 244 states, 239 states have (on average 1.00418410041841) internal successors, (240), 239 states have internal predecessors, (240), 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) [2022-03-20 18:38:57,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 244 states to 244 states and 244 transitions. [2022-03-20 18:38:57,258 INFO L78 Accepts]: Start accepts. Automaton has 244 states and 244 transitions. Word has length 241 [2022-03-20 18:38:57,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:38:57,258 INFO L478 AbstractCegarLoop]: Abstraction has 244 states and 244 transitions. [2022-03-20 18:38:57,258 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 119 states, 119 states have (on average 1.9915966386554622) internal successors, (237), 118 states have internal predecessors, (237), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:38:57,258 INFO L276 IsEmpty]: Start isEmpty. Operand 244 states and 244 transitions. [2022-03-20 18:38:57,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 244 [2022-03-20 18:38:57,259 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:38:57,259 INFO L499 BasicCegarLoop]: trace histogram [116, 116, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:38:57,259 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115 [2022-03-20 18:38:57,259 INFO L403 AbstractCegarLoop]: === Iteration 117 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:38:57,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:38:57,259 INFO L85 PathProgramCache]: Analyzing trace with hash -1322286616, now seen corresponding path program 116 times [2022-03-20 18:38:57,259 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:38:57,259 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [432260485] [2022-03-20 18:38:57,281 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 18:38:57,281 INFO L85 PathProgramCache]: Analyzing trace with hash 1009619282, now seen corresponding path program 1 times [2022-03-20 18:38:57,282 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:38:57,282 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1881219602] [2022-03-20 18:38:57,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:38:57,282 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:38:57,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:38:57,354 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:38:57,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:38:57,356 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:38:57,356 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:38:57,356 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1881219602] [2022-03-20 18:38:57,356 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1881219602] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:38:57,356 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:38:57,356 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 18:39:02,952 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:39:02,952 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [432260485] [2022-03-20 18:39:02,952 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [432260485] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:39:02,952 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:39:02,952 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [120] imperfect sequences [] total 120 [2022-03-20 18:39:02,952 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [498796201] [2022-03-20 18:39:02,952 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:39:02,953 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 120 states [2022-03-20 18:39:02,953 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:39:02,953 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 120 interpolants. [2022-03-20 18:39:02,954 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=237, Invalid=14043, Unknown=0, NotChecked=0, Total=14280 [2022-03-20 18:39:02,954 INFO L87 Difference]: Start difference. First operand 244 states and 244 transitions. Second operand has 120 states, 120 states have (on average 1.9916666666666667) internal successors, (239), 119 states have internal predecessors, (239), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1)